Document and Entity Information - USD ($)	12 Months Ended
Document and Entity Information - USD ($)	Dec. 31, 2015	Feb. 22, 2016	Jun. 30, 2015
Document And Entity Information [Abstract]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2015
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	FY
Trading Symbol	BRO
Entity Registrant Name	BROWN & BROWN INC
Entity Central Index Key	0000079282
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		138,616,818
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Public Float			$ 3,818,857,004

CONDENSED CONSOLIDATED STATEMENTS OF INCOME (UNAUDITED) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
REVENUES
Commissions and fees	$ 1,656,951	$ 1,567,460	$ 1,355,503
Investment income	1,004	747	638
Other income, net	2,554	7,589	7,138
Total revenues	1,660,509	1,575,796	1,363,279
EXPENSES
Employee compensation and benefits	841,439	791,749	683,000
Non-cash stock-based compensation	15,513	19,363	22,603
Other operating expenses	251,055	235,328	195,677
Loss/(gain) on disposal	(619)	47,425	0
Amortization	87,421	82,941	67,932
Depreciation	20,890	20,895	17,485
Interest	39,248	28,408	16,440
Change in estimated acquisition earn-out payables	3,003	9,938	2,533
Total expenses	1,257,950	1,236,047	1,005,670
Income before income taxes	402,559	339,749	357,609
Income taxes	159,241	132,853	140,497
Net income	$ 243,318	$ 206,896	$ 217,112
Net income per share:
Basic (in dollars per share)	$ 1.72	$ 1.43	$ 1.50
Diluted (in dollars per share)	1.70	1.41	1.48
Dividends declared per share (in dollars per share)	$ 0.45	$ 0.41	$ 0.37

CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Current Assets:
Cash and cash equivalents	$ 443,420	$ 470,048
Restricted cash and investments	229,753	259,769
Short-term investments	13,734	11,157
Premiums, commissions and fees receivable	433,885	424,547
Reinsurance recoverable	31,968	13,028
Prepaid reinsurance premiums	309,643	320,586
Deferred income taxes	24,635	25,431
Other current assets	50,351	45,542
Total current assets	1,537,389	1,570,108
Fixed assets, net	81,753	84,668
Goodwill	2,586,683	2,460,611
Amortizable intangible assets, net	744,680	784,642
Investments	18,092	19,862
Other assets	44,142	36,567
Total assets	5,012,739	4,956,458
Current Liabilities:
Premiums payable to insurance companies	574,736	568,184
Losses and loss adjustment reserve	31,968	13,028
Unearned premiums	309,643	320,586
Premium deposits and credits due customers	83,098	83,313
Accounts payable	63,910	57,261
Accrued expenses and other liabilities	192,067	181,156
Current portion of long-term debt	73,125	45,625
Total current liabilities	1,328,547	1,269,153
Long-term debt	1,079,878	1,152,846
Deferred income taxes, net	360,949	341,497
Other liabilities	93,589	79,217
Shareholders’ Equity:
Common stock, par value $0.10 per share; authorized 280,000 shares; issued 146,415 shares and outstanding 138,985 shares at 2015, issued 145,871 shares and outstanding 143,486 shares at 2014	14,642	14,587
Additional paid-in capital	426,498	405,982
Treasury stock, at cost 7,430 and 2,385 shares at 2015 and 2014, respectively	(238,775)	(75,025)
Retained earnings	1,947,411	1,768,201
Total shareholders’ equity	2,149,776	2,113,745
Total liabilities and shareholders’ equity	$ 5,012,739	$ 4,956,458

CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED) (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Common stock, par value (in dollars per share)	$ 0.10	$ 0.10
Common stock, shares authorized (in shares)	280,000,000	280,000,000
Common stock, shares issued (in shares)	146,415,000	145,871,000
Common Stock, Shares, Outstanding	138,985,000	143,486,000
Treasury stock shares (in shares)	7,430,000	2,385,000
Tax effect of accumulated other comprehensive income	$ (1)	$ 0

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Cash flows from operating activities:
Net income	$ 243,318	$ 206,896	$ 217,112
Adjustments to reconcile net income to net cash provided by operating activities:
Amortization	87,421	82,941	67,932
Depreciation	20,890	20,895	17,485
Share-based Compensation	15,513	19,363	22,603
Change in estimated acquisition earn-out payables	3,003	9,938	2,533
Deferred income taxes	22,696	7,369	32,247
Amortization of debt discount	157	46	0
Income tax benefit from exercise of shares from the stock benefit plans	(3,276)	(3,298)	(2,358)
Payments On Acquisition Earn Outs In Excess Of Original Estimated Payables	(11,383)	(2,539)	(2,788)
(Gain)/loss on sales of investments, fixed assets and customer accounts	(107)	42,465	(2,806)
Changes in operating assets and liabilities, net of effect from acquisitions and divestitures:
Restricted cash and investments decrease (increase)	30,016	(9,760)	(85,445)
Premiums, commissions and fees receivable (increase)	(7,163)	(11,160)	(40,729)
Reinsurance recoverables (increase) decrease	(18,940)	12,210	0
Prepaid reinsurance premiums decrease (increase)	10,943	(31,573)	0
Other assets (increase)	(5,318)	(12,564)	(2,583)
Premiums payable to insurance companies decrease	542	8,164	61,624
Premium deposits and credits due customers (decrease) increase	(2,973)	2,323	41,049
Losses and loss adjustment reserve increase (decrease)	18,940	(12,210)	0
Unearned premiums (decrease) increase	(10,943)	31,573	0
Accounts payable increase	34,206	36,949	5,180
Accrued expenses and other liabilities increase	8,204	11,718	70,872
Other liabilities (decrease)	(23,898)	(24,727)	(12,554)
Net cash provided by operating activities	411,848	385,019	389,374
Cash flows from investing activities:
Additions to fixed assets	(18,375)	(24,923)	(16,366)
Payments for businesses acquired, net of cash acquired	(136,000)	(696,486)	(367,712)
Proceeds from sales of fixed assets and customer accounts	10,576	13,631	5,886
Purchases of investments	(22,766)	(17,813)	(18,102)
Proceeds from Sale, Maturity and Collection of Investments	21,928	18,278	15,662
Net cash used in investing activities	(144,637)	(707,313)	(380,632)
Cash flows from financing activities:
Payments on acquisition earn-outs	(25,415)	(9,530)	(15,491)
Proceeds from Issuance of Long-term Debt	0	1,048,425	30,000
Payments on long-term debt	(45,625)	(330,000)	(93)
Income tax benefit from exercise of shares from the stock benefit plans	3,276	3,298	2,358
Issuances of common stock for employee stock benefit plans	15,890	14,808	12,445
Repurchase of stock benefit plan shares for employees to fund tax withholdings	(2,857)	(3,252)	(1,284)
Purchase of treasury stock	(163,750)	(75,025)	0
Prepayment of accelerated share repurchase program	(11,250)	0	0
Cash dividends paid	(64,108)	(59,334)	(53,546)
Net cash (used in) provided by financing activities	(293,839)	589,390	(25,611)
Net (decrease) increase in cash and cash equivalents	(26,628)	267,096	(16,869)
Cash and cash equivalents at beginning of period	470,048	202,952	219,821
Cash and cash equivalents at end of period	443,420	470,048	202,952
Proceeds from Lines of Credit	0	475,000	31,863
Repayments of Lines of Credit	$ 0	$ (475,000)	$ (31,863)

Shareholders Equity Statement - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Treasury Stock [Member]	Retained Earnings [Member]
Common Stock, Shares, Outstanding		143,878
Stockholders' Equity Attributable to Parent at Dec. 31, 2012	$ 1,807,333	$ 14,388	$ 335,872	$ 0	$ 1,457,073
Dividends, Cash	(53,546)				(53,546)
Net Income (Loss) Attributable to Parent	217,112				217,112
Stock Issued During Period, Value, Employee Benefit Plan		1,541
Stock Issued During Period, Value, Employee Benefit Plan	33,884	$ 154	33,730
Adjustment to Additional Paid in Capital, Income Tax Effect from Share-based Compensation, Net	2,358		2,358
Stockholders' Equity Attributable to Parent at Dec. 31, 2013	$ 2,007,141	$ 14,542	$ 371,960	0	1,620,639
Common Stock, Shares, Outstanding		145,419
Common Stock Issued to Directors	320,000	1,000	319,000
Dividends, Cash	$ (59,334)				(59,334)
Net Income (Loss) Attributable to Parent	206,896				206,896
Stock Issued During Period, Value, Employee Benefit Plan		442
Stock Issued During Period, Value, Employee Benefit Plan	30,449	$ 44	$ 30,405
Treasury Stock, Value, Acquired, Cost Method	(75,025)			(75,025)
Adjustment to Additional Paid in Capital, Income Tax Effect from Share-based Compensation, Net	3,298		3,298
Common Stock Issued to Directors Shares		10
Stockholders' Equity Attributable to Parent at Dec. 31, 2014	$ 2,113,745	$ 14,587	$ 405,982	(75,025)	1,768,201
Common Stock, Shares, Outstanding	143,486,000	145,871
Common Stock Issued to Directors	500,000	2,000	498,000
Dividends, Cash	$ (64,108)				(64,108)
Net Income (Loss) Attributable to Parent	243,318				243,318
Stock Issued During Period, Value, Employee Benefit Plan		528
Stock Issued During Period, Value, Employee Benefit Plan	28,045	$ 53	$ 27,992
Treasury Stock, Value, Acquired, Cost Method	(175,000)		(11,250)	(163,750)
Adjustment to Additional Paid in Capital, Income Tax Effect from Share-based Compensation, Net	3,276		3,276
Common Stock Issued to Directors Shares		16
Stockholders' Equity Attributable to Parent at Dec. 31, 2015	$ 2,149,776	$ 14,642	$ 426,498	$ (238,775)	$ 1,947,411
Common Stock, Shares, Outstanding	138,985,000	146,415

Net Income Per Share

12 Months Ended

Dec. 31, 2015

Earnings Per Share [Abstract]

Net Income Per Share

Basic EPS is computed based on the weighted average number of common shares (including participating securities) issued and outstanding during the period. Diluted EPS is computed based on the weighted average number of common shares issued and outstanding plus equivalent shares, assuming the exercise of stock options. The dilutive effect of stock options is computed by application of the treasury-stock method. The following is a reconciliation between basic and diluted weighted average shares outstanding for the years ended December 31:



(in thousands, except per share data)	2015			2014			2013
Net income	$	243,318		$	206,896		$	217,112
Net income attributable to unvested awarded performance stock	(5,695		)	(5,186		)	(5,446		)
Net income attributable to common shares	$	237,623		$	201,710		$	211,666
Weighted average number of common shares outstanding – basic	141,113			144,568			144,662
Less unvested awarded performance stock included in weighted average number of common shares outstanding – basic	(3,303		)	(3,624		)	(3,629		)
Weighted average number of common shares outstanding for basic earnings per common share	137,810			140,944			141,033
Dilutive effect of stock options	2,302			1,947			1,591
Weighted average number of shares outstanding – diluted	140,112			142,891			142,624
Net income per share:
Basic	$	1.72		$	1.43		$	1.50
Diluted	$	1.70		$	1.41		$	1.48

Business Combinations

12 Months Ended

Dec. 31, 2015

Business Combinations [Abstract]

Business Combinations

During the year ended December 31, 2015, the Company acquired the assets and assumed certain liabilities of thirteen insurance intermediaries and four books of business (customer accounts). Additionally, miscellaneous adjustments were recorded to the purchase price allocation of certain prior acquisitions completed within the last twelve months as permitted by Accounting Standards Codification Topic 805 — Business Combinations (“ASC 805”). Such adjustments are presented in the “Other” category within the following two tables. All of these businesses were acquired primarily to expand Brown & Brown’s core business and to attract and hire high-quality individuals. The recorded purchase price for all acquisitions consummated after January 1, 2009 included an estimation of the fair value of liabilities associated with any potential earn-out provisions. Subsequent changes in the fair value of earn-out obligations will be recorded in the Consolidated Statement of Income when incurred.

The fair value of earn-out obligations is based on the present value of the expected future payments to be made to the sellers of the acquired businesses in accordance with the provisions outlined in the respective purchase agreements. In determining fair value, the acquired business’s future performance is estimated using financial projections developed by management for the acquired business and reflects market participant assumptions regarding revenue growth and/or profitability. The expected future payments are estimated on the basis of the earn-out formula and performance targets specified in each purchase agreement compared to the associated financial projections. These payments are then discounted to present value using a risk-adjusted rate that takes into consideration the likelihood that the forecasted earn-out payments will be made.

Based on the acquisition date and the complexity of the underlying valuation work, certain amounts included in the Company’s Consolidated Financial Statements may be provisional and thus subject to further adjustments within the permitted measurement period, as defined in ASC 805. For the year ended December 31, 2015, several adjustments were made within the permitted measurement period that resulted in a decrease in the aggregate purchase price of the affected acquisitions of $503,442 relating to the assumption of certain liabilities.

Cash paid for acquisitions was $136.0 million and $721.9 million in the twelve-month periods ended December 31, 2015 and 2014, respectively. We completed thirteen acquisitions (excluding book of business purchases) in the twelve-month period ended December 31, 2015. We completed ten acquisitions (excluding book of business purchases) in the twelve-month period ended December 31, 2014.

The following table summarizes the purchase price allocation made as of the date of each acquisition for current year acquisitions and significant adjustments made during the measurement period for prior year acquisitions:



(in thousands)
Name	Business Segment	Effective Date of Acquisition	Cash Paid		Other Payable		Recorded Earn-Out Payable		Net Assets Acquired		Maximum Potential Earn- Out Payable
Liberty Insurance Brokers, Inc. and Affiliates (Liberty)	Retail	February 1, 2015	$	12,000	$	—	$	2,981	$	14,981	$	3,750
Spain Agency, Inc. (Spain)	Retail	March 1, 2015	20,706		—		2,617		23,323		9,162
Bellingham Underwriters, Inc. (Bellingham)	National Programs	May 1, 2015	9,007		500		3,322		12,829		4,400
Fitness Insurance, LLC (Fitness)	Retail	June 1, 2015	9,455		—		2,379		11,834		3,500
Strategic Benefit Advisors, Inc. (SBA)	Retail	June 1, 2015	49,600		400		13,587		63,587		26,000
Bentrust Financial, Inc. (Bentrust)	Retail	December 1, 2015	10,142		391		319		10,852		2,200
MBA Insurance Agency of Arizona, Inc. (MBA)	Retail	December 1, 2015	68		8,442		6,063		14,573		9,500
Smith Insurance, Inc. (Smith)	Retail	December 1, 2015	12,096		200		1,047		13,343		6,350
Other	Various	Various	12,926		95		4,584		17,605		8,212
Total			$	136,000	$	10,028	$	36,899	$	182,927	$	73,074

The following table summarizes the estimated fair values of the aggregate assets and liabilities acquired as of the date of each acquisition. The data included in the ‘Other’ column shows a negative adjustment for purchased customer accounts. This is driven mainly by the final valuation adjustment for the acquisition of Wright.



(in thousands)	Liberty			Spain			Bellingham			Fitness			SBA		Bentrust			MBA			Smith			Other			Total
Other current assets	$	2,486		$	324		$	—		$	9		$	652	$	—		$	—		$	—		$	169		$	3,640
Fixed assets	40			50			25			17			41		36			33			73			59			374
Goodwill	10,010			15,748			9,608			8,105			39,859		8,166			13,471			10,374			21,040			136,381
Purchased customer accounts	4,506			7,430			3,223			3,715			23,000		2,789			7,338			3,526			(2,135		)	53,392
Non-compete agreements	24			21			21			—			21		43			11			31			156			328
Other assets	—			—			—			—			14		—			—			—			—			14
Total assets acquired	17,066			23,573			12,877			11,846			63,587		11,034			20,853			14,004			19,289			194,129
Other current liabilities	(42		)	(250		)	(48		)	(12		)	—		(182		)	(6,280		)	(504		)	(4,895		)	(12,213		)
Deferred income tax, net	—			—			—			—			—		—			—			—			2,576			2,576
Other liabilities	(2,043		)	—			—			—			—		—			—			(157		)	635			(1,565		)
Total liabilities assumed	(2,085		)	(250		)	(48		)	(12		)	—		(182		)	(6,280		)	(661		)	(1,684		)	(11,202		)
Net assets acquired	$	14,981		$	23,323		$	12,829		$	11,834		$	63,587	$	10,852		$	14,573		$	13,343		$	17,605		$	182,927

The weighted average useful lives for the acquired amortizable intangible assets are as follows: purchased customer accounts, 15 years; and non-compete agreements, 5 years.

Goodwill of $136.4 million was allocated to the Retail, National Programs and Wholesale Brokerage Segments in the amounts of $113.8 million, $18.0 million and $4.6 million, respectively. Of the total goodwill of $136.4 million, $91.1 million is currently deductible for income tax purposes and $8.4 million is non-deductible. The remaining $36.9 million relates to the recorded earn-out payables and will not be deductible until it is earned and paid.

For the acquisitions completed during 2015, the results of operations since the acquisition dates have been combined with those of the Company. The total revenues from the acquisitions completed through December 31, 2015, included in the Consolidated Statement of Income for the year ended December 31, 2015, were $28.2 million. The income before income taxes, including the inter-company cost of capital charge, from the acquisitions completed through December 31, 2015, included in the Consolidated Statement of Income for the year ended December 31, 2015, was $1.5 million. If the acquisitions had occurred as of the beginning of the respective periods, the Company’s results of operations would be as shown in the following table. These unaudited pro forma results are not necessarily indicative of the actual results of operations that would have occurred had the acquisitions actually been made at the beginning of the respective periods.



(UNAUDITED)	For the Year Ended December 31,
(in thousands, except per share data)	2015		2014
Total revenues	$	1,688,297	$	1,630,992
Income before income taxes	$	411,497	$	356,426
Net income	$	248,720	$	217,053
Net income per share:
Basic	$	1.76	$	1.50
Diluted	$	1.73	$	1.48
Weighted average number of shares outstanding:
Basic	137,810		140,944
Diluted	140,112		142,891

Acquisitions in 2014

During the year ended December 31, 2014, Brown & Brown acquired the assets and assumed certain liabilities of nine insurance intermediaries, all of the stock of one insurance intermediary that owns an insurance carrier and five books of business (customer accounts). The cash paid for these acquisitions was $721.9 million. Additionally, miscellaneous adjustments were recorded to the purchase price allocation of certain prior acquisitions completed within the last twelve months as permitted by Accounting Standards Codification Topic 805 — Business Combinations (“ASC 805”). Such adjustments are presented in the “Other” category within the following two tables. All of these acquisitions were acquired primarily to expand Brown & Brown’s core business and to attract and hire high-quality individuals.

For the year ended December 31, 2014, several adjustments were made within the permitted measurement period that resulted in a decrease in the aggregate purchase price of the affected acquisitions of $25,941 relating to the assumption of certain liabilities.

The following table summarizes the purchase price allocation made as of the date of each acquisition for current year acquisitions and significant adjustment made during the measurement period for prior year acquisitions:



(in thousands)
Name	Business Segment	Effective Date of Acquisition	Cash Paid		Other Payable		Recorded Earn-Out Payable		Net Assets Acquired		Maximum Potential Earn- Out Payable
The Wright Insurance Group, LLC	National Programs	May 1, 2014	$	609,183	$	1,471	$	—	$	610,654	$	—
Pacific Resources Benefits Advisors, LLC ("PacRes")	Retail	May 1, 2014	90,000		—		27,452		117,452		35,000
Axia Strategies, Inc ("Axia")	Wholesale Brokerage	May 1, 2014	9,870		—		1,824		11,694		5,200
Other	Various	Various	12,798		433		3,953		17,184		9,262
Total			$	721,851	$	1,904	$	33,229	$	756,984	$	49,462

The following table summarizes the estimated fair values of the aggregate assets and liabilities acquired as of the date of each acquisition.



(in thousands)	Wright			PacRes			Axia		Other			Total
Cash	$	25,365		$	—		$	—	$	—		$	25,365
Other current assets	16,474			3,647			101		742			20,964
Fixed assets	7,172			53			24		1,724			8,973
Reinsurance recoverable	25,238			—			—		—			25,238
Prepaid reinsurance premiums	289,013			—			—		—			289,013
Goodwill	420,209			76,023			7,276		10,417			513,925
Purchased customer accounts	213,677			38,111			4,252		4,384			260,424
Non-compete agreements	966			21			41		166			1,194
Other assets	20,045			—			—		—			20,045
Total assets acquired	1,018,159			117,855			11,694		17,433			1,165,141
Other current liabilities	(14,322		)	(403		)	—		(249		)	(14,974		)
Losses and loss adjustment reserve	(25,238		)	—			—		—			(25,238		)
Unearned premiums	(289,013		)	—			—		—			(289,013		)
Deferred income tax, net	(46,566		)	—			—		—			(46,566		)
Other liabilities	(32,366		)	—			—		—			(32,366		)
Total liabilities assumed	(407,505		)	(403		)	—		(249		)	(408,157		)
Net assets acquired	$	610,654		$	117,452		$	11,694	$	17,184		$	756,984

The weighted average useful lives for the acquired amortizable intangible assets are as follows: purchased customer accounts, 15 years; and non-compete agreements, 3.4 years.

Goodwill of $513.9 million was allocated to the Retail, National Programs, Wholesale Brokerage and Services Segments in the amounts of $86.4 million, $420.0 million, $7.7 million and $(0.2) million, respectively. Of the total goodwill of $513.9 million, $141.9 million is currently deductible for income tax purposes and $338.8 million is non-deductible. The remaining $33.2 million relates to the recorded earn-out payables and will not be deductible until it is earned and paid.

For the acquisitions completed during 2014, the results of operations since the acquisition dates have been combined with those of the Company. The total revenues and income before income taxes, including the inter-company cost of capital, from the acquisitions completed through December 31, 2014, included in the Consolidated Statement of Income for the year ended December 31, 2014, were $112.2 million and $(1.3) million, respectively. If the acquisitions had occurred as of the beginning of the respective periods, the Company’s results of operations would be as shown in the following table. These unaudited pro forma results are not necessarily indicative of the actual results of operations that would have occurred had the acquisitions actually been made at the beginning of the respective periods.



(UNAUDITED)	For the Year Ended December 31,
(in thousands, except per share data)	2014		2013
Total revenues	$	1,630,162	$	1,520,858
Income before income taxes	$	358,229	$	409,522
Net income	$	218,150	$	248,628
Net income per share:
Basic	$	1.51	$	1.72
Diluted	$	1.49	$	1.70
Weighted average number of shares outstanding:
Basic	140,944		141,033
Diluted	142,891		142,624

Acquisitions in 2013

During the year ended December 31, 2013, Brown & Brown acquired the assets and assumed certain liabilities of eight insurance intermediaries, all of the stock of one insurance intermediary and one book of business (customer accounts). The cash paid for these acquisitions was $408.1 million. Additionally, miscellaneous adjustments were recorded to the purchase price allocation of certain prior acquisitions completed within the last twelve months as permitted by Accounting Standards Codification Topic 805 — Business Combinations (“ASC 805”). Such adjustments are presented in the “Other” category within the following two tables. All of these acquisitions were acquired primarily to expand Brown & Brown’s core business and to attract and hire high-quality individuals.

For the year ended December 31, 2013, several adjustments were made within the permitted measurement period that resulted in a decrease in the aggregate purchase price of the affected acquisitions of $504,300 relating to the assumption of certain liabilities.

The following table summarizes the aggregate purchase price allocation made as of the date of each acquisition for current year acquisitions and adjustment made during the measurement period for prior year acquisitions:



(in thousands)
Name	Business Segment	Effective Date of Acquisition	Cash Paid		Other Payable		Recorded Earn-Out Payable		Net Assets Acquired		Maximum Potential Earn- Out Payable
The Rollins Agency, Inc.	Retail	June 1, 2013	$	13,792	$	50	$	2,321	$	16,163	$	4,300
Beecher Carlson Holdings, Inc.	Retail; National Programs	July 1, 2013	364,256		—		—		364,256		—
ICA, Inc.	Services	December 31, 2013	19,770		—		727		20,497		5,000
Other	Various	Various	10,254		502		2,043		12,799		7,468
Total			$	408,072	$	552	$	5,091	$	413,715	$	16,768

The following table summarizes the estimated fair values of the aggregate assets and liabilities acquired as of the date of each acquisition.



(in thousands)	Rollins			Beecher			ICA		Other			Total
Cash	$	—		$	40,360		$	—	$	—		$	40,360
Other current assets	393			57,632			—		1,573			59,598
Fixed assets	30			1,786			75		24			1,915
Goodwill	12,697			265,174			12,377		5,696			295,944
Purchased customer accounts	3,878			101,565			7,917		5,623			118,983
Non-compete agreements	31			2,758			21		76			2,886
Other assets	—			—			107		1			108
Total assets acquired	17,029			469,275			20,497		12,993			519,794
Other current liabilities	(866		)	(80,090		)	—		(194		)	(81,150		)
Deferred income tax, net	—			(22,764		)	—		—			(22,764		)
Other liabilities	—			(2,165		)	—		—			(2,165		)
Total liabilities assumed	(866		)	(105,019		)	—		(194		)	(106,079		)
Net assets acquired	$	16,163		$	364,256		$	20,497	$	12,799		$	413,715

The weighted average useful lives for the acquired amortizable intangible assets are as follows: purchased customer accounts, 15 years; and non-compete agreements, 5 years.

Goodwill of $295.9 million was allocated to the Retail, National Programs, Wholesale Brokerage and Services Segments in the amounts of $257.2 million, $27.1 million, $(0.8) million and $12.4 million, respectively. Of the total goodwill of $295.9 million, $41.6 million is currently deductible for income tax purposes and $249.2 million is non-deductible. The remaining $5.1 million relates to the recorded earn-out payables and will not be deductible until it is earned and paid.

For the acquisitions completed during 2013, the results of operations since the acquisition dates have been combined with those of the Company. The total revenues and income before income taxes, including the inter-company cost of capital, from the acquisitions completed through December 31, 2013, included in the Consolidated Statement of Income for the year ended December 31, 2013, were $63.8 million and $0.9 million, respectively. If the acquisitions had occurred as of the beginning of the respective periods, the Company’s results of operations would be as shown in the following table. These unaudited pro forma results are not necessarily indicative of the actual results of operations that would have occurred had the acquisitions actually been made at the beginning of the respective periods.



(UNAUDITED)	For the Year Ended December 31,
(in thousands, except per share data)	2013		2012
Total revenues	$	1,439,918	$	1,329,262
Income before income taxes	$	373,175	$	329,291
Net income	$	226,562	$	198,826
Net income per share:
Basic	$	1.57	$	1.39
Diluted	$	1.55	$	1.36
Weighted average number of shares outstanding:
Basic	141,033		139,634
Diluted	142,624		142,010

For acquisitions consummated prior to January 1, 2009, additional consideration paid to sellers as a result of the purchase price earn-out provisions are recorded as adjustments to intangible assets when the contingencies are settled. The net additional consideration paid by the Company in 2015 as a result of those adjustments totaled $0. The net additional consideration paid by the Company in 2014 as a result of these adjustments totaled $26,000, all of which was allocated to goodwill. Of the $26,000 net additional consideration paid, $26,000 was recorded in other payables.

As of December 31, 2015, the maximum future contingency payments related to all acquisitions totaled $137.4 million, all of which relates to acquisitions consummated subsequent to January 1, 2009.

ASC Topic 805-Business Combinations is the authoritative guidance requiring an acquirer to recognize 100% of the fair values of acquired assets, including goodwill, and assumed liabilities (with only limited exceptions) upon initially obtaining control of an acquired entity. Additionally, the fair value of contingent consideration arrangements (such as earn-out purchase arrangements) at the acquisition date must be included in the purchase price consideration. As a result, the recorded purchase prices for all acquisitions consummated after January 1, 2009 include an estimation of the fair value of liabilities associated with any potential earn-out provisions. Subsequent changes in these earn-out obligations will be recorded in the Consolidated Statement of Income when incurred. Potential earn-out obligations are typically based upon future earnings of the acquired entities, usually between one and three years.

As of December 31, 2015, the fair values of the estimated acquisition earn-out payables were re-evaluated and measured at fair value on a recurring basis using unobservable inputs (Level 3) as defined in ASC 820-Fair Value Measurement. The resulting additions, payments, and net changes, as well as the interest expense accretion on the estimated acquisition earn-out payables, for the years ended December 31, 2015, 2014 and 2013 were as follows:



	For the Year Ended December 31,
(in thousands)	2015			2014			2013
Balance as of the beginning of the period	$	75,283		$	43,058		$	52,987
Additions to estimated acquisition earn-out payables	36,899			34,356			5,816
Payments for estimated acquisition earn-out payables	(36,798		)	(12,069		)	(18,278		)
Subtotal	75,384			65,345			40,525
Net change in earnings from estimated acquisition earn-out payables:
Change in fair value on estimated acquisition earn-out payables	2,990			7,375			570
Interest expense accretion	13			2,563			1,963
Net change in earnings from estimated acquisition earn-out payables	3,003			9,938			2,533
Balance as of December 31,	$	78,387		$	75,283		$	43,058

Of the $78.4 million estimated acquisition earn-out payables as of December 31, 2015, $25.3 million was recorded as accounts payable and $53.1 million was recorded as other non-current liabilities. Included within additions to estimated acquisition earn-out payables are any adjustments to opening balance sheet items prior to the one-year anniversary date and may therefore differ from previously reported amounts. Of the $75.3 million estimated acquisition earn-out payables as of December 31, 2014, $26.0 million was recorded as accounts payable and $49.3 million was recorded as an other non-current liability. Of the $43.1 million estimated acquisition earn-out payables as of December 31, 2013, $6.3 million was recorded as accounts payable and $36.8 million was recorded as an other non-current liability.

- Definition

The entire disclosure for a business combination (or series of individually immaterial business combinations) completed during the period, including background, timing, and recognized assets and liabilities. The disclosure may include leverage buyout transactions (as applicable).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=25497992&loc=d3e1497-128463

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 4
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Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
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Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 5: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 7: http://www.xbrl.org/2003/role/presentationRef
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-Publisher FASB
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Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-Publisher FASB
-Name Accounting Standards Codification
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Reference 13: http://www.xbrl.org/2003/role/presentationRef
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Reference 14: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 15: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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+ Details

Goodwill

12 Months Ended

Dec. 31, 2015

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill

The changes in the carrying value of goodwill by reportable segment for the years ended December 31, are as follows:



(in thousands)	Retail			National Programs			Wholesale Brokerage			Services			Total
Balance as of January 1, 2014	$	1,141,485		$	475,596		$	268,562		$	120,530		$	2,006,173
Goodwill of acquired businesses	94,080			420,063			47			(239		)	513,951
Goodwill disposed of relating to sales of businesses	(3,696		)	(9,564		)	(46,253		)	—			(59,513		)
Balance as of December 31, 2014	$	1,231,869		$	886,095		$	222,356		$	120,291		$	2,460,611
Goodwill of acquired businesses	113,767			18,009			4,605			—			136,381
Goodwill disposed of relating to sales of businesses	—			(2,238		)	—			(8,071		)	(10,309		)
Balance as of December 31, 2015	$	1,345,636		$	901,866		$	226,961		$	112,220		$	2,586,683

- Definition

The entire disclosure for the aggregate amount of goodwill and a description of intangible assets, which may include (a) for amortizable intangible assets (also referred to as finite-lived intangible assets), the carrying amount, the amount of any significant residual value, and the weighted-average amortization period, (b) for intangible assets not subject to amortization (also referred to as indefinite-lived intangible assets), the carrying amount, and (c) the amount of research and development assets acquired and written off in the period, including the line item in the income statement in which the amounts written off are aggregated, if not readily apparent from the income statement. Also discloses (a) for amortizable intangibles assets in total and by major class, the gross carrying amount and accumulated amortization, the total amortization expense for the period, and the estimated aggregate amortization expense for each of the five succeeding fiscal years, (b) for intangible assets not subject to amortization the carrying amount in total and by major class, and (c) for goodwill, in total and for each reportable segment, the changes in the carrying amount of goodwill during the period (including the aggregate amount of goodwill acquired, the aggregate amount of impairment losses recognized, and the amount of goodwill included in the gain (loss) on disposal of a reporting unit). If any part of goodwill has not been allocated to a reportable segment, discloses the unallocated amount and the reasons for not allocating. For each impairment loss recognized related to an intangible asset (excluding goodwill), discloses: (a) a description of the impaired intangible asset and the facts and circumstances leading to the impairment, (b) the amount of the impairment loss and the method for determining fair value, (c) the caption in the income statement or the statement of activities in which the impairment loss is aggregated, and (d) the segment in which the impaired intangible asset is reported. For each goodwill impairment loss recognized, discloses: (a) a description of the facts and circumstances leading to the impairment, (b) the amount of the impairment loss and the method of determining the fair value of the associated reporting unit, and (c) if a recognized impairment loss is an estimate not finalized and the reasons why the estimate is not final. May also disclose the nature and amount of any significant adjustments made to a previous estimate of an impairment loss.

+ References + Details

Amortizable Intangible Assets

12 Months Ended

Dec. 31, 2015

Goodwill and Intangible Assets Disclosure [Abstract]

Amortizable Intangible Assets

Amortizable intangible assets at December 31, 2015 and 2014 consisted of the following:



	December 31, 2015								December 31, 2014
(in thousands)	Gross Carrying Value		Accumulated Amortization			Net Carrying Value		Weighted Average Life (Years)(1)	Gross Carrying Value		Accumulated Amortization			Net Carrying Value		Weighted Average Life (Years)(1)
Purchased customer accounts	$	1,398,986	$	(656,799	)	$	742,187	15.0	$	1,355,550	$	(574,285	)	$	781,265	14.9
Non-compete agreements	29,440		(26,947		)	2,493		6.8	29,139		(25,762		)	3,377		6.8
Total	$	1,428,426	$	(683,746	)	$	744,680		$	1,384,689	$	(600,047	)	$	784,642


(1)	Weighted average life calculated as of the date of acquisition.

Amortization expense for amortizable intangible assets for the years ending December 31, 2016, 2017, 2018, 2019 and 2020 is estimated to be $84.5 million, $81.6 million, $76.3 million, $71.8 million, and $64.5 million, respectively.

Investments

12 Months Ended

Dec. 31, 2015

Investments, Debt and Equity Securities [Abstract]

Investments

At December 31, 2015, the Company’s amortized cost and fair values of fixed maturity securities are summarized as follows:



(in thousands)	Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
U.S. Treasury securities, obligations of U.S. Government agencies and Municipals	$	11,876	$	6	$	(26	)	$	11,856
Foreign government	50		—		—			50
Corporate debt	4,505		7		(16		)	4,496
Short duration fixed income fund	1,663		27		—			1,690
Total	$	18,094	$	40	$	(42	)	$	18,092

For securities in a loss position, the following table shows the investments’ gross unrealized loss and fair value, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position as of December 31, 2015:



(in thousands)	Less than 12 Months				12 Months or More				Total
	Fair Value		Unrealized Losses		Fair Value		Unrealized Losses		Fair Value		Unrealized Losses
U.S. Treasury securities, obligations of U.S. Government agencies and Municipals	$	8,998	$	26	$	—	$	—	$	8,998	$	26
Foreign Government	50		—		—		—		50		—
Corporate debt	2,731		14		284		2		3,015		16
Total	$	11,779	$	40	$	284	$	2	$	12,063	$	42

The unrealized losses from corporate issuers were caused by interest rate increases. At December 31, 2015, the Company had 35 securities in an unrealized loss position. The corporate securities are highly rated securities with no indicators of potential impairment. Based on the ability and intent of the Company to hold these investments until recovery of fair value, which may be maturity, the bonds were not considered to be other-than-temporarily impaired at December 31, 2015.

At December 31, 2014, the Company’s amortized cost and fair values of fixed maturity securities are summarized as follows:



(in thousands)	Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
U.S. Treasury securities, obligations of U.S. Government agencies and Municipals	$	10,774	$	7	$	(1	)	$	10,780
Foreign government	50		—		—			50
Corporate debt	5,854		9		(11		)	5,852
Short duration fixed income fund	3,143		37		—			3,180
Total	$	19,821	$	53	$	(12	)	$	19,862

The following table shows the investments’ gross unrealized loss and fair value, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position as of December 31, 2014:



(in thousands)	Less than 12 Months				12 Months or More				Total
	Fair Value		Unrealized Losses		Fair Value		Unrealized Losses		Fair Value		Unrealized Losses
U.S. Treasury securities, obligations of U.S. Government agencies and Municipals	$	3,994	$	1	$	—	$	—	$	3,994	$	1
Foreign Government	50		—		—		—		50		—
Corporate debt	4,439		11		—		—		4,439		11
Total	$	8,483	$	12	$	—	$	—	$	8,483	$	12

The unrealized losses in the Company’s investments in U.S. Treasury Securities and obligations of U.S. Government Agencies and bonds from corporate issuers were caused by interest rate increases. At December 31, 2014, the Company had 38 securities in an unrealized loss position. The contractual cash flows of the U.S. Treasury Securities and obligations of the U.S. Government agencies investments are either guaranteed by the U.S. Government or an agency of the U.S. Government. Accordingly, it is expected that the securities would not be settled at a price less than the amortized cost of the Company’s investment. The corporate securities are highly rated securities with no indicators of potential impairment. Based on the ability and intent of the Company to hold these investments until recovery of fair value, which may be maturity, the bonds were not considered to be other-than-temporarily impaired at December 31, 2014.

The amortized cost and estimated fair value of the fixed maturity securities at December 31, 2015 by contractual maturity are set forth below:



(in thousands)	Amortized Cost		Fair Value
Years to maturity:
Due in one year or less	$	5,726	$	5,722
Due after one year through five years	12,038		12,041
Due after five years through ten years	330		329
Total	$	18,094	$	18,092

The amortized cost and estimated fair value of the fixed maturity securities at December 31, 2014 by contractual maturity are set forth below:



(in thousands)	Amortized Cost		Fair Value
Years to maturity:
Due in one year or less	$	5,628	$	5,628
Due after one year through five years	13,863		13,897
Due after five years through ten years	330		337
Total	$	19,821	$	19,862

The expected maturities in the foregoing table may differ from the contractual maturities because certain borrowers have the right to call or prepay obligations with or without penalty.

Proceeds from sales of the Company’s investment in fixed maturity securities were $5.6 million including maturities for the year ended December 31, 2015. The gains and losses realized on those sales for the year ended December 31, 2015 were insignificant.

Proceeds from sales of the Company’s investment in fixed maturity securities were $0.2 million including maturities for the year ended December 31, 2014. There were no gains and losses realized on those sales for the year ended to December 31, 2014.

Realized gains and losses are reported on the Consolidated Statement of Income, with the cost of securities sold determined on a specific identification basis.

At December 31, 2015, investments with a fair value of approximately $4.0 million were on deposit with state insurance departments to satisfy regulatory requirements.

- Definition

The entire disclosure for investments in certain debt and equity securities.

+ References + Details

Fixed Assets (Notes)

12 Months Ended

Dec. 31, 2015

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment Disclosure [Text Block]

Fixed Assets

Fixed assets at December 31 consisted of the following:



(in thousands)	2015			2014
Furniture, fixtures and equipment	$	169,682		$	161,539
Leasehold improvements	32,132			30,030
Land, buildings and improvements	3,370			3,739
Total cost	205,184			195,308
Less accumulated depreciation and amortization	(123,431		)	(110,640		)
Total	$	81,753		$	84,668

Depreciation and amortization expense for fixed assets amounted to $20.9 million in 2015, $20.9 million in 2014, and $17.5 million in 2013.

Long-Term Debt

12 Months Ended

Dec. 31, 2015

Debt Disclosure [Abstract]

Long-Term Debt

Long-term debt at December 31, 2015 and 2014 consisted of the following:



(in thousands)	December 31, 2015		December 31, 2014
Current portion of long-term debt:
Current portion of 5-year term loan facility expires 2019	$	48,125	$	20,625
5.370% senior notes, Series D, quarterly interest payments, balloon due 2015	—		25,000
5.660% senior notes, Series C, semi-annual interest payments, balloon due 2016	25,000		—
Total current portion of long-term debt	73,125		45,625
Long-term debt:
Note agreements:
5.660% senior notes, Series C, semi-annual interest payments, balloon due 2016	—		25,000
4.500% senior notes, Series E, quarterly interest payments, balloon due 2018	100,000		100,000
4.200% senior notes, semi-annual interest payments, balloon due 2024	498,628		498,471
Total notes	598,628		623,471
Credit agreements:
5-year term-loan facility, periodic interest and principal payments, currently LIBOR plus up to 1.75%, expires May 20, 2019	481,250		529,375
5-year revolving-loan facility, periodic interest payments, currently LIBOR plus up to 1.50%, plus commitment fees up to 0.25%, expires May 20, 2019	—		—
Revolving credit loan, quarterly interest payments, LIBOR plus up to 1.40% and availability fee up to 0.25%, expires December 31, 2016	—		—
Total credit agreements	481,250		529,375
Total long-term debt	1,079,878		1,152,846
Current portion of long-term debt	73,125		45,625
Total debt	$	1,153,003	$	1,198,471

On December 22, 2006, the Company entered into a Master Shelf and Note Purchase Agreement (the “Master Agreement”) with a national insurance company (the “Purchaser”). The initial issuance of notes under the Master Agreement occurred on December 22, 2006, through the issuance of $25.0 million in Series C Senior Notes due December 22, 2016, with a fixed interest rate of 5.66% per year. On February 1, 2008, $25.0 million in Series D Senior Notes due January 15, 2015, with a fixed interest rate of 5.37% per year, were issued. On September 15, 2011, and pursuant to a Confirmation of Acceptance (the “Confirmation”), dated January 21, 2011, in connection with the Master Agreement, $100.0 million in Series E Senior Notes were issued and are due September 15, 2018, with a fixed interest rate of 4.50% per year. The Series E Senior Notes were issued for the sole purpose of retiring existing senior notes. On January 15, 2015, the Series D Notes were redeemed at maturity using cash proceeds to pay off the principal of $25.0 million plus any remaining accrued interest. As of December 31, 2015, there was an outstanding debt balance issued under the provisions of the Master Agreement of $125.0 million.

On July 1, 2013, in conjunction with the acquisition of Beecher Carlson Holdings, Inc., the Company entered into a revolving loan agreement (the “Wells Fargo Agreement”) with Wells Fargo Bank, N.A. that provided for a $50.0 million revolving line of credit (the “Wells Fargo Revolver”). The maturity date for the Wells Fargo Revolver is December 31, 2016, at which time all outstanding principal and unpaid interest will be due. On April 16, 2014, in connection with the signing of the Credit Facility (as defined below) an amendment to the agreement was established to reduce the total revolving loan commitment from $50.0 million to $25.0 million. The Wells Fargo Revolver may be increased by up to $50.0 million (bringing the total amount available to $75.0 million). The calculation of interest and fees for the Wells Fargo Agreement is generally based on the Company’s funded debt-to-EBITDA ratio. Interest is charged at a rate equal to 1.00% to 1.40% above LIBOR or 1.00% below the Base Rate, each as more fully described in the Wells Fargo Agreement. Fees include an up-front fee, an availability fee of 0.175% to 0.25%, and a letter of credit margin fee of 1.00% to 1.40%. The obligations under the Wells Fargo Revolver are unsecured and the Wells Fargo Agreement includes various covenants, limitations and events of default that are customary for similar facilities for similar borrowers. There were no borrowings against the Wells Fargo Revolver as of December 31, 2015 and 2014.

On April 17, 2014, the Company entered into a credit agreement with JPMorgan Chase Bank, N.A. as administrative agent and certain other banks as co-syndication agents and co-documentation agents (the “Credit Agreement”). The Credit Agreement in the amount of $1,350.0 million provides for an unsecured revolving credit facility (the “Credit Facility”) in the initial amount of $800.0 million and unsecured term loans in the initial amount of $550.0 million, either or both of which may, subject to lenders’ discretion, potentially be increased by up to $500.0 million. The Credit Facility was funded on May 20, 2014 in conjunction with the closing of the Wright acquisition, with the $550.0 million term loan being funded as well as a drawdown of $375.0 million on the revolving loan facility. Use of these proceeds was to retire existing term loan debt and to facilitate the closing of the Wright acquisition as well as other acquisitions. The Credit Facility terminates on May 20, 2019, but either or both of the revolving credit facility and the term loans may be extended for two additional one-year periods at the Company’s request and at the discretion of the respective lenders. Interest and facility fees in respect to the Credit Facility are based on the better of the Company’s net debt leverage ratio or a non-credit enhanced senior unsecured long-term debt rating. Based on the Company’s net debt leverage ratio, the rates of interest charged on the term loan are 1.00% to 1.75%, and the revolving loan is 0.85% to 1.50% above the adjusted LIBOR rate for outstanding amounts drawn. There are fees included in the facility which include a facility fee based on the revolving credit commitments of the lenders (whether used or unused) at a rate of 0.15% to 0.25% and letter of credit fees based on the amounts of outstanding secured or unsecured letters of credit. The Credit Facility includes various covenants, limitations and events of default customary for similar facilities for similarly rated borrowers. As of December 31, 2015 and 2014, there was an outstanding debt balance issued under the provisions of the Credit Facility in total of $529.4 million and $550.0 million respectively, with no borrowings outstanding relative to the revolving loan. Per the terms of the agreement, scheduled principal payments of $48.1 million are due in 2016.

On September 18, 2014, the Company issued $500.0 million of 4.20% unsecured senior notes due in 2024. The senior notes were given investment grade ratings of BBB-/Baa3 with a stable outlook. The notes are subject to certain covenant restrictions and regulations which are customary for credit rated obligations. At the time of funding, the proceeds were offered at a discount of the original note amount which also excluded an underwriting fee discount. The net proceeds received from the issuance were used to repay the outstanding balance of $475.0 million on the revolving Credit Facility and for other general corporate purposes. As of December 31, 2015 and 2014, there was an outstanding debt balance of $500.0 million exclusive of the associated discount balance.

The Master Agreement, Wells Fargo Agreement and the Credit Agreement all require the Company to maintain certain financial ratios and comply with certain other covenants. The Company was in compliance with all such covenants as of December 31, 2015 and 2014.

The 30-day Adjusted LIBOR Rate as of December 31, 2015 was 0.44%.

Interest paid in 2015, 2014 and 2013 was $37.5 million, $25.1 million, and $16.5 million, respectively.

At December 31, 2015, maturities of long-term debt were $73.1 million in 2016, $55.0 million in 2017, $155.0 million in 2018, $371.3 million in 2019 and $500.0 million in 2024.

Income Taxes (Notes)

12 Months Ended

Dec. 31, 2015

Income Tax Disclosure [Abstract]

Income Tax Disclosure [Text Block]

Income Taxes

Significant components of the provision for income taxes for the years ended December 31 are as follows:



(in thousands)	2015		2014			2013
Current:
Federal	$	118,490	$	109,893		$	94,007
State	17,625		15,482			13,438
Foreign	430		109			805
Total current provision	136,545		125,484			108,250
Deferred:
Federal	18,416		5,987			28,469
State	4,280		1,440			3,723
Foreign	—		(58		)	55
Total deferred provision	22,696		7,369			32,247
Total tax provision	$	159,241	$	132,853		$	140,497

A reconciliation of the differences between the effective tax rate and the federal statutory tax rate for the years ended December 31 is as follows:



	2015	2014	2013
Federal statutory tax rate	35.0%	35.0%	35.0%
State income taxes, net of federal income tax benefit	3.9	3.3	3.5
Non-deductible employee stock purchase plan expense	0.3	0.3	0.3
Non-deductible meals and entertainment	0.3	0.4	0.3
Other, net	0.1	0.1	0.2
Effective tax rate	39.6%	39.1%	39.3%

Deferred income taxes reflect the net tax effects of temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the corresponding amounts used for income tax reporting purposes.

Significant components of Brown & Brown’s current deferred tax assets as of December 31 are as follows:



(in thousands)	2015		2014
Current deferred tax assets:
Deferred profit-sharing contingent commissions	$	9,767	$	10,335
Net operating loss carryforwards	10		951
Accruals and reserves	14,858		14,145
Total current deferred tax assets	$	24,635	$	25,431

Significant components of Brown & Brown’s non-current deferred tax liabilities and assets as of December 31 are as follows:



(in thousands)	2015			2014
Non-current deferred tax liabilities:
Fixed assets	$	8,585		$	10,368
Net unrealized holding (loss)/gain on available-for-sale securities	(9		)	56
Intangible assets	393,251			364,938
Total non-current deferred tax liabilities	401,827			375,362
Non-current deferred tax assets:
Deferred compensation	38,966			31,580
Net operating loss carryforwards	2,518			2,796
Valuation allowance for deferred tax assets	(606		)	(511		)
Total non-current deferred tax assets	40,878			33,865
Net non-current deferred tax liability	$	360,949		$	341,497

Income taxes paid in 2015, 2014 and 2013 were $132.9 million, $118.3 million, and $110.2 million respectively.

At December 31, 2015, Brown & Brown had net operating loss carryforwards of $184,218 and $61,217,003 for federal and state income tax reporting purposes, respectively, portions of which expire in the years 2016 through 2034. The federal carryforward is derived from insurance operations acquired by Brown & Brown in 2001. The state carryforward amount is derived from the operating results of certain subsidiaries and from the 2013 stock acquisition Beecher Carlson Holdings, Inc.

A reconciliation of the beginning and ending amount of unrecognized tax benefits is as follows:



(in thousands)	2015			2014			2013
Unrecognized tax benefits balance at January 1	$	113		$	391		$	294
Gross increases for tax positions of prior years	773			—			232
Gross decreases for tax positions of prior years	—			(21		)	—
Settlements	(302		)	(257		)	(135		)
Unrecognized tax benefits balance at December 31	$	584		$	113		$	391

The Company recognizes interest and penalties related to uncertain tax positions in income tax expense. As of December 31, 2015 and 2014, the Company had $102,171 and $65,772 of accrued interest and penalties related to uncertain tax positions, respectively.

The total amount of unrecognized tax benefits that would affect the Company’s effective tax rate if recognized was $583,977 as of December 31, 2015 and $113,032 as of December 31, 2014. The Company does not expect its unrecognized tax benefits to change significantly over the next 12 months.

As a result of a 2006 Internal Revenue Service (“IRS”) audit, the Company agreed to accrue at each December 31, for tax purposes only, a known amount of profit-sharing contingent commissions represented by the actual amount of profit-sharing contingent commissions received in the first quarter of the related year, with a true-up adjustment to the actual amount received by the end of the following March. Since this method for tax purposes differs from the method used for book purposes, it will result in a current deferred tax asset as of December 31 each year which will reverse by the following March 31 when the related profit-sharing contingent commissions are recognized for financial accounting purposes.

The Company is subject to taxation in the United States and various state jurisdictions. The Company is also subject to taxation in the United Kingdom. In the United States, federal returns for fiscal years 2012 through 2015 remain open and subject to examination by the IRS. The Company files and remits state income taxes in various states where the Company has determined it is required to file state income taxes. The Company’s filings with those states remain open for audit for the fiscal years 2010 through 2015. In the United Kingdom, the Company’s filings remain open for audit for the fiscal years 2014 and 2015.

The federal income tax returns of The Wright Insurance Group are currently under IRS audit for the year ended December 31, 2013 and the short period ended May 1, 2014. Also during 2015, the previously disclosed 2013 IRS audit of Beecher Carlson Holding, Inc. was closed with no adjustments. The Company’s 2009 through 2012 State of Oregon tax returns were under audit in 2014. The audit was settled in early 2015 with the State of Oregon for an insignificant amount. The Company is currently under audit in the State of Kansas for fiscal years 2012 through 2014. There are no other federal or state income tax audits as of December 31, 2015.

Stock Based Compensation (Notes) - shares

12 Months Ended

Dec. 31, 2015

Dec. 31, 2012

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant

Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross

5,266,707

Disclosure of Compensation Related Costs, Share-based Payments [Text Block]

Stock-Based Compensation

Performance Stock Plan

In 1996, Brown & Brown adopted and the shareholders approved a performance stock plan, under which until the suspension of the plan in 2010, up to 14,400,000 Performance Stock Plan (“PSP”) shares could be granted to key employees contingent on the employees’ future years of service with Brown & Brown and other performance-based criteria established by the Compensation Committee of the Company’s Board of Directors. Before participants may take full title to Performance Stock, two vesting conditions must be met. Of the grants currently outstanding, specified portions will satisfy the first condition for vesting based on 20% incremental increases in the 20-trading-day average stock price of Brown & Brown’s common stock from the price on the business day prior to date of grant. Performance Stock that has satisfied the first vesting condition is considered “awarded shares.” Awarded shares are included as issued and outstanding common stock shares and are included in the calculation of basic and diluted EPS. Dividends are paid on awarded shares and participants may exercise voting privileges on such shares. Awarded shares satisfy the second condition for vesting on the earlier of a participant’s: (i) 15 years of continuous employment with Brown & Brown from the date shares are granted to the participants (or, in the case of the July 2009 grant to Powell Brown, 20 years); (ii) attainment of age 64 (on a prorated basis corresponding to the number of years since the date of grant); or (iii) death or disability. On April 28, 2010, the PSP was suspended and any remaining authorized, but unissued shares, as well as any shares forfeited in the future, will be reserved for issuance under the 2010 Stock Incentive Plan (the “SIP”).

At December 31, 2015, 5,266,707 shares had been granted under the PSP. As of December 31, 2015, 8,000 shares had not met the first condition for vesting, 1,594,214 shares had met the first condition of vesting and had been awarded, and 3,664,493 shares had satisfied both conditions of vesting and had been distributed to participants. Of the shares that have not vested as of December 31, 2015, the initial stock prices ranged from $8.75 to $25.68.

The Company uses a path-dependent lattice model to estimate the fair value of PSP grants on the grant date.

A summary of PSP activity for the years ended December 31, 2015, 2014 and 2013 is as follows:



	Weighted- Average Grant Date Fair Value		Granted Shares		Awarded Shares		Shares Not Yet Awarded
Outstanding at January 1, 2013	$	8.72	3,691,022		2,394,505		1,296,517
Granted	$	—	—		—		—
Awarded	$	10.25	—		122,021		(122,021	)
Vested	$	4.01	(119,364	)	(119,364	)	—
Forfeited	$	8.73	(1,200,371	)	(101,310	)	(1,099,061	)
Outstanding at December 31, 2013	$	8.62	2,371,287		2,295,852		75,435
Granted	$	—	—		—		—
Awarded	$	—	—		—		—
Vested	$	16.76	(277,009	)	(277,009	)	—
Forfeited	$	9.75	(165,647	)	(115,630	)	(50,017	)
Outstanding at December 31, 2014	$	8.71	1,928,631		1,903,213		25,418
Granted	$	—	—		—		—
Awarded	$	—	—		—		—
Vested	$	5.55	(208,889	)	(208,889	)	—
Forfeited	$	9.78	(117,528	)	(100,110	)	(17,418	)
Outstanding at December 31, 2015	$	9.03	1,602,214		1,594,214		8,000

The total fair value of PSP grants that vested during each of the years ended December 31, 2015, 2014 and 2013 was $6.8 million, $8.4 million and $3.7 million, respectively.

Stock Incentive Plan

On April 28, 2010, the shareholders of Brown & Brown, Inc. approved the Stock Incentive Plan (“SIP”) that provides for the granting of stock options, stock and/or stock appreciation rights to employees and directors contingent on criteria established by the Compensation Committee of the Company’s Board of Directors. The principal purpose of the SIP is to attract, incentivize and retain key employees by offering those persons an opportunity to acquire or increase a direct proprietary interest in the Company’s operations and future success. The SIP includes a sub-plan applicable to Decus Insurance Brokers Limited (“Decus”) which, is a subsidiary of Decus Holdings (U.K.) Limited. The shares of stock reserved for issuance under the SIP are any shares that are authorized for issuance under the PSP and not already subject to grants under the PSP, and that were outstanding as of April 28, 2010, the date of suspension of the PSP, together with PSP shares and SIP shares forfeited after that date. As of April 28, 2010, 6,046,768 shares were available for issuance under the PSP, which were then transferred to the SIP. To date, a substantial majority of stock grants to employees under the SIP vest in four-to-ten years, subject to the achievement of certain performance criteria by grantees, and the achievement of consolidated EPS growth at certain levels by the Company, over three-to-five-year measurement periods.

In 2010, 187,040 shares were granted under the SIP. This grant was conditioned upon the surrender of 187,040 shares previously granted under the PSP in 2009, which were accordingly treated as forfeited PSP shares. The vesting conditions of this grant were identical to those provided for in connection with the 2009 PSP grant; thus the target stock prices and the periods associated with satisfaction of the first and second conditions of vesting were unchanged. Additionally, grants totaling 5,205 shares were made in 2010 to Decus employees under the SIP sub-plan applicable to Decus.

In 2011, 2,375,892 shares were granted under the SIP. Of this total, 24,670 shares were granted to Decus employees under the SIP sub-plan applicable to Decus.

In 2012, 814,545 shares were granted under the SIP, primarily related to the Arrowhead acquisition.

In 2013, 3,719,974 shares were granted under the SIP. Of the shares granted in 2013, 891,399 shares will vest upon the grantees’ completion of between three and seven years of service with the Company, and because grantees have the right to vote the shares and receive dividends immediately after the date of grant these shares are considered awarded and outstanding under the two-class method.

In 2014, 422,572 shares were granted under the SIP. Of the shares granted in 2014, 113,088 shares will vest upon the grantees’ completion of between three and six years of service with the Company, and because grantees have the right to vote the shares and receive dividends immediately after the date of grant these shares are considered awarded and outstanding under the two-class method. As of December 31, 2014, no shares had met the first condition for vesting.

In 2015, 481,166 shares were granted under the SIP. Of the shares granted in 2015, 158,958 shares will vest upon the grantees’ completion of between five and seven years of service with the Company, and because grantees have the right to vote the shares and receive dividends immediately after the date of grant these shares are considered awarded and outstanding under the two-class method. As of December 31, 2015, no shares had met the first condition for vesting.

Additionally, non-employee members of the Board of Directors received shares annually issued pursuant to the SIP as part of their annual compensation. A total of 36,919 SIP shares were issued to these directors in 2011 and 2012, of which 11,682 were issued in January 2011, 12,627 in January 2012, and 12,610 in December 2012. The shares issued in December 2012 were issued at that earlier time rather than in January 2013 pursuant to action of the Board of Directors. No additional shares were granted or issued to the non-employee members of the Board of Directors in 2013. A total of 9,870 shares were issued to these directors in January 2014 and 15,700 shares were issued in January 2015.

At December 31, 2015, 2,793,832 shares were available for future grants.

The Company uses the closing stock price on the day prior to the grant date to determine the fair value of SIP grants and then applies an estimated forfeiture factor to estimate the annual expense. Additionally, the Company uses the path-dependent lattice model to estimate the fair value of grants with PSP-type vesting conditions as of the grant date. SIP shares that satisfied the first vesting condition for PSP-like grants or the established performance criteria are considered awarded shares. Awarded shares are included as issued and outstanding common stock shares and are included in the calculation of basic and diluted EPS.

A summary of SIP activity for the years ended December 31, 2015, 2014 and 2013 is as follows:



	Weighted- Average Grant Date Fair Value		Granted Shares		Awarded Shares		Shares Not Yet Awarded
Outstanding at January 1, 2013	$	22.91	3,157,311		37,408		3,119,903
Granted	$	31.95	3,719,974		—		3,719,974
Awarded	$	30.71	—		966,215		(966,215	)
Vested	$	—	—		—		—
Forfeited	$	23.88	(271,184	)	(7,906	)	(263,278	)
Outstanding at December 31, 2013	$	27.96	6,606,101		995,717		5,610,384
Granted	$	31.02	422,572		113,088		309,484
Awarded	$	—	—		—		—
Vested	$	—	—		—		—
Forfeited	$	27.41	(369,626	)	(47,915	)	(321,711	)
Outstanding at December 31, 2014	$	28.19	6,659,047		1,060,890		5,598,157
Granted	$	31.74	481,166		164,646		316,520
Awarded	$	—	—		—		—
Vested	$	—	—		—		—
Forfeited	$	26.32	(863,241	)	(95,542	)	(767,699	)
Outstanding at December 31, 2015	$	28.74	6,276,972		1,129,994		5,146,978

Employee Stock Purchase Plan

The Company has a shareholder-approved Employee Stock Purchase Plan (“ESPP”) with a total of 17,000,000 authorized shares of which 5,194,928 were available for future subscriptions as of December 31, 2015. Employees of the Company who regularly work more than 20 hours per week are eligible to participate in the ESPP. Participants, through payroll deductions, may allot up to 10% of their compensation, up to a maximum of $25,000, to purchase Company stock between August 1st of each year and the following July 31st (the “Subscription Period”) at a cost of 85% of the lower of the stock price as of the beginning or end of the Subscription Period.

The Company estimates the fair value of an ESPP share option as of the beginning of the Subscription Period as the sum of: (1) 15% of the quoted market price of the Company’s stock on the day prior to the beginning of the Subscription Period, and (2) 85% of the value of a one-year stock option on the Company stock using the Black-Scholes option-pricing model. The estimated fair value of an ESPP share option as of the Subscription Period beginning in August 2015 was $6.43. The fair values of an ESPP share option as of the Subscription Periods beginning in August 2014 and 2013, were $6.39 and $8.36, respectively.

For the ESPP plan years ended July 31, 2015, 2014 and 2013, the Company issued 539,389, 512,521, and 487,672 shares of common stock, respectively. These shares were issued at an aggregate purchase price of $14.4 million, or $26.62 per share, in 2015, $13.4 million, or $26.16 per share, in 2014, and $10.5 million, or $21.44 per share, in 2013.

For the five months ended December 31, 2015, 2014 and 2013 (portions of the 2015-2016, 2014-2015 and 2013-2014 plan years), 231,803; 235,794; and 222,526 shares of common stock (from authorized but unissued shares), respectively, were subscribed to by ESPP participants for proceeds of approximately $6.8 million, $6.3 million and $5.9 million, respectively.

Incentive Stock Option Plan

On April 21, 2000, Brown & Brown adopted, and the shareholders approved, a qualified incentive stock option plan (the “ISOP”) that provides for the granting of stock options to certain key employees for up to 4,800,000 shares of common stock. On December 31, 2008, the ISOP expired. The objective of the ISOP was to provide additional performance incentives to grow Brown & Brown’s pre-tax income in excess of 15% annually. The options were granted at the most recent trading day’s closing market price and vest over a one-to-ten-year period, with a potential acceleration of the vesting period to three-to-six years based upon achievement of certain performance goals. All of the options expire 10 years after the grant date.

The Company uses the Black-Scholes option-pricing model to estimate the fair value of stock options on the grant date. The risk-free interest rate is based upon the U.S. Treasury yield curve on the date of grant with a remaining term approximating the expected term of the option granted. The expected term of the options granted is derived from historical data; grantees are divided into two groups based upon expected exercise behavior and are considered separately for valuation purposes. The expected volatility is based upon the historical volatility of the Company’s common stock over the period of time equivalent to the expected term of the options granted. The dividend yield is based upon the Company’s best estimate of future dividend yield.

A summary of stock option activity for the years ended December 31, 2015, 2014 and 2013 is as follows:



Stock Options	Shares Under Option		Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Term (in years)	Aggregate Intrinsic Value (in thousands)
Outstanding at January 1, 2013	738,792		$	18.39	4.9	$	8,891
Granted	—		$	—
Exercised	(115,847	)	$	17.56
Forfeited	—		$	—
Expired	—		$	—
Outstanding at December 31, 2013	622,945		$	18.55	4.1	$	7,289
Granted	—		$	—
Exercised	(106,589	)	$	18.48
Forfeited	(46,000	)	$	18.48
Expired	—		$	—
Outstanding at December 31, 2014	470,356		$	18.57	3.1	$	5,087
Granted	—		$	—
Exercised	(151,767	)	$	18.48
Forfeited	(49,000	)	$	19.36
Expired	—		$	—
Outstanding at December 31, 2015	269,589		$	18.48	2.2	$	2,395
Ending vested and expected to vest at December 31, 2015	269,589		$	18.48	2.2	$	2,395
Exercisable at December 31, 2015	164,589		$	18.48	2.2	$	2,241
Exercisable at December 31, 2014	316,356		$	18.48	3.2	$	4,565
Exercisable at December 31, 2013	422,945		$	18.48	4.2	$	5,460

The following table summarizes information about stock options outstanding at December 31, 2015:



Options Outstanding					Options Exercisable
Exercise Price	Number Outstanding	Weighted Average Remaining Contractual Life (years)	Weighted Average Exercise Price		Number Exercisable	Weighted Average Exercise Price
$18.48	269,589	2.2	$	18.48	164,589	$	18.48
Totals	269,589	2.2	$	18.48	164,589	$	18.48

The total intrinsic value of options exercised, determined as of the date of exercise, during the years ended December 31, 2015, 2014 and 2013 was $2.2 million, $1.3 million and $1.6 million, respectively. The total intrinsic value is calculated as the difference between the exercise price of all underlying awards and the quoted market price of the Company’s stock for all in-the-money stock options at December 31, 2015, 2014 and 2013, respectively.

There are no option shares available for future grant under the ISOP since this plan expired as of December 31, 2008.

Summary of Non-Cash Stock-Based Compensation Expense

The non-cash stock-based compensation expense for the years ended December 31 is as follows:



(in thousands)	2015		2014		2013
Stock Incentive Plan	$	11,111	$	14,447	$	15,934
Employee Stock Purchase Plan	3,430		2,425		3,538
Performance Stock Plan	972		2,354		2,310
Incentive Stock Option Plan	—		137		821
Total	$	15,513	$	19,363	$	22,603

Summary of Unrecognized Compensation Expense

As of December 31, 2015, there was approximately $115.0 million of unrecognized compensation expense related to all non-vested share-based compensation arrangements granted under the Company’s stock-based compensation plans. That expense is expected to be recognized over a weighted-average period of 5.1 years.

Supplemental Disclosures of Cash Flow Information and Non-Cash Financing and Investing Activities

12 Months Ended

Dec. 31, 2015

Supplemental Cash Flow Elements [Abstract]

Supplemental Disclosures of Cash Flow Information and Non-Cash Financing and Investing Activities

Our Restricted Cash balance is comprised of funds held in separate premium trust accounts as required by state law or, in some cases, per agreement with our carrier partners. In the second quarter of 2015, certain balances that had previously been reported as held in restricted premium trust accounts were reclassified as non-restricted as they were not restricted by state law or by contractual agreement with a carrier. The resulting impact of this change was a reduction in the balance reported on our Consolidated Balance Sheet as Restricted Cash and Investments and a corresponding increase in the balance reported as Cash and Cash Equivalents of approximately $33.0 million as of December 31, 2015 as compared to the corresponding account balances as of December 31, 2014 of $32.2 million which was reflected as Restricted Cash. While these referenced funds are not restricted, they do represent premium payments from customers to be paid to insurance carriers and this change in classification should not be viewed as a source of operating cash.



	For the Year Ended December 31,
(in thousands)	2015		2014		2013
Cash paid during the period for:
Interest	$	37,542	$	25,115	$	16,501
Income taxes	$	132,874	$	118,290	$	110,190

Brown & Brown’s significant non-cash investing and financing activities are summarized as follows:



	For the Year Ended December 31,
(in thousands)	2015		2014		2013
Other payables issued for purchased customer accounts	$	10,029	$	1,930	$	1,425
Estimated acquisition earn-out payables and related charges	$	36,899	$	33,229	$	5,091
Notes received on the sale of fixed assets and customer accounts	$	7,755	$	6,340	$	1,108

Quarterly Operating Results (Notes)

12 Months Ended

Dec. 31, 2015

Quarterly Financial Information Disclosure [Abstract]

Quarterly Financial Information [Text Block]

Quarterly Operating Results (Unaudited)

Quarterly operating results for 2015 and 2014 were as follows:



(in thousands, except per share data)	First Quarter		Second Quarter		Third Quarter		Fourth Quarter
2015
Total revenues	$	404,298	$	419,447	$	432,167	$	404,597
Total expenses	$	310,520	$	318,533	$	319,337	$	309,560
Income before income taxes	$	93,778	$	100,914	$	112,830	$	95,037
Net income	$	56,951	$	61,005	$	67,427	$	57,935
Net income per share:
Basic	$	0.40	$	0.43	$	0.48	$	0.41
Diluted	$	0.39	$	0.43	$	0.47	$	0.41
2014
Total revenues	$	363,594	$	397,764	$	421,418	$	393,020
Total expenses	$	276,757	$	295,983	$	308,733	$	354,574	⁽¹⁾
Income before income taxes	$	86,837	$	101,781	$	112,685	$	38,446	⁽¹⁾
Net income	$	52,415	$	61,755	$	68,331	$	24,395	⁽¹⁾
Net income per share:
Basic	$	0.36	$	0.43	$	0.47	$	0.17
Diluted	$	0.36	$	0.42	$	0.47	$	0.17


(1)	The Company recognized a pre-tax loss on disposal of $47.4 million as a result of the sale of Axiom effective December 31, 2014. The sale was part of the Company’s strategy to exit the reinsurance brokerage business.

Quarterly financial results are affected by seasonal variations. The timing of the Company’s receipt of profit-sharing contingent commissions, policy renewals and acquisitions may cause revenues, expenses and net income to vary significantly between quarters.

Segment Information

12 Months Ended

Dec. 31, 2015

Segment Reporting [Abstract]

Segment Information

Brown & Brown’s business is divided into four reportable segments: (1) the Retail Segment, which provides a broad range of insurance products and services to commercial, public and quasi-public entities, and to professional and individual customers; (2) the National Programs Segment, which acts as a MGA, provides professional liability and related package products for certain professionals, a range of insurance products for individuals, flood coverage, and targeted products and services designated for specific industries, trade groups, governmental entities and market niches, all of which are delivered through nationwide networks of independent agents, and Brown & Brown retail agents; (3) the Wholesale Brokerage Segment, which markets and sells excess and surplus commercial and personal lines insurance, primarily through independent agents and brokers, as well as Brown & Brown retail agents; and (4) the Services Segment, which provides insurance-related services, including third-party claims administration and comprehensive medical utilization management services in both the workers’ compensation and all-lines liability arenas, as well as Medicare Set-aside services, Social Security disability and Medicare benefits advocacy services and claims adjusting services.

Brown & Brown conducts all of its operations within the United States of America, except for a wholesale brokerage operation based in London, England, and retail operations in Bermuda and the Cayman Islands. These operations earned $13.4 million, $13.3 million and $12.2 million of total revenues for the years ended December 31, 2015, 2014 and 2013, respectively. Long-lived assets held outside of the United States during each of these three years were not material.

The accounting policies of the reportable segments are the same as those described in Note 1. The Company evaluates the performance of its segments based upon revenues and income before income taxes. Inter-segment revenues are eliminated.

Summarized financial information concerning the Company’s reportable segments is shown in the following table. The “Other” column includes any income and expenses not allocated to reportable segments and corporate-related items, including the inter-company interest expense charge to the reporting segment.

Segment results for prior periods have been recast to reflect the current year segmental structure. Certain reclassifications

have been made to the prior-year amounts reported in this Annual Report on Form 10-K in order to conform to the current year

presentation.



	For the year ended December 31, 2015
(in thousands)	Retail		National Programs		Wholesale Brokerage		Services		Other			Total
Total revenues	$	870,346	$	428,734	$	216,996	$	145,365	$	(932	)	$	1,660,509
Investment income	$	87	$	210	$	150	$	42	$	515		$	1,004
Amortization	$	45,145	$	28,479	$	9,739	$	4,019	$	39		$	87,421
Depreciation	$	6,558	$	7,250	$	2,142	$	1,988	$	2,952		$	20,890
Interest expense	$	41,036	$	55,705	$	891	$	5,970	$	(64,354	)	$	39,248
Income before income taxes	$	181,938	$	67,673	$	64,708	$	19,713	$	68,527		$	402,559
Total assets	$	3,507,476	$	2,505,752	$	895,782	$	285,459	$	(2,181,730	)	$	5,012,739
Capital expenditures	$	6,797	$	6,001	$	3,084	$	1,088	$	1,405		$	18,375



	For the year ended December 31, 2014
(in thousands)	Retail		National Programs		Wholesale Brokerage		Services		Other			Total
Total revenues	$	823,686	$	404,239	$	211,911	$	136,558	$	(598	)	$	1,575,796
Investment income	$	67	$	164	$	26	$	3	$	487		$	747
Amortization	$	42,935	$	25,129	$	10,703	$	4,135	$	39		$	82,941
Depreciation	$	6,449	$	7,805	$	2,470	$	2,213	$	1,958		$	20,895
Interest expense	$	43,502	$	49,663	$	1,294	$	7,678	$	(73,729	)	$	28,408
Income before income taxes	$	157,491	$	73,178	$	8,276	$	17,870	$	82,934		$	339,749
Total assets	$	3,229,484	$	2,455,749	$	857,804	$	296,034	$	(1,882,613	)	$	4,956,458
Capital expenditures	$	6,873	$	14,133	$	1,526	$	1,210	$	1,181		$	24,923



	For the year ended December 31, 2013
(in thousands)	Retail		National Programs		Wholesale Brokerage		Services		Other			Total
Total revenues	$	737,349	$	301,372	$	193,710	$	131,489	$	(641	)	$	1,363,279
Investment income	$	82	$	19	$	22	$	1	$	514		$	638
Amortization	$	38,523	$	14,953	$	10,719	$	3,698	$	39		$	67,932
Depreciation	$	5,874	$	5,492	$	2,674	$	1,623	$	1,822		$	17,485
Interest expense	$	34,658	$	24,014	$	2,316	$	7,322	$	(51,870	)	$	16,440
Income before income taxes	$	161,787	$	61,223	$	47,501	$	25,791	$	61,307		$	357,609
Total assets	$	3,012,688	$	1,377,404	$	865,731	$	277,652	$	(1,883,967	)	$	3,649,508
Capital expenditures	$	6,886	$	4,810	$	1,825	$	1,811	$	1,034		$	16,366

- Definition

The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments.

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+ Details

Losses and Loss Adjustment Reserve

12 Months Ended

Dec. 31, 2015

Reinsurance Disclosures [Abstract]

Losses and Loss Adjustment Reserve

Although the reinsurers are liable to the Company for amounts reinsured, our subsidiary, Wright Flood remains primarily liable to its policyholders for the full amount of the policies written whether or not the reinsurers meet their obligations to the Company when they become due. The effects of reinsurance on premiums written and earned at December 31 are as follows:



	2015				2014
(in thousands)	Written		Earned		Written			Earned
Direct premiums	$	599,828	$	610,753	$	439,828		$	408,056
Assumed premiums	—		18		(1		)	199
Ceded premiums	599,807		610,750		439,819			408,246
Net premiums	$	21	$	21	$	8		$	8

All premiums written by Wright Flood under the National Flood Insurance Program are 100% ceded to FEMA, for which Wright Flood received a 30.8% expense allowance from January 1, 2015 through September 30, 2015 and 30.9% from October 1, 2015 through December 31, 2015. As of December 31, 2015 and 2014, the Company ceded $598.4 million and $439.1 million of written premiums, respectively.

Effective April 1, 2014, Wright Flood is also a party to a quota share agreement whereby it cedes 100% of its gross excess flood premiums, which excludes fees, to Arch Reinsurance Company and receives a 30.5% commission. Wright Flood ceded $1.4 million and $0.8 million for the years ended December 31, 2015 and 2014. No loss data exists on this agreement.

Wright Flood also ceded 100%, to Arch Reinsurance Company, of the Homeowners, Private Passenger Auto Liability, and Other Liability Occurrence to Stillwater Insurance Company, formerly known as Fidelity National Insurance Company. This business is in runoff. Therefore, only loss data still exists on this business. As of December 31, 2015, ceded unpaid losses and loss adjustment expenses for Homeowners, Private Passenger Auto Liability and Other Liability Occurrence was $8,698, $16,132 and $4,179, respectively. The incurred but not reported balance was $10,335 for Homeowners, $14,383 for Private Passenger Auto Liability and $8,456 for Other Liability Occurrence.

The reinsurance recoverable balance as of December 31, 2015 was $341.6 million and was comprised of recoverables on unpaid losses and loss expenses of $32.0 million and prepaid reinsurance premiums of $309.6 million. The reinsurance recoverable balance as of December 31, 2014 was $333.6 million that is comprised of recoverables on unpaid losses and loss expenses of $13.0 million and prepaid reinsurance premiums of $320.6 million There was no net activity in the reserve for losses and loss adjustment expense for the years ended December 31, 2015 and 2014, as Wright Flood’s direct premiums written were 100% ceded to three reinsurers. The balance of the reserve for losses and loss adjustment expense, excluding related reinsurance recoverable was $32.0 million as of December 31, 2015 and $13.0 million as of December 31, 2014.

Subsidiary Dividend Restrictions	12 Months Ended
Subsidiary Dividend Restrictions	Dec. 31, 2015
Disclosure of Restrictions on Dividends, Loans and Advances Disclosure [Abstract]
Subsidiary Dividend Restrictions	Subsidiary Dividend Restrictions Under the insurance regulations of Texas, the maximum amount of ordinary dividends that Wright Flood can pay to shareholders in a rolling twelve month period is limited to the greater of 10% of statutory adjusted capital and surplus as shown on Wright Flood’s last annual statement on file with the superintendent of the Texas Department of Insurance or 100% of adjusted net income. As an extraordinary dividend of $7.0 million was paid on May 20, 2014, no ordinary dividend could be paid until May 21, 2015. There was no dividend payout in 2015 and the maximum dividend payout that may be made in 2016 without prior approval is $4.1 million.

Shareholders' Equity	12 Months Ended
Shareholders' Equity	Dec. 31, 2015
Equity [Abstract]
Shareholders' Equity	Shareholders’ Equity On July 18, 2014, the Company’s Board of Directors authorized the repurchase of up to $200.0 million of its shares of common stock. This was in addition to the $25.0 million that was authorized in the first quarter and executed in the second quarter of 2014. On September 2, 2014, the Company entered into an accelerated share repurchase agreement (“ASR”) with an investment bank to purchase an aggregate $50.0 million of the Company’s common stock. The total number of shares purchased under the ASR of 1,539,760 was determined upon settlement of the final delivery and was based on the Company’s volume weighted average price per its common share over the ASR period less a discount. On March 5, 2015, the Company entered into an ASR with an investment bank to purchase an aggregate $100.0 million of the Company’s common stock. As part of the ASR, the Company received an initial delivery of 2,667,992 shares of the Company’s common stock with a fair market value of approximately $85.0 million. On August 6, 2015, the Company was notified by its investment bank that the March 5, 2015 ASR agreement between the Company and the investment bank had been completed in accordance with the terms of the agreement. The investment bank delivered to the Company an additional 391,637 shares of the Company’s common stock for a total of 3,059,629 shares repurchased under the agreement. The delivery of the remaining 391,637 shares occurred on August 11, 2015. At the conclusion of this contract the Company had authorization for $50.0 million of share repurchases under the original Board authorization. On July 20, 2015, the Company’s Board of Directors authorized the repurchase of up to an additional $400.0 million of the Company’s outstanding common stock. With this authorization, the Company had total available approval to repurchase up to $450 million, in the aggregate, of the Company’s outstanding common stock. On November 11, 2015, the Company entered into a third ASR with an investment bank to purchase an aggregate $75 million of the Company’s common stock. The Company received an initial delivery of 1,985,981 shares of the Company’s common stock with a fair market value of approximately $63.75 million. On January 6, 2016 this agreement was completed by the investment bank with the delivery of 363,209 shares of the Company’s common stock. After completion of this third ASR, the Company has approval to repurchase up to $375.0 million, in the aggregate, of the Company’s outstanding common stock. Under the authorization from the Company’s Board of Directors, shares may be purchased from time to time, at the Company’s discretion and subject to the availability of stock, market conditions, the trading price of the stock, alternative uses for capital, the Company’s financial performance and other potential factors. These purchases may be carried out through open market purchases, block trades, accelerated share repurchase plans of up to $100.0 million each (unless otherwise approved by the Board of Directors), negotiated private transactions or pursuant to any trading plan that may be adopted in accordance with Rule 10b5-1 of the Securities Exchange Act of 1934.

- Definition

The entire disclosure for shareholders' equity comprised of portions attributable to the parent entity and noncontrolling interest, including other comprehensive income. Includes, but is not limited to, balances of common stock, preferred stock, additional paid-in capital, other capital and retained earnings, accumulated balance for each classification of other comprehensive income and amount of comprehensive income.

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+ Details

Legal and Regulatory Proceedings

12 Months Ended

Dec. 31, 2015

Commitments and Contingencies Disclosure [Abstract]

Legal and Regulatory Proceedings

Operating Leases

Brown & Brown leases facilities and certain items of office equipment under non-cancelable operating lease arrangements expiring on various dates through 2042. The facility leases generally contain renewal options and escalation clauses based upon increases in the lessors’ operating expenses and other charges. Brown & Brown anticipates that most of these leases will be renewed or replaced upon expiration. At December 31, 2015, the aggregate future minimum lease payments under all non-cancelable lease agreements were as follows:



(in thousands)
2016	$	40,900
2017	37,109
2018	31,612
2019	25,962
2020	21,283
Thereafter	38,406
Total minimum future lease payments	$	195,272

Rental expense in 2015, 2014 and 2013 for operating leases totaled $46.0 million, $49.0 million, and $43.0 million, respectively.

Legal Proceedings

The Company records losses for claims in excess of the limits of, or outside the coverage of, applicable insurance at the time and to the extent they are probable and estimable. In accordance with ASC Topic 450-Contingencies, the Company accrues anticipated costs of settlement, damages, losses for liability claims and, under certain conditions, costs of defense, based on historical experience or to the extent specific losses are probable and estimable. Otherwise, the Company expenses these costs as incurred. If the best estimate of a probable loss is a range rather than a specific amount, the Company accrues the amount at the lower end of the range.

The Company’s accruals for legal matters that were probable and estimable were not material at December 31, 2015 and 2014. We continue to assess certain litigation and claims to determine the amounts, if any, that management believes will be paid as a result of such claims and litigation and, therefore, additional losses may be accrued and paid in the future, which could adversely impact the Company’s operating results, cash flows and overall liquidity. The Company maintains third-party insurance policies to provide coverage for certain legal claims, in an effort to mitigate its overall exposure to unanticipated claims or adverse decisions. However, as (i) one or more of the Company’s insurance carriers could take the position that portions of these claims are not covered by the Company’s insurance, (ii) to the extent that payments are made to resolve claims and lawsuits, applicable insurance policy limits are eroded and (iii) the claims and lawsuits relating to these matters are continuing to develop, it is possible that future results of operations or cash flows for any particular quarterly or annual period could be materially affected by unfavorable resolutions of these matters. Based on the AM Best Company ratings of these third-party insurers, management does not believe there is a substantial risk of an insurer’s material nonperformance related to any current insured claims.

On the basis of current information, the availability of insurance and legal advice, in management’s opinion, the Company is not currently involved in any legal proceedings which, individually or in the aggregate, would have a material adverse effect on its financial condition, operations and/or cash flows.

Summary of Significant Accounting Policies (Policies)	12 Months Ended
Summary of Significant Accounting Policies (Policies)	Dec. 31, 2015
Property, Plant and Equipment [Line Items]
Average Annual Operating Profit Earned Period Maximum	3 years
Average Annual Operating Profit Earned Period, Minimum	1 year
Fair Value of Financial Instruments, Policy [Policy Text Block]	Fair Value of Financial Instruments The carrying amounts of Brown & Brown’s financial assets and liabilities, including cash and cash equivalents; restricted cash and short-term investments; investments; premiums, commissions and fees receivable; reinsurance recoverable; prepaid reinsurance premiums; premiums payable to insurance companies; losses and loss adjustment reserve; unearned premium; premium deposits and credits due customers and accounts payable, at December 31, 2015 and 2014, approximate fair value because of the short-term maturity of these instruments. The carrying amount of Brown & Brown’s long-term debt approximates fair value at December 31, 2015 and 2014 as our fixed-rate borrowings of $623.6 million approximate their values using market quotes of notes with the similar terms as ours, which we deem a close approximation of current market rates. Of the $623.6 million, $25.0 million is related to short-term notes which approximates its carrying value due to its proximity to maturity. The estimated fair value of the $529.4 million remaining on the term loan under our J.P. Morgan Credit Facility approximates the carrying value due to the variable interest rate based on adjusted LIBOR. See Note 2 to our Consolidated Financial Statements for the fair values related to the establishment of intangible assets and the establishment and adjustment of earn-out payables. See Note 5 for information on the fair value of investments and Note 8 for information on the fair value of long-term debt.
Nature of Operations	Summary of Significant Accounting Policies Nature of Operations Brown & Brown, Inc., a Florida corporation, and its subsidiaries (collectively, “Brown & Brown” or the “Company”) is a diversified insurance agency, wholesale brokerage, insurance programs and services organization that markets and sells to its customers, insurance products and services, primarily in the property and casualty area. Brown & Brown’s business is divided into four reportable segments: the Retail Segment provides a broad range of insurance products and services to commercial, public entity, professional and individual customers; the National Programs Segment, acting as a managing general agent (“MGA”), provides professional liability and related package products for certain professionals, a range of insurance products for individuals, flood coverage, and targeted products and services designated for specific industries, trade groups, governmental entities and market niches, all of which are delivered through nationwide networks of independent agents, and Brown & Brown retail agents; the Wholesale Brokerage Segment markets and sells excess and surplus commercial insurance, primarily through independent agents and brokers, as well as Brown & Brown Retail offices; and the Services Segment provides insurance-related services, including third-party claims administration and comprehensive medical utilization management services in both the workers’ compensation and all-lines liability arenas, as well as Medicare Set-aside services, Social Security disability and Medicare benefits advocacy services, and claims adjusting services. In addition, as the result of our acquisition of The Wright Insurance Group, LLC (“Wright”) in May 2014, we own a flood insurance carrier, Wright National Flood Insurance Company (“Wright Flood”), that is a Wright subsidiary. Wright Flood’s business consists of policies written pursuant to the National Flood Insurance Program, the program administered by the Federal Emergency Management Agency (“FEMA”), and several excess flood insurance policies, all of which are fully reinsured. Recently Issued Accounting Pronouncements In February 2016, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2016-02, “Leases (Topic 842)” (“ASU 2016-02”), which provides guidance for accounting for leases. Under ASU 2016-02, the Company will be required to recognize the assets and liabilities for the rights and obligations created by leased assets. ASU 2016-02 will take effect for public companies for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2018. The Company is currently evaluating its leases against the requirements of this pronouncement. In November 2015, FASB issued ASU No. 2015-17, “Income Taxes (Topic 740) - Balance Sheet Classification of Deferred Taxes” (“ASU 2015-17”), which simplifies the presentation of deferred income taxes by requiring deferred tax assets and liabilities be classified as a single non-current item on the balance sheet. ASU 2015-17 is effective for fiscal years beginning after December 15, 2016 with early adoption permitted as of the beginning of any interim or annual reporting period. The Company plans to adopt ASU 2015-17 in the first quarter of 2017. This is not expected to have a material impact on our Consolidated Financial Statements other than reclassifying current deferred tax assets and liabilities to non-current in the balance sheet. In September 2015, FASB issued ASU No. 2015-16, “Business Combinations (Topic 805): Simplifying the Accounting for Measurement-Period Adjustments” (“ASU 2015-16”), which requires that an acquirer recognize adjustments to provisional amounts that are identified during the measurement period in the reporting period in which the adjustment amounts are determined. ASU 2015-16 is effective for fiscal years, and interim reporting periods within those fiscal years, beginning after December 15, 2015. The Company has determined that the impact of the adoption of this guidance on the Consolidated Financial Statements would not be material. In August 2015, FASB issued ASU No. 2015-15, “Interest-Imputation of Interest (Subtopic 835-30): Presentation and Subsequent Measurement of Debt Issuance Costs Associated with Line-of-Credit Arrangements”. This standard is in addition to ASU No. 2015-03 and adds SEC paragraphs pursuant to an SEC Staff Announcement that the SEC staff would not object to an entity deferring and presenting debt issuance costs associated with a line-of-credit arrangement as an asset and subsequently amortizing the costs ratably over the term of the arrangement. The Company plans to adopt ASU 2015-03 in the first quarter of 2016. As the Company’s debt issuance costs are not material, implementation of this update is not expected to have a material impact on the Company’s Consolidated Financial Statements. In April 2015, FASB issued ASU No. 2015-05, “Intangibles-Goodwill and Other-Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Fees Paid in a Cloud Computing Arrangement” (“ASU 2015-05”), which issues guidance on determining whether a cloud computing arrangement contains a software license that should be accounted for as internal-use software. If a cloud computing arrangement does not contain a software license, it should be accounted for as a service contract. This guidance is effective for fiscal years beginning after December 15, 2015 and for interim periods within those fiscal years, with early adoption permitted. The Company has to this point not been a party to any material cloud computing arrangements and as such has determined the impact of the adoption of this guidance on the Consolidated Financial Statements to be immaterial. In April 2015, FASB issued ASU No. 2015-03, “Simplifying the Presentation of Debt Issuance Costs” (“ASU 2015-03”), which requires that debt issuance costs related to a recognized debt liability be presented in the balance sheet as a direct deduction from the carrying amount of that debt liability, consistent with debt discounts, and not recorded as separate assets. This update is effective for reporting periods beginning after December 15, 2015, and is to be applied on a retrospective basis. The Company plans to adopt ASU 2015-03 in the first quarter of 2016. As the Company’s debt issuance costs are not material, implementation of this update is not expected to have a material impact on the Company’s Consolidated Financial Statements. In August 2014, FASB issued ASU No. 2014-15, “Disclosure of Uncertainties About an Entity’s Ability to Continue as a Going Concern” (“ASU 2014-15”), which addresses management’s responsibility in evaluating whether there is substantial doubt about a company’s ability to continue as a going concern and to provide related footnote disclosures. ASU 2014-15 is effective for fiscal years beginning after December 15, 2016 and for interim periods within those fiscal years, with early adoption permitted. The Company does not expect to early adopt this guidance, and it believes the adoption of this guidance will not have an impact on the Consolidated Financial Statements. In May 2014, FASB issued ASU No. 2014-09, “Revenue from Contracts with Customers” (“ASU 2014-09”), which provides guidance for revenue recognition. ASU 2014-09 affects any entity that either enters into contracts with customers to transfer goods or services or enters into contracts for the transfer of non-financial assets, and supersedes the revenue recognition requirements in Topic 605, “Revenue Recognition,” and most industry-specific guidance. The standard’s core principle is that a company will recognize revenue when it transfers promised goods or services to customers in an amount that reflects the consideration to which a company expects to be entitled in exchange for those goods or services. In doing so, companies will need to use more judgment and make more estimates than under the current guidance. These may include identifying performance obligations in the contract, estimating the amount of variable consideration to include in the transaction price and allocating the transaction price to each separate performance obligation. ASU 2014-09 is effective for the Company beginning January 1, 2018, after FASB voted to delay the effective date by one year. At that time, the Company may adopt the new standard under the full retrospective approach or the modified retrospective approach. The Company is currently evaluating its revenue streams against the requirements of this pronouncement. Principles of Consolidation The accompanying Consolidated Financial Statements include the accounts of Brown & Brown, Inc. and its subsidiaries. All significant inter-company account balances and transactions have been eliminated in the Consolidated Financial Statements. Segment results for prior periods have been recast to reflect the current year segmental structure. Certain reclassifications have been made to the prior-year amounts reported in this Annual Report on Form 10-K in order to conform to the current year presentation. Revenue Recognition Commission revenues are recognized as of the effective date of the insurance policy or the date on which the policy premium is processed into our systems, whichever is later. Commission revenues related to installment billings are recognized on the latter of effective or invoiced date, with the exception of our Arrowhead business which follows a policy of recognizing on the latter of effective or processed date into our systems regardless of the billing arrangement. Management determines the policy cancellation reserve based upon historical cancellation experience adjusted for any known circumstances. Subsequent commission adjustments are recognized upon our receipt of notification from insurance companies concerning matters necessitating such adjustments. Profit-sharing contingent commissions are recognized when determinable, which is generally when such commissions are received from insurance companies, or when we receive formal notification of the amount of such payments. Fee revenues and commissions for workers’ compensation programs are recognized as services are rendered. Use of Estimates The preparation of the Consolidated Financial Statements in conformity with accounting principles generally accepted in the United States of America (“U.S. GAAP”) requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, as well as disclosures of contingent assets and liabilities, at the date of the Consolidated Financial Statements, and the reported amounts of revenues and expenses during the reporting period. Actual results may differ from those estimates. Cash and Cash Equivalents Cash and cash equivalents principally consist of demand deposits with financial institutions and highly liquid investments with quoted market prices having maturities of three months or less when purchased. Restricted Cash and Investments, and Premiums, Commissions and Fees Receivable In our capacity as an insurance agent or broker, the Company typically collects premiums from insureds and, after deducting its authorized commissions, remits the net premiums to the appropriate insurance company or companies. Accordingly, as reported in the Consolidated Balance Sheets, “premiums” are receivable from insureds. Unremitted net insurance premiums are held in a fiduciary capacity until Brown & Brown disburses them. Where allowed by law, Brown & Brown invests these unremitted funds only in cash, money market accounts, tax-free variable-rate demand bonds and commercial paper held for a short term. In certain states in which Brown & Brown operates, the use and investment alternatives for these funds are regulated and restricted by various state laws and agencies. These restricted funds are reported as restricted cash and investments on the Consolidated Balance Sheets. The interest income earned on these unremitted funds, where allowed by state law, is reported as investment income in the Consolidated Statement of Income. In other circumstances, the insurance companies collect the premiums directly from the insureds and remit the applicable commissions to Brown & Brown. Accordingly, as reported in the Consolidated Balance Sheets, “commissions” are receivables from insurance companies. “Fees” are primarily receivables due from customers. Investments Certificates of deposit, and other securities, having maturities of more than three months when purchased are reported at cost and are adjusted for other-than-temporary market value declines. As part of the acquisition of Wright in 2014, we acquired additional investments, which include U.S. Government, Municipal, domestic corporate and foreign corporate bonds as well as short-duration fixed income funds. Investments within the portfolio or funds are held as available for sale and are carried at their fair value. Any gain/loss applicable from the fair value change is recorded, net of tax, as other comprehensive income under the equity section of the Consolidated Balance Sheet. Realized gains and losses are reported on the Consolidated Statement of Income, with the cost of securities sold determined on a specific identification basis. Fixed Assets Fixed assets, including leasehold improvements, are carried at cost, less accumulated depreciation and amortization. Expenditures for improvements are capitalized, and expenditures for maintenance and repairs are expensed to operations as incurred. Upon sale or retirement, the cost and related accumulated depreciation and amortization are removed from the accounts and the resulting gain or loss, if any, is reflected in other income. Depreciation has been determined using the straight-line method over the estimated useful lives of the related assets, which range from three to 15 years. Leasehold improvements are amortized on the straight-line method over the shorter of the useful life of the improvement or the term of the related lease. Goodwill and Amortizable Intangible Assets All of our business combinations initiated after June 30, 2001 are accounted for using the purchase method. Acquisition purchase prices are typically based on a multiple of average annual operating profit earned over a one to three year period within a minimum and maximum price range. The recorded purchase prices for all acquisitions consummated after January 1, 2009 include an estimation of the fair value of liabilities associated with any potential earn-out provisions. Subsequent changes in the fair value of earn-out obligations are recorded in the Consolidated Statement of Income when incurred. The fair value of earn-out obligations is based on the present value of the expected future payments to be made to the sellers of the acquired businesses in accordance with the provisions contained in the respective purchase agreements. In determining fair value, the acquired business’ future performance is estimated using financial projections developed by management for the acquired business and this estimate reflects market participant assumptions regarding revenue growth and/or profitability. The expected future payments are estimated on the basis of the earn-out formula and performance targets specified in each purchase agreement compared to the associated financial projections. These estimates are then discounted to present value using a risk-adjusted rate that takes into consideration the likelihood that the forecasted earn-out payments will be made. Amortizable intangible assets are stated at cost, less accumulated amortization, and consist of purchased customer accounts and non-compete agreements. Purchased customer accounts and non-compete agreements are amortized on a straight-line basis over the related estimated lives and contract periods, which range from five to 15 years. Purchased customer accounts primarily consist of records and files that contain information about insurance policies and the related insured parties that are essential to policy renewals. The excess of the purchase price of an acquisition over the fair value of the identifiable tangible and amortizable intangible assets is assigned to goodwill. While goodwill is not amortizable, it is subject to assessment at least annually, and more frequently in the presence of certain circumstances, for impairment by application of a fair value-based test. The Company compares the fair value of each reporting unit with its carrying amount to determine if there is potential impairment of goodwill. If the fair value of the reporting unit is less than its carrying value, an impairment loss is recorded to the extent that the fair value of the goodwill within the reporting unit is less than its carrying value. Fair value is estimated based on multiples of earnings before interest, income taxes, depreciation, amortization and change in estimated acquisition earn-out payables (“EBITDAC”), or on a discounted cash flow basis. Brown & Brown completed its most recent annual assessment as of November 30, 2015 and determined that the fair value of goodwill exceeded the carrying value of such assets. In addition, as of December 31, 2015, there are no accumulated impairment losses. The carrying value of amortizable intangible assets attributable to each business or asset group comprising Brown & Brown is periodically reviewed by management to determine if there are events or changes in circumstances that would indicate that its carrying amount may not be recoverable. Accordingly, if there are any such changes in circumstances during the year, Brown & Brown assesses the carrying value of its amortizable intangible assets by considering the estimated future undiscounted cash flows generated by the corresponding business or asset group. Any impairment identified through this assessment may require that the carrying value of related amortizable intangible assets be adjusted. There were no impairments recorded for the years ended December 31, 2015, 2014 and 2013. Income Taxes Brown & Brown records income tax expense using the asset-and-liability method of accounting for deferred income taxes. Under this method, deferred tax assets and liabilities are recognized for the expected future tax consequences of temporary differences between the financial statement carrying values and the income tax bases of Brown & Brown’s assets and liabilities. Brown & Brown files a consolidated federal income tax return and has elected to file consolidated returns in certain states. Deferred income taxes are provided for in the Consolidated Financial Statements and relate principally to expenses charged to income for financial reporting purposes in one period and deducted for income tax purposes in other periods.
Recently Issued Accounting Pronouncements	Recently Issued Accounting Pronouncements In February 2016, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2016-02, “Leases (Topic 842)” (“ASU 2016-02”), which provides guidance for accounting for leases. Under ASU 2016-02, the Company will be required to recognize the assets and liabilities for the rights and obligations created by leased assets. ASU 2016-02 will take effect for public companies for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2018. The Company is currently evaluating its leases against the requirements of this pronouncement. In November 2015, FASB issued ASU No. 2015-17, “Income Taxes (Topic 740) - Balance Sheet Classification of Deferred Taxes” (“ASU 2015-17”), which simplifies the presentation of deferred income taxes by requiring deferred tax assets and liabilities be classified as a single non-current item on the balance sheet. ASU 2015-17 is effective for fiscal years beginning after December 15, 2016 with early adoption permitted as of the beginning of any interim or annual reporting period. The Company plans to adopt ASU 2015-17 in the first quarter of 2017. This is not expected to have a material impact on our Consolidated Financial Statements other than reclassifying current deferred tax assets and liabilities to non-current in the balance sheet. In September 2015, FASB issued ASU No. 2015-16, “Business Combinations (Topic 805): Simplifying the Accounting for Measurement-Period Adjustments” (“ASU 2015-16”), which requires that an acquirer recognize adjustments to provisional amounts that are identified during the measurement period in the reporting period in which the adjustment amounts are determined. ASU 2015-16 is effective for fiscal years, and interim reporting periods within those fiscal years, beginning after December 15, 2015. The Company has determined that the impact of the adoption of this guidance on the Consolidated Financial Statements would not be material. In August 2015, FASB issued ASU No. 2015-15, “Interest-Imputation of Interest (Subtopic 835-30): Presentation and Subsequent Measurement of Debt Issuance Costs Associated with Line-of-Credit Arrangements”. This standard is in addition to ASU No. 2015-03 and adds SEC paragraphs pursuant to an SEC Staff Announcement that the SEC staff would not object to an entity deferring and presenting debt issuance costs associated with a line-of-credit arrangement as an asset and subsequently amortizing the costs ratably over the term of the arrangement. The Company plans to adopt ASU 2015-03 in the first quarter of 2016. As the Company’s debt issuance costs are not material, implementation of this update is not expected to have a material impact on the Company’s Consolidated Financial Statements. In April 2015, FASB issued ASU No. 2015-05, “Intangibles-Goodwill and Other-Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Fees Paid in a Cloud Computing Arrangement” (“ASU 2015-05”), which issues guidance on determining whether a cloud computing arrangement contains a software license that should be accounted for as internal-use software. If a cloud computing arrangement does not contain a software license, it should be accounted for as a service contract. This guidance is effective for fiscal years beginning after December 15, 2015 and for interim periods within those fiscal years, with early adoption permitted. The Company has to this point not been a party to any material cloud computing arrangements and as such has determined the impact of the adoption of this guidance on the Consolidated Financial Statements to be immaterial. In April 2015, FASB issued ASU No. 2015-03, “Simplifying the Presentation of Debt Issuance Costs” (“ASU 2015-03”), which requires that debt issuance costs related to a recognized debt liability be presented in the balance sheet as a direct deduction from the carrying amount of that debt liability, consistent with debt discounts, and not recorded as separate assets. This update is effective for reporting periods beginning after December 15, 2015, and is to be applied on a retrospective basis. The Company plans to adopt ASU 2015-03 in the first quarter of 2016. As the Company’s debt issuance costs are not material, implementation of this update is not expected to have a material impact on the Company’s Consolidated Financial Statements. In August 2014, FASB issued ASU No. 2014-15, “Disclosure of Uncertainties About an Entity’s Ability to Continue as a Going Concern” (“ASU 2014-15”), which addresses management’s responsibility in evaluating whether there is substantial doubt about a company’s ability to continue as a going concern and to provide related footnote disclosures. ASU 2014-15 is effective for fiscal years beginning after December 15, 2016 and for interim periods within those fiscal years, with early adoption permitted. The Company does not expect to early adopt this guidance, and it believes the adoption of this guidance will not have an impact on the Consolidated Financial Statements. In May 2014, FASB issued ASU No. 2014-09, “Revenue from Contracts with Customers” (“ASU 2014-09”), which provides guidance for revenue recognition. ASU 2014-09 affects any entity that either enters into contracts with customers to transfer goods or services or enters into contracts for the transfer of non-financial assets, and supersedes the revenue recognition requirements in Topic 605, “Revenue Recognition,” and most industry-specific guidance. The standard’s core principle is that a company will recognize revenue when it transfers promised goods or services to customers in an amount that reflects the consideration to which a company expects to be entitled in exchange for those goods or services. In doing so, companies will need to use more judgment and make more estimates than under the current guidance. These may include identifying performance obligations in the contract, estimating the amount of variable consideration to include in the transaction price and allocating the transaction price to each separate performance obligation. ASU 2014-09 is effective for the Company beginning January 1, 2018, after FASB voted to delay the effective date by one year. At that time, the Company may adopt the new standard under the full retrospective approach or the modified retrospective approach. The Company is currently evaluating its revenue streams against the requirements of this pronouncement.
Consolidation, Policy [Policy Text Block]	Principles of Consolidation The accompanying Consolidated Financial Statements include the accounts of Brown & Brown, Inc. and its subsidiaries. All significant inter-company account balances and transactions have been eliminated in the Consolidated Financial Statements. Segment results for prior periods have been recast to reflect the current year segmental structure. Certain reclassifications have been made to the prior-year amounts reported in this Annual Report on Form 10-K in order to conform to the current year presentation.
Revenue Recognition, Policy [Policy Text Block]	Revenue Recognition Commission revenues are recognized as of the effective date of the insurance policy or the date on which the policy premium is processed into our systems, whichever is later. Commission revenues related to installment billings are recognized on the latter of effective or invoiced date, with the exception of our Arrowhead business which follows a policy of recognizing on the latter of effective or processed date into our systems regardless of the billing arrangement. Management determines the policy cancellation reserve based upon historical cancellation experience adjusted for any known circumstances. Subsequent commission adjustments are recognized upon our receipt of notification from insurance companies concerning matters necessitating such adjustments. Profit-sharing contingent commissions are recognized when determinable, which is generally when such commissions are received from insurance companies, or when we receive formal notification of the amount of such payments. Fee revenues and commissions for workers’ compensation programs are recognized as services are rendered.
Use of Estimates, Policy [Policy Text Block]	Use of Estimates The preparation of the Consolidated Financial Statements in conformity with accounting principles generally accepted in the United States of America (“U.S. GAAP”) requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, as well as disclosures of contingent assets and liabilities, at the date of the Consolidated Financial Statements, and the reported amounts of revenues and expenses during the reporting period. Actual results may differ from those estimates
Cash and Cash Equivalents, Policy [Policy Text Block]	Cash and Cash Equivalents Cash and cash equivalents principally consist of demand deposits with financial institutions and highly liquid investments with quoted market prices having maturities of three months or less when purchased.
Restricted Cash and Investments Premiums Commissions and Fees Receivable Policy [Text Block]	Restricted Cash and Investments, and Premiums, Commissions and Fees Receivable In our capacity as an insurance agent or broker, the Company typically collects premiums from insureds and, after deducting its authorized commissions, remits the net premiums to the appropriate insurance company or companies. Accordingly, as reported in the Consolidated Balance Sheets, “premiums” are receivable from insureds. Unremitted net insurance premiums are held in a fiduciary capacity until Brown & Brown disburses them. Where allowed by law, Brown & Brown invests these unremitted funds only in cash, money market accounts, tax-free variable-rate demand bonds and commercial paper held for a short term. In certain states in which Brown & Brown operates, the use and investment alternatives for these funds are regulated and restricted by various state laws and agencies. These restricted funds are reported as restricted cash and investments on the Consolidated Balance Sheets. The interest income earned on these unremitted funds, where allowed by state law, is reported as investment income in the Consolidated Statement of Income. In other circumstances, the insurance companies collect the premiums directly from the insureds and remit the applicable commissions to Brown & Brown. Accordingly, as reported in the Consolidated Balance Sheets, “commissions” are receivables from insurance companies. “Fees” are primarily receivables due from customers.
Investment, Policy [Policy Text Block]	Investments Certificates of deposit, and other securities, having maturities of more than three months when purchased are reported at cost and are adjusted for other-than-temporary market value declines. As part of the acquisition of Wright in 2014, we acquired additional investments, which include U.S. Government, Municipal, domestic corporate and foreign corporate bonds as well as short-duration fixed income funds. Investments within the portfolio or funds are held as available for sale and are carried at their fair value. Any gain/loss applicable from the fair value change is recorded, net of tax, as other comprehensive income under the equity section of the Consolidated Balance Sheet.
Property, Plant and Equipment, Policy [Policy Text Block]	Fixed Assets Fixed assets, including leasehold improvements, are carried at cost, less accumulated depreciation and amortization. Expenditures for improvements are capitalized, and expenditures for maintenance and repairs are expensed to operations as incurred. Upon sale or retirement, the cost and related accumulated depreciation and amortization are removed from the accounts and the resulting gain or loss, if any, is reflected in other income. Depreciation has been determined using the straight-line method over the estimated useful lives of the related assets, which range from three to 15 years. Leasehold improvements are amortized on the straight-line method over the shorter of the useful life of the improvement or the term of the related lease.
Goodwill and Intangible Assets, Intangible Assets, Policy [Policy Text Block]	Goodwill and Amortizable Intangible Assets All of our business combinations initiated after June 30, 2001 are accounted for using the purchase method. Acquisition purchase prices are typically based on a multiple of average annual operating profit earned over a one to three year period within a minimum and maximum price range. The recorded purchase prices for all acquisitions consummated after January 1, 2009 include an estimation of the fair value of liabilities associated with any potential earn-out provisions. Subsequent changes in the fair value of earn-out obligations are recorded in the Consolidated Statement of Income when incurred. The fair value of earn-out obligations is based on the present value of the expected future payments to be made to the sellers of the acquired businesses in accordance with the provisions contained in the respective purchase agreements. In determining fair value, the acquired business’ future performance is estimated using financial projections developed by management for the acquired business and this estimate reflects market participant assumptions regarding revenue growth and/or profitability. The expected future payments are estimated on the basis of the earn-out formula and performance targets specified in each purchase agreement compared to the associated financial projections. These estimates are then discounted to present value using a risk-adjusted rate that takes into consideration the likelihood that the forecasted earn-out payments will be made. Amortizable intangible assets are stated at cost, less accumulated amortization, and consist of purchased customer accounts and non-compete agreements. Purchased customer accounts and non-compete agreements are amortized on a straight-line basis over the related estimated lives and contract periods, which range from five to 15 years. Purchased customer accounts primarily consist of records and files that contain information about insurance policies and the related insured parties that are essential to policy renewals. The excess of the purchase price of an acquisition over the fair value of the identifiable tangible and amortizable intangible assets is assigned to goodwill. While goodwill is not amortizable, it is subject to assessment at least annually, and more frequently in the presence of certain circumstances, for impairment by application of a fair value-based test. The Company compares the fair value of each reporting unit with its carrying amount to determine if there is potential impairment of goodwill. If the fair value of the reporting unit is less than its carrying value, an impairment loss is recorded to the extent that the fair value of the goodwill within the reporting unit is less than its carrying value. Fair value is estimated based on multiples of earnings before interest, income taxes, depreciation, amortization and change in estimated acquisition earn-out payables (“EBITDAC”), or on a discounted cash flow basis. Brown & Brown completed its most recent annual assessment as of November 30, 2015 and determined that the fair value of goodwill exceeded the carrying value of such assets. In addition, as of December 31, 2015, there are no accumulated impairment losses. The carrying value of amortizable intangible assets attributable to each business or asset group comprising Brown & Brown is periodically reviewed by management to determine if there are events or changes in circumstances that would indicate that its carrying amount may not be recoverable. Accordingly, if there are any such changes in circumstances during the year, Brown & Brown assesses the carrying value of its amortizable intangible assets by considering the estimated future undiscounted cash flows generated by the corresponding business or asset group. Any impairment identified through this assessment may require that the carrying value of related amortizable intangible assets be adjusted. There were no impairments recorded for the years ended December 31, 2015, 2014 and 2013.
Income Tax, Policy [Policy Text Block]	Income Taxes Brown & Brown records income tax expense using the asset-and-liability method of accounting for deferred income taxes. Under this method, deferred tax assets and liabilities are recognized for the expected future tax consequences of temporary differences between the financial statement carrying values and the income tax bases of Brown & Brown’s assets and liabilities. Brown & Brown files a consolidated federal income tax return and has elected to file consolidated returns in certain states. Deferred income taxes are provided for in the Consolidated Financial Statements and relate principally to expenses charged to income for financial reporting purposes in one period and deducted for income tax purposes in other periods.
Share-based Compensation, Option and Incentive Plans Policy [Policy Text Block]	Stock-Based Compensation The Company granted stock options and grants non-vested stock awards to its employees, officers and directors. The Company uses the modified-prospective method to account for share-based payments. Under the modified-prospective method, compensation cost is recognized for all share-based payments granted on or after January 1, 2006 and for all awards granted to employees prior to January 1, 2006 that remained unvested on that date. The Company uses the alternative-transition method to account for the income tax effects of payments made related to stock-based compensation. The Company uses the Black-Scholes valuation model for valuing all stock options and shares purchased under the Employee Stock Purchase Plan (the “ESPP”). Compensation for non-vested stock awards is measured at fair value on the grant date based upon the number of shares expected to vest. Compensation cost for all awards is recognized in earnings, net of estimated forfeitures, on a straight-line basis over the requisite service period
Reinsurance Accounting Policy [Policy Text Block]	Reinsurance The Company protects itself from claims related losses by reinsuring all claims risk exposure. The only line of insurance the Company underwrites is flood insurance associated with Wright. However, all exposure is reinsured with FEMA for basic admitted policies conforming to the National Flood Insurance Program. For excess flood insurance policies, all exposure is reinsured with a reinsurance carrier with an AM Best Company rating of “A” or better. Reinsurance does not legally discharge the ceding insurer from the primary liability for the full amount due under the reinsured policies. Reinsurance premiums, commissions, expense reimbursement and related reserves related to ceded business are accounted for on a basis consistent with the accounting for the original policies issued and the terms of reinsurance contracts. Premiums earned and losses and loss adjustment expenses incurred are reported net of reinsurance amounts. Other underwriting expenses are shown net of earned ceding commission income. The liabilities for unpaid losses and loss adjustment expenses and unearned premiums are reported gross of ceded reinsurance recoverable. Balances due from reinsurers on unpaid losses and loss adjustment expenses, including an estimate of such recoverables related to reserves for incurred but not reported (“IBNR”) losses, are reported as assets and are included in reinsurance recoverable even though amounts due on unpaid loss and loss adjustment expense are not recoverable from the reinsurer until such losses are paid. The Company does not believe it is exposed to any material credit risk through its reinsurance as the reinsurer is FEMA for basic admitted flood policies and a national reinsurance carrier for excess flood policies, which has an AM Best Company rating of “A” or better. Historically, no amounts due from reinsurance carriers have been written off as uncollectible.
Unpaid Policy Claims and Claims Adjustment Expense, Policy [Policy Text Block]	Unpaid Losses and Loss Adjustment Reserve Unpaid losses and loss adjustment reserve include amounts determined on individual claims and other estimates based on the past experience of WNFIC and the policyholders for IBNR claims, less anticipated salvage and subrogation recoverable. The methods of making such estimates and for establishing the resulting reserves are continually reviewed and updated, and any adjustments resulting therefrom are reflected in operations currently. WNFIC engages the services of outside actuarial consulting firms (the “Actuaries”) to assist on an annual basis to render an opinion on the sufficiency of the Company’s estimates for unpaid losses and related loss adjustment reserve. The Actuaries utilize both industry experience and the Company’s own experience to develop estimates of those amounts as of year-end. These estimated liabilities are subject to the impact of future changes in claim severity, frequency and other factors. In spite of the variability inherent in such estimates, management believes that the liabilities for unpaid losses and related loss adjustment reserve is adequate.
Insurance Premiums Revenue Recognition, Policy [Policy Text Block]	Premiums Premiums are recognized as income over the coverage period of the related policies. Unearned premiums represent the portion of premiums written that relate to the unexpired terms of the policies in force and are determined on a daily pro rata basis. The income is recorded to the commissions and fees line of the income statement.
Minimum
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	3 years
Maximum
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	15 years

Nature of Operations (Policies)	12 Months Ended
Nature of Operations (Policies)	Dec. 31, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Nature of Operations	Brown & Brown, Inc., a Florida corporation, and its subsidiaries (collectively, “Brown & Brown” or the “Company”) is a diversified insurance agency, wholesale brokerage, insurance programs and services organization that markets and sells to its customers, insurance products and services, primarily in the property and casualty area. Brown & Brown’s business is divided into four reportable segments: the Retail Segment provides a broad range of insurance products and services to commercial, public entity, professional and individual customers; the National Programs Segment, acting as a managing general agent (“MGA”), provides professional liability and related package products for certain professionals, a range of insurance products for individuals, flood coverage, and targeted products and services designated for specific industries, trade groups, governmental entities and market niches, all of which are delivered through nationwide networks of independent agents, and Brown & Brown retail agents; the Wholesale Brokerage Segment markets and sells excess and surplus commercial insurance, primarily through independent agents and brokers, as well as Brown & Brown Retail offices; and the Services Segment provides insurance-related services, including third-party claims administration and comprehensive medical utilization management services in both the workers’ compensation and all-lines liability arenas, as well as Medicare Set-aside services, Social Security disability and Medicare benefits advocacy services, and claims adjusting services. In addition, as the result of our acquisition of The Wright Insurance Group, LLC (“Wright”) in May 2014, we own a flood insurance carrier, Wright National Flood Insurance Company (“Wright Flood”), that is a Wright subsidiary. Wright Flood’s business consists of policies written pursuant to the National Flood Insurance Program, the program administered by the Federal Emergency Management Agency (“FEMA”), and several excess flood insurance policies, all of which are fully reinsured.
Recently Issued Accounting Pronouncements	Recently Issued Accounting Pronouncements In February 2016, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2016-02, “Leases (Topic 842)” (“ASU 2016-02”), which provides guidance for accounting for leases. Under ASU 2016-02, the Company will be required to recognize the assets and liabilities for the rights and obligations created by leased assets. ASU 2016-02 will take effect for public companies for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2018. The Company is currently evaluating its leases against the requirements of this pronouncement. In November 2015, FASB issued ASU No. 2015-17, “Income Taxes (Topic 740) - Balance Sheet Classification of Deferred Taxes” (“ASU 2015-17”), which simplifies the presentation of deferred income taxes by requiring deferred tax assets and liabilities be classified as a single non-current item on the balance sheet. ASU 2015-17 is effective for fiscal years beginning after December 15, 2016 with early adoption permitted as of the beginning of any interim or annual reporting period. The Company plans to adopt ASU 2015-17 in the first quarter of 2017. This is not expected to have a material impact on our Consolidated Financial Statements other than reclassifying current deferred tax assets and liabilities to non-current in the balance sheet. In September 2015, FASB issued ASU No. 2015-16, “Business Combinations (Topic 805): Simplifying the Accounting for Measurement-Period Adjustments” (“ASU 2015-16”), which requires that an acquirer recognize adjustments to provisional amounts that are identified during the measurement period in the reporting period in which the adjustment amounts are determined. ASU 2015-16 is effective for fiscal years, and interim reporting periods within those fiscal years, beginning after December 15, 2015. The Company has determined that the impact of the adoption of this guidance on the Consolidated Financial Statements would not be material. In August 2015, FASB issued ASU No. 2015-15, “Interest-Imputation of Interest (Subtopic 835-30): Presentation and Subsequent Measurement of Debt Issuance Costs Associated with Line-of-Credit Arrangements”. This standard is in addition to ASU No. 2015-03 and adds SEC paragraphs pursuant to an SEC Staff Announcement that the SEC staff would not object to an entity deferring and presenting debt issuance costs associated with a line-of-credit arrangement as an asset and subsequently amortizing the costs ratably over the term of the arrangement. The Company plans to adopt ASU 2015-03 in the first quarter of 2016. As the Company’s debt issuance costs are not material, implementation of this update is not expected to have a material impact on the Company’s Consolidated Financial Statements. In April 2015, FASB issued ASU No. 2015-05, “Intangibles-Goodwill and Other-Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Fees Paid in a Cloud Computing Arrangement” (“ASU 2015-05”), which issues guidance on determining whether a cloud computing arrangement contains a software license that should be accounted for as internal-use software. If a cloud computing arrangement does not contain a software license, it should be accounted for as a service contract. This guidance is effective for fiscal years beginning after December 15, 2015 and for interim periods within those fiscal years, with early adoption permitted. The Company has to this point not been a party to any material cloud computing arrangements and as such has determined the impact of the adoption of this guidance on the Consolidated Financial Statements to be immaterial. In April 2015, FASB issued ASU No. 2015-03, “Simplifying the Presentation of Debt Issuance Costs” (“ASU 2015-03”), which requires that debt issuance costs related to a recognized debt liability be presented in the balance sheet as a direct deduction from the carrying amount of that debt liability, consistent with debt discounts, and not recorded as separate assets. This update is effective for reporting periods beginning after December 15, 2015, and is to be applied on a retrospective basis. The Company plans to adopt ASU 2015-03 in the first quarter of 2016. As the Company’s debt issuance costs are not material, implementation of this update is not expected to have a material impact on the Company’s Consolidated Financial Statements. In August 2014, FASB issued ASU No. 2014-15, “Disclosure of Uncertainties About an Entity’s Ability to Continue as a Going Concern” (“ASU 2014-15”), which addresses management’s responsibility in evaluating whether there is substantial doubt about a company’s ability to continue as a going concern and to provide related footnote disclosures. ASU 2014-15 is effective for fiscal years beginning after December 15, 2016 and for interim periods within those fiscal years, with early adoption permitted. The Company does not expect to early adopt this guidance, and it believes the adoption of this guidance will not have an impact on the Consolidated Financial Statements. In May 2014, FASB issued ASU No. 2014-09, “Revenue from Contracts with Customers” (“ASU 2014-09”), which provides guidance for revenue recognition. ASU 2014-09 affects any entity that either enters into contracts with customers to transfer goods or services or enters into contracts for the transfer of non-financial assets, and supersedes the revenue recognition requirements in Topic 605, “Revenue Recognition,” and most industry-specific guidance. The standard’s core principle is that a company will recognize revenue when it transfers promised goods or services to customers in an amount that reflects the consideration to which a company expects to be entitled in exchange for those goods or services. In doing so, companies will need to use more judgment and make more estimates than under the current guidance. These may include identifying performance obligations in the contract, estimating the amount of variable consideration to include in the transaction price and allocating the transaction price to each separate performance obligation. ASU 2014-09 is effective for the Company beginning January 1, 2018, after FASB voted to delay the effective date by one year. At that time, the Company may adopt the new standard under the full retrospective approach or the modified retrospective approach. The Company is currently evaluating its revenue streams against the requirements of this pronouncement.

Net Income Per Share (Tables)

12 Months Ended

Dec. 31, 2015

Earnings Per Share [Abstract]

Reconciliation between Basic and Diluted Weighted Average Shares Outstanding

The following is a reconciliation between basic and diluted weighted average shares outstanding for the years ended December 31:



(in thousands, except per share data)	2015			2014			2013
Net income	$	243,318		$	206,896		$	217,112
Net income attributable to unvested awarded performance stock	(5,695		)	(5,186		)	(5,446		)
Net income attributable to common shares	$	237,623		$	201,710		$	211,666
Weighted average number of common shares outstanding – basic	141,113			144,568			144,662
Less unvested awarded performance stock included in weighted average number of common shares outstanding – basic	(3,303		)	(3,624		)	(3,629		)
Weighted average number of common shares outstanding for basic earnings per common share	137,810			140,944			141,033
Dilutive effect of stock options	2,302			1,947			1,591
Weighted average number of shares outstanding – diluted	140,112			142,891			142,624
Net income per share:
Basic	$	1.72		$	1.43		$	1.50
Diluted	$	1.70		$	1.41		$	1.48

Business Combinations (Tables)

12 Months Ended

Dec. 31, 2015

Dec. 31, 2014

Dec. 31, 2013

Business Combinations [Abstract]

Purchase price allocation for current year acquisitions and adjustments made for prior year acquisitions



(in thousands)
Name	Business Segment	Effective Date of Acquisition	Cash Paid		Other Payable		Recorded Earn-Out Payable		Net Assets Acquired		Maximum Potential Earn- Out Payable
Liberty Insurance Brokers, Inc. and Affiliates (Liberty)	Retail	February 1, 2015	$	12,000	$	—	$	2,981	$	14,981	$	3,750
Spain Agency, Inc. (Spain)	Retail	March 1, 2015	20,706		—		2,617		23,323		9,162
Bellingham Underwriters, Inc. (Bellingham)	National Programs	May 1, 2015	9,007		500		3,322		12,829		4,400
Fitness Insurance, LLC (Fitness)	Retail	June 1, 2015	9,455		—		2,379		11,834		3,500
Strategic Benefit Advisors, Inc. (SBA)	Retail	June 1, 2015	49,600		400		13,587		63,587		26,000
Bentrust Financial, Inc. (Bentrust)	Retail	December 1, 2015	10,142		391		319		10,852		2,200
MBA Insurance Agency of Arizona, Inc. (MBA)	Retail	December 1, 2015	68		8,442		6,063		14,573		9,500
Smith Insurance, Inc. (Smith)	Retail	December 1, 2015	12,096		200		1,047		13,343		6,350
Other	Various	Various	12,926		95		4,584		17,605		8,212
Total			$	136,000	$	10,028	$	36,899	$	182,927	$	73,074



(in thousands)
Name	Business Segment	Effective Date of Acquisition	Cash Paid		Other Payable		Recorded Earn-Out Payable		Net Assets Acquired		Maximum Potential Earn- Out Payable
The Wright Insurance Group, LLC	National Programs	May 1, 2014	$	609,183	$	1,471	$	—	$	610,654	$	—
Pacific Resources Benefits Advisors, LLC ("PacRes")	Retail	May 1, 2014	90,000		—		27,452		117,452		35,000
Axia Strategies, Inc ("Axia")	Wholesale Brokerage	May 1, 2014	9,870		—		1,824		11,694		5,200
Other	Various	Various	12,798		433		3,953		17,184		9,262
Total			$	721,851	$	1,904	$	33,229	$	756,984	$	49,462



(in thousands)
Name	Business Segment	Effective Date of Acquisition	Cash Paid		Other Payable		Recorded Earn-Out Payable		Net Assets Acquired		Maximum Potential Earn- Out Payable
The Rollins Agency, Inc.	Retail	June 1, 2013	$	13,792	$	50	$	2,321	$	16,163	$	4,300
Beecher Carlson Holdings, Inc.	Retail; National Programs	July 1, 2013	364,256		—		—		364,256		—
ICA, Inc.	Services	December 31, 2013	19,770		—		727		20,497		5,000
Other	Various	Various	10,254		502		2,043		12,799		7,468
Total			$	408,072	$	552	$	5,091	$	413,715	$	16,768

Estimated fair values of aggregate assets and liabilities acquired



(in thousands)	Liberty			Spain			Bellingham			Fitness			SBA		Bentrust			MBA			Smith			Other			Total
Other current assets	$	2,486		$	324		$	—		$	9		$	652	$	—		$	—		$	—		$	169		$	3,640
Fixed assets	40			50			25			17			41		36			33			73			59			374
Goodwill	10,010			15,748			9,608			8,105			39,859		8,166			13,471			10,374			21,040			136,381
Purchased customer accounts	4,506			7,430			3,223			3,715			23,000		2,789			7,338			3,526			(2,135		)	53,392
Non-compete agreements	24			21			21			—			21		43			11			31			156			328
Other assets	—			—			—			—			14		—			—			—			—			14
Total assets acquired	17,066			23,573			12,877			11,846			63,587		11,034			20,853			14,004			19,289			194,129
Other current liabilities	(42		)	(250		)	(48		)	(12		)	—		(182		)	(6,280		)	(504		)	(4,895		)	(12,213		)
Deferred income tax, net	—			—			—			—			—		—			—			—			2,576			2,576
Other liabilities	(2,043		)	—			—			—			—		—			—			(157		)	635			(1,565		)
Total liabilities assumed	(2,085		)	(250		)	(48		)	(12		)	—		(182		)	(6,280		)	(661		)	(1,684		)	(11,202		)
Net assets acquired	$	14,981		$	23,323		$	12,829		$	11,834		$	63,587	$	10,852		$	14,573		$	13,343		$	17,605		$	182,927

The following table summarizes the estimated fair values of the aggregate assets and liabilities acquired as of the date of each acquisition.



(in thousands)	Wright			PacRes			Axia		Other			Total
Cash	$	25,365		$	—		$	—	$	—		$	25,365
Other current assets	16,474			3,647			101		742			20,964
Fixed assets	7,172			53			24		1,724			8,973
Reinsurance recoverable	25,238			—			—		—			25,238
Prepaid reinsurance premiums	289,013			—			—		—			289,013
Goodwill	420,209			76,023			7,276		10,417			513,925
Purchased customer accounts	213,677			38,111			4,252		4,384			260,424
Non-compete agreements	966			21			41		166			1,194
Other assets	20,045			—			—		—			20,045
Total assets acquired	1,018,159			117,855			11,694		17,433			1,165,141
Other current liabilities	(14,322		)	(403		)	—		(249		)	(14,974		)
Losses and loss adjustment reserve	(25,238		)	—			—		—			(25,238		)
Unearned premiums	(289,013		)	—			—		—			(289,013		)
Deferred income tax, net	(46,566		)	—			—		—			(46,566		)
Other liabilities	(32,366		)	—			—		—			(32,366		)
Total liabilities assumed	(407,505		)	(403		)	—		(249		)	(408,157		)
Net assets acquired	$	610,654		$	117,452		$	11,694	$	17,184		$	756,984

The following table summarizes the estimated fair values of the aggregate assets and liabilities acquired as of the date of each acquisition.



(in thousands)	Rollins			Beecher			ICA		Other			Total
Cash	$	—		$	40,360		$	—	$	—		$	40,360
Other current assets	393			57,632			—		1,573			59,598
Fixed assets	30			1,786			75		24			1,915
Goodwill	12,697			265,174			12,377		5,696			295,944
Purchased customer accounts	3,878			101,565			7,917		5,623			118,983
Non-compete agreements	31			2,758			21		76			2,886
Other assets	—			—			107		1			108
Total assets acquired	17,029			469,275			20,497		12,993			519,794
Other current liabilities	(866		)	(80,090		)	—		(194		)	(81,150		)
Deferred income tax, net	—			(22,764		)	—		—			(22,764		)
Other liabilities	—			(2,165		)	—		—			(2,165		)
Total liabilities assumed	(866		)	(105,019		)	—		(194		)	(106,079		)
Net assets acquired	$	16,163		$	364,256		$	20,497	$	12,799		$	413,715

Unaudited pro forma results

These unaudited pro forma results are not necessarily indicative of the actual results of operations that would have occurred had the acquisitions actually been made at the beginning of the respective periods.



(UNAUDITED)	For the Year Ended December 31,
(in thousands, except per share data)	2015		2014
Total revenues	$	1,688,297	$	1,630,992
Income before income taxes	$	411,497	$	356,426
Net income	$	248,720	$	217,053
Net income per share:
Basic	$	1.76	$	1.50
Diluted	$	1.73	$	1.48
Weighted average number of shares outstanding:
Basic	137,810		140,944
Diluted	140,112		142,891



(UNAUDITED)	For the Year Ended December 31,
(in thousands, except per share data)	2014		2013
Total revenues	$	1,630,162	$	1,520,858
Income before income taxes	$	358,229	$	409,522
Net income	$	218,150	$	248,628
Net income per share:
Basic	$	1.51	$	1.72
Diluted	$	1.49	$	1.70
Weighted average number of shares outstanding:
Basic	140,944		141,033
Diluted	142,891		142,624



(UNAUDITED)	For the Year Ended December 31,
(in thousands, except per share data)	2013		2012
Total revenues	$	1,439,918	$	1,329,262
Income before income taxes	$	373,175	$	329,291
Net income	$	226,562	$	198,826
Net income per share:
Basic	$	1.57	$	1.39
Diluted	$	1.55	$	1.36
Weighted average number of shares outstanding:
Basic	141,033		139,634
Diluted	142,624		142,010

Schedule Of Business Acquisition Estimated Earn Out Payables Table [Text Block]

The resulting additions, payments, and net changes, as well as the interest expense accretion on the estimated acquisition earn-out payables, for the years ended December 31, 2015, 2014 and 2013 were as follows:



	For the Year Ended December 31,
(in thousands)	2015			2014			2013
Balance as of the beginning of the period	$	75,283		$	43,058		$	52,987
Additions to estimated acquisition earn-out payables	36,899			34,356			5,816
Payments for estimated acquisition earn-out payables	(36,798		)	(12,069		)	(18,278		)
Subtotal	75,384			65,345			40,525
Net change in earnings from estimated acquisition earn-out payables:
Change in fair value on estimated acquisition earn-out payables	2,990			7,375			570
Interest expense accretion	13			2,563			1,963
Net change in earnings from estimated acquisition earn-out payables	3,003			9,938			2,533
Balance as of December 31,	$	78,387		$	75,283		$	43,058

Goodwill (Tables)

12 Months Ended

Dec. 31, 2015

Goodwill and Intangible Assets Disclosure [Abstract]

Changes in Carrying Value of Goodwill by Operating Segment

The changes in the carrying value of goodwill by reportable segment for the years ended December 31, are as follows:



(in thousands)	Retail			National Programs			Wholesale Brokerage			Services			Total
Balance as of January 1, 2014	$	1,141,485		$	475,596		$	268,562		$	120,530		$	2,006,173
Goodwill of acquired businesses	94,080			420,063			47			(239		)	513,951
Goodwill disposed of relating to sales of businesses	(3,696		)	(9,564		)	(46,253		)	—			(59,513		)
Balance as of December 31, 2014	$	1,231,869		$	886,095		$	222,356		$	120,291		$	2,460,611
Goodwill of acquired businesses	113,767			18,009			4,605			—			136,381
Goodwill disposed of relating to sales of businesses	—			(2,238		)	—			(8,071		)	(10,309		)
Balance as of December 31, 2015	$	1,345,636		$	901,866		$	226,961		$	112,220		$	2,586,683

Amortizable Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2015

Goodwill and Intangible Assets Disclosure [Abstract]

Amortizable Intangible Assets

Amortizable intangible assets at December 31, 2015 and 2014 consisted of the following:



	December 31, 2015								December 31, 2014
(in thousands)	Gross Carrying Value		Accumulated Amortization			Net Carrying Value		Weighted Average Life (Years)(1)	Gross Carrying Value		Accumulated Amortization			Net Carrying Value		Weighted Average Life (Years)(1)
Purchased customer accounts	$	1,398,986	$	(656,799	)	$	742,187	15.0	$	1,355,550	$	(574,285	)	$	781,265	14.9
Non-compete agreements	29,440		(26,947		)	2,493		6.8	29,139		(25,762		)	3,377		6.8
Total	$	1,428,426	$	(683,746	)	$	744,680		$	1,384,689	$	(600,047	)	$	784,642


(1)	Weighted average life calculated as of the date of acquisition.

Investments (Tables)

12 Months Ended

Dec. 31, 2015

Investments, Debt and Equity Securities [Abstract]

Schedule of Investments in Fixed Maturity Securities

At December 31, 2015, the Company’s amortized cost and fair values of fixed maturity securities are summarized as follows:



(in thousands)	Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
U.S. Treasury securities, obligations of U.S. Government agencies and Municipals	$	11,876	$	6	$	(26	)	$	11,856
Foreign government	50		—		—			50
Corporate debt	4,505		7		(16		)	4,496
Short duration fixed income fund	1,663		27		—			1,690
Total	$	18,094	$	40	$	(42	)	$	18,092

At December 31, 2014, the Company’s amortized cost and fair values of fixed maturity securities are summarized as follows:



(in thousands)	Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
U.S. Treasury securities, obligations of U.S. Government agencies and Municipals	$	10,774	$	7	$	(1	)	$	10,780
Foreign government	50		—		—			50
Corporate debt	5,854		9		(11		)	5,852
Short duration fixed income fund	3,143		37		—			3,180
Total	$	19,821	$	53	$	(12	)	$	19,862

Summary of Unrealized Loss Position

he following table shows the investments’ gross unrealized loss and fair value, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position as of December 31, 2015:



(in thousands)	Less than 12 Months				12 Months or More				Total
	Fair Value		Unrealized Losses		Fair Value		Unrealized Losses		Fair Value		Unrealized Losses
U.S. Treasury securities, obligations of U.S. Government agencies and Municipals	$	8,998	$	26	$	—	$	—	$	8,998	$	26
Foreign Government	50		—		—		—		50		—
Corporate debt	2,731		14		284		2		3,015		16
Total	$	11,779	$	40	$	284	$	2	$	12,063	$	42



(in thousands)	Less than 12 Months				12 Months or More				Total
	Fair Value		Unrealized Losses		Fair Value		Unrealized Losses		Fair Value		Unrealized Losses
U.S. Treasury securities, obligations of U.S. Government agencies and Municipals	$	3,994	$	1	$	—	$	—	$	3,994	$	1
Foreign Government	50		—		—		—		50		—
Corporate debt	4,439		11		—		—		4,439		11
Total	$	8,483	$	12	$	—	$	—	$	8,483	$	12

Amortized Cost and Fair Value of Fixed Maturity Securities by Contractual Maturity

The amortized cost and estimated fair value of the fixed maturity securities at December 31, 2015 by contractual maturity are set forth below:



(in thousands)	Amortized Cost		Fair Value
Years to maturity:
Due in one year or less	$	5,726	$	5,722
Due after one year through five years	12,038		12,041
Due after five years through ten years	330		329
Total	$	18,094	$	18,092

The amortized cost and estimated fair value of the fixed maturity securities at December 31, 2014 by contractual maturity are set forth below:



(in thousands)	Amortized Cost		Fair Value
Years to maturity:
Due in one year or less	$	5,628	$	5,628
Due after one year through five years	13,863		13,897
Due after five years through ten years	330		337
Total	$	19,821	$	19,862

Fixed Assets (Tables)

12 Months Ended

Dec. 31, 2015

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment [Table Text Block]

Fixed assets at December 31 consisted of the following:



(in thousands)	2015			2014
Furniture, fixtures and equipment	$	169,682		$	161,539
Leasehold improvements	32,132			30,030
Land, buildings and improvements	3,370			3,739
Total cost	205,184			195,308
Less accumulated depreciation and amortization	(123,431		)	(110,640		)
Total	$	81,753		$	84,668

Depreciation and amortization expense for fixed assets amounted to $20.9 million in 2015, $20.9 million in 2014, and $17.5 million in 2013.

Accrued Expenses (Tables) - USD ($)
$ in Thousands

12 Months Ended

Dec. 31, 2015

Dec. 31, 2014

Payables and Accruals [Abstract]

Other Current Liabilities [Table Text Block]

$ 31,274

$ 23,384

Accrued expenses and other liabilities

192,067

181,156

Interest Payable, Current

6,375

6,527

Reserve for policy cancellations

9,617

9,074

Accrued Rent and Vendor Expenses

29,225

29,039

Accrued Employee Benefits, Current

39,366

36,241

Accrued Bonuses

$ 76,210

$ 76,891

Accounts Payable, Accrued Liabilities, and Other Liabilities Disclosure, Current [Text Block]

Accrued Expenses and Other Liabilities

Accrued expenses and other liabilities at December 31 consisted of the following:



(in thousands)	2015		2014
Accrued bonuses	$	76,210	$	76,891
Accrued compensation and benefits	39,366		36,241
Accrued rent and vendor expenses	29,225		29,039
Reserve for policy cancellations	9,617		9,074
Accrued interest	6,375		6,527
Other	31,274		23,384
Total	$	192,067	$	181,156

Schedule of Accrued Liabilities [Table Text Block]

Accrued expenses and other liabilities at December 31 consisted of the following:



(in thousands)	2015		2014
Accrued bonuses	$	76,210	$	76,891
Accrued compensation and benefits	39,366		36,241
Accrued rent and vendor expenses	29,225		29,039
Reserve for policy cancellations	9,617		9,074
Accrued interest	6,375		6,527
Other	31,274		23,384
Total	$	192,067	$	181,156

Long-Term Debt (Tables)

12 Months Ended

Dec. 31, 2015

Debt Disclosure [Abstract]

Long-Term Debt Instrument

Long-term debt at December 31, 2015 and 2014 consisted of the following:



(in thousands)	December 31, 2015		December 31, 2014
Current portion of long-term debt:
Current portion of 5-year term loan facility expires 2019	$	48,125	$	20,625
5.370% senior notes, Series D, quarterly interest payments, balloon due 2015	—		25,000
5.660% senior notes, Series C, semi-annual interest payments, balloon due 2016	25,000		—
Total current portion of long-term debt	73,125		45,625
Long-term debt:
Note agreements:
5.660% senior notes, Series C, semi-annual interest payments, balloon due 2016	—		25,000
4.500% senior notes, Series E, quarterly interest payments, balloon due 2018	100,000		100,000
4.200% senior notes, semi-annual interest payments, balloon due 2024	498,628		498,471
Total notes	598,628		623,471
Credit agreements:
5-year term-loan facility, periodic interest and principal payments, currently LIBOR plus up to 1.75%, expires May 20, 2019	481,250		529,375
5-year revolving-loan facility, periodic interest payments, currently LIBOR plus up to 1.50%, plus commitment fees up to 0.25%, expires May 20, 2019	—		—
Revolving credit loan, quarterly interest payments, LIBOR plus up to 1.40% and availability fee up to 0.25%, expires December 31, 2016	—		—
Total credit agreements	481,250		529,375
Total long-term debt	1,079,878		1,152,846
Current portion of long-term debt	73,125		45,625
Total debt	$	1,153,003	$	1,198,471

- Definition

Tabular disclosure of long-debt instruments or arrangements, including identification, terms, features, collateral requirements and other information necessary to a fair presentation. These are debt arrangements that originally required repayment more than twelve months after issuance or greater than the normal operating cycle of the entity, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21475-112644

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 470
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6479336&loc=d3e64711-112823

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(e),(f))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=34725769&loc=d3e28878-108400

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21538-112644

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21506-112644

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 1A
-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28541-108399

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399

Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21521-112644

Reference 11: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 22
-Article 5

+ Details

Income Taxes (Tables) - USD ($)
$ in Thousands

12 Months Ended

Dec. 31, 2015

Dec. 31, 2014

Dec. 31, 2013

Income Tax Contingency [Line Items]

Significant Components of Current Deferred Tax Assets

Significant components of Brown & Brown’s current deferred tax assets as of December 31 are as follows:



(in thousands)	2015		2014
Current deferred tax assets:
Deferred profit-sharing contingent commissions	$	9,767	$	10,335
Net operating loss carryforwards	10		951
Accruals and reserves	14,858		14,145
Total current deferred tax assets	$	24,635	$	25,431

Schedule of Deferred Tax Assets and Liabilities [Table Text Block]

Significant components of Brown & Brown’s non-current deferred tax liabilities and assets as of December 31 are as follows:



(in thousands)	2015			2014
Non-current deferred tax liabilities:
Fixed assets	$	8,585		$	10,368
Net unrealized holding (loss)/gain on available-for-sale securities	(9		)	56
Intangible assets	393,251			364,938
Total non-current deferred tax liabilities	401,827			375,362
Non-current deferred tax assets:
Deferred compensation	38,966			31,580
Net operating loss carryforwards	2,518			2,796
Valuation allowance for deferred tax assets	(606		)	(511		)
Total non-current deferred tax assets	40,878			33,865
Net non-current deferred tax liability	$	360,949		$	341,497

Income Tax Disclosure [Text Block]

Income Taxes

Significant components of the provision for income taxes for the years ended December 31 are as follows:



(in thousands)	2015		2014			2013
Current:
Federal	$	118,490	$	109,893		$	94,007
State	17,625		15,482			13,438
Foreign	430		109			805
Total current provision	136,545		125,484			108,250
Deferred:
Federal	18,416		5,987			28,469
State	4,280		1,440			3,723
Foreign	—		(58		)	55
Total deferred provision	22,696		7,369			32,247
Total tax provision	$	159,241	$	132,853		$	140,497

A reconciliation of the differences between the effective tax rate and the federal statutory tax rate for the years ended December 31 is as follows:



	2015	2014	2013
Federal statutory tax rate	35.0%	35.0%	35.0%
State income taxes, net of federal income tax benefit	3.9	3.3	3.5
Non-deductible employee stock purchase plan expense	0.3	0.3	0.3
Non-deductible meals and entertainment	0.3	0.4	0.3
Other, net	0.1	0.1	0.2
Effective tax rate	39.6%	39.1%	39.3%

Significant components of Brown & Brown’s current deferred tax assets as of December 31 are as follows:



(in thousands)	2015		2014
Current deferred tax assets:
Deferred profit-sharing contingent commissions	$	9,767	$	10,335
Net operating loss carryforwards	10		951
Accruals and reserves	14,858		14,145
Total current deferred tax assets	$	24,635	$	25,431

Significant components of Brown & Brown’s non-current deferred tax liabilities and assets as of December 31 are as follows:



(in thousands)	2015			2014
Non-current deferred tax liabilities:
Fixed assets	$	8,585		$	10,368
Net unrealized holding (loss)/gain on available-for-sale securities	(9		)	56
Intangible assets	393,251			364,938
Total non-current deferred tax liabilities	401,827			375,362
Non-current deferred tax assets:
Deferred compensation	38,966			31,580
Net operating loss carryforwards	2,518			2,796
Valuation allowance for deferred tax assets	(606		)	(511		)
Total non-current deferred tax assets	40,878			33,865
Net non-current deferred tax liability	$	360,949		$	341,497

Income taxes paid in 2015, 2014 and 2013 were $132.9 million, $118.3 million, and $110.2 million respectively.

A reconciliation of the beginning and ending amount of unrecognized tax benefits is as follows:



(in thousands)	2015			2014			2013
Unrecognized tax benefits balance at January 1	$	113		$	391		$	294
Gross increases for tax positions of prior years	773			—			232
Gross decreases for tax positions of prior years	—			(21		)	—
Settlements	(302		)	(257		)	(135		)
Unrecognized tax benefits balance at December 31	$	584		$	113		$	391

Summary of Income Tax Contingencies [Table Text Block]

$ 22,696

$ 7,369

$ 32,247

Summary of Positions for which Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Table Text Block]

A reconciliation of the beginning and ending amount of unrecognized tax benefits is as follows:



(in thousands)	2015			2014			2013
Unrecognized tax benefits balance at January 1	$	113		$	391		$	294
Gross increases for tax positions of prior years	773			—			232
Gross decreases for tax positions of prior years	—			(21		)	—
Settlements	(302		)	(257		)	(135		)
Unrecognized tax benefits balance at December 31	$	584		$	113		$	391

Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]

Significant components of the provision for income taxes for the years ended December 31 are as follows:



(in thousands)	2015		2014			2013
Current:
Federal	$	118,490	$	109,893		$	94,007
State	17,625		15,482			13,438
Foreign	430		109			805
Total current provision	136,545		125,484			108,250
Deferred:
Federal	18,416		5,987			28,469
State	4,280		1,440			3,723
Foreign	—		(58		)	55
Total deferred provision	22,696		7,369			32,247
Total tax provision	$	159,241	$	132,853		$	140,497

Stock Based Compensation (Tables) - USD ($)
$ in Thousands

12 Months Ended

Dec. 31, 2015

Dec. 31, 2014

Dec. 31, 2013

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Share-based Compensation

$ 15,513

$ 19,363

$ 22,603

Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]

A summary of PSP activity for the years ended December 31, 2015, 2014 and 2013 is as follows:



	Weighted- Average Grant Date Fair Value		Granted Shares		Awarded Shares		Shares Not Yet Awarded
Outstanding at January 1, 2013	$	8.72	3,691,022		2,394,505		1,296,517
Granted	$	—	—		—		—
Awarded	$	10.25	—		122,021		(122,021	)
Vested	$	4.01	(119,364	)	(119,364	)	—
Forfeited	$	8.73	(1,200,371	)	(101,310	)	(1,099,061	)
Outstanding at December 31, 2013	$	8.62	2,371,287		2,295,852		75,435
Granted	$	—	—		—		—
Awarded	$	—	—		—		—
Vested	$	16.76	(277,009	)	(277,009	)	—
Forfeited	$	9.75	(165,647	)	(115,630	)	(50,017	)
Outstanding at December 31, 2014	$	8.71	1,928,631		1,903,213		25,418
Granted	$	—	—		—		—
Awarded	$	—	—		—		—
Vested	$	5.55	(208,889	)	(208,889	)	—
Forfeited	$	9.78	(117,528	)	(100,110	)	(17,418	)
Outstanding at December 31, 2015	$	9.03	1,602,214		1,594,214		8,000

A summary of stock option activity for the years ended December 31, 2015, 2014 and 2013 is as follows:



Stock Options	Shares Under Option		Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Term (in years)	Aggregate Intrinsic Value (in thousands)
Outstanding at January 1, 2013	738,792		$	18.39	4.9	$	8,891
Granted	—		$	—
Exercised	(115,847	)	$	17.56
Forfeited	—		$	—
Expired	—		$	—
Outstanding at December 31, 2013	622,945		$	18.55	4.1	$	7,289
Granted	—		$	—
Exercised	(106,589	)	$	18.48
Forfeited	(46,000	)	$	18.48
Expired	—		$	—
Outstanding at December 31, 2014	470,356		$	18.57	3.1	$	5,087
Granted	—		$	—
Exercised	(151,767	)	$	18.48
Forfeited	(49,000	)	$	19.36
Expired	—		$	—
Outstanding at December 31, 2015	269,589		$	18.48	2.2	$	2,395
Ending vested and expected to vest at December 31, 2015	269,589		$	18.48	2.2	$	2,395
Exercisable at December 31, 2015	164,589		$	18.48	2.2	$	2,241
Exercisable at December 31, 2014	316,356		$	18.48	3.2	$	4,565
Exercisable at December 31, 2013	422,945		$	18.48	4.2	$	5,460

A summary of SIP activity for the years ended December 31, 2015, 2014 and 2013 is as follows:



	Weighted- Average Grant Date Fair Value		Granted Shares		Awarded Shares		Shares Not Yet Awarded
Outstanding at January 1, 2013	$	22.91	3,157,311		37,408		3,119,903
Granted	$	31.95	3,719,974		—		3,719,974
Awarded	$	30.71	—		966,215		(966,215	)
Vested	$	—	—		—		—
Forfeited	$	23.88	(271,184	)	(7,906	)	(263,278	)
Outstanding at December 31, 2013	$	27.96	6,606,101		995,717		5,610,384
Granted	$	31.02	422,572		113,088		309,484
Awarded	$	—	—		—		—
Vested	$	—	—		—		—
Forfeited	$	27.41	(369,626	)	(47,915	)	(321,711	)
Outstanding at December 31, 2014	$	28.19	6,659,047		1,060,890		5,598,157
Granted	$	31.74	481,166		164,646		316,520
Awarded	$	—	—		—		—
Vested	$	—	—		—		—
Forfeited	$	26.32	(863,241	)	(95,542	)	(767,699	)
Outstanding at December 31, 2015	$	28.74	6,276,972		1,129,994		5,146,978

Stock Incentive Plan [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Share-based Compensation

$ 11,111

14,447

15,934

PerformanceStockPlan [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Share-based Compensation

972

2,354

2,310

Employee Stock [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Share-based Compensation

$ 3,430

$ 2,425

$ 3,538

Stock Based Compensation Summary of Stock Based Compensation Plan Activity (Tables)

12 Months Ended

Dec. 31, 2015

Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]

Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]

A summary of PSP activity for the years ended December 31, 2015, 2014 and 2013 is as follows:



	Weighted- Average Grant Date Fair Value		Granted Shares		Awarded Shares		Shares Not Yet Awarded
Outstanding at January 1, 2013	$	8.72	3,691,022		2,394,505		1,296,517
Granted	$	—	—		—		—
Awarded	$	10.25	—		122,021		(122,021	)
Vested	$	4.01	(119,364	)	(119,364	)	—
Forfeited	$	8.73	(1,200,371	)	(101,310	)	(1,099,061	)
Outstanding at December 31, 2013	$	8.62	2,371,287		2,295,852		75,435
Granted	$	—	—		—		—
Awarded	$	—	—		—		—
Vested	$	16.76	(277,009	)	(277,009	)	—
Forfeited	$	9.75	(165,647	)	(115,630	)	(50,017	)
Outstanding at December 31, 2014	$	8.71	1,928,631		1,903,213		25,418
Granted	$	—	—		—		—
Awarded	$	—	—		—		—
Vested	$	5.55	(208,889	)	(208,889	)	—
Forfeited	$	9.78	(117,528	)	(100,110	)	(17,418	)
Outstanding at December 31, 2015	$	9.03	1,602,214		1,594,214		8,000

A summary of stock option activity for the years ended December 31, 2015, 2014 and 2013 is as follows:



Stock Options	Shares Under Option		Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Term (in years)	Aggregate Intrinsic Value (in thousands)
Outstanding at January 1, 2013	738,792		$	18.39	4.9	$	8,891
Granted	—		$	—
Exercised	(115,847	)	$	17.56
Forfeited	—		$	—
Expired	—		$	—
Outstanding at December 31, 2013	622,945		$	18.55	4.1	$	7,289
Granted	—		$	—
Exercised	(106,589	)	$	18.48
Forfeited	(46,000	)	$	18.48
Expired	—		$	—
Outstanding at December 31, 2014	470,356		$	18.57	3.1	$	5,087
Granted	—		$	—
Exercised	(151,767	)	$	18.48
Forfeited	(49,000	)	$	19.36
Expired	—		$	—
Outstanding at December 31, 2015	269,589		$	18.48	2.2	$	2,395
Ending vested and expected to vest at December 31, 2015	269,589		$	18.48	2.2	$	2,395
Exercisable at December 31, 2015	164,589		$	18.48	2.2	$	2,241
Exercisable at December 31, 2014	316,356		$	18.48	3.2	$	4,565
Exercisable at December 31, 2013	422,945		$	18.48	4.2	$	5,460

A summary of SIP activity for the years ended December 31, 2015, 2014 and 2013 is as follows:



	Weighted- Average Grant Date Fair Value		Granted Shares		Awarded Shares		Shares Not Yet Awarded
Outstanding at January 1, 2013	$	22.91	3,157,311		37,408		3,119,903
Granted	$	31.95	3,719,974		—		3,719,974
Awarded	$	30.71	—		966,215		(966,215	)
Vested	$	—	—		—		—
Forfeited	$	23.88	(271,184	)	(7,906	)	(263,278	)
Outstanding at December 31, 2013	$	27.96	6,606,101		995,717		5,610,384
Granted	$	31.02	422,572		113,088		309,484
Awarded	$	—	—		—		—
Vested	$	—	—		—		—
Forfeited	$	27.41	(369,626	)	(47,915	)	(321,711	)
Outstanding at December 31, 2014	$	28.19	6,659,047		1,060,890		5,598,157
Granted	$	31.74	481,166		164,646		316,520
Awarded	$	—	—		—		—
Vested	$	—	—		—		—
Forfeited	$	26.32	(863,241	)	(95,542	)	(767,699	)
Outstanding at December 31, 2015	$	28.74	6,276,972		1,129,994		5,146,978

Stock Based Compensation Stock Options Outstanding (Tables)

12 Months Ended

Dec. 31, 2015

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]

A summary of PSP activity for the years ended December 31, 2015, 2014 and 2013 is as follows:



	Weighted- Average Grant Date Fair Value		Granted Shares		Awarded Shares		Shares Not Yet Awarded
Outstanding at January 1, 2013	$	8.72	3,691,022		2,394,505		1,296,517
Granted	$	—	—		—		—
Awarded	$	10.25	—		122,021		(122,021	)
Vested	$	4.01	(119,364	)	(119,364	)	—
Forfeited	$	8.73	(1,200,371	)	(101,310	)	(1,099,061	)
Outstanding at December 31, 2013	$	8.62	2,371,287		2,295,852		75,435
Granted	$	—	—		—		—
Awarded	$	—	—		—		—
Vested	$	16.76	(277,009	)	(277,009	)	—
Forfeited	$	9.75	(165,647	)	(115,630	)	(50,017	)
Outstanding at December 31, 2014	$	8.71	1,928,631		1,903,213		25,418
Granted	$	—	—		—		—
Awarded	$	—	—		—		—
Vested	$	5.55	(208,889	)	(208,889	)	—
Forfeited	$	9.78	(117,528	)	(100,110	)	(17,418	)
Outstanding at December 31, 2015	$	9.03	1,602,214		1,594,214		8,000

A summary of stock option activity for the years ended December 31, 2015, 2014 and 2013 is as follows:



Stock Options	Shares Under Option		Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Term (in years)	Aggregate Intrinsic Value (in thousands)
Outstanding at January 1, 2013	738,792		$	18.39	4.9	$	8,891
Granted	—		$	—
Exercised	(115,847	)	$	17.56
Forfeited	—		$	—
Expired	—		$	—
Outstanding at December 31, 2013	622,945		$	18.55	4.1	$	7,289
Granted	—		$	—
Exercised	(106,589	)	$	18.48
Forfeited	(46,000	)	$	18.48
Expired	—		$	—
Outstanding at December 31, 2014	470,356		$	18.57	3.1	$	5,087
Granted	—		$	—
Exercised	(151,767	)	$	18.48
Forfeited	(49,000	)	$	19.36
Expired	—		$	—
Outstanding at December 31, 2015	269,589		$	18.48	2.2	$	2,395
Ending vested and expected to vest at December 31, 2015	269,589		$	18.48	2.2	$	2,395
Exercisable at December 31, 2015	164,589		$	18.48	2.2	$	2,241
Exercisable at December 31, 2014	316,356		$	18.48	3.2	$	4,565
Exercisable at December 31, 2013	422,945		$	18.48	4.2	$	5,460

A summary of SIP activity for the years ended December 31, 2015, 2014 and 2013 is as follows:



	Weighted- Average Grant Date Fair Value		Granted Shares		Awarded Shares		Shares Not Yet Awarded
Outstanding at January 1, 2013	$	22.91	3,157,311		37,408		3,119,903
Granted	$	31.95	3,719,974		—		3,719,974
Awarded	$	30.71	—		966,215		(966,215	)
Vested	$	—	—		—		—
Forfeited	$	23.88	(271,184	)	(7,906	)	(263,278	)
Outstanding at December 31, 2013	$	27.96	6,606,101		995,717		5,610,384
Granted	$	31.02	422,572		113,088		309,484
Awarded	$	—	—		—		—
Vested	$	—	—		—		—
Forfeited	$	27.41	(369,626	)	(47,915	)	(321,711	)
Outstanding at December 31, 2014	$	28.19	6,659,047		1,060,890		5,598,157
Granted	$	31.74	481,166		164,646		316,520
Awarded	$	—	—		—		—
Vested	$	—	—		—		—
Forfeited	$	26.32	(863,241	)	(95,542	)	(767,699	)
Outstanding at December 31, 2015	$	28.74	6,276,972		1,129,994		5,146,978

Schedule of Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding [Table Text Block]

The following table summarizes information about stock options outstanding at December 31, 2015:



Options Outstanding					Options Exercisable
Exercise Price	Number Outstanding	Weighted Average Remaining Contractual Life (years)	Weighted Average Exercise Price		Number Exercisable	Weighted Average Exercise Price
$18.48	269,589	2.2	$	18.48	164,589	$	18.48
Totals	269,589	2.2	$	18.48	164,589	$	18.48

Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2015

Commitments and Contingencies Disclosure [Abstract]

Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]



(in thousands)
2016	$	40,900
2017	37,109
2018	31,612
2019	25,962
2020	21,283
Thereafter	38,406
Total minimum future lease payments	$	195,272

Rental expense in 2015, 2014 and 2013 for operating leases totaled $46.0 million, $49.0 million, and $43.0 million, respectively.

Quarterly Operating Results (Tables)

12 Months Ended

Dec. 31, 2015

Quarterly Financial Information Disclosure [Abstract]

Schedule of Quarterly Financial Information [Table Text Block]

Quarterly operating results for 2015 and 2014 were as follows:



(in thousands, except per share data)	First Quarter		Second Quarter		Third Quarter		Fourth Quarter
2015
Total revenues	$	404,298	$	419,447	$	432,167	$	404,597
Total expenses	$	310,520	$	318,533	$	319,337	$	309,560
Income before income taxes	$	93,778	$	100,914	$	112,830	$	95,037
Net income	$	56,951	$	61,005	$	67,427	$	57,935
Net income per share:
Basic	$	0.40	$	0.43	$	0.48	$	0.41
Diluted	$	0.39	$	0.43	$	0.47	$	0.41
2014
Total revenues	$	363,594	$	397,764	$	421,418	$	393,020
Total expenses	$	276,757	$	295,983	$	308,733	$	354,574	⁽¹⁾
Income before income taxes	$	86,837	$	101,781	$	112,685	$	38,446	⁽¹⁾
Net income	$	52,415	$	61,755	$	68,331	$	24,395	⁽¹⁾
Net income per share:
Basic	$	0.36	$	0.43	$	0.47	$	0.17
Diluted	$	0.36	$	0.42	$	0.47	$	0.17


(1)	The Company recognized a pre-tax loss on disposal of $47.4 million as a result of the sale of Axiom effective December 31, 2014. The sale was part of the Company’s strategy to exit the reinsurance brokerage business.

Segment Information (Tables)

12 Months Ended

Dec. 31, 2015

Segment Reporting Information [Line Items]

Segment Information

Segment results for prior periods have been recast to reflect the current year segmental structure. Certain reclassifications

have been made to the prior-year amounts reported in this Annual Report on Form 10-K in order to conform to the current year

presentation.



	For the year ended December 31, 2015
(in thousands)	Retail		National Programs		Wholesale Brokerage		Services		Other			Total
Total revenues	$	870,346	$	428,734	$	216,996	$	145,365	$	(932	)	$	1,660,509
Investment income	$	87	$	210	$	150	$	42	$	515		$	1,004
Amortization	$	45,145	$	28,479	$	9,739	$	4,019	$	39		$	87,421
Depreciation	$	6,558	$	7,250	$	2,142	$	1,988	$	2,952		$	20,890
Interest expense	$	41,036	$	55,705	$	891	$	5,970	$	(64,354	)	$	39,248
Income before income taxes	$	181,938	$	67,673	$	64,708	$	19,713	$	68,527		$	402,559
Total assets	$	3,507,476	$	2,505,752	$	895,782	$	285,459	$	(2,181,730	)	$	5,012,739
Capital expenditures	$	6,797	$	6,001	$	3,084	$	1,088	$	1,405		$	18,375



	For the year ended December 31, 2014
(in thousands)	Retail		National Programs		Wholesale Brokerage		Services		Other			Total
Total revenues	$	823,686	$	404,239	$	211,911	$	136,558	$	(598	)	$	1,575,796
Investment income	$	67	$	164	$	26	$	3	$	487		$	747
Amortization	$	42,935	$	25,129	$	10,703	$	4,135	$	39		$	82,941
Depreciation	$	6,449	$	7,805	$	2,470	$	2,213	$	1,958		$	20,895
Interest expense	$	43,502	$	49,663	$	1,294	$	7,678	$	(73,729	)	$	28,408
Income before income taxes	$	157,491	$	73,178	$	8,276	$	17,870	$	82,934		$	339,749
Total assets	$	3,229,484	$	2,455,749	$	857,804	$	296,034	$	(1,882,613	)	$	4,956,458
Capital expenditures	$	6,873	$	14,133	$	1,526	$	1,210	$	1,181		$	24,923



	For the year ended December 31, 2013
(in thousands)	Retail		National Programs		Wholesale Brokerage		Services		Other			Total
Total revenues	$	737,349	$	301,372	$	193,710	$	131,489	$	(641	)	$	1,363,279
Investment income	$	82	$	19	$	22	$	1	$	514		$	638
Amortization	$	38,523	$	14,953	$	10,719	$	3,698	$	39		$	67,932
Depreciation	$	5,874	$	5,492	$	2,674	$	1,623	$	1,822		$	17,485
Interest expense	$	34,658	$	24,014	$	2,316	$	7,322	$	(51,870	)	$	16,440
Income before income taxes	$	161,787	$	61,223	$	47,501	$	25,791	$	61,307		$	357,609
Total assets	$	3,012,688	$	1,377,404	$	865,731	$	277,652	$	(1,883,967	)	$	3,649,508
Capital expenditures	$	6,886	$	4,810	$	1,825	$	1,811	$	1,034		$	16,366

Summary of Significant Accounting Policies Fair Value of Financial Instruments (Details) $ in Millions	Dec. 31, 2015 USD ($)
Text Block [Abstract]
Long-term Debt, Fair Value	$ 623.6
Short-term Debt	$ 25.0

Net Income Per Share - Reconciliation between Basic and Diluted Weighted Average Shares Outstanding (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Earnings Per Share [Abstract]
Net income	$ 57,935	$ 67,427	$ 61,005	$ 56,951	$ 24,395	$ 68,331	$ 61,755	$ 52,415	$ 243,318	$ 206,896	$ 217,112
Net income attributable to unvested awarded performance stock									(5,695)	(5,186)	(5,446)
Net income attributable to common shares									$ 237,623	$ 201,710	$ 211,666
Weighted average number of common shares outstanding - basic (in shares)									141,113	144,568	144,662
Less unvested awarded performance stock included in weighted average number of common shares outstanding - basic (in shares)									(3,303)	(3,624)	(3,629)
Weighted average number of common shares outstanding for basic earnings per common share (in shares)									137,810	140,944	141,033
Dilutive effect of stock options (in shares)									2,302	1,947	1,591
Weighted average number of shares outstanding - diluted (in shares)									140,112	142,891	142,624
Basic (in dollars per share)	$ 0.0041	$ 0.0048	$ 0.0043	$ 0.0040	$ 0.0017	$ 0.0047	$ 0.0043	$ 0.0036	$ 1.72	$ 1.43	$ 1.50
Diluted (in dollars per share)	$ 0.0041	$ 0.0047	$ 0.0043	$ 0.0039	$ 0.0017	$ 0.0047	$ 0.0042	$ 0.0036	$ 1.70	$ 1.41	$ 1.48

Business Combinations - Additional Information (Detail)	12 Months Ended
Business Combinations - Additional Information (Detail)	Dec. 31, 2015 USD ($) acquisition customer_account	Dec. 31, 2014 USD ($) acquisition	Dec. 31, 2013 USD ($) acquisition	Dec. 31, 2012 USD ($)
Business Acquisition [Line Items]
Maximum Future Contingency payments Acquisitions	$ 137,400,000
Number of acquisitions \| acquisition	13	10
Aggregate purchase price of acquisitions	$ 503,442	$ 25,941	$ 504,300
Payments to Acquire Businesses, Gross	136,000,000	721,851,000	408,072,000
Goodwill assigned	136,381,000	513,925,000	295,944,000
Goodwill currently deductible for income tax purposes	91,100,000	141,900,000	41,600,000
Goodwill currently non-deductible for income tax purposes	8,400,000	338,800,000	249,200,000
Goodwill related to the recorded earn-out payables	36,900,000	33,200,000	5,100,000
Total revenues related to acquisitions	28,200,000	112,200,000	63,800,000
Income before income taxes related to acquisitions	1,500,000	(1,300,000)	900,000
Estimated acquisition earn-out payables	78,387,000	75,283,000	43,058,000	$ 52,987,000
Accounts payable
Business Acquisition [Line Items]
Estimated acquisition earn-out payables	$ 25,300,000	$ 26,000,000	$ 6,300,000
Purchased customer accounts
Business Acquisition [Line Items]
Weighted average life (years)	15 years	15 years	15 years
Non-compete agreements
Business Acquisition [Line Items]
Weighted average life (years)	5 years	3 years 5 months	5 years
Retail
Business Acquisition [Line Items]
Goodwill assigned	$ 113,800,000	$ 86,400,000	$ 257,200,000
National Programs
Business Acquisition [Line Items]
Goodwill assigned	18,000,000	420,000,000	27,100,000
Wholesale Brokerage [Member]
Business Acquisition [Line Items]
Goodwill assigned	4,600,000	7,700,000	(800,000)
Services [Member]
Business Acquisition [Line Items]
Goodwill assigned		(200,000)	12,400,000
Other non-current liability
Business Acquisition [Line Items]
Estimated acquisition earn-out payables	$ 53,100,000	$ 49,300,000	$ 36,800,000
Asset Acquisitions [Member]
Business Acquisition [Line Items]
Number of acquisitions \| acquisition	13	9	8
Book of Business Purchases [Member]
Business Acquisition [Line Items]
Number of acquisitions	4	5	1
Stock Acquisitions [Member]
Business Acquisition [Line Items]
Number of acquisitions \| acquisition	0	1	1

Business Combinations - Acquisitions Accounted for Business Combinations (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Business Combination, Separately Recognized Transactions [Line Items]
Cash Paid	$ 136,000	$ 721,851	$ 408,072
Other Payable	10,028	1,904	552
Recorded Earn-Out Payable	36,899	33,229	5,091
Net Assets Acquired	182,927	756,984	413,715
Maximum Potential Earn- Out Payable	73,074	49,462	16,768
Liberty Insurance Brokers, Inc. and Affiliates [Member]
Business Combination, Separately Recognized Transactions [Line Items]
Net Assets Acquired	$ 14,981
Liberty Insurance Brokers, Inc. and Affiliates [Member] \| Retail
Business Combination, Separately Recognized Transactions [Line Items]
Effective Date of Acquisition	Feb. 01, 2015
Cash Paid	$ 12,000
Other Payable	0
Recorded Earn-Out Payable	2,981
Net Assets Acquired	14,981
Maximum Potential Earn- Out Payable	3,750
Wright Insurance Group Llc [Member]
Business Combination, Separately Recognized Transactions [Line Items]
Net Assets Acquired		$ 610,654
Wright Insurance Group Llc [Member] \| National Programs
Business Combination, Separately Recognized Transactions [Line Items]
Effective Date of Acquisition		May 01, 2014
Cash Paid		$ 609,183
Other Payable		1,471
Recorded Earn-Out Payable		0
Net Assets Acquired		610,654
Maximum Potential Earn- Out Payable		0
Wright Insurance Group Llc [Member]
Business Combination, Separately Recognized Transactions [Line Items]
Net Assets Acquired			$ 16,163
Wright Insurance Group Llc [Member] \| Retail
Business Combination, Separately Recognized Transactions [Line Items]
Effective Date of Acquisition			Jun. 01, 2013
Cash Paid			$ 13,792
Other Payable			50
Recorded Earn-Out Payable			2,321
Net Assets Acquired			16,163
Maximum Potential Earn- Out Payable			4,300
Beecher Carlson Holdings [Member]
Business Combination, Separately Recognized Transactions [Line Items]
Net Assets Acquired			$ 364,256
Beecher Carlson Holdings [Member] \| Various
Business Combination, Separately Recognized Transactions [Line Items]
Effective Date of Acquisition			Jul. 01, 2013
Cash Paid			$ 364,256
Other Payable			0
Recorded Earn-Out Payable			0
Net Assets Acquired			364,256
Maximum Potential Earn- Out Payable			0
Spain Agency, Inc. (Spain)
Business Combination, Separately Recognized Transactions [Line Items]
Net Assets Acquired	$ 23,323
Spain Agency, Inc. (Spain) \| Retail
Business Combination, Separately Recognized Transactions [Line Items]
Effective Date of Acquisition	Mar. 01, 2015
Cash Paid	$ 20,706
Other Payable	0
Recorded Earn-Out Payable	2,617
Net Assets Acquired	23,323
Maximum Potential Earn- Out Payable	9,162
Bellingham Underwriters, Inc. [Member]
Business Combination, Separately Recognized Transactions [Line Items]
Net Assets Acquired	$ 12,829
Bellingham Underwriters, Inc. [Member] \| National Programs
Business Combination, Separately Recognized Transactions [Line Items]
Effective Date of Acquisition	May 01, 2015
Bellingham Underwriters, Inc. [Member] \| National Programs Divisions [Member]
Business Combination, Separately Recognized Transactions [Line Items]
Cash Paid	$ 9,007
Other Payable	500
Recorded Earn-Out Payable	3,322
Net Assets Acquired	12,829
Maximum Potential Earn- Out Payable	4,400
Fitness Insurance, LLC [Member]
Business Combination, Separately Recognized Transactions [Line Items]
Net Assets Acquired	$ 11,834
Fitness Insurance, LLC [Member] \| Retail
Business Combination, Separately Recognized Transactions [Line Items]
Effective Date of Acquisition	Jun. 01, 2015
Cash Paid	$ 9,455
Other Payable	0
Recorded Earn-Out Payable	2,379
Net Assets Acquired	11,834
Maximum Potential Earn- Out Payable	3,500
Other
Business Combination, Separately Recognized Transactions [Line Items]
Net Assets Acquired	$ 63,587
Other \| Retail
Business Combination, Separately Recognized Transactions [Line Items]
Effective Date of Acquisition	Jun. 01, 2015
Cash Paid	$ 49,600
Other Payable	400
Recorded Earn-Out Payable	13,587
Net Assets Acquired	63,587
Maximum Potential Earn- Out Payable	26,000
Bentrust Financial, Inc. [Member]
Business Combination, Separately Recognized Transactions [Line Items]
Net Assets Acquired	$ 10,852
Bentrust Financial, Inc. [Member] \| Retail
Business Combination, Separately Recognized Transactions [Line Items]
Effective Date of Acquisition	Dec. 01, 2015
Cash Paid	$ 10,142
Other Payable	391
Recorded Earn-Out Payable	319
Net Assets Acquired	10,852
Maximum Potential Earn- Out Payable	2,200
MBA Insurance Agency of Arizona, Inc. [Member]
Business Combination, Separately Recognized Transactions [Line Items]
Net Assets Acquired	$ 14,573
MBA Insurance Agency of Arizona, Inc. [Member] \| Retail
Business Combination, Separately Recognized Transactions [Line Items]
Effective Date of Acquisition	Dec. 01, 2015
Cash Paid	$ 68
Other Payable	8,442
Recorded Earn-Out Payable	6,063
Net Assets Acquired	14,573
Maximum Potential Earn- Out Payable	9,500
Smith Insurance, Inc. [Member]
Business Combination, Separately Recognized Transactions [Line Items]
Net Assets Acquired	$ 13,343
Smith Insurance, Inc. [Member] \| Retail
Business Combination, Separately Recognized Transactions [Line Items]
Effective Date of Acquisition	Dec. 01, 2015
Cash Paid	$ 12,096
Other Payable	200
Recorded Earn-Out Payable	1,047
Net Assets Acquired	13,343
Maximum Potential Earn- Out Payable	6,350
Other Acquisitions [Member]
Business Combination, Separately Recognized Transactions [Line Items]
Net Assets Acquired	17,605	17,184	12,799
Other Acquisitions [Member] \| Various
Business Combination, Separately Recognized Transactions [Line Items]
Cash Paid	12,926		10,254
Other Payable	95		502
Recorded Earn-Out Payable	4,584		2,043
Net Assets Acquired	17,605		12,799
Maximum Potential Earn- Out Payable	$ 8,212		7,468
Pacific Resources Benefits Advisors [Member]
Business Combination, Separately Recognized Transactions [Line Items]
Net Assets Acquired		$ 117,452
Pacific Resources Benefits Advisors [Member] \| Retail
Business Combination, Separately Recognized Transactions [Line Items]
Effective Date of Acquisition		May 01, 2014
Cash Paid		$ 90,000
Other Payable		0
Recorded Earn-Out Payable		27,452
Net Assets Acquired		117,452
Maximum Potential Earn- Out Payable		35,000
Axia Strategies, Inc. [Member]
Business Combination, Separately Recognized Transactions [Line Items]
Net Assets Acquired		$ 11,694
Axia Strategies, Inc. [Member] \| Wholesale Brokerage [Member]
Business Combination, Separately Recognized Transactions [Line Items]
Effective Date of Acquisition		May 01, 2014
Cash Paid		$ 9,870
Other Payable		0
Recorded Earn-Out Payable		1,824
Net Assets Acquired		11,694
Maximum Potential Earn- Out Payable		5,200
Various \| Other Acquisitions [Member]
Business Combination, Separately Recognized Transactions [Line Items]
Cash Paid		12,798
Other Payable		433
Recorded Earn-Out Payable		3,953
Net Assets Acquired		17,184
Maximum Potential Earn- Out Payable		$ 9,262
ICA, Inc. [Member]
Business Combination, Separately Recognized Transactions [Line Items]
Net Assets Acquired			$ 20,497
ICA, Inc. [Member] \| Services [Member]
Business Combination, Separately Recognized Transactions [Line Items]
Effective Date of Acquisition			Dec. 31, 2013
Cash Paid			$ 19,770
Other Payable			0
Recorded Earn-Out Payable			727
Net Assets Acquired			20,497
Maximum Potential Earn- Out Payable			$ 5,000
Two Thousand Fourteen Acquisitions [Member]
Business Combination, Separately Recognized Transactions [Line Items]
Business Acquisition, Pro Forma Income (Loss) from Continuing Operations before Changes in Accounting and Extraordinary Items, Net of Tax, Per Share, Diluted		$ 1.49	$ 1.70
Pro Forma Weighted Average Shares Outstanding, Diluted		142,891	142,624
Two Thousand Fifteen Acquisitions [Member]
Business Combination, Separately Recognized Transactions [Line Items]
Business Acquisition, Pro Forma Income (Loss) from Continuing Operations before Changes in Accounting and Extraordinary Items, Net of Tax, Per Share, Diluted	$ 1.73	$ 1.48
Pro Forma Weighted Average Shares Outstanding, Diluted	140,112	142,891

Business Combinations - Estimated Fair Values of Aggregate Assets and Liabilities Acquired (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Fair Value Of Assets And Liabilities Statement [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents		$ 25,365,000	$ 40,360,000
Payments to Acquire Businesses, Gross	$ 136,000,000	721,851,000	408,072,000
Other Payable	10,028,000	1,904,000	552,000
Recorded Earn-Out Payable	36,899,000	33,229,000	5,091,000
Business Acquisition Purchase Price Allocation Current Assets Prepaid Expenses And Other Assets	3,640,000	20,964,000	59,598,000
Fixed assets	374,000	8,973,000	1,915,000
Goodwill	136,381,000	513,925,000	295,944,000
Purchased customer accounts	53,392,000	260,424,000	118,983,000
Non-compete agreements	328,000	1,194,000	2,886,000
Business Acquisitions Purchase Price Allocation Other Noncurrent Assets	14,000	20,045,000	108,000
Total assets acquired	194,129,000	1,165,141,000	519,794,000
Other current liabilities	(12,213,000)	(14,974,000)	(81,150,000)
Deferred Tax Liabilities, Net	2,576,000	(46,566,000)	(22,764,000)
Other liabilities	(1,565,000)	(32,366,000)	(2,165,000)
Total liabilities assumed	(11,202,000)	(408,157,000)	(106,079,000)
Net assets acquired	182,927,000	756,984,000	413,715,000
Maximum Potential Earn- Out Payable	73,074,000	49,462,000	16,768,000
Business Acquisitions Purchase Price Allocation Losses And Loss Adjustment Expense		(25,238,000)
Business Acquisition Purchase Price Allocation Unearned Premium		(289,013,000)
Business Acquisition Purchase Price Allocation Reinsurance Recoverables		25,238,000
Business Acquisition Purchase Price Allocation Prepaid Reinsurance Premiums		289,013,000
Liberty Insurance Brokers, Inc. and Affiliates (Liberty)
Fair Value Of Assets And Liabilities Statement [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents			0
Business Acquisition Purchase Price Allocation Current Assets Prepaid Expenses And Other Assets			393,000
Fixed assets			30,000
Goodwill			12,697,000
Purchased customer accounts			3,878,000
Non-compete agreements			31,000
Business Acquisitions Purchase Price Allocation Other Noncurrent Assets			0
Total assets acquired			17,029,000
Other current liabilities			(866,000)
Deferred Tax Liabilities, Net			0
Other liabilities			0
Total liabilities assumed			(866,000)
Net assets acquired			16,163,000
Beecher Carlson Holdings [Member]
Fair Value Of Assets And Liabilities Statement [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents			40,360,000
Business Acquisition Purchase Price Allocation Current Assets Prepaid Expenses And Other Assets			57,632,000
Fixed assets			1,786,000
Goodwill			265,174,000
Purchased customer accounts			101,565,000
Non-compete agreements			2,758,000
Business Acquisitions Purchase Price Allocation Other Noncurrent Assets			0
Total assets acquired			469,275,000
Other current liabilities			(80,090,000)
Deferred Tax Liabilities, Net			(22,764,000)
Other liabilities			(2,165,000)
Total liabilities assumed			(105,019,000)
Net assets acquired			364,256,000
ICA, Inc. [Member]
Fair Value Of Assets And Liabilities Statement [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents			0
Business Acquisition Purchase Price Allocation Current Assets Prepaid Expenses And Other Assets			0
Fixed assets			75,000
Goodwill			12,377,000
Purchased customer accounts			7,917,000
Non-compete agreements			21,000
Business Acquisitions Purchase Price Allocation Other Noncurrent Assets			107,000
Total assets acquired			20,497,000
Other current liabilities			0
Deferred Tax Liabilities, Net			0
Other liabilities			0
Total liabilities assumed			0
Net assets acquired			20,497,000
Spain Agency, Inc. (Spain)
Fair Value Of Assets And Liabilities Statement [Line Items]
Business Acquisition Purchase Price Allocation Current Assets Prepaid Expenses And Other Assets	324,000
Fixed assets	50,000
Goodwill	15,748,000
Purchased customer accounts	7,430,000
Non-compete agreements	21,000
Business Acquisitions Purchase Price Allocation Other Noncurrent Assets	0
Total assets acquired	23,573,000
Other current liabilities	(250,000)
Deferred Tax Liabilities, Net	0
Other liabilities	0
Total liabilities assumed	(250,000)
Net assets acquired	23,323,000
Bellingham Underwriters, Inc. [Member]
Fair Value Of Assets And Liabilities Statement [Line Items]
Business Acquisition Purchase Price Allocation Current Assets Prepaid Expenses And Other Assets	0
Fixed assets	25,000
Goodwill	9,608,000
Purchased customer accounts	3,223,000
Non-compete agreements	21,000
Business Acquisitions Purchase Price Allocation Other Noncurrent Assets	0
Total assets acquired	12,877,000
Other current liabilities	(48,000)
Deferred Tax Liabilities, Net	0
Other liabilities	0
Total liabilities assumed	(48,000)
Net assets acquired	12,829,000
Fitness Insurance, LLC [Member]
Fair Value Of Assets And Liabilities Statement [Line Items]
Business Acquisition Purchase Price Allocation Current Assets Prepaid Expenses And Other Assets	9,000
Fixed assets	17,000
Goodwill	8,105,000
Purchased customer accounts	3,715,000
Non-compete agreements	0
Business Acquisitions Purchase Price Allocation Other Noncurrent Assets	0
Total assets acquired	11,846,000
Other current liabilities	(12,000)
Deferred Tax Liabilities, Net	0
Other liabilities	0
Total liabilities assumed	(12,000)
Net assets acquired	11,834,000
Other
Fair Value Of Assets And Liabilities Statement [Line Items]
Business Acquisition Purchase Price Allocation Current Assets Prepaid Expenses And Other Assets	652,000
Fixed assets	41,000
Goodwill	39,859,000
Purchased customer accounts	23,000,000
Non-compete agreements	21,000
Business Acquisitions Purchase Price Allocation Other Noncurrent Assets	14,000
Total assets acquired	63,587,000
Other current liabilities	0
Deferred Tax Liabilities, Net	0
Other liabilities	0
Total liabilities assumed	0
Net assets acquired	63,587,000
Bentrust Financial, Inc. [Member]
Fair Value Of Assets And Liabilities Statement [Line Items]
Business Acquisition Purchase Price Allocation Current Assets Prepaid Expenses And Other Assets	0
Fixed assets	36,000
Goodwill	8,166,000
Purchased customer accounts	2,789,000
Non-compete agreements	43,000
Business Acquisitions Purchase Price Allocation Other Noncurrent Assets	0
Total assets acquired	11,034,000
Other current liabilities	(182,000)
Deferred Tax Liabilities, Net	0
Other liabilities	0
Total liabilities assumed	(182,000)
Net assets acquired	10,852,000
MBA Insurance Agency of Arizona, Inc. [Member]
Fair Value Of Assets And Liabilities Statement [Line Items]
Business Acquisition Purchase Price Allocation Current Assets Prepaid Expenses And Other Assets	0
Fixed assets	33,000
Goodwill	13,471,000
Purchased customer accounts	7,338,000
Non-compete agreements	11,000
Business Acquisitions Purchase Price Allocation Other Noncurrent Assets	0
Total assets acquired	20,853,000
Other current liabilities	(6,280,000)
Deferred Tax Liabilities, Net	0
Other liabilities	0
Total liabilities assumed	(6,280,000)
Net assets acquired	14,573,000
Smith Insurance, Inc. [Member]
Fair Value Of Assets And Liabilities Statement [Line Items]
Business Acquisition Purchase Price Allocation Current Assets Prepaid Expenses And Other Assets	0
Fixed assets	73,000
Goodwill	10,374,000
Purchased customer accounts	3,526,000
Non-compete agreements	31,000
Business Acquisitions Purchase Price Allocation Other Noncurrent Assets	0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Prepaid Expense and Other Assets	14,004,000
Other current liabilities	(504,000)
Deferred Tax Liabilities, Net	0
Other liabilities	(157,000)
Total liabilities assumed	(661,000)
Net assets acquired	13,343,000
Other Acquisitions [Member]
Fair Value Of Assets And Liabilities Statement [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents		0	0
Business Acquisition Purchase Price Allocation Current Assets Prepaid Expenses And Other Assets	169,000	742,000	1,573,000
Fixed assets	59,000	1,724,000	24,000
Goodwill	21,040,000	10,417,000	5,696,000
Purchased customer accounts	(2,135,000)	4,384,000	5,623,000
Non-compete agreements	156,000	166,000	76,000
Business Acquisitions Purchase Price Allocation Other Noncurrent Assets	0	0	1,000
Total assets acquired	19,289,000	17,433,000	12,993,000
Other current liabilities	(4,895,000)	(249,000)	(194,000)
Deferred Tax Liabilities, Net	2,576,000	0	0
Other liabilities	635,000	0	0
Total liabilities assumed	(1,684,000)	(249,000)	(194,000)
Net assets acquired	17,605,000	17,184,000	12,799,000
Business Acquisitions Purchase Price Allocation Losses And Loss Adjustment Expense		0
Business Acquisition Purchase Price Allocation Unearned Premium		0
Business Acquisition Purchase Price Allocation Reinsurance Recoverables		0
Business Acquisition Purchase Price Allocation Prepaid Reinsurance Premiums		0
Liberty Insurance Brokers, Inc. and Affiliates [Member]
Fair Value Of Assets And Liabilities Statement [Line Items]
Business Acquisition Purchase Price Allocation Current Assets Prepaid Expenses And Other Assets	2,486,000
Fixed assets	40,000
Goodwill	10,010,000
Purchased customer accounts	4,506,000
Non-compete agreements	24,000
Business Acquisitions Purchase Price Allocation Other Noncurrent Assets	0
Total assets acquired	17,066,000
Other current liabilities	(42,000)
Deferred Tax Liabilities, Net	0
Other liabilities	(2,043,000)
Total liabilities assumed	(2,085,000)
Net assets acquired	14,981,000
Wright Insurance Group Llc [Member]
Fair Value Of Assets And Liabilities Statement [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents		25,365,000
Business Acquisition Purchase Price Allocation Current Assets Prepaid Expenses And Other Assets		16,474,000
Fixed assets		7,172,000
Goodwill		420,209,000
Purchased customer accounts		213,677,000
Non-compete agreements		966,000
Business Acquisitions Purchase Price Allocation Other Noncurrent Assets		20,045,000
Total assets acquired		1,018,159,000
Other current liabilities		(14,322,000)
Deferred Tax Liabilities, Net		(46,566,000)
Other liabilities		(32,366,000)
Total liabilities assumed		(407,505,000)
Net assets acquired		610,654,000
Business Acquisitions Purchase Price Allocation Losses And Loss Adjustment Expense		(25,238,000)
Business Acquisition Purchase Price Allocation Unearned Premium		(289,013,000)
Business Acquisition Purchase Price Allocation Reinsurance Recoverables		25,238,000
Business Acquisition Purchase Price Allocation Prepaid Reinsurance Premiums		289,013,000
Pacific Resources Benefits Advisors [Member]
Fair Value Of Assets And Liabilities Statement [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents		0
Business Acquisition Purchase Price Allocation Current Assets Prepaid Expenses And Other Assets		3,647,000
Fixed assets		53,000
Goodwill		76,023,000
Purchased customer accounts		38,111,000
Non-compete agreements		21,000
Business Acquisitions Purchase Price Allocation Other Noncurrent Assets		0
Total assets acquired		117,855,000
Other current liabilities		(403,000)
Deferred Tax Liabilities, Net		0
Other liabilities		0
Total liabilities assumed		(403,000)
Net assets acquired		117,452,000
Business Acquisitions Purchase Price Allocation Losses And Loss Adjustment Expense		0
Business Acquisition Purchase Price Allocation Unearned Premium		0
Business Acquisition Purchase Price Allocation Reinsurance Recoverables		0
Business Acquisition Purchase Price Allocation Prepaid Reinsurance Premiums		0
Axia Strategies, Inc. [Member]
Fair Value Of Assets And Liabilities Statement [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents		0
Business Acquisition Purchase Price Allocation Current Assets Prepaid Expenses And Other Assets		101,000
Fixed assets		24,000
Goodwill		7,276,000
Purchased customer accounts		4,252,000
Non-compete agreements		41,000
Business Acquisitions Purchase Price Allocation Other Noncurrent Assets		0
Total assets acquired		11,694,000
Other current liabilities		0
Deferred Tax Liabilities, Net		0
Other liabilities		0
Total liabilities assumed		0
Net assets acquired		11,694,000
Business Acquisitions Purchase Price Allocation Losses And Loss Adjustment Expense		0
Business Acquisition Purchase Price Allocation Unearned Premium		0
Business Acquisition Purchase Price Allocation Reinsurance Recoverables		0
Business Acquisition Purchase Price Allocation Prepaid Reinsurance Premiums		0
Retail
Fair Value Of Assets And Liabilities Statement [Line Items]
Goodwill	$ 113,800,000	$ 86,400,000	$ 257,200,000
Retail \| Liberty Insurance Brokers, Inc. and Affiliates (Liberty)
Fair Value Of Assets And Liabilities Statement [Line Items]
Effective Date of Acquisition			Jun. 01, 2013
Payments to Acquire Businesses, Gross			$ 13,792,000
Other Payable			50,000
Recorded Earn-Out Payable			2,321,000
Net assets acquired			16,163,000
Maximum Potential Earn- Out Payable			4,300,000
Retail \| Spain Agency, Inc. (Spain)
Fair Value Of Assets And Liabilities Statement [Line Items]
Effective Date of Acquisition	Mar. 01, 2015
Payments to Acquire Businesses, Gross	$ 20,706,000
Other Payable	0
Recorded Earn-Out Payable	2,617,000
Net assets acquired	23,323,000
Maximum Potential Earn- Out Payable	$ 9,162,000
Retail \| Fitness Insurance, LLC [Member]
Fair Value Of Assets And Liabilities Statement [Line Items]
Effective Date of Acquisition	Jun. 01, 2015
Payments to Acquire Businesses, Gross	$ 9,455,000
Other Payable	0
Recorded Earn-Out Payable	2,379,000
Net assets acquired	11,834,000
Maximum Potential Earn- Out Payable	$ 3,500,000
Retail \| Other
Fair Value Of Assets And Liabilities Statement [Line Items]
Effective Date of Acquisition	Jun. 01, 2015
Payments to Acquire Businesses, Gross	$ 49,600,000
Other Payable	400,000
Recorded Earn-Out Payable	13,587,000
Net assets acquired	63,587,000
Maximum Potential Earn- Out Payable	$ 26,000,000
Retail \| Bentrust Financial, Inc. [Member]
Fair Value Of Assets And Liabilities Statement [Line Items]
Effective Date of Acquisition	Dec. 01, 2015
Payments to Acquire Businesses, Gross	$ 10,142,000
Other Payable	391,000
Recorded Earn-Out Payable	319,000
Net assets acquired	10,852,000
Maximum Potential Earn- Out Payable	$ 2,200,000
Retail \| MBA Insurance Agency of Arizona, Inc. [Member]
Fair Value Of Assets And Liabilities Statement [Line Items]
Effective Date of Acquisition	Dec. 01, 2015
Payments to Acquire Businesses, Gross	$ 68,000
Other Payable	8,442,000
Recorded Earn-Out Payable	6,063,000
Net assets acquired	14,573,000
Maximum Potential Earn- Out Payable	$ 9,500,000
Retail \| Smith Insurance, Inc. [Member]
Fair Value Of Assets And Liabilities Statement [Line Items]
Effective Date of Acquisition	Dec. 01, 2015
Payments to Acquire Businesses, Gross	$ 12,096,000
Other Payable	200,000
Recorded Earn-Out Payable	1,047,000
Net assets acquired	13,343,000
Maximum Potential Earn- Out Payable	$ 6,350,000
Retail \| Liberty Insurance Brokers, Inc. and Affiliates [Member]
Fair Value Of Assets And Liabilities Statement [Line Items]
Effective Date of Acquisition	Feb. 01, 2015
Payments to Acquire Businesses, Gross	$ 12,000,000
Other Payable	0
Recorded Earn-Out Payable	2,981,000
Net assets acquired	14,981,000
Maximum Potential Earn- Out Payable	3,750,000
Retail \| Pacific Resources Benefits Advisors [Member]
Fair Value Of Assets And Liabilities Statement [Line Items]
Effective Date of Acquisition		May 01, 2014
Payments to Acquire Businesses, Gross		$ 90,000,000
Other Payable		0
Recorded Earn-Out Payable		27,452,000
Net assets acquired		117,452,000
Maximum Potential Earn- Out Payable		35,000,000
National Programs
Fair Value Of Assets And Liabilities Statement [Line Items]
Goodwill	$ 18,000,000	$ 420,000,000	27,100,000
National Programs \| Bellingham Underwriters, Inc. [Member]
Fair Value Of Assets And Liabilities Statement [Line Items]
Effective Date of Acquisition	May 01, 2015
National Programs \| Wright Insurance Group Llc [Member]
Fair Value Of Assets And Liabilities Statement [Line Items]
Effective Date of Acquisition		May 01, 2014
Payments to Acquire Businesses, Gross		$ 609,183,000
Other Payable		1,471,000
Recorded Earn-Out Payable		0
Net assets acquired		610,654,000
Maximum Potential Earn- Out Payable		0
Wholesale Brokerage
Fair Value Of Assets And Liabilities Statement [Line Items]
Goodwill	$ 4,600,000	$ 7,700,000	$ (800,000)
Wholesale Brokerage \| Axia Strategies, Inc. [Member]
Fair Value Of Assets And Liabilities Statement [Line Items]
Effective Date of Acquisition		May 01, 2014
Payments to Acquire Businesses, Gross		$ 9,870,000
Other Payable		0
Recorded Earn-Out Payable		1,824,000
Net assets acquired		11,694,000
Maximum Potential Earn- Out Payable		$ 5,200,000

Business Combinations - Results of Operations (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual	$ 28,200	$ 112,200	$ 63,800
Business Combination Pro Forma Information Income Loss Before Income Taxes Of Acquiree Since Acquisition Date Actual	1,500	(1,300)	900
Two Thousand Fourteen Acquisitions [Member]
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Total revenues		1,630,162	1,520,858
Income before income taxes		358,229	409,522
Net income		$ 218,150	$ 248,628
Net income per share:
Basic (in dollars per share)		$ 1.51	$ 1.72
Business Acquisition, Pro Forma Income (Loss) from Continuing Operations before Changes in Accounting and Extraordinary Items, Net of Tax, Per Share, Diluted		$ 1.49	$ 1.70
Weighted Average Basic Shares Outstanding, Pro Forma		140,944	141,033
Weighted average number of shares outstanding:
Pro Forma Weighted Average Shares Outstanding, Diluted		142,891	142,624
Two Thousand Thirteen Acquisitions [Member]
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Total revenues			$ 1,439,918	$ 1,329,262
Income before income taxes			373,175	329,291
Net income			$ 226,562	$ 198,826
Net income per share:
Basic (in dollars per share)			$ 1.57	$ 1.39
Business Acquisition, Pro Forma Income (Loss) from Continuing Operations before Changes in Accounting and Extraordinary Items, Net of Tax, Per Share, Diluted			$ 1.55	$ 1.36
Weighted Average Basic Shares Outstanding, Pro Forma			141,033	139,634
Weighted average number of shares outstanding:
Pro Forma Weighted Average Shares Outstanding, Diluted			142,624	142,010
Two Thousand Fifteen Acquisitions [Member]
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Total revenues	1,688,297	$ 1,630,992
Income before income taxes	411,497	356,426
Net income	$ 248,720	$ 217,053
Net income per share:
Basic (in dollars per share)	$ 1.76	$ 1.50
Business Acquisition, Pro Forma Income (Loss) from Continuing Operations before Changes in Accounting and Extraordinary Items, Net of Tax, Per Share, Diluted	$ 1.73	$ 1.48
Weighted Average Basic Shares Outstanding, Pro Forma	137,810	140,944
Weighted average number of shares outstanding:
Pro Forma Weighted Average Shares Outstanding, Diluted	140,112	142,891

Business Combinations - Additions, Payments, and Net Changes, as well as Interest Expense Accretion on Estimated Acquisition Earn-Out Payables (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Business Combinations [Abstract]
Beginning balance	$ 75,283	$ 43,058	$ 52,987
Additions to estimated acquisition earn-out payables	36,899	34,356	5,816
Payments for estimated acquisition earn-out payables	36,798	12,069	18,278
Subtotal	75,384	65,345	40,525
Net change in earnings from estimated acquisition earn-out payables:
Change in fair value on estimated acquisition earn-out payables	(2,990)	(7,375)	(570)
Interest expense accretion	13	2,563	1,963
Net change in earnings from estimated acquisition earn-out payables	3,003	9,938	2,533
Ending balance	$ 78,387	$ 75,283	$ 43,058

Business Combinations Business Acquisitions - Pro-forma Table (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Two Thousand Fifteen Acquisitions [Member]
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Weighted Average Basic Shares Outstanding, Pro Forma	137,810	140,944
Business Acquisition, Pro Forma Revenue	$ 1,688,297	$ 1,630,992
Business Acquisition, Pro Forma Income (Loss) from Continuing Operations before Changes in Accounting and Extraordinary Items, Net of Tax	411,497	356,426
Business Acquisition, Pro Forma Net Income (Loss)	$ 248,720	$ 217,053
Business Acquisition, Pro Forma Income (Loss) from Continuing Operations before Changes in Accounting and Extraordinary Items, Net of Tax, Per Share, Basic	$ 1.76	$ 1.50
Business Acquisition, Pro Forma Income (Loss) from Continuing Operations before Changes in Accounting and Extraordinary Items, Net of Tax, Per Share, Diluted	$ 1.73	$ 1.48
Pro Forma Weighted Average Shares Outstanding, Diluted	140,112	142,891
Two Thousand Fourteen Acquisitions [Member]
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Weighted Average Basic Shares Outstanding, Pro Forma		140,944	141,033
Business Acquisition, Pro Forma Revenue		$ 1,630,162	$ 1,520,858
Business Acquisition, Pro Forma Income (Loss) from Continuing Operations before Changes in Accounting and Extraordinary Items, Net of Tax		358,229	409,522
Business Acquisition, Pro Forma Net Income (Loss)		$ 218,150	$ 248,628
Business Acquisition, Pro Forma Income (Loss) from Continuing Operations before Changes in Accounting and Extraordinary Items, Net of Tax, Per Share, Basic		$ 1.51	$ 1.72
Business Acquisition, Pro Forma Income (Loss) from Continuing Operations before Changes in Accounting and Extraordinary Items, Net of Tax, Per Share, Diluted		$ 1.49	$ 1.70
Pro Forma Weighted Average Shares Outstanding, Diluted		142,891	142,624
Two Thousand Thirteen Acquisitions [Member]
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Weighted Average Basic Shares Outstanding, Pro Forma			141,033	139,634
Business Acquisition, Pro Forma Revenue			$ 1,439,918	$ 1,329,262
Business Acquisition, Pro Forma Income (Loss) from Continuing Operations before Changes in Accounting and Extraordinary Items, Net of Tax			373,175	329,291
Business Acquisition, Pro Forma Net Income (Loss)			$ 226,562	$ 198,826
Business Acquisition, Pro Forma Income (Loss) from Continuing Operations before Changes in Accounting and Extraordinary Items, Net of Tax, Per Share, Basic			$ 1.57	$ 1.39
Business Acquisition, Pro Forma Income (Loss) from Continuing Operations before Changes in Accounting and Extraordinary Items, Net of Tax, Per Share, Diluted			$ 1.55	$ 1.36
Pro Forma Weighted Average Shares Outstanding, Diluted			142,624	142,010

Goodwill - Changes in Carrying Value of Goodwill by Operating Segment (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Goodwill [Roll Forward]
Beginning balance	$ 2,460,611	$ 2,006,173
Goodwill of acquired businesses	136,381	513,951
Goodwill disposed of relating to sales of businesses	(10,309)	(59,513)
Ending balance	2,586,683	2,460,611
Retail
Goodwill [Roll Forward]
Beginning balance	1,231,869	1,141,485
Goodwill of acquired businesses	113,767	94,080
Goodwill disposed of relating to sales of businesses	0	(3,696)
Ending balance	1,345,636	1,231,869
National Programs
Goodwill [Roll Forward]
Beginning balance	886,095	475,596
Goodwill of acquired businesses	18,009	420,063
Goodwill disposed of relating to sales of businesses	(2,238)	(9,564)
Ending balance	901,866	886,095
Wholesale Brokerage
Goodwill [Roll Forward]
Beginning balance	222,356	268,562
Goodwill of acquired businesses	4,605	47
Goodwill disposed of relating to sales of businesses	0	(46,253)
Ending balance	226,961	222,356
Services
Goodwill [Roll Forward]
Beginning balance	120,291	120,530
Goodwill of acquired businesses	0	(239)
Goodwill disposed of relating to sales of businesses	(8,071)	0
Ending balance	$ 112,220	$ 120,291

Amortizable Intangible Assets - Amortizable Intangible Assets (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	$ 1,428,426	$ 1,384,689
Accumulated Amortization	(683,746)	(600,047)
Net Carrying Value	744,680	784,642
Purchased customer accounts
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	1,398,986	1,355,550
Accumulated Amortization	(656,799)	(574,285)
Net Carrying Value	$ 742,187	$ 781,265
Weighted Average Life (Years)	15 years	14 years 10 months 24 days
Non-compete agreements
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	$ 29,440	$ 29,139
Accumulated Amortization	(26,947)	(25,762)
Net Carrying Value	$ 2,493	$ 3,377
Weighted Average Life (Years)	6 years 9 months 18 days	6 years 9 months 18 days

Amortizable Intangible Assets - Additional Information (Detail) $ in Millions	Dec. 31, 2015 USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization expense estimated, year one (2015)	$ 84.5
Amortization expense estimated, year two (2016)	81.6
Amortization expense estimated, year three (2017)	76.3
Amortization expense estimated, year four (2018)	71.8
Amortization expense estimated, year five (2019)	$ 64.5

Investments - Schedule of Investments in Fixed Maturity Securities (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Schedule of Available-for-sale Securities [Line Items]
Cost	$ 18,094	$ 19,821
Gross Unrealized Gains	40	53
Gross Unrealized Losses	(42)	(12)
Fair Value	18,092	19,862
U.S. Treasury securities, obligations of U.S. Government agencies and Municipals
Schedule of Available-for-sale Securities [Line Items]
Cost	11,876	10,774
Gross Unrealized Gains	6	7
Gross Unrealized Losses	(26)	(1)
Fair Value	11,856	10,780
Foreign government
Schedule of Available-for-sale Securities [Line Items]
Cost	50	50
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Fair Value	50	50
Corporate debt
Schedule of Available-for-sale Securities [Line Items]
Cost	4,505	5,854
Gross Unrealized Gains	7	9
Gross Unrealized Losses	(16)	(11)
Fair Value	4,496	5,852
Short duration fixed income fund
Schedule of Available-for-sale Securities [Line Items]
Cost	1,663	3,143
Gross Unrealized Gains	27	37
Gross Unrealized Losses	0
Fair Value	$ 1,690	$ 3,180

Investments - Summary of Unrealized Loss Position (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Schedule of Available-for-sale Securities [Line Items]
Fair Value, Less than 12 Months	$ 11,779	$ 8,483
Unrealized Losses, Less than 12 Months	40	12
Fair Value, 12 Months or More	284	0
Unrealized Losses, 12 Months or More	2	0
Fair Value	12,063	8,483
Unrealized Losses	42	12
U.S. Treasury securities, obligations of U.S. Government agencies and Municipals
Schedule of Available-for-sale Securities [Line Items]
Fair Value, Less than 12 Months	8,998	3,994
Unrealized Losses, Less than 12 Months	26	1
Fair Value, 12 Months or More	0	0
Unrealized Losses, 12 Months or More	0	0
Fair Value	8,998	3,994
Unrealized Losses	26	1
Foreign government
Schedule of Available-for-sale Securities [Line Items]
Fair Value, Less than 12 Months	50	50
Unrealized Losses, Less than 12 Months	0	0
Fair Value, 12 Months or More		0
Unrealized Losses, 12 Months or More		0
Fair Value	50	50
Unrealized Losses	0	0
Corporate debt
Schedule of Available-for-sale Securities [Line Items]
Fair Value, Less than 12 Months	2,731	4,439
Unrealized Losses, Less than 12 Months	14	11
Fair Value, 12 Months or More	284	0
Unrealized Losses, 12 Months or More	2	0
Fair Value	3,015	4,439
Unrealized Losses	$ 16	$ 11

Investments - Additional Information (Detail) $ in Millions	12 Months Ended
Investments - Additional Information (Detail) $ in Millions	Dec. 31, 2015 USD ($) Securities	Dec. 31, 2014 Securities
Investments, Debt and Equity Securities [Abstract]
Number of securities in unrealized loss position \| Securities	35	38
Proceeds from sale of investment in fixed maturity securities	$ 5.6
Investment security maturity date, End	Dec. 31, 2015
Gross realized gains and losses of securities	insignificant
Investments on deposit with the state insurance department	$ 4.0

Investments - Amortized Cost and Fair Value of Fixed Maturity Securities by Contractual Maturity (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Amortized Cost
Due in one year or less	$ 5,726	$ 5,628
Due after one year through five years	12,038	13,863
Due after five years through ten years	330	330
Amortized Cost, Total	18,094	19,821
Fair Value
Due in one year or less	5,722	5,628
Due after one year through five years	12,041	13,897
Due after five years through ten years	329	337
Fair Value, Total	$ 18,092	$ 19,862

Fixed Assets (Details) - USD ($) $ in Thousands	12 Months Ended
Fixed Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Property, Plant and Equipment [Line Items]
Depreciation	$ 20,890	$ 20,895	$ 17,485
Property, Plant and Equipment, Gross	205,184	195,308
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	(123,431)	(110,640)
Property, Plant and Equipment, Net	81,753	84,668
Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	169,682	161,539
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	32,132	30,030
Land, Buildings and Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 3,370	$ 3,739

Long-Term Debt - Long-Term Debt Instrument (Detail) - USD ($)	Dec. 31, 2015	Jan. 15, 2015	Dec. 31, 2014	Apr. 16, 2014
Debt Instrument [Line Items]
Total current portion of long-term debt	$ 73,125,000		$ 45,625,000
Total notes	598,628,000		623,471,000
Long-term credit agreements	481,250,000		529,375,000	$ 25,000,000.0
Total long-term debt	1,079,878,000		1,152,846,000
Current portion of long-term debt	73,125,000		45,625,000
Total debt	1,153,003,000		1,198,471,000
5.370% senior notes, Series D, quarterly interest payments, balloon due 2015
Debt Instrument [Line Items]
Current portion of senior notes	0	$ 25,000,000	25,000,000
5.660% senior notes, Series C, semi-annual interest payments, balloon due 2016
Debt Instrument [Line Items]
Current portion of senior notes	25,000,000		0
Total notes	0		25,000,000
4.500% senior notes, Series E, quarterly interest payments, balloon due 2018
Debt Instrument [Line Items]
Total notes	100,000,000		100,000,000
4.200% senior notes, semi-annual interest payments, balloon due 2024
Debt Instrument [Line Items]
Total notes	498,628,000		498,471,000
5-year term-loan facility, periodic interest and principal payments, currently LIBOR plus up to 1.75%, expires May 20, 2019
Debt Instrument [Line Items]
Current portion of loan facility	48,125,000		20,625,000
Long-term credit agreements	481,250,000		529,375,000
5-year revolving-loan facility, periodic interest payments, currently LIBOR plus up to 1.50%, plus commitment fees up to 0.25%, expires May 20, 2019
Debt Instrument [Line Items]
Long-term credit agreements	0		0
Revolving credit loan, quarterly interest payments, LIBOR plus up to 1.40% and availability fee up to 0.25%, expires December 31, 2016
Debt Instrument [Line Items]
Long-term credit agreements	$ 0		$ 0

Long-Term Debt - Long-Term Debt Instrument (Additional Information) (Detail)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
5.370% senior notes, Series D, quarterly interest payments, balloon due 2015
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage	5.37%	5.37%
Debt instrument maturity year	2015	2015
5.660% senior notes, Series C, semi-annual interest payments, balloon due 2016
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage	5.66%	5.66%
Debt instrument maturity year	2016	2016
4.500% senior notes, Series E, quarterly interest payments, balloon due 2018
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage	4.50%	4.50%
Debt instrument maturity year	2018	2018
4.200% senior notes, semi-annual interest payments, balloon due 2024
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage	4.20%	4.20%
Debt instrument maturity year	2024	2024
5-year term-loan facility, periodic interest and principal payments, currently LIBOR plus up to 1.75%, expires May 20, 2019
Debt Instrument [Line Items]
Line of credit facility, expiration period	5 years	5 years
Line of credit facility, expiration date	May 20, 2019	May 20, 2019
5-year term-loan facility, periodic interest and principal payments, currently LIBOR plus up to 1.75%, expires May 20, 2019 \| LIBOR
Debt Instrument [Line Items]
Debt instrument, variable interest rate	1.25%	1.375%
5-year revolving-loan facility, periodic interest payments, currently LIBOR plus up to 1.50%, plus commitment fees up to 0.25%, expires May 20, 2019
Debt Instrument [Line Items]
Line of credit facility, expiration period	5 years	5 years
Line of credit facility, commitment fee percentage	0.175%	0.20%
Line of credit facility, expiration date	May 20, 2019	May 20, 2019
5-year revolving-loan facility, periodic interest payments, currently LIBOR plus up to 1.50%, plus commitment fees up to 0.25%, expires May 20, 2019 \| LIBOR
Debt Instrument [Line Items]
Debt instrument, variable interest rate	1.075%	1.175%
Revolving credit loan, quarterly interest payments, LIBOR plus up to 1.40% and availability fee up to 0.25%, expires December 31, 2016
Debt Instrument [Line Items]
Line of credit facility, expiration date	Dec. 31, 2016	Dec. 31, 2016
Maximum \| Revolving credit loan, quarterly interest payments, LIBOR plus up to 1.40% and availability fee up to 0.25%, expires December 31, 2016
Debt Instrument [Line Items]
Line of credit facility, commitment fee percentage	0.25%	0.25%
Maximum \| Revolving credit loan, quarterly interest payments, LIBOR plus up to 1.40% and availability fee up to 0.25%, expires December 31, 2016 \| LIBOR
Debt Instrument [Line Items]
Debt instrument, variable interest rate	1.40%	1.40%

Long-Term Debt - Narrative (Detail)			12 Months Ended
Long-Term Debt - Narrative (Detail)	Sep. 18, 2014 USD ($)	May. 20, 2014 USD ($) extension	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)	Jan. 15, 2015 USD ($)	Apr. 17, 2014 USD ($)	Apr. 16, 2014 USD ($)	Apr. 15, 2014 USD ($)	Jul. 01, 2013 USD ($)	Sep. 15, 2011 USD ($)	Feb. 01, 2008 USD ($)	Dec. 22, 2006 USD ($)
Debt Instrument [Line Items]
Credit facility, outstanding amount			$ 481,250,000	$ 529,375,000				$ 25,000,000.0
Revolving and term loan			529,400,000
Potential increased in line of credit facility							$ 500,000,000.0
Unsecured revolving credit facility							800,000,000.0
Unsecured term loans							550,000,000.0
Proceeds from lines of credit			0	475,000,000	$ 31,863,000
Outstanding debt balance			$ 1,153,003,000	$ 1,198,471,000
5.370% senior notes, Series D, quarterly interest payments, balloon due 2015
Debt Instrument [Line Items]
Debt instrument interest rate stated percentage			5.37%	5.37%
Current portion of senior notes			$ 0	$ 25,000,000		$ 25,000,000
Debt instrument maturity year			2015	2015
Credit Agreement
Debt Instrument [Line Items]
Credit facility, outstanding amount			$ 529,400,000	$ 550,000,000
Number of extension periods \| extension		2
Extension period		1 year
Unsecured revolving credit facility							$ 1,350,000,000.0
Unsecured Senior Notes
Debt Instrument [Line Items]
Debt instrument interest rate stated percentage	4.20%
Debt instrument, face amount	$ 500,000,000.0
Debt instrument maturity year	2024
Outstanding debt balance			500,000,000	500,000,000
Wells Fargo [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Remaining Borrowing Capacity			$ 0	0
Debt instrument, maturity date			Dec. 31, 2016
Potential increased in line of credit facility			$ 75,000,000.0
Unsecured revolving credit facility			800,000,000	800,000,000
Wells Fargo [Member] \| Beecher Acquisition
Debt Instrument [Line Items]
Credit facility, outstanding amount									$ 50,000,000.0	$ 50,000,000.0
Wells Fargo [Member]
Debt Instrument [Line Items]
Line of Credit Facility Increase in Borrowing Capacity			$ 50,000,000
Line of Credit \| Wells Fargo [Member]
Debt Instrument [Line Items]
Letter of credit usage fee, minimum			1.00%
Letter of credit usage fee, maximum			1.40%
LIBOR below base rate			1.00%
Availability fees, minimum			0.175%
Availability fees, maximum			0.25%
Term Loan
Debt Instrument [Line Items]
Credit facility, outstanding amount		$ 550,000,000.0
Revolving Credit Facility
Debt Instrument [Line Items]
Credit facility, outstanding amount	$ 475,000,000	$ 375,000,000
Proceeds from lines of credit			$ 0	0
Uncommitted Facility \| New Master Agreement
Debt Instrument [Line Items]
Credit facility, outstanding amount				0
Master Agreement
Debt Instrument [Line Items]
Unsecured senior notes outstanding			125,000,000
Master Agreement \| Series C
Debt Instrument [Line Items]
Unsecured senior notes outstanding												$ 25,000,000.0	$ 25,000,000.0
Debt instrument interest rate stated percentage													5.66%
Master Agreement \| Series D
Debt Instrument [Line Items]
Debt instrument interest rate stated percentage												5.37%
Master Agreement \| Series E
Debt Instrument [Line Items]
Unsecured senior notes outstanding											$ 100,000,000.0
Debt instrument interest rate stated percentage											4.50%
New Master Agreement
Debt Instrument [Line Items]
Unsecured senior notes outstanding			$ 1,153,003,000	$ 1,198,471,000
LIBOR
Debt Instrument [Line Items]
30-day Adjusted LIBOR Rate			0.44%
Minimum \| Revolving Credit Facility
Debt Instrument [Line Items]
Facility fee			0.15%
Minimum \| LIBOR \| Term Loan
Debt Instrument [Line Items]
Debt instrument, variable interest rate			1.00%
Minimum \| LIBOR \| Line of Credit \| Wells Fargo [Member]
Debt Instrument [Line Items]
Debt instrument, variable interest rate			1.00%
Minimum \| LIBOR \| Revolving Credit Facility
Debt Instrument [Line Items]
Debt instrument, variable interest rate			0.85%
Maximum \| Revolving Credit Facility
Debt Instrument [Line Items]
Facility fee			0.25%
Maximum \| LIBOR \| Term Loan
Debt Instrument [Line Items]
Debt instrument, variable interest rate			1.75%
Maximum \| LIBOR \| Line of Credit \| Wells Fargo [Member]
Debt Instrument [Line Items]
Debt instrument, variable interest rate			1.40%
Maximum \| LIBOR \| Revolving Credit Facility
Debt Instrument [Line Items]
Debt instrument, variable interest rate			1.50%

Long-Term Debt Details (Details) - USD ($) $ in Thousands	12 Months Ended
Long-Term Debt Details (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Debt Disclosure [Abstract]
Interest	$ 37,542	$ 25,115	$ 16,501
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months	73,100
Long-term Debt, Maturities, Repayments of Principal in Year Two	55,000
Long-term Debt, Maturities, Repayments of Principal in Year Three	155,000
Long-term Debt, Maturities, Repayments of Principal in Year Four	371,300
Long-term Debt, Maturities, Repayments of Principal in Year Five	$ 500,000

Income Taxes (Details) - USD ($)	12 Months Ended
Income Taxes (Details) - USD ($)	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Abstract]
Liability for Uncertain Tax Positions, Current	$ 102,171	$ 65,772
Income Taxes Paid	132,874,000	118,290,000	$ 110,190,000
Unrecognized Tax Benefits	583,977	113,032	$ 391,000	$ 294,000
Deferred Tax Liabilities, Property, Plant and Equipment	8,585,000	10,368,000
deferred profit sharing contingent commissions	$ 9,767,000	$ 10,335,000
Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount	35.00%	35.00%	35.00%
Current Federal Tax Expense (Benefit)	$ 118,490,000	$ 109,893,000	$ 94,007,000
Current State and Local Tax Expense (Benefit)	17,625,000	15,482,000	13,438,000
Current Foreign Tax Expense (Benefit)	430,000	109,000	805,000
Current Income Tax Expense (Benefit)	136,545,000	125,484,000	108,250,000
Deferred Federal Income Tax Expense (Benefit)	18,416,000	5,987,000	28,469,000
Deferred State and Local Income Tax Expense (Benefit)	4,280,000	1,440,000	3,723,000
Deferred Foreign Income Tax Expense (Benefit)	0	(58,000)	55,000
Summary of Income Tax Contingencies [Table Text Block]	22,696,000	7,369,000	32,247,000
Income Tax Expense (Benefit)	$ 159,241,000	$ 132,853,000	$ 140,497,000
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent	3.90%	3.30%	3.50%
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-based Compensation Cost, Percent	0.30%	0.30%	0.30%
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Meals and Entertainment, Percent	0.30%	0.40%	0.30%
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Other, Percent	0.10%	0.10%	0.20%
Effective Income Tax Rate Reconciliation, Percent	39.60%	39.10%	39.30%
Deferred Tax Assets Operating Loss Carryforwards Current	$ 10,000	$ 951,000
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals	14,858,000	14,145,000
Deferred Tax Assets, Net, Current	24,635,000	25,431,000
Net Unrealized Holding Gain on Available for Sale Securities	(9,000)	56,000
Deferred Tax Liabilities, Goodwill and Intangible Assets	393,251,000	364,938,000
Non Current Deferred Tax Liability	401,827,000	375,362,000
Deferred income taxes, net	360,949,000	341,497,000
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Employee Compensation	38,966,000	31,580,000
Deferred Tax Assets, Operating Loss Carryforwards	2,518,000	2,796,000
Deferred Tax Assets, Valuation Allowance	(606,000)	(511,000)
Deferred Tax Assets, Net, Noncurrent	40,878,000	33,865,000
Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions	773,000	0	$ 232,000
Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions	0	(21,000)	0
Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities	(302,000)	$ (257,000)	$ (135,000)
Operating Loss Carryforwards	184,218
Operating Loss Carryforwards State	$ 61,217,003
Operating Loss Carryforwards, Expiration Date	2034

Employee Savings Plan (Details) - USD ($)	12 Months Ended
Employee Savings Plan (Details) - USD ($)	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Employee Savings Plan [Abstract]
Compensation and Employee Benefit Plans [Text Block]	Employee Savings Plan The Company has an Employee Savings Plan (401(k)) in which substantially all employees with more than 30 days of service are eligible to participate. Under this plan, Brown & Brown makes matching contributions of up to 4.0% of each participant’s annual compensation. Prior to 2014, the Company’s matching contribution was up to 2.5% of each participant’s annual compensation with a discretionary profit-sharing contribution each year, which equaled 1.5% of each eligible employee’s compensation. The Company’s contributions to the plan totaled $17.8 million in 2015, $15.8 million in 2014, and $14.8 million in 2013.
Service Period Eligible to Participate for Employee Savings Plan	$ 30
Defined Contribution Plan, Employer Matching Contribution, Percent of Match	4.00%		2.50%
Discretionary Profit Sharing Contribution Percentage of Employees Salary	1.50%
Defined Benefit Plan, Contributions by Employer	$ 17,800,000	$ 15,800,000	$ 14,800,000

Stock Based Compensation (Details) - USD ($) $ / shares in Units, $ in Millions	1 Months Ended			12 Months Ended
	Jan. 31, 2012	Jan. 31, 2011	Jul. 31, 2009	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Apr. 28, 2010
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price				$ 18.48	$ 18.57	$ 18.55	$ 18.39
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number				269,589	470,356	622,945	738,792
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term				2 years 2 months	3 years 1 month	4 years 1 month	4 years 11 months
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number				164,589	316,356	422,945
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period				0	0	0
MaximumNumberOfSharesAvailableToBeGrantedUnderAwardStockPlan				14,400,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross				5,266,707			0
Stock Issued During Period, Shares, Share-based Compensation, Gross							12,610
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant				0
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value				$ 6.8	$ 8.4	$ 3.7
IncrementalIncreasesInAverageStockPriceFromInitialGrantPrice				20.00%
Share-based Compensation Arrangement by Share-based Payment Award, Award Requisite Service Period			20 years	15 years
AttainmentAgeOfStockPlan				attainment of age 64
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsSharesNotYetAwardedOutstandingNumber				8,000
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAwardedSharesOutstandingNumber				1,594,214
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsDistributedSharesOutstandingNumber				3,664,493
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit				$ 8.75
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit				$ 25.68
PerformanceStockPlan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodAwardedShares				(208,889)	(277,009)	(119,364)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period				(117,528)	(165,647)	(1,200,371)
ShareBasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAwardedInPeriod				0	0	122,021
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period				0	0	0
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodPriorYearAwardsIssuedGrantedInCurrentYear				0	0	0
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsNotYetAwardedInPeriod				0	0	0
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAwardedInPeriodWeightedAverageGrantDateFairValue				0	0	10.25
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNotYetAwardedInPeriod				0	0	(122,021)
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingWeightedAverageGrantDateFairValue				9.03	8.71	8.62	8.72
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value				$ 5.55	$ 16.76	$ 4.01
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period				(208,889)	(277,009)	(119,364)
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriodAwardedShares				(100,110)	(115,630)	(101,310)
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriodNotYetAwardedShares				(17,418)	(50,017)	(1,099,061)
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodSharesNotAwarded				0	0	0
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value				$ 9.78	$ 9.75	$ 8.73
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantedSharesOutstandingNumber				1,602,214	1,928,631	2,371,287	3,691,022
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsSharesNotYetAwardedOutstandingNumber				8,000	25,418	75,435	1,296,517
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value				$ 0	$ 0	$ 0
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAwardedSharesOutstandingNumber				1,594,214	1,903,213	2,295,852	2,394,505
Stock Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodAwardedShares				0	0	0
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period				(863,241)	(369,626)	(271,184)
ShareBasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAwardedInPeriod				0	0	966,215
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period				481,166	422,572	3,719,974
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodPriorYearAwardsIssuedGrantedInCurrentYear				164,646	113,088	0
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsNotYetAwardedInPeriod				316,520	309,484	3,719,974
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAwardedInPeriodWeightedAverageGrantDateFairValue				0	0	30.71
ShareBasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsGrantedSharesAwardedInPeriod						0
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNotYetAwardedInPeriod				0	0	(966,215)
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingWeightedAverageGrantDateFairValue				28.74	28.19	27.96	22.91
ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodUnderIncentiveSubPlan								2,375,892
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross				481,166	422,572	3,719,974			187,040
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested, Number of Shares				158,958	113,088	891,399
Share-based Compensation Arrangement by Share-based Payment Award, Accelerated Vesting, Number				0	0
Stock Issued During Period, Shares, Share-based Compensation, Gross	12,627	11,682		15,700	9,870			36,919
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant				2,793,832
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value				$ 0	$ 0	$ 0
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period				0	0	0
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriodAwardedShares				(95,542)	(47,915)	(7,906)
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriodNotYetAwardedShares				(767,699)	(321,711)	(263,278)
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodSharesNotAwarded				0	0	0
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value				$ 26.32	$ 27.41	$ 23.88
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantedSharesOutstandingNumber				6,276,972	6,659,047	6,606,101	3,157,311
SharesAvailableForIssuanceUnderStockIncentivePlan										6,046,768
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsSharesNotYetAwardedOutstandingNumber				5,146,978	5,598,157	5,610,384	3,119,903
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value				$ 31.74	$ 31	$ 31.95
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAwardedSharesOutstandingNumber				1,129,994	1,060,890	995,717	37,408
Stock Incentive Plan [Member] \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestingPeriod				5 years	3 years	3 years
Stock Incentive Plan [Member] \| Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestingPeriod				7 years	6 years
DecusInsuranceBrokersLimited [Member] \| Stock Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodUnderIncentiveSubPlan								24,670	5,205
Arrowhead General Insurance Agency, Inc. [Member] \| Stock Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross							814,545
Employee Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized				17,000,000
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant				5,194,928
EighteenPointFourEightExercisePrice [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price				$ 18.48
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number				269,589
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term				2 years 2 months
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number				164,589

Stock Based Compensation Summary of PSP Activity (Details) - shares	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAwardedSharesOutstandingNumber	1,594,214
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsSharesNotYetAwardedOutstandingNumber	8,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period	0	0	0

Stock Based Compensation Stock Incentive Plan (Details) - $ / shares	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2010	Apr. 21, 2000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price	$ 18.48	$ 18.48	$ 18.48
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross	5,266,707			0
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period	0	0	0
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAwardedSharesOutstandingNumber	1,594,214
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsSharesNotYetAwardedOutstandingNumber	8,000
PerformanceStockPlan [Member]
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingWeightedAverageGrantDateFairValue	9.03	8.71	8.62	8.72
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value	$ 0	$ 0	$ 0
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAwardedInPeriodWeightedAverageGrantDateFairValue	0	0	10.25
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value	$ 5.55	$ 16.76	$ 4.01
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value	$ 9.78	$ 9.75	$ 8.73
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantedSharesOutstandingNumber	1,602,214	1,928,631	2,371,287	3,691,022
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period	0	0	0
ShareBasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAwardedInPeriod	0	0	122,021
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNotYetAwardedInPeriod	0	0	(122,021)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period	208,889	277,009	119,364
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period	(117,528)	(165,647)	(1,200,371)
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAwardedSharesOutstandingNumber	1,594,214	1,903,213	2,295,852	2,394,505
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodPriorYearAwardsIssuedGrantedInCurrentYear	0	0	0
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodAwardedShares	(208,889)	(277,009)	(119,364)
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriodAwardedShares	(100,110)	(115,630)	(101,310)
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsSharesNotYetAwardedOutstandingNumber	8,000	25,418	75,435	1,296,517
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsNotYetAwardedInPeriod	0	0	0
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodSharesNotAwarded	0	0	0
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriodNotYetAwardedShares	(17,418)	(50,017)	(1,099,061)
Stock Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross	481,166	422,572	3,719,974		187,040
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingWeightedAverageGrantDateFairValue	28.74	28.19	27.96	22.91
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value	$ 31.74	$ 31	$ 31.95
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAwardedInPeriodWeightedAverageGrantDateFairValue	0	0	30.71
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value	$ 0	$ 0	$ 0
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value	$ 26.32	$ 27.41	$ 23.88
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantedSharesOutstandingNumber	6,276,972	6,659,047	6,606,101	3,157,311
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period	481,166	422,572	3,719,974
ShareBasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAwardedInPeriod	0	0	966,215
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNotYetAwardedInPeriod	0	0	(966,215)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period	0	0	0
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period	(863,241)	(369,626)	(271,184)
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAwardedSharesOutstandingNumber	1,129,994	1,060,890	995,717	37,408
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodPriorYearAwardsIssuedGrantedInCurrentYear	164,646	113,088	0
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodAwardedShares	0	0	0
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriodAwardedShares	(95,542)	(47,915)	(7,906)
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsSharesNotYetAwardedOutstandingNumber	5,146,978	5,598,157	5,610,384	3,119,903
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsNotYetAwardedInPeriod	316,520	309,484	3,719,974
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodSharesNotAwarded	0	0	0
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriodNotYetAwardedShares	(767,699)	(321,711)	(263,278)
Incentive Stock Option Plan [Member] \| Maximum [Member]
Shares held in Employee Stock Option Plan, Suspense Shares						4,800,000
EighteenPointFourEightExercisePrice [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price	$ 18.48

Stock Based Compensation Non Cash Stock Based Compensation Expense (Details) - USD ($)
$ in Thousands

12 Months Ended

Dec. 31, 2015

Dec. 31, 2014

Dec. 31, 2013

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Schedule of Compensation Cost for Share-based Payment Arrangements, Allocation of Share-based Compensation Costs by Plan [Table Text Block]

The non-cash stock-based compensation expense for the years ended December 31 is as follows:



(in thousands)	2015		2014		2013
Stock Incentive Plan	$	11,111	$	14,447	$	15,934
Employee Stock Purchase Plan	3,430		2,425		3,538
Performance Stock Plan	972		2,354		2,310
Incentive Stock Option Plan	—		137		821
Total	$	15,513	$	19,363	$	22,603

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Share-based Compensation

$ 15,513

$ 19,363

$ 22,603

Stock Incentive Plan [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Share-based Compensation

11,111

14,447

15,934

PerformanceStockPlan [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Share-based Compensation

972

2,354

2,310

Incentive Stock Option Plan [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Share-based Compensation

137

821

Employee Stock [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Share-based Compensation

$ 3,430

$ 2,425

$ 3,538

Stock Based Compensation Share Based Compensation Shares Authorized under Stock Option Plans, Exercise Price Range (Details) - $ / shares	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number	269,589	470,356	622,945	738,792
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term	2 years 2 months	3 years 1 month	4 years 1 month	4 years 11 months
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price	$ 18.48	$ 18.57	$ 18.55	$ 18.39
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number	164,589	316,356	422,945
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price	$ 18.48	$ 18.48	$ 18.48
EighteenPointFourEightExercisePrice [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Investment Options, Exercise Price	$ 18.48
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number	269,589
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term	2 years 2 months
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price	$ 18.48
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number	164,589
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price	$ 18.48
PerformanceStockPlan [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingWeightedAverageGrantDateFairValue	9.03	8.71	8.62	8.72

Stock Based Compensation Summary of Stock Options (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number	269,589	470,356	622,945	738,792
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price	$ 18.48	$ 18.57	$ 18.55	$ 18.39
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term	2 years 2 months	3 years 1 month	4 years 1 month	4 years 11 months
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value	$ 2,395	$ 5,087	$ 7,289	$ 8,891
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period	0	0	0
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price	$ 0	$ 0	$ 0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period	151,767	106,589	115,847
Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price	$ 18.48	$ 18.48	$ 17.56
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period	49,000	46,000	0
Share-based Compensation Arrangements by Share-based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price	$ 19.36	$ 18.48	$ 0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Expirations in Period	0	0	0
Share-based Compensation Arrangements by Share-based Payment Award, Options, Expirations in Period, Weighted Average Exercise Price	$ 0	$ 0	$ 0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number	269,589
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price	$ 18.48
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Term	2 years 2 months
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value	$ 2,395
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number	164,589	316,356	422,945
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price	$ 18.48	$ 18.48	$ 18.48
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term	2 years 2 months	3 years 2 months	4 years 2 months
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value	$ 2,241	$ 4,565	$ 5,460
EighteenPointFourEightExercisePrice [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Investment Options, Exercise Price	$ 18.48
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number	269,589
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price	$ 18.48
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term	2 years 2 months
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number	164,589
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price	$ 18.48
Stock Incentive Plan [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNotYetAwardedInPeriod	0	0	(966,215)
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodPriorYearAwardsIssuedGrantedInCurrentYear	164,646	113,088	0
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period	481,166	422,572	3,719,974

Stock Based Compensation Employee Stock Purchase Plan Details (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Aug. 31, 2015	Jul. 31, 2015	Dec. 31, 2014	Aug. 31, 2014	Jul. 31, 2014	Dec. 31, 2013	Aug. 31, 2013	Jul. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant	0
Share-based Compensation Arrangement by Share-based Payment Award, Maximum Employee Subscription Rate	10.00%
Employee Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
AllottedValueMaximum	$ 25,000
Employee Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant	5,194,928
ThresholdPeriodWorkedPerWeekByEmployees	20
ShareBasedCompensationArrangementByShareBasedPaymentAwardSubscriptionPeriodBeginning	August 1
ShareBasedCompensationArrangementByShareBasedPaymentAwardSubscriptionPeriodEnding	July 31
Share-based Compensation Arrangement by Share-based Payment Award, Purchase Price of Common Stock, Percent	85.00%
ShareBasedCompensationArrangementByShareBasedPaymentAwardPercentOfMarketPrice	15.00%
ValueOfOneYearStockOptionPercentage	85.00%
EstimatedFairValuePerShareOption		$ 6.43			$ 6.39			$ 8.36
Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period			539,389			512,521			487,672
ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesIssuedAggregatePurchaseValue			$ 14,400,000			$ 13,400,000			$ 10,500,000
ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesIssuedAggregatePurchasePricePerShare			$ 26.62			$ 26.16			$ 21.44
Shares held in Employee Stock Option Plan, Suspense Shares	231,803			235,794			222,526
CashReceivedFromProceedsByParticipants	$ 6,800,000			$ 6,300,000			$ 5,900,000
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized	17,000,000

Stock Based Compensation Incentive Stock Option Plan (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Apr. 21, 2000
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value	$ 2.2	$ 1.3	$ 1.6
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant	0
PerformanceStockPlan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNotYetAwardedInPeriod	0	0	(122,021)
Incentive Stock Option Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
PercentageOfPreTaxIncome	15.00%
Incentive Stock Option Plan [Member] \| Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestingPeriod	10 years
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	6 years
Shares held in Employee Stock Option Plan, Suspense Shares				4,800,000
Incentive Stock Option Plan [Member] \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestingPeriod	1 year
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	3 years

Stock Based Compensation Unrecognized Compensation Costs (Details) $ in Millions	12 Months Ended
	Dec. 31, 2015 USD ($)
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized	$ 115.0
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition	5 years 1 month

Stock Based Compensation Schedule of compensation cost for share-based payment arrangements, allocation of share-based compensation costs by plan (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation	$ 15,513	$ 19,363	$ 22,603
Stock Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation	11,111	14,447	15,934
PerformanceStockPlan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation	972	2,354	2,310
Incentive Stock Option Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation	$ 0	$ 137	$ 821

Stock Based Compensation Schedule of Share Based Compensation, Stock Options Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Apr. 28, 2010
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAwardedSharesOutstandingNumber	1,594,214
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsSharesNotYetAwardedOutstandingNumber	8,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number	269,589	470,356	622,945	738,792
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price	$ 18.48	$ 18.57	$ 18.55	$ 18.39
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term	2 years 2 months	3 years 1 month	4 years 1 month	4 years 11 months
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value	$ 2,395	$ 5,087	$ 7,289	$ 8,891
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period	0	0	0
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price	$ 0	$ 0	$ 0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period	(151,767)	(106,589)	(115,847)
Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price	$ 18.48	$ 18.48	$ 17.56
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period	(49,000)	(46,000)	0
Share-based Compensation Arrangements by Share-based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price	$ 19.36	$ 18.48	$ 0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Expirations in Period	0	0	0
Share-based Compensation Arrangements by Share-based Payment Award, Options, Expirations in Period, Weighted Average Exercise Price	$ 0	$ 0	$ 0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number	269,589
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price	$ 18.48
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Term	2 years 2 months
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value	$ 2,395
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number	164,589	316,356	422,945
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price	$ 18.48	$ 18.48	$ 18.48
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term	2 years 2 months	3 years 2 months	4 years 2 months
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value	$ 2,241	$ 4,565	$ 5,460
Stock Incentive Plan [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
SharesAvailableForIssuanceUnderStockIncentivePlan					6,046,768
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantedSharesOutstandingNumber	6,276,972	6,659,047	6,606,101	3,157,311
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value	$ 31.74	$ 31	$ 31.95
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAwardedSharesOutstandingNumber	1,129,994	1,060,890	995,717	37,408
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsSharesNotYetAwardedOutstandingNumber	5,146,978	5,598,157	5,610,384	3,119,903
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period	481,166	422,572	3,719,974
PerformanceStockPlan [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantedSharesOutstandingNumber	1,602,214	1,928,631	2,371,287	3,691,022
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value	$ 0	$ 0	$ 0
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAwardedSharesOutstandingNumber	1,594,214	1,903,213	2,295,852	2,394,505
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsSharesNotYetAwardedOutstandingNumber	8,000	25,418	75,435	1,296,517
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period	0	0	0

Supplemental Disclosures of Cash Flow Information and Non-Cash Financing and Investing Activities - Significant Non-Cash Investing and Financing Activities (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Supplemental Cash Flow Elements [Abstract]
Change in Cash and Cash Equivalents due to reclass from Restricted Cash	$ 33,000	$ 32,200
Cash paid during the period for:
Interest	37,542	25,115	$ 16,501
Income taxes	132,874	118,290	110,190
Significant non-cash investing and financing activities
Other payables issued for purchased customer accounts	10,029	1,930	1,425
Estimated acquisition earn-out payables and related charges	36,899	33,229	5,091
Notes received on the sale of fixed assets and customer accounts	$ 7,755	$ 6,340	$ 1,108

Commitments and Contingencies (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Commitments and Contingencies Disclosure [Abstract]
Operating Leases, Rent Expense	$ 46,000	$ 49,000	$ 43,000
Operating Leases, Future Minimum Payments Due, Next Twelve Months	40,900
Operating Leases, Future Minimum Payments, Due in Two Years	37,109
Operating Leases, Future Minimum Payments, Due in Three Years	31,612
Operating Leases, Future Minimum Payments, Due in Four Years	25,962
Operating Leases, Future Minimum Payments, Due in Five Years	21,283
Operating Leases, Future Minimum Payments, Due Thereafter	38,406
Operating Leases, Future Minimum Payments Due	$ 195,272

Quarterly Operating Results (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Quarterly Financial Information Disclosure [Abstract]
Gain (Loss) on Disposition of Business										$ 47,400
Total revenues	$ 404,597	$ 432,167	$ 419,447	$ 404,298	$ 393,020	$ 421,418	$ 397,764	$ 363,594	$ 1,660,509	1,575,796	$ 1,363,279
Operating Expenses	309,560	319,337	318,533	310,520	354,574	308,733	295,983	276,757	1,257,950	1,236,047	1,005,670
Income before income taxes	95,037	112,830	100,914	93,778	38,446	112,685	101,781	86,837	402,559	339,749	357,609
Net Income (Loss) Attributable to Parent	$ 57,935	$ 67,427	$ 61,005	$ 56,951	$ 24,395	$ 68,331	$ 61,755	$ 52,415	$ 243,318	$ 206,896	$ 217,112
Earnings Per Share, Basic	$ 0.0041	$ 0.0048	$ 0.0043	$ 0.0040	$ 0.0017	$ 0.0047	$ 0.0043	$ 0.0036	$ 1.72	$ 1.43	$ 1.50
Diluted (in dollars per share)	$ 0.0041	$ 0.0047	$ 0.0043	$ 0.0039	$ 0.0017	$ 0.0047	$ 0.0042	$ 0.0036	$ 1.70	$ 1.41	$ 1.48

- Definition

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

+ References + Details

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References + Details

Segment Information - Additional Information (Detail) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015 USD ($)	Sep. 30, 2015 USD ($)	Jun. 30, 2015 USD ($)	Mar. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Sep. 30, 2014 USD ($)	Jun. 30, 2014 USD ($)	Mar. 31, 2014 USD ($)	Dec. 31, 2015 USD ($) Segment	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments \| Segment									4
Total revenues	$ 404,597	$ 432,167	$ 419,447	$ 404,298	$ 393,020	$ 421,418	$ 397,764	$ 363,594	$ 1,660,509	$ 1,575,796	$ 1,363,279
London, Bermuda and Cayman Islands
Segment Reporting Information [Line Items]
Total revenues									$ 13,400	$ 13,300	$ 12,200

Segment Information - Summarized Financial Information Reportable Segments (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Segment Reporting Information [Line Items]
Total revenues	$ 404,597	$ 432,167	$ 419,447	$ 404,298	$ 393,020	$ 421,418	$ 397,764	$ 363,594	$ 1,660,509	$ 1,575,796	$ 1,363,279
Investment income									1,004	747	638
Amortization									87,421	82,941	67,932
Depreciation									20,890	20,895	17,485
Interest expense									39,248	28,408	16,440
Income before income taxes	95,037	$ 112,830	$ 100,914	$ 93,778	38,446	$ 112,685	$ 101,781	$ 86,837	402,559	339,749	357,609
Total assets	5,012,739				4,956,458				5,012,739	4,956,458	3,649,508
Capital expenditures									18,375	24,923	16,366
Operating Segments \| Retail
Segment Reporting Information [Line Items]
Total revenues									870,346	823,686	737,349
Investment income									87	67	82
Amortization									45,145	42,935	38,523
Depreciation									6,558	6,449	5,874
Interest expense									41,036	43,502	34,658
Income before income taxes									181,938	157,491	161,787
Total assets	3,507,476				3,229,484				3,507,476	3,229,484	3,012,688
Capital expenditures									6,797	6,873	6,886
Operating Segments \| National Programs
Segment Reporting Information [Line Items]
Total revenues									428,734	404,239	301,372
Investment income									210	164	19
Amortization									28,479	25,129	14,953
Depreciation									7,250	7,805	5,492
Interest expense									55,705	49,663	24,014
Income before income taxes									67,673	73,178	61,223
Total assets	2,505,752				2,455,749				2,505,752	2,455,749	1,377,404
Capital expenditures									6,001	14,133	4,810
Operating Segments \| Wholesale Brokerage
Segment Reporting Information [Line Items]
Total revenues									216,996	211,911	193,710
Investment income									150	26	22
Amortization									9,739	10,703	10,719
Depreciation									2,142	2,470	2,674
Interest expense									891	1,294	2,316
Income before income taxes									64,708	8,276	47,501
Total assets	895,782				857,804				895,782	857,804	865,731
Capital expenditures									3,084	1,526	1,825
Operating Segments \| Services
Segment Reporting Information [Line Items]
Total revenues									145,365	136,558	131,489
Investment income									42	3	1
Amortization									4,019	4,135	3,698
Depreciation									1,988	2,213	1,623
Interest expense									5,970	7,678	7,322
Income before income taxes									19,713	17,870	25,791
Total assets	285,459				296,034				285,459	296,034	277,652
Capital expenditures									1,088	1,210	1,811
Other
Segment Reporting Information [Line Items]
Total revenues									(932)	(598)	(641)
Investment income									515	487	514
Amortization									39	39	39
Depreciation									2,952	1,958	1,822
Interest expense									(64,354)	(73,729)	(51,870)
Income before income taxes									68,527	82,934	61,307
Total assets	$ (2,181,730)				$ (1,882,613)				(2,181,730)	(1,882,613)	(1,883,967)
Capital expenditures									$ 1,405	$ 1,181	$ 1,034

Losses and Loss Adjustment Reserve - Effects of Reinsurance on Premiums Written and Earned (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2015 USD ($)
Written
Direct premiums	$ 599,828
Assumed premiums	0
Ceded premiums	599,807
Net premiums	21
Earned
Direct premiums	610,753
Assumed premiums	18
Ceded premiums	610,750
Net premiums	$ 21

Losses and Loss Adjustment Reserve - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2015 USD ($) Reinsurer	Dec. 31, 2014 USD ($)	Sep. 30, 2015
Reinsurance Premiums for Insurance Companies, by Product Segment [Line Items]
Ceded rate of premiums under insurance program	100.00%
Premiums written net	$ 599,807,000
Ceded unpaid loss	32,000,000	$ 13,000,000
The reinsurance recoverable	341,600,000	333,600,000
Prepaid reinsurance premiums	309,643,000	320,586,000
Increase (Decrease) in Loss and Loss Adjustment Expense Reserve	0
Reserve for losses and loss adjustment expense	$ 32,000,000	13,000,000
Number of reinsurers \| Reinsurer	3
Homeowners
Reinsurance Premiums for Insurance Companies, by Product Segment [Line Items]
Ceded unpaid loss	$ 8,698
Reinsurance recoverable, incurred but not reported claims	10,335
Private Passenger Auto Liability
Reinsurance Premiums for Insurance Companies, by Product Segment [Line Items]
Ceded unpaid loss	16,132
Reinsurance recoverable, incurred but not reported claims	14,383
Other Liability
Reinsurance Premiums for Insurance Companies, by Product Segment [Line Items]
Ceded unpaid loss	4,179
Reinsurance recoverable, incurred but not reported claims	$ 8,456
Wright Flood
Reinsurance Premiums for Insurance Companies, by Product Segment [Line Items]
Ceded rate of premiums under insurance program	100.00%
Expenses and allowance rate received in premiums	30.90%		30.80%
Premiums written net	$ 598,400,000	439,100,000
Wright Flood \| Quota Share Agreement
Reinsurance Premiums for Insurance Companies, by Product Segment [Line Items]
Effective cedes rate under quota share agreement	100.00%
Commission rate, percent of ceded written premiums	30.50%
Wright Flood \| Quota Share Agreement \| Ceded Credit Risk, Concentrated Credit Risk
Reinsurance Premiums for Insurance Companies, by Product Segment [Line Items]
Ceded amount	$ 1,400,000	$ 800,000

Statutory Financial Information - Additional Information (Detail) - Wright Flood - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Statutory Accounting Practices [Line Items]
Statutory capital and surplus required	$ 7,500,000
Statutory capital and surplus	15,100,000	$ 10,900,000
Statutory net Income	$ 4,100,000	$ 2,300,000

Subsidiary Dividend Restrictions - Additional Information (Detail) - Wright Flood - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2016
Dividend Restrictions [Line Items]
Dividend rate as a percentage of net income	100.00%
Ordinary dividends payment description	The maximum amount of ordinary dividends that Wright Flood can pay to shareholders in a rolling twelve month period is limited to the greater of 10% of statutory adjusted capital and surplus as shown on Wright Flood’s last annual statement on file with the superintendent or 100% of adjusted net income.
Scenario, Forecast
Dividend Restrictions [Line Items]
Maximum dividend payout that may be made without prior approval		$ 4.1
Maximum
Dividend Restrictions [Line Items]
Dividend rate as a percentage of net income	10.00%

Shareholders' Equity - Additional Information (Detail) - USD ($)	Sep. 02, 2014	Dec. 31, 2015	Nov. 11, 2015	Aug. 11, 2015	Jul. 20, 2015	Mar. 05, 2015	Dec. 31, 2014	Jun. 30, 2014
Accelerated Share Repurchases [Line Items]
Stock Repurchase Program, Authorized Amount		$ 100,000,000			$ 400,000,000			$ 25,000,000
Treasury stock shares (in shares)		7,430,000		3,059,629			2,385,000
Fair value of common stock repurchased		$ 238,775,000					$ 75,025,000
Accelerated Share Repurchase Agreement
Accelerated Share Repurchases [Line Items]
Shares repurchased, aggregate repurchase amount	$ 50,000,000
Total number of shares repurchased (in shares)	1,539,760
Second Accelerated Share Repurchase Agreement
Accelerated Share Repurchases [Line Items]
Shares repurchased, aggregate repurchase amount						$ 100,000,000
Treasury stock shares (in shares)				391,637		2,667,992
Fair value of common stock repurchased						$ 85,000,000
Third Accelerated Share Repurchase Agreement [Member]
Accelerated Share Repurchases [Line Items]
Shares repurchased, aggregate repurchase amount			$ (75,000,000)
Treasury stock shares (in shares)			1,985,981
Fair value of common stock repurchased			$ 63,750,000

Shareholders' Equity Repurchase Program (Details) - USD ($)	Jan. 06, 2016	Dec. 31, 2015	Aug. 11, 2015	Jul. 20, 2015	Dec. 31, 2014	Jul. 21, 2014	Jun. 30, 2014
Accelerated Share Repurchases [Line Items]
Treasury Stock, Shares		7,430,000	3,059,629		2,385,000
Stock Repurchase Program, Number of Shares Authorized to be Repurchased			50,000,000
Stock Repurchase Program, Authorized Amount		$ 100,000,000		$ 400,000,000			$ 25,000,000
Maximum
Accelerated Share Repurchases [Line Items]
Stock Repurchase Program, Authorized Amount				$ 450,000,000		$ 200,000,000
Third Accelerated Share Repurchase Agreement [Member]
Accelerated Share Repurchases [Line Items]
Treasury Stock, Shares	363,209
Stock Repurchase Program, Authorized Amount	$ 375,000,000

Statutory Financial Information	12 Months Ended
Statutory Financial Information	Dec. 31, 2015
Statutory Accounting Practices [Abstract]
Statutory Financial Information	Statutory Financial Information Wright Flood maintains minimum amounts of statutory capital and surplus of $7.5 million as required by regulatory authorities. Wright Flood’s statutory capital and surplus exceeded their respective minimum statutory requirements. The statutory capital and surplus of Wright Flood was $15.1 million as of December 31, 2015 and $10.9 million as of December 31, 2014. As of December 31, 2015 and 2014, Wright Flood generated statutory net income of $4.1 million and $2.3 million, respectively.

Summary of Significant Accounting Policies Amortizable Intangible Assets (Details)	12 Months Ended
	Dec. 31, 2015
Minimum
Indefinite-lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	5 years
Maximum
Indefinite-lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	15 years

Nature of Operations - Additional Information (Detail)	12 Months Ended
Nature of Operations - Additional Information (Detail)	Dec. 31, 2015 Segment
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of reportable segments	4