Document and Entity Information - shares	6 Months Ended
Document and Entity Information - shares	Jun. 30, 2016	Aug. 02, 2016
Document And Entity Information [Abstract]
Document Type	10-Q/A
Amendment Flag	true
Amendment Description	Updated XBRL
Document Period End Date	Jun. 30, 2016
Document Fiscal Year Focus	2016
Document Fiscal Period Focus	Q2
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		139,811,085

CONDENSED CONSOLIDATED STATEMENTS OF INCOME (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
REVENUES
Commissions and fees	$ 445,662	$ 417,244	$ 867,997	$ 821,025
Investment income	502	260	920	480
Other income, net	354	1,943	1,774	2,240
Total revenues	446,518	419,447	870,691	823,745
EXPENSES
Employee compensation and benefits	231,102	217,601	455,161	429,263
Other operating expenses	66,291	64,377	129,896	125,470
Gain on disposal	(810)	(348)	(2,854)	(605)
Amortization	21,610	21,623	43,220	43,248
Depreciation	5,354	5,237	10,672	10,420
Interest	9,837	9,671	19,734	19,522
Change in estimated acquisition earn-out payables	4,057	372	3,236	1,735
Total expenses	337,441	318,533	659,065	629,053
Income before income taxes	109,077	100,914	211,626	194,692
Income taxes	42,827	39,909	83,306	76,736
Net income	$ 66,250	$ 61,005	$ 128,320	$ 117,956
Net income per share:
Basic (in dollars per share)	$ 0.47	$ 0.43	$ 0.92	$ 0.83
Diluted (in dollars per share)	0.47	0.43	0.91	0.82
Dividends declared per share (in dollars per share)	$ 0.12	$ 0.11	$ 0.245	$ 0.22

CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Current Assets:
Cash and cash equivalents	$ 453,939	$ 443,420
Restricted cash and investments	277,646	229,753
Short-term investments	16,077	13,734
Premiums, commissions and fees receivable	472,227	433,885
Reinsurance recoverable	60,812	31,968
Prepaid reinsurance premiums	298,907	309,643
Deferred income taxes	15,552	24,635
Other current assets	52,107	50,351
Total current assets	1,647,267	1,537,389
Fixed assets, net	80,488	81,753
Goodwill	2,665,347	2,586,683
Amortizable intangible assets, net	745,352	744,680
Investments	22,992	18,092
Other assets	45,431	35,882
Total assets	5,206,877	5,004,479
Current Liabilities:
Premiums payable to insurance companies	667,180	574,736
Losses and loss adjustment reserve	60,812	31,968
Unearned premiums	298,907	309,643
Premium deposits and credits due customers	95,147	83,098
Accounts payable	91,594	63,910
Accrued expenses and other liabilities	163,523	192,067
Current portion of long-term debt	80,492	73,125
Total current liabilities	1,457,655	1,328,547
Long-term debt less unamortized discount and debt issuance costs	1,045,004	1,071,618
Deferred income taxes, net	371,099	360,949
Other liabilities	80,872	93,589
Shareholders’ Equity:
Common stock, par value $0.10 per share; authorized 280,000 shares; issued 147,694 shares and outstanding 139,900 shares at 2016, issued 146,415 shares and outstanding 138,985 shares at 2015	14,769	14,642
Additional paid-in capital	445,901	426,498
Treasury stock, at cost 7,794 and 7,430 shares at 2016 and 2015, respectively	(250,025)	(238,775)
Retained earnings	2,041,602	1,947,411
Total shareholders’ equity	2,252,247	2,149,776
Total liabilities and shareholders’ equity	$ 5,206,877	$ 5,004,479

CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED) (Parenthetical) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
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)	147,694,000		146,415,000
Common stock, shares outstanding (in shares)	139,900,000		138,985,000
Treasury stock shares (in shares)	7,794,000		7,430,000
Tax effect of accumulated other comprehensive income	$ 0	$ 0

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Cash flows from operating activities:
Net income	$ 128,320	$ 117,956
Adjustments to reconcile net income to net cash provided by operating activities:
Amortization	43,220	43,248
Depreciation	10,672	10,420
Non-cash stock-based compensation	6,674	12,459
Change in estimated acquisition earn-out payables	3,236	1,735
Deferred income taxes	15,907	10,745
Amortization of debt discount	79	79
Deferred Finance Costs, Own-share Lending Arrangement, Issuance Costs, Amortization Expense	807	804
Accretion (Amortization) of Discounts and Premiums, Investments	47	0
Income tax benefit from exercise of shares from the stock benefit plans	(6,816)	(1,827)
Payments On Acquisition Earn Outs In Excess Of Original Estimated Payables	(3,550)	(2,778)
Net gain on sales of investments, fixed assets and customer accounts	(2,700)	(478)
Changes in operating assets and liabilities, net of effect from acquisitions and divestitures:
Restricted cash and investments (increase) decrease	(47,893)	13,876
Premiums, commissions and fees receivable (increase) decrease	(34,099)	11,109
Reinsurance recoverables (increase)	(28,844)	(66,174)
Prepaid reinsurance premiums decrease	10,736	18,008
Other assets (increase)	(11,272)	(20,872)
Premiums payable to insurance companies increase	90,068	36,851
Premium deposits and credits due customers increase	12,049	2,211
Losses and loss adjustment reserve increase	28,844	66,174
Unearned premiums (decrease)	(10,736)	(18,008)
Accounts payable increase	34,156	16,375
Accrued expenses and other liabilities (decrease)	(29,765)	(21,935)
Other liabilities (decrease)	(18,346)	(2,594)
Net cash provided by operating activities	190,794	227,384
Cash flows from investing activities:
Additions to fixed assets	(8,944)	(8,597)
Payments for businesses acquired, net of cash acquired	(107,290)	(105,056)
Proceeds from sales of fixed assets and customer accounts	3,291	3,998
Purchases and proceeds from sales of investments	(7,026)	(913)
Net cash used in investing activities	(119,969)	(110,568)
Cash flows from financing activities:
Payments on acquisition earn-outs	(7,012)	(11,261)
Payments on long-term debt	(20,625)	(31,875)
Income tax benefit from exercise of shares from the stock benefit plans	6,816	1,827
Issuances of common stock for employee stock benefit plans	916	500
Repurchase Of Stock Benefit Plan Shares For Employees To Fund Tax Withholdings	(6,273)	(2,168)
Purchase of treasury stock	(11,250)	(85,000)
Settlement (Prepayment) of accelerated share repurchase program	11,250	(15,000)
Cash dividends paid	(34,128)	(31,280)
Net cash (used in) financing activities	(60,306)	(174,257)
Net increase (decrease) in cash and cash equivalents	10,519	(57,441)
Cash and cash equivalents at beginning of period	443,420
Cash and cash equivalents at end of period	$ 453,939	$ 412,607

Nature of Operations	6 Months Ended
Nature of Operations	Jun. 30, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Nature of Operations	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.

Basis of Financial Reporting	6 Months Ended
Basis of Financial Reporting	Jun. 30, 2016
Condensed Financial Information of Parent Company Only Disclosure [Abstract]
Basis of Financial Reporting	Basis of Financial Reporting The accompanying unaudited Condensed Consolidated Financial Statements have been prepared in accordance with U.S. GAAP for interim financial information and with the instructions for Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by U.S. GAAP for complete financial statements. In the opinion of management, all adjustments (consisting of normal recurring accruals) considered necessary for a fair presentation have been included. These unaudited Condensed Consolidated Financial Statements should be read in conjunction with the audited Consolidated Financial Statements and the notes thereto set forth in the Company’s Annual Report on Form 10-K for the year ended December 31, 2015. The preparation of these financial statements in conformity with 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. In April 2015, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update ("ASU") 2015-03, "Simplifying the Presentation of Debt Issuance Costs". The guidance 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 the debt liability, consistent with debt discounts, and not recorded as a separate asset. The reason for the change is to align the treatment of debt issuance costs and debt discounts so that both reduce the carrying value of the liability. In August 2015, the FASB clarified that its guidance does not apply to line-of credit arrangements. This guidance requires retrospective application and is effective for fiscal years beginning after December 15, 2015 and for interim periods within those fiscal years, with early adoption permitted. The Company adopted the guidance on January 1, 2016, as required. As a result, the Company retrospectively applied the guidance to the 2015 Consolidated Balance Sheet by reclassifying $8.3 million from other assets to long term debt. The Company has condensed the presentation of non-cash stock based compensation into the employee compensation and benefits line. The non-cash stock based compensation shown in the 2015 Consolidated Statement of Income was $15.5 million for the full year. Recently Issued Accounting Pronouncements In March 2016, the FASB issued ASU 2016-08, "Principal Versus Agent Considerations (Reporting Revenue Gross Versus Net)" ("ASU 2016-08") to clarify certain aspects of the principal-versus-agent guidance included in the new revenue standard ASU 2014-09 "Revenue from Contracts with Customers" ("ASU 2014-09"). The FASB issued the ASU in response to concerns identified by stakeholders, including those related to (1) determining the appropriate unit of account under the revenue standard’s principal-versus-agent guidance and (2) applying the indicators of whether an entity is a principal or an agent in accordance with the revenue standard’s control principle. ASU 2016-08 is effective for the Company beginning January 1, 2018. The impact of ASU 2016-08 is currently being evaluated along with ASU 2014-09. In March 2016, the FASB issued ASU 2016-09, "Improvements to Employee Share Based Payment Accounting" ("ASU 2016-09"), which amends guidance issued in Accounting Standards Codification ("ASC") Topic 718, Compensation – Stock Compensation. ASU 2016-09 simplifies several aspects of the accounting for share-based payment transactions, including the income tax consequences, classification of awards as either equity or liabilities, and classification on the statement of cash flows. ASU 2016-09 is effective for fiscal years beginning after December 15, 2016, and interim periods within those fiscal years and early adoption is permitted. The Company is currently in the process of evaluating the impact of adoption of the ASU on its consolidated financial statements. In February 2016, the FASB issued 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 with the primary effect of adopting the new standard being the requirement to record assets and obligations for operating leases with original terms greater than twelve months. 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 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 our Consolidated Financial Statements. In May 2014, FASB issued 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.

- Definition

The entire disclosure for condensed financial information, including the financial position, cash flows, and the results of operations of the registrant (parent company) as of the same dates or for the same periods for which audited consolidated financial statements are being presented. Alternatively, the details of this disclosure can be reported by the specific parent company taxonomy elements, indicating the appropriate date and period contexts in an instance document.

+ References + Details

Net Income Per Share

6 Months Ended

Jun. 30, 2016

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 three months ended June 30,						For the six months ended June 30,
(in thousands, except per share data)	2016			2015			2016			2015
Net income	$	66,250		$	61,005		$	128,320		$	117,956
Net income attributable to unvested awarded performance stock	(1,896		)	(1,439		)	(3,337		)	(2,802		)
Net income attributable to common shares	$	64,354		$	59,566		$	124,983		$	115,154
Weighted average number of common shares outstanding – basic	139,998			140,839			139,395			141,803
Less unvested awarded performance stock included in weighted average number of common shares outstanding – basic	(4,006		)	(3,321		)	(3,625		)	(3,369		)
Weighted average number of common shares outstanding for basic earnings per common share	135,992			137,518			135,770			138,434
Dilutive effect of stock options	1,589			2,310			1,490			2,213
Weighted average number of shares outstanding – diluted	137,581			139,828			137,260			140,647
Net income per share:
Basic	$	0.47		$	0.43		$	0.92		$	0.83
Diluted	$	0.47		$	0.43		$	0.91		$	0.82

Business Combinations

6 Months Ended

Jun. 30, 2016

Business Combinations [Abstract]

Business Combinations

During the six months ended June 30, 2016, Brown & Brown acquired the assets and assumed certain liabilities of four insurance intermediaries and all of the stock of one insurance intermediary. 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 Condensed 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 Condensed Consolidated Financial Statements may be provisional and thus subject to further adjustments within the permitted measurement period, as defined in ASC 805. For the six months ended June 30, 2016, several adjustments were made within the permitted measurement period that resulted in a decrease in the aggregate purchase price of the affected acquisitions of $917,497 relating to the assumption of certain liabilities. These measurement period adjustments have been reflected as current period adjustments in the six months ended June 30, 2016 in accordance with the guidance in ASU 2015-16 "Business Combinations". The measurement period adjustments impacted goodwill, with no effect on earnings or cash in the current period.

Cash paid for acquisitions was $109.4 million and $105.1 million in the six-month periods ended June 30, 2016 and 2015, respectively. We completed five acquisitions (excluding book of business purchases) in the six-month period ended June 30, 2016. We also completed seven acquisitions (excluding book of business purchases) in the six-month period ended June 30, 2015.

The following table summarizes the purchase price allocation made as of the date of each acquisition for current year acquisitions and adjustments made during the measurement period for prior year acquisitions. The purchase price allocation for Social Security Advocates for the Disabled ("SSAD") and Morstan General Agency, Inc. ("Morstan") are provisional as they are based on initial valuations. The primary areas of the preliminary purchase price allocations for SSAD and Morstan that are not yet finalized relate to the fair value of certain tangible and intangible assets acquired and liabilities assumed, assets and liabilities related to income taxes and residual goodwill. During the measurement periods, the Company will adjust assets or liabilities if new information is obtained about facts and circumstances that existed as of the acquisition date that, if known, would have resulted in the recognition of those assets and liabilities as of that date. With the Company's adoption of ASU No. 2015-16 in the first fiscal quarter of 2016, these adjustments will be made in the period in which the amounts are determined and the current period income effect of such adjustments will be calculated as if the adjustments had been completed as of the acquisition date.



(in thousands)
Name	Business Segment	Effective Date of Acquisition	Cash Paid		Note Payable		Other Payable		Recorded Earn-Out Payable			Net Assets Acquired		Maximum Potential Earn- Out Payable
Social Security Advocates for the Disabled (SSAD)	Services	February 1, 2016	$	32,526	$	492	$	—	$	971		$	33,989	$	3,000
Morstan General Agency, Inc. (Morstan)	Wholesale	June 1, 2016	66,050		—		10,200		1,885			78,135		5,000
Other	Various	Various	10,808		—		300		(463		)	10,645		3,864
Total			$	109,384	$	492	$	10,500	$	2,393		$	122,769	$	11,864

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



(in thousands)	SSAD			Morstan			Other			Total
Cash	$	2,094		$	—		$	—		$	2,094
Other current assets	1,042			2,482			753			4,277
Fixed assets	307			300			42			649
Goodwill	22,321			49,954			6,389			78,664
Purchased customer accounts	13,069			26,775			4,291			44,135
Non-compete agreements	72			39			73			184
Total assets acquired	38,905			79,550			11,548			130,003
Other current liabilities	(1,686		)	(1,415		)	(903		)	(4,004		)
Deferred income tax, net	(3,230		)	—			—			(3,230		)
Total liabilities assumed	(4,916		)	(1,415		)	(903		)	(7,234		)
Net assets acquired	$	33,989		$	78,135		$	10,645		$	122,769

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 $78,664,000, which is net of any opening balance sheet adjustments within the allowable measurement period, was allocated to the Retail, National Programs, Wholesale Brokerage and Service Segments in the amounts of $6,366,000, $(1,000), $49,978,000 and $22,321,000, respectively. Of the total goodwill of $78,664,000, $54,920,000 is currently deductible for income tax purposes and $21,351,000 is non-deductible. The remaining $2,393,000 relates to the recorded earn-out payables and will not be deductible until it is earned and paid.

For the acquisitions completed during 2016, the results of operations since the acquisition dates have been combined with those of the Company. The total revenues from the acquisitions completed through June 30, 2016, included in the Condensed Consolidated Statement of Income for the three and six months ended June 30, 2016, were $6,342,000 and $8,870,000 , respectively. The income before income taxes, including the intercompany cost of capital charge, from the acquisitions completed through June 30, 2016, included in the Condensed Consolidated Statement of Income for the three and six months ended June 30, 2016, were $830,000 and $1,400,000. 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 three months ended June 30,				For the six months ended June 30,
(in thousands, except per share data)	2016		2015		2016		2015
Total revenues	$	452,240	$	432,324	$	885,956	$	848,183
Income before income taxes	$	110,064	$	103,442	$	214,403	$	199,568
Net income	$	66,849	$	62,533	$	130,004	$	120,910
Net income per share:
Basic	$	0.48	$	0.44	$	0.93	$	0.85
Diluted	$	0.47	$	0.44	$	0.92	$	0.84
Weighted average number of shares outstanding:
Basic	135,992		137,518		135,770		138,434
Diluted	137,581		139,828		137,260		140,647

As of June 30, 2016 and 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 three and six months ended June 30, 2016 and 2015, were as follows:



	For the three months ended June 30,						For the six months ended June 30,
(in thousands)	2016			2015			2016			2015
Balance as of the beginning of the period	$	69,095		$	77,709		$	78,387		$	75,283
Additions to estimated acquisition earn-out payables	1,787			21,480			2,393			27,134
Payments for estimated acquisition earn-out payables	(1,485		)	(9,448		)	(10,562		)	(14,039		)
Subtotal	69,397			89,741			70,218			88,378
Net change in earnings from estimated acquisition earn-out payables:
Change in fair value on estimated acquisition earn-out payables	3,385			(342		)	1,822			334
Interest expense accretion	672			714			1,414			1,401
Net change in earnings from estimated acquisition earn-out payables	4,057			372			3,236			1,735
Balance as of June 30,	$	73,454		$	90,113		$	73,454		$	90,113

Of the $73.5 million estimated acquisition earn-out payables as of June 30, 2016, $38.7 million was recorded as accounts payable and $34.8 million was recorded as other non-current liabilities. Included within the additions to estimated acquisition earn-out payables are any adjustments to opening balance sheet items within the allowable measurement period, which may therefore differ from previously reported amounts.

- 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=65885119&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
-URI http://asc.fasb.org/extlink&oid=65885119&loc=d3e1490-128463

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=65885119&loc=d3e1392-128463

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e7008-128479

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
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+ Details

Goodwill

6 Months Ended

Jun. 30, 2016

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill

Goodwill is subject to at least an annual assessment for impairment by applying a fair value-based test. The Company completed its most recent annual assessment as of November 30, 2015, and identified no impairment as a result of the evaluation.

The changes in the carrying value of goodwill by reportable segment for the six months ended June 30, 2016 are as follows:



(in thousands)	Retail		National Programs			Wholesale Brokerage		Services		Total
Balance as of January 1, 2016	$	1,345,636	$	901,866		$	226,961	$	112,220	$	2,586,683
Goodwill of acquired businesses	6,366		(1		)	49,978		22,321		78,664
Goodwill of transferred businesses	571		(571		)	—		—		—
Balance as of June 30, 2016	$	1,352,573	$	901,294		$	276,939	$	134,541	$	2,665,347

- 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

6 Months Ended

Jun. 30, 2016

Goodwill and Intangible Assets Disclosure [Abstract]

Amortizable Intangible Assets

Amortizable intangible assets at June 30, 2016 and December 31, 2015 consisted of the following:



	June 30, 2016								December 31, 2015
(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	$	1,442,512	$	(699,252	)	$	743,260	15.0	$	1,398,986	$	(656,799	)	$	742,187	15.0
Non-compete agreements	29,624		(27,532		)	2,092		6.8	29,440		(26,947		)	2,493		6.8
Total	$	1,472,136	$	(726,784	)	$	745,352		$	1,428,426	$	(683,746	)	$	744,680


(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 $86.6 million, $84.6 million, $79.3 million, $74.8 million, and $67.4 million, respectively.

Long-Term Debt

6 Months Ended

Jun. 30, 2016

Debt Disclosure [Abstract]

Long-Term Debt

Long-term debt at June 30, 2016 and December 31, 2015 consisted of the following:



(in thousands)	June 30, 2016			December 31, 2015
Current portion of long-term debt:
Current portion of 5-year term loan facility expires 2019	$	55,000		$	48,125
5.660% senior notes, Series C, semi-annual interest payments, balloon due 2016	25,000			25,000
Short term promissory note	492			—
Total current portion of long-term debt	80,492			73,125
Long-term debt:
Note agreements:
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	498,707			498,628
Total notes	598,707			598,628
Credit agreements:
5-year term-loan facility, periodic interest and principal payments, LIBOR plus up to 1.75%, expires May 20, 2019	453,750			481,250
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%, terminated March 14, 2016	—			—
Total credit agreements	453,750			481,250
Debt issuance costs (contra)	(7,453		)	(8,260		)
Total long-term debt less unamortized discount and debt issuance costs	1,045,004			1,071,618
Current portion of long-term debt	80,492			73,125
Total debt	$	1,125,496		$	1,144,743

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 June 30, 2016, 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. On March 14, 2016, the Wells Fargo Revolver was terminated before its maturity date as mentioned above with no fees incurred. There were no borrowings against the Wells Fargo Revolver as of June 30, 2016 and December 31, 2015.

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 June 30, 2016 and December 31, 2015, there was an outstanding debt balance issued under the provisions of the Credit Facility in total of $508.8 million and $529.4 million respectively, with no borrowings outstanding relative to the revolving loan. Per the terms of the agreement, a scheduled principal payment of $13.8 million is due on September 30, 2016.

On September 18, 2014, the Company issued $500.0 million of 4.200% 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 June 30, 2016 and December 31, 2015, there was an outstanding debt balance of $500.0 million exclusive of the associated discount balance.

The Master 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 June 30, 2016 and December 31, 2015.

The 30-day Adjusted LIBOR Rate as of June 30, 2016 was 0.50%.

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

6 Months Ended

Jun. 30, 2016

Supplemental Cash Flow Elements [Abstract]

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

Our Restricted Cash balance is composed of funds held in separate premium trust accounts as required by state law or, in some cases, pursuant to agreements 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 is a reduction during the second quarter of 2015 of approximately $41 million in the balance reported on our Condensed Consolidated Balance Sheet as Restricted Cash and Investments and a corresponding increase in the balance reported as Cash and Cash Equivalents. While these balances are not restricted, they do represent premium payments from customers to be paid to insurance carriers and this change should not be viewed as a source of operating cash.



	For the six months ended June 30,
(in thousands)	2016		2015
Cash paid during the period for:
Interest	$	18,770	$	18,766
Income taxes	$	71,466	$	67,457

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



	For the six months ended June 30,
(in thousands)	2016		2015
Other payable issued for purchased customer accounts	$	10,500	$	905
Estimated acquisition earn-out payables and related charges	$	2,393	$	27,134
Notes payable issued or assumed for purchased customer accounts	$	492	$	—
Notes received on the sale of fixed assets and customer accounts	$	—	$	544

Legal and Regulatory Proceedings	6 Months Ended
Legal and Regulatory Proceedings	Jun. 30, 2016
Commitments and Contingencies Disclosure [Abstract]
Legal and Regulatory Proceedings	Legal and Regulatory Proceedings The Company is involved in numerous pending or threatened proceedings by or against Brown & Brown, Inc. or one or more of its subsidiaries that arise in the ordinary course of business. The damages that may be claimed against the Company in these various proceedings are in some cases substantial, including in certain instances claims for punitive or extraordinary damages. Some of these claims and lawsuits have been resolved, others are in the process of being resolved and others are still in the investigation or discovery phase. The Company will continue to respond appropriately to these claims and lawsuits and to vigorously protect its interests. 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.

Segment Information

6 Months Ended

Jun. 30, 2016

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 $3.7 million and $3.4 million of total revenues for the three months ended June 30, 2016 and 2015, respectively. These operations earned $6.5 million and $6.1 million of total revenues for the six months ended June 30, 2016 and 2015, respectively. Long-lived assets held outside of the United States as of June 30, 2016 and 2015 were not material.

The accounting policies of the reportable segments are the same as those described in Note 1 of the Company’s Annual Report on Form 10-K for the year ended December 31, 2015. 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, corporate-related items, including the inter-company interest expense charge to the reporting segment, and the elimination of inter-segment activities.



	For the three months ended June 30, 2016
(in thousands)	Retail		National Programs		Wholesale Brokerage		Services		Other			Total
Total revenues	$	234,560	$	108,820	$	61,287	$	41,752	$	99		$	446,518
Investment income	$	7	$	239	$	1	$	83	$	172		$	502
Amortization	$	10,893	$	6,982	$	2,591	$	1,140	$	4		$	21,610
Depreciation	$	1,616	$	2,007	$	488	$	472	$	771		$	5,354
Interest expense	$	9,986	$	11,461	$	685	$	1,327	$	(13,622	)	$	9,837
Income before income taxes	$	49,150	$	22,245	$	16,287	$	6,906	$	14,489		$	109,077
Total assets	$	3,593,733	$	2,556,293	$	1,018,689	$	327,957	$	(2,289,795	)	$	5,206,877
Capital expenditures	$	2,172	$	1,314	$	322	$	276	$	608		$	4,692



	For the three months ended June 30, 2015
(in thousands)	Retail		National Programs		Wholesale Brokerage		Services		Other			Total
Total revenues	$	222,721	$	103,056	$	55,417	$	38,360	$	(107	)	$	419,447
Investment income	$	21	$	56	$	73	$	1	$	109		$	260
Amortization	$	11,185	$	6,975	$	2,432	$	1,022	$	9		$	21,623
Depreciation	$	1,634	$	1,756	$	561	$	529	$	757		$	5,237
Interest expense	$	10,562	$	13,953	$	216	$	1,596	$	(16,656	)	$	9,671
Income before income taxes	$	48,455	$	13,810	$	16,390	$	5,538	$	16,721		$	100,914
Total assets	$	3,423,263	$	2,516,430	$	865,000	$	283,996	$	(2,067,852	)	$	5,020,837
Capital expenditures	$	1,349	$	1,761	$	1,211	$	301	$	248		$	4,870



	For the six months ended June 30, 2016
(in thousands)	Retail		National Programs		Wholesale Brokerage		Services		Other			Total
Total revenues	$	466,748	$	209,890	$	114,701	$	78,320	$	1,032		$	870,691
Investment income	$	28	$	487	$	4	$	147	$	254		$	920
Amortization	$	21,882	$	14,090	$	5,033	$	2,205	$	10		$	43,220
Depreciation	$	3,253	$	3,936	$	984	$	959	$	1,540		$	10,672
Interest expense	$	20,389	$	24,051	$	932	$	2,563	$	(28,201	)	$	19,734
Income before income taxes	$	99,602	$	36,048	$	30,849	$	11,958	$	33,169		$	211,626
Total assets	$	3,593,733	$	2,556,293	$	1,018,689	$	327,957	$	(2,289,795	)	$	5,206,877
Capital expenditures	$	3,221	$	3,246	$	914	$	481	$	1,082		$	8,944



	For the six months ended June 30, 2015
(in thousands)	Retail		National Programs		Wholesale Brokerage		Services		Other			Total
Total revenues	$	441,065	$	202,611	$	107,245	$	73,148	$	(324	)	$	823,745
Investment income	$	43	$	101	$	145	$	1	$	190		$	480
Amortization	$	22,119	$	14,210	$	4,855	$	2,045	$	19		$	43,248
Depreciation	$	3,276	$	3,522	$	1,124	$	1,059	$	1,439		$	10,420
Interest expense	$	20,720	$	28,908	$	445	$	3,195	$	(33,746	)	$	19,522
Income before income taxes	$	95,464	$	23,286	$	30,874	$	10,040	$	35,028		$	194,692
Total assets	$	3,423,263	$	2,516,430	$	865,000	$	283,996	$	(2,067,852	)	$	5,020,837
Capital expenditures	$	2,773	$	3,250	$	1,662	$	541	$	371		$	8,597

Investments

6 Months Ended

Jun. 30, 2016

Investments, Debt and Equity Securities [Abstract]

Investments

At June 30, 2016, 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	$	21,806	$	190	$	—	$	21,996
Corporate debt	3,371		41		—		3,412
Short duration fixed income fund	484		12		—		496
Total	$	25,661	$	243	$	—	$	25,904

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 June 30, 2016:



	Less than 12 Months				12 Months or More				Total
(in thousands)	Fair Value		Unrealized Losses		Fair Value		Unrealized Losses		Fair Value		Unrealized Losses
U.S. Treasury securities, obligations of U.S. Government agencies and Municipals	$	241	$	—	$	—	$	—	$	241	$	—
Corporate debt	382		—		160		—		542		—
Total	$	623	$	—	$	160	$	—	$	783	$	—

The unrealized losses from corporate issuers were caused by interest rate increases. At June 30, 2016, the Company had 5 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 June 30, 2016.

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

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:



	Less than 12 Months					12 Months or More					Total
(in thousands)	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 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, 2015, the Company had 35 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, 2015.

The amortized cost and estimated fair value of the fixed maturity securities at June 30, 2016 by contractual maturity are set forth below:



(in thousands)	Amortized Cost		Fair Value
Years to maturity:
Due in one year or less	$	2,910	$	2,912
Due after one year through five years	22,421		22,638
Due after five years through ten years	330		354
Total	$	25,661	$	25,904

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 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.

At June 30, 2016, including the $2.9 million from above in maturities of less than one year, the Company held a balance of $13.2 million in other short-term investments on the Condensed Consolidated Balance Sheet.

Proceeds from the sales and maturity of the Company’s investment in fixed maturity securities were $4.6 million. This along with maturing time deposits and the utilization of funds from a money-market investment account of $4.8 million yielded total cash proceeds from the sale of investments of $9.4 million in the period of January 1, 2016 to June 30, 2016. These proceeds were used to purchase additional fixed maturity securities. The gains and losses realized on those sales for the period from January 1, 2016 to June 30, 2016 were insignificant.

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

At June 30, 2016, 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

Losses and Loss Adjustment Reserve

6 Months Ended

Jun. 30, 2016

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 are as follows:



	Period from January 1, 2016 to June 30, 2016
(in thousands)	Written		Earned
Direct premiums	$	286,425	$	297,160
Ceded premiums	286,416		297,151
Net premiums	$	9	$	9

All premiums written by Wright Flood under the National Flood Insurance Program are 100% ceded to FEMA, for which Wright Flood received a 30.9% expense allowance from January 1, 2016 through June 30, 2016. For the period from January 1, 2016 through June 30, 2016, the Company ceded $285.7 million of written premiums.

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 $0.7 million for the period from January 1, 2016 through June 30, 2016. No loss data exists on this agreement.

Wright Flood also ceded 100% 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 June 30, 2016, ceded unpaid losses and loss adjustment expenses for Homeowners, Private Passenger Auto Liability and Other Liability Occurrence was $8,698, $8,400 and $0, 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.

As of June 30, 2016 the Condensed Consolidated Balance Sheet contained reinsurance recoverable of $60.8 million and prepaid reinsurance premiums of $298.9 million. There was no net activity in the reserve for losses and loss adjustment expense during the period January 1, 2016 through June 30, 2016, as Wright Flood's direct premiums written were 100% ceded to two reinsurers. The balance of the reserve for losses and loss adjustment expense, excluding related reinsurance recoverable, as of June 30, 2016 was $60.8 million.

Subsidiary Dividend Restrictions	6 Months Ended
Subsidiary Dividend Restrictions	Jun. 30, 2016
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. 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	6 Months Ended
Shareholders' Equity	Jun. 30, 2016
Equity [Abstract]
Shareholders' Equity	Shareholders’ Equity On November 11, 2015, the Company entered into an accelerated share repurchase agreement (“ASR”) with an investment bank to purchase an aggregate $75 million of the Company’s common stock. The Company received an initial delivery of 1,985,981shares 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. 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 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 million of the Company’s outstanding common stock. After completion of the ASR on January 6, 2016, the Company has approval to repurchase up to $375 million, in the aggregate, of the Company’s outstanding common stock. Since beginning share repurchases in 2014, the Company has repurchased 7,793,579 shares of the Company's common stock at an aggregate cost of $250 million. 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 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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
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Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 4: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
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-Paragraph 1
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Reference 6: http://www.xbrl.org/2003/role/presentationRef
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-Topic 210
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Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 8: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 14: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Preferred Stock
-URI http://asc.fasb.org/extlink&oid=6521494

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-Name Accounting Standards Codification
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+ Details

Nature of Operations (Policies)	6 Months Ended
Nature of Operations (Policies)	Jun. 30, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Nature of Operations	four
Basis of Accounting	The accompanying unaudited Condensed Consolidated Financial Statements have been prepared in accordance with U.S. GAAP for interim financial information and with the instructions for Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by U.S. GAAP for complete financial statements. In the opinion of management, all adjustments (consisting of normal recurring accruals) considered necessary for a fair presentation have been included. These unaudited Condensed Consolidated Financial Statements should be read in conjunction with the audited Consolidated Financial Statements and the notes thereto set forth in the Company’s Annual Report on Form 10-K for the year ended December 31, 2015.
Recently Issued Accounting Pronouncements	Recently Issued Accounting Pronouncements

Net Income Per Share (Tables)

6 Months Ended

Jun. 30, 2016

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 three months ended June 30,						For the six months ended June 30,
(in thousands, except per share data)	2016			2015			2016			2015
Net income	$	66,250		$	61,005		$	128,320		$	117,956
Net income attributable to unvested awarded performance stock	(1,896		)	(1,439		)	(3,337		)	(2,802		)
Net income attributable to common shares	$	64,354		$	59,566		$	124,983		$	115,154
Weighted average number of common shares outstanding – basic	139,998			140,839			139,395			141,803
Less unvested awarded performance stock included in weighted average number of common shares outstanding – basic	(4,006		)	(3,321		)	(3,625		)	(3,369		)
Weighted average number of common shares outstanding for basic earnings per common share	135,992			137,518			135,770			138,434
Dilutive effect of stock options	1,589			2,310			1,490			2,213
Weighted average number of shares outstanding – diluted	137,581			139,828			137,260			140,647
Net income per share:
Basic	$	0.47		$	0.43		$	0.92		$	0.83
Diluted	$	0.47		$	0.43		$	0.91		$	0.82

Business Combinations (Tables)

6 Months Ended

Jun. 30, 2016

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		Note Payable		Other Payable		Recorded Earn-Out Payable			Net Assets Acquired		Maximum Potential Earn- Out Payable
Social Security Advocates for the Disabled (SSAD)	Services	February 1, 2016	$	32,526	$	492	$	—	$	971		$	33,989	$	3,000
Morstan General Agency, Inc. (Morstan)	Wholesale	June 1, 2016	66,050		—		10,200		1,885			78,135		5,000
Other	Various	Various	10,808		—		300		(463		)	10,645		3,864
Total			$	109,384	$	492	$	10,500	$	2,393		$	122,769	$	11,864

Estimated fair values of aggregate assets and liabilities acquired

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



(in thousands)	SSAD			Morstan			Other			Total
Cash	$	2,094		$	—		$	—		$	2,094
Other current assets	1,042			2,482			753			4,277
Fixed assets	307			300			42			649
Goodwill	22,321			49,954			6,389			78,664
Purchased customer accounts	13,069			26,775			4,291			44,135
Non-compete agreements	72			39			73			184
Total assets acquired	38,905			79,550			11,548			130,003
Other current liabilities	(1,686		)	(1,415		)	(903		)	(4,004		)
Deferred income tax, net	(3,230		)	—			—			(3,230		)
Total liabilities assumed	(4,916		)	(1,415		)	(903		)	(7,234		)
Net assets acquired	$	33,989		$	78,135		$	10,645		$	122,769

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 three months ended June 30,				For the six months ended June 30,
(in thousands, except per share data)	2016		2015		2016		2015
Total revenues	$	452,240	$	432,324	$	885,956	$	848,183
Income before income taxes	$	110,064	$	103,442	$	214,403	$	199,568
Net income	$	66,849	$	62,533	$	130,004	$	120,910
Net income per share:
Basic	$	0.48	$	0.44	$	0.93	$	0.85
Diluted	$	0.47	$	0.44	$	0.92	$	0.84
Weighted average number of shares outstanding:
Basic	135,992		137,518		135,770		138,434
Diluted	137,581		139,828		137,260		140,647

Additions, payments, and net changes, as well as interest expense accretion on estimated acquisition earn-out payables

The resulting additions, payments, and net changes, as well as the interest expense accretion on the estimated acquisition earn-out payables, for the three and six months ended June 30, 2016 and 2015, were as follows:



	For the three months ended June 30,						For the six months ended June 30,
(in thousands)	2016			2015			2016			2015
Balance as of the beginning of the period	$	69,095		$	77,709		$	78,387		$	75,283
Additions to estimated acquisition earn-out payables	1,787			21,480			2,393			27,134
Payments for estimated acquisition earn-out payables	(1,485		)	(9,448		)	(10,562		)	(14,039		)
Subtotal	69,397			89,741			70,218			88,378
Net change in earnings from estimated acquisition earn-out payables:
Change in fair value on estimated acquisition earn-out payables	3,385			(342		)	1,822			334
Interest expense accretion	672			714			1,414			1,401
Net change in earnings from estimated acquisition earn-out payables	4,057			372			3,236			1,735
Balance as of June 30,	$	73,454		$	90,113		$	73,454		$	90,113

Goodwill (Tables)

6 Months Ended

Jun. 30, 2016

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 six months ended June 30, 2016 are as follows:



(in thousands)	Retail		National Programs			Wholesale Brokerage		Services		Total
Balance as of January 1, 2016	$	1,345,636	$	901,866		$	226,961	$	112,220	$	2,586,683
Goodwill of acquired businesses	6,366		(1		)	49,978		22,321		78,664
Goodwill of transferred businesses	571		(571		)	—		—		—
Balance as of June 30, 2016	$	1,352,573	$	901,294		$	276,939	$	134,541	$	2,665,347

Amortizable Intangible Assets (Tables)

6 Months Ended

Jun. 30, 2016

Goodwill and Intangible Assets Disclosure [Abstract]

Amortizable Intangible Assets

Amortizable intangible assets at June 30, 2016 and December 31, 2015 consisted of the following:



	June 30, 2016								December 31, 2015
(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	$	1,442,512	$	(699,252	)	$	743,260	15.0	$	1,398,986	$	(656,799	)	$	742,187	15.0
Non-compete agreements	29,624		(27,532		)	2,092		6.8	29,440		(26,947		)	2,493		6.8
Total	$	1,472,136	$	(726,784	)	$	745,352		$	1,428,426	$	(683,746	)	$	744,680


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

Long-Term Debt (Tables)

6 Months Ended

Jun. 30, 2016

Debt Disclosure [Abstract]

Long-Term Debt Instrument

Long-term debt at June 30, 2016 and December 31, 2015 consisted of the following:



(in thousands)	June 30, 2016			December 31, 2015
Current portion of long-term debt:
Current portion of 5-year term loan facility expires 2019	$	55,000		$	48,125
5.660% senior notes, Series C, semi-annual interest payments, balloon due 2016	25,000			25,000
Short term promissory note	492			—
Total current portion of long-term debt	80,492			73,125
Long-term debt:
Note agreements:
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	498,707			498,628
Total notes	598,707			598,628
Credit agreements:
5-year term-loan facility, periodic interest and principal payments, LIBOR plus up to 1.75%, expires May 20, 2019	453,750			481,250
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%, terminated March 14, 2016	—			—
Total credit agreements	453,750			481,250
Debt issuance costs (contra)	(7,453		)	(8,260		)
Total long-term debt less unamortized discount and debt issuance costs	1,045,004			1,071,618
Current portion of long-term debt	80,492			73,125
Total debt	$	1,125,496		$	1,144,743

- 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
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+ Details

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

6 Months Ended

Jun. 30, 2016

Supplemental Cash Flow Elements [Abstract]

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



	For the six months ended June 30,
(in thousands)	2016		2015
Cash paid during the period for:
Interest	$	18,770	$	18,766
Income taxes	$	71,466	$	67,457

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



	For the six months ended June 30,
(in thousands)	2016		2015
Other payable issued for purchased customer accounts	$	10,500	$	905
Estimated acquisition earn-out payables and related charges	$	2,393	$	27,134
Notes payable issued or assumed for purchased customer accounts	$	492	$	—
Notes received on the sale of fixed assets and customer accounts	$	—	$	544

Segment Information (Tables)

6 Months Ended

Jun. 30, 2016

Segment Reporting Information [Line Items]

Segment Information



	For the three months ended June 30, 2016
(in thousands)	Retail		National Programs		Wholesale Brokerage		Services		Other			Total
Total revenues	$	234,560	$	108,820	$	61,287	$	41,752	$	99		$	446,518
Investment income	$	7	$	239	$	1	$	83	$	172		$	502
Amortization	$	10,893	$	6,982	$	2,591	$	1,140	$	4		$	21,610
Depreciation	$	1,616	$	2,007	$	488	$	472	$	771		$	5,354
Interest expense	$	9,986	$	11,461	$	685	$	1,327	$	(13,622	)	$	9,837
Income before income taxes	$	49,150	$	22,245	$	16,287	$	6,906	$	14,489		$	109,077
Total assets	$	3,593,733	$	2,556,293	$	1,018,689	$	327,957	$	(2,289,795	)	$	5,206,877
Capital expenditures	$	2,172	$	1,314	$	322	$	276	$	608		$	4,692



	For the three months ended June 30, 2015
(in thousands)	Retail		National Programs		Wholesale Brokerage		Services		Other			Total
Total revenues	$	222,721	$	103,056	$	55,417	$	38,360	$	(107	)	$	419,447
Investment income	$	21	$	56	$	73	$	1	$	109		$	260
Amortization	$	11,185	$	6,975	$	2,432	$	1,022	$	9		$	21,623
Depreciation	$	1,634	$	1,756	$	561	$	529	$	757		$	5,237
Interest expense	$	10,562	$	13,953	$	216	$	1,596	$	(16,656	)	$	9,671
Income before income taxes	$	48,455	$	13,810	$	16,390	$	5,538	$	16,721		$	100,914
Total assets	$	3,423,263	$	2,516,430	$	865,000	$	283,996	$	(2,067,852	)	$	5,020,837
Capital expenditures	$	1,349	$	1,761	$	1,211	$	301	$	248		$	4,870



	For the six months ended June 30, 2016
(in thousands)	Retail		National Programs		Wholesale Brokerage		Services		Other			Total
Total revenues	$	466,748	$	209,890	$	114,701	$	78,320	$	1,032		$	870,691
Investment income	$	28	$	487	$	4	$	147	$	254		$	920
Amortization	$	21,882	$	14,090	$	5,033	$	2,205	$	10		$	43,220
Depreciation	$	3,253	$	3,936	$	984	$	959	$	1,540		$	10,672
Interest expense	$	20,389	$	24,051	$	932	$	2,563	$	(28,201	)	$	19,734
Income before income taxes	$	99,602	$	36,048	$	30,849	$	11,958	$	33,169		$	211,626
Total assets	$	3,593,733	$	2,556,293	$	1,018,689	$	327,957	$	(2,289,795	)	$	5,206,877
Capital expenditures	$	3,221	$	3,246	$	914	$	481	$	1,082		$	8,944



	For the six months ended June 30, 2015
(in thousands)	Retail		National Programs		Wholesale Brokerage		Services		Other			Total
Total revenues	$	441,065	$	202,611	$	107,245	$	73,148	$	(324	)	$	823,745
Investment income	$	43	$	101	$	145	$	1	$	190		$	480
Amortization	$	22,119	$	14,210	$	4,855	$	2,045	$	19		$	43,248
Depreciation	$	3,276	$	3,522	$	1,124	$	1,059	$	1,439		$	10,420
Interest expense	$	20,720	$	28,908	$	445	$	3,195	$	(33,746	)	$	19,522
Income before income taxes	$	95,464	$	23,286	$	30,874	$	10,040	$	35,028		$	194,692
Total assets	$	3,423,263	$	2,516,430	$	865,000	$	283,996	$	(2,067,852	)	$	5,020,837
Capital expenditures	$	2,773	$	3,250	$	1,662	$	541	$	371		$	8,597

Investments (Tables)

6 Months Ended

Jun. 30, 2016

Schedule of Held-to-maturity Securities [Line Items]

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 June 30, 2016, 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	$	21,806	$	190	$	—	$	21,996
Corporate debt	3,371		41		—		3,412
Short duration fixed income fund	484		12		—		496
Total	$	25,661	$	243	$	—	$	25,904

Summary of Unrealized Loss Position



	Less than 12 Months					12 Months or More					Total
(in thousands)	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	)

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 June 30, 2016:



	Less than 12 Months				12 Months or More				Total
(in thousands)	Fair Value		Unrealized Losses		Fair Value		Unrealized Losses		Fair Value		Unrealized Losses
U.S. Treasury securities, obligations of U.S. Government agencies and Municipals	$	241	$	—	$	—	$	—	$	241	$	—
Corporate debt	382		—		160		—		542		—
Total	$	623	$	—	$	160	$	—	$	783	$	—

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 June 30, 2016 by contractual maturity are set forth below:



(in thousands)	Amortized Cost		Fair Value
Years to maturity:
Due in one year or less	$	2,910	$	2,912
Due after one year through five years	22,421		22,638
Due after five years through ten years	330		354
Total	$	25,661	$	25,904

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

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		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Earnings Per Share [Abstract]
Net income	$ 66,250	$ 61,005	$ 128,320	$ 117,956
Net income attributable to unvested awarded performance stock	(1,896)	(1,439)	(3,337)	(2,802)
Net income attributable to common shares	$ 64,354	$ 59,566	$ 124,983	$ 115,154
Weighted average number of common shares outstanding - basic (in shares)	139,998	140,839	139,395	141,803
Less unvested awarded performance stock included in weighted average number of common shares outstanding - basic (in shares)	(4,006)	(3,321)	(3,625)	(3,369)
Weighted average number of common shares outstanding for basic earnings per common share (in shares)	135,992	137,518	135,770	138,434
Dilutive effect of stock options (in shares)	1,589	2,310	1,490	2,213
Weighted average number of shares outstanding - diluted (in shares)	137,581	139,828	137,260	140,647
Basic (in dollars per share)	$ 0.47	$ 0.43	$ 0.92	$ 0.83
Diluted (in dollars per share)	$ 0.47	$ 0.43	$ 0.91	$ 0.82

Business Combinations - Additional Information (Detail)	6 Months Ended
Business Combinations - Additional Information (Detail)	Jun. 30, 2016 USD ($) acquisition customer_account	Jun. 30, 2015 USD ($) acquisition	Apr. 01, 2016 USD ($)	Jan. 01, 2016 USD ($)	Apr. 01, 2015 USD ($)	Jan. 01, 2015 USD ($)
Business Acquisition [Line Items]
Number of acquisitions \| acquisition	5	7
Aggregate purchase price of acquisitions	$ 917,497
Payments to Acquire Businesses, Gross	109,384,000	$ 105,100,000
Goodwill assigned	78,664,000
Goodwill currently deductible for income tax purposes	54,920,000
Goodwill currently non-deductible for income tax purposes	21,351,000
Goodwill related to the recorded earn-out payables	2,393,000
Total revenues related to acquisitions	8,870,000
Income before income taxes related to acquisitions	1,400,000
Estimated acquisition earn-out payables	73,454,000	$ 90,113,000	$ 69,095,000	$ 78,387,000	$ 77,709,000	$ 75,283,000
Accounts payable
Business Acquisition [Line Items]
Estimated acquisition earn-out payables	$ 38,700,000
Purchased customer accounts
Business Acquisition [Line Items]
Weighted average life (years)	15 years
Non-compete agreements
Business Acquisition [Line Items]
Weighted average life (years)	5 years
Services
Business Acquisition [Line Items]
Goodwill assigned	$ 6,366,000
National Programs
Business Acquisition [Line Items]
Goodwill assigned	(1,000)
Wholesale Brokerage
Business Acquisition [Line Items]
Goodwill assigned	49,978,000
Services [Member]
Business Acquisition [Line Items]
Goodwill assigned	22,321,000
Other non-current liability
Business Acquisition [Line Items]
Estimated acquisition earn-out payables	$ 34,800,000
Business Combinations - Asset Deals [Member]
Business Acquisition [Line Items]
Number of acquisitions \| acquisition	4
Business Combinations - Stock Deals [Member]
Business Acquisition [Line Items]
Number of acquisitions \| customer_account	1

Business Combinations - Acquisitions Accounted for Business Combinations (Detail) - USD ($)	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Business Combination, Separately Recognized Transactions [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities	$ 7,234,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets	130,003,000
Business Acquisitions Purchase Price Allocation Current Assets Cash And Cash Equivalents	2,094,000
Cash Paid	109,384,000	$ 105,100,000
Business Acquisition Cost of Entity Note Payable	492,000
Other Payable	10,500,000
Recorded Earn-Out Payable	2,393,000
Net Assets Acquired	122,769,000
Maximum Potential Earn- Out Payable	11,864,000
Other current assets	4,277,000
Fixed assets	649,000
Goodwill	78,664,000
Purchased customer accounts	44,135,000
Non-compete agreements	184,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Other	4,004,000
Deferred Tax Liabilities, Net	3,230,000
Services [Member]
Business Combination, Separately Recognized Transactions [Line Items]
Goodwill	22,321,000
Services
Business Combination, Separately Recognized Transactions [Line Items]
Goodwill	6,366,000
National Programs
Business Combination, Separately Recognized Transactions [Line Items]
Goodwill	(1,000)
Wholesale Brokerage
Business Combination, Separately Recognized Transactions [Line Items]
Goodwill	49,978,000
SSAD [Member]
Business Combination, Separately Recognized Transactions [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities	4,916,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets	38,905,000
Business Acquisitions Purchase Price Allocation Current Assets Cash And Cash Equivalents	2,094,000
Net Assets Acquired	33,989,000
Other current assets	1,042,000
Fixed assets	307,000
Goodwill	22,321,000
Purchased customer accounts	13,069,000
Non-compete agreements	72,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Other	1,686,000
Deferred Tax Liabilities, Net	$ 3,230,000
SSAD [Member] \| Services [Member]
Business Combination, Separately Recognized Transactions [Line Items]
Effective Date of Acquisition	Feb. 01, 2016
Cash Paid	$ 32,526,000
Business Acquisition Cost of Entity Note Payable	492,000
Other Payable	0
Recorded Earn-Out Payable	971,000
Net Assets Acquired	33,989,000
Maximum Potential Earn- Out Payable	3,000,000
Other Acquisitions [Member]
Business Combination, Separately Recognized Transactions [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities	903,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets	11,548,000
Business Acquisitions Purchase Price Allocation Current Assets Cash And Cash Equivalents	0
Net Assets Acquired	10,645,000
Other current assets	753,000
Fixed assets	42,000
Goodwill	6,389,000
Purchased customer accounts	4,291,000
Non-compete agreements	73,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Other	903,000
Deferred Tax Liabilities, Net	0
Other Acquisitions [Member] \| Various
Business Combination, Separately Recognized Transactions [Line Items]
Cash Paid	10,808,000
Business Acquisition Cost of Entity Note Payable	0
Other Payable	300,000
Recorded Earn-Out Payable	(463,000)
Net Assets Acquired	10,645,000
Maximum Potential Earn- Out Payable	3,864,000
Morstan General Agency, Inc. [Member]
Business Combination, Separately Recognized Transactions [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities	1,415,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets	79,550,000
Net Assets Acquired	78,135,000
Other current assets	2,482,000
Fixed assets	300,000
Goodwill	49,954,000
Purchased customer accounts	26,775,000
Non-compete agreements	39,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Other	1,415,000
Deferred Tax Liabilities, Net	$ 0
Morstan General Agency, Inc. [Member] \| Services
Business Combination, Separately Recognized Transactions [Line Items]
Effective Date of Acquisition	Jun. 01, 2016
Cash Paid	$ 66,050,000
Business Acquisition Cost of Entity Note Payable	0
Other Payable	10,200,000
Recorded Earn-Out Payable	1,885,000
Net Assets Acquired	78,135,000
Maximum Potential Earn- Out Payable	$ 5,000,000

Business Combinations - Estimated Fair Values of Aggregate Assets and Liabilities Acquired (Detail) - USD ($)	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Fair Value Of Assets And Liabilities Statement [Line Items]
Business Acquisitions Purchase Price Allocation Current Assets Cash And Cash Equivalents	$ 2,094,000
Payments to Acquire Businesses, Gross	109,384,000	$ 105,100,000
Recorded Earn-Out Payable	2,393,000
Other current assets	4,277,000
Fixed assets	649,000
Goodwill	78,664,000
Purchased customer accounts	44,135,000
Non-compete agreements	184,000
Total assets acquired	130,003,000
Other current liabilities	(4,004,000)
Deferred Tax Liabilities, Net	(3,230,000)
Total liabilities assumed	(7,234,000)
Net assets acquired	122,769,000
Maximum Potential Earn- Out Payable	11,864,000
SSAD [Member]
Fair Value Of Assets And Liabilities Statement [Line Items]
Business Acquisitions Purchase Price Allocation Current Assets Cash And Cash Equivalents	2,094,000
Other current assets	1,042,000
Fixed assets	307,000
Goodwill	22,321,000
Purchased customer accounts	13,069,000
Non-compete agreements	72,000
Total assets acquired	38,905,000
Other current liabilities	(1,686,000)
Deferred Tax Liabilities, Net	(3,230,000)
Total liabilities assumed	(4,916,000)
Net assets acquired	33,989,000
Morstan General Agency, Inc. [Member]
Fair Value Of Assets And Liabilities Statement [Line Items]
Other current assets	2,482,000
Fixed assets	300,000
Goodwill	49,954,000
Purchased customer accounts	26,775,000
Non-compete agreements	39,000
Total assets acquired	79,550,000
Other current liabilities	(1,415,000)
Deferred Tax Liabilities, Net	0
Total liabilities assumed	(1,415,000)
Net assets acquired	78,135,000
Other Acquisitions [Member]
Fair Value Of Assets And Liabilities Statement [Line Items]
Business Acquisitions Purchase Price Allocation Current Assets Cash And Cash Equivalents	0
Other current assets	753,000
Fixed assets	42,000
Goodwill	6,389,000
Purchased customer accounts	4,291,000
Non-compete agreements	73,000
Total assets acquired	11,548,000
Other current liabilities	(903,000)
Deferred Tax Liabilities, Net	0
Total liabilities assumed	(903,000)
Net assets acquired	10,645,000
Wholesale Brokerage
Fair Value Of Assets And Liabilities Statement [Line Items]
Goodwill	$ 49,978,000

Business Combinations - Results of Operations (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual			$ 8,870
Business Combination Pro Forma Information Income Loss Before Income Taxes Of Acquiree Since Acquisition Date Actual			1,400
Total revenues	$ 452,240	$ 432,324	885,956	$ 848,183
Income before income taxes	110,064	103,442	214,403	199,568
Net income	$ 66,849	$ 62,533	$ 130,004	$ 120,910
Net income per share:
Basic (in dollars per share)	$ 0.48	$ 0.44	$ 0.93	$ 0.85
Diluted (in dollars per share)	$ 0.47	$ 0.44	$ 0.92	$ 0.84
Weighted Average Basic Shares Outstanding, Pro Forma	135,992	137,518	135,770	138,434
Weighted average number of shares outstanding:
Pro Forma Weighted Average Shares Outstanding, Diluted	137,581	139,828	137,260	140,647

Business Combinations - Additions, Payments, and Net Changes, as well as Interest Expense Accretion on Estimated Acquisition Earn-Out Payables (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Business Combinations [Abstract]
Additions to estimated acquisition earn-out payables	$ 1,787	$ 21,480	$ 2,393	$ 27,134
Payments for estimated acquisition earn-out payables	(1,485)	(9,448)	(10,562)	(14,039)
Subtotal	69,397	89,741	70,218	88,378
Net change in earnings from estimated acquisition earn-out payables:
Change in fair value on estimated acquisition earn-out payables	3,385	(342)	1,822	334
Interest expense accretion	672	714	1,414	1,401
Net change in earnings from estimated acquisition earn-out payables	4,057	372	3,236	1,735
Ending balance	$ 73,454	$ 90,113	$ 73,454	$ 90,113

Goodwill - Changes in Carrying Value of Goodwill by Operating Segment (Detail) $ in Thousands	6 Months Ended
	Jun. 30, 2016 USD ($)
Goodwill [Roll Forward]
Beginning balance	$ 2,586,683
Goodwill of acquired businesses	78,664
Goodwill, Transfers	0
Ending balance	2,665,347
Services
Goodwill [Roll Forward]
Beginning balance	1,345,636
Goodwill of acquired businesses	6,366
Goodwill, Transfers	571
Ending balance	1,352,573
National Programs
Goodwill [Roll Forward]
Beginning balance	901,866
Goodwill of acquired businesses	(1)
Goodwill, Transfers	(571)
Ending balance	901,294
Wholesale Brokerage
Goodwill [Roll Forward]
Beginning balance	226,961
Goodwill of acquired businesses	49,978
Goodwill, Transfers	0
Ending balance	276,939
Services
Goodwill [Roll Forward]
Beginning balance	112,220
Goodwill of acquired businesses	22,321
Goodwill, Transfers	0
Ending balance	$ 134,541

Amortizable Intangible Assets - Amortizable Intangible Assets (Detail) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	$ 1,472,136		$ 1,428,426
Accumulated Amortization	(726,784)		(683,746)
Net Carrying Value	745,352		744,680
Purchased customer accounts
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	1,442,512		1,398,986
Accumulated Amortization	(699,252)		(656,799)
Net Carrying Value	$ 743,260		742,187
Weighted Average Life (Years)	15 years	15 years
Non-compete agreements
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	$ 29,624		29,440
Accumulated Amortization	(27,532)		(26,947)
Net Carrying Value	$ 2,092		$ 2,493
Weighted Average Life (Years)	6 years 9 months 18 days	6 years 9 months 18 days

Amortizable Intangible Assets - Additional Information (Detail) $ in Millions	Jun. 30, 2016 USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization expense estimated, year one (2015)	$ 86.6
Amortization expense estimated, year two (2016)	84.6
Amortization expense estimated, year three (2017)	79.3
Amortization expense estimated, year four (2018)	74.8
Amortization expense estimated, year five (2019)	$ 67.4

Long-Term Debt - Long-Term Debt Instrument (Detail) - USD ($)	Jun. 30, 2016	Dec. 31, 2015	Jan. 15, 2015	Apr. 16, 2014
Debt Instrument [Line Items]
Total current portion of long-term debt	$ 80,492,000	$ 73,125,000
Total notes	598,707,000	598,628,000
Long-term credit agreements	453,750,000	481,250,000		$ 25,000,000.0
Debt Issuance Costs, Gross	(7,453,000)	(8,260,000)
Total long-term debt	1,045,004,000	1,071,618,000
Current portion of long-term debt	80,492,000	73,125,000
Total debt	1,125,496,000	1,144,743,000
Notes Payable, Current	492,000	0
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	25,000,000	$ 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	498,707,000	498,628,000
5-year term-loan facility, periodic interest and principal payments, LIBOR plus up to 1.75%, expires May 20, 2019
Debt Instrument [Line Items]
Current portion of loan facility	55,000,000	48,125,000
Long-term credit agreements	453,750,000	$ 481,250,000
Revolving Credit Loan Expires In Two Thousand Sixteen [Member]
Debt Instrument [Line Items]
Long-term credit agreements	$ 0

Long-Term Debt - Long-Term Debt Instrument (Additional Information) (Detail) - USD ($)	6 Months Ended	12 Months Ended
	Jun. 30, 2016	Dec. 31, 2015	Sep. 18, 2014	May 20, 2014	Apr. 16, 2014	Apr. 15, 2014	Jul. 01, 2013
Debt Instrument [Line Items]
Long-term Line of Credit	$ 453,750,000	$ 481,250,000			$ 25,000,000.0
Credit Agreement [Member]
Debt Instrument [Line Items]
Long-term Line of Credit	$ 508,800,000	$ 529,400,000
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
Five Year Term Loan Facility Expires In Two Thousand Twenty-Two [Member]
Debt Instrument [Line Items]
Long-term Line of Credit	$ 453,750,000	$ 481,250,000
Line of credit facility, expiration period	5 years	5 years
Line of credit facility, expiration date	May 20, 2019	May 20, 2019
Five Year Term Loan Facility Expires In Two Thousand Twenty-Two [Member] \| LIBOR
Debt Instrument [Line Items]
Debt instrument, variable interest rate	1.75%	1.75%
Five Year Term Loan Facility Expires In Two Thousand Ninteen Current [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage	0.20%	0.20%
Debt instrument maturity year	2019	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
Debt Instrument [Line Items]
Long-term Line of Credit	$ 0	$ 0
Line of credit facility, expiration period	5 years	5 years
Line of credit facility, commitment fee percentage	0.25%	0.25%
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	1.50%	1.50%
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 Line of Credit	$ 0
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%
Wells Fargo [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Remaining Borrowing Capacity	$ 800,000,000	$ 800,000,000
Beecher [Member] \| Wells Fargo [Member]
Debt Instrument [Line Items]
Long-term Line of Credit						$ 50,000,000.0	$ 50,000,000.0
Uncommitted Facility [Member] \| New Master Agreement [Member]
Debt Instrument [Line Items]
Long-term Line of Credit		$ 0
Term Loan [Member]
Debt Instrument [Line Items]
Long-term Line of Credit				$ 550,000,000.0
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Long-term Line of Credit			$ 475,000,000	$ 375,000,000
Revolving Credit Facility [Member] \| Maximum \| LIBOR
Debt Instrument [Line Items]
Debt instrument, variable interest rate	1.50%

Long-Term Debt - Narrative (Detail)			6 Months Ended		12 Months Ended
Long-Term Debt - Narrative (Detail)	Sep. 18, 2014 USD ($)	May 20, 2014 extension	Jun. 30, 2016 USD ($)	Jun. 30, 2015 USD ($)	Dec. 31, 2015 USD ($)	Jan. 15, 2015 USD ($)	Apr. 17, 2014 USD ($)	Sep. 15, 2011 USD ($)	Feb. 01, 2008 USD ($)	Dec. 22, 2006 USD ($)
Debt Instrument [Line Items]
Revolving and term loan			$ 50,000,000.0
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
Outstanding debt balance			$ 1,125,496,000		$ 1,144,743,000
Five Year Term Loan Facility Expires In Two Thousand Twenty-Two [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Expiration Date			May 20, 2019		May 20, 2019
Line of Credit Facility, Expiration Period			5 years		5 years
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		$ 25,000,000	$ 25,000,000
Credit Agreement
Debt Instrument [Line Items]
Number of extension periods \| extension		2
Extension period		1 year
Unsecured revolving credit facility							$ 1,350,000,000.0
First principal payment			13,800,000
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
Five Year Revolving Loan Facility Expires In Two Thousand Twenty-Two [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Expiration Date			May 20, 2019		May 20, 2019
Letter of credit fees			0.25%		0.25%
Line of Credit Facility, Expiration Period			5 years		5 years
Wells Fargo Revolver
Debt Instrument [Line Items]
Debt instrument, maturity date			Dec. 31, 2016
Potential increased in line of credit facility			$ 75,000,000.0
Borrowings outstanding			$ 0
Line of Credit \| Wells Fargo Revolver
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%
Revolving Credit Facility
Debt Instrument [Line Items]
Proceeds from lines of credit			$ 0	$ 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 [Member]
Debt Instrument [Line Items]
Unsecured senior notes outstanding			$ 1,125,496,000		$ 1,144,743,000
LIBOR
Debt Instrument [Line Items]
30-day Adjusted LIBOR Rate			0.50%
LIBOR \| Five Year Term Loan Facility Expires In Two Thousand Twenty-Two [Member]
Debt Instrument [Line Items]
Debt instrument, variable interest rate			1.75%		1.75%
LIBOR \| Five Year Revolving Loan Facility Expires In Two Thousand Twenty-Two [Member]
Debt Instrument [Line Items]
Debt instrument, variable interest rate			1.50%		1.50%
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 Revolver
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 Revolver
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%

Supplemental Disclosures of Cash Flow Information and Non-Cash Financing and Investing Activities - Significant Non-Cash Investing and Financing Activities (Detail) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Cash paid during the period for:
Interest	$ 18,770	$ 18,766
Income taxes	71,466	67,457
Significant non-cash investing and financing activities
Other payable issued for purchased customer accounts	10,500	905
Estimated acquisition earn-out payables and related charges	2,393	27,134
Business Acquisition Cost of Entity Note Payable	492	0
Notes received on the sale of fixed assets and customer accounts	$ 0	$ 544

Segment Information - Additional Information (Detail) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016 USD ($)	Jun. 30, 2015 USD ($)	Jun. 30, 2016 USD ($) Segment	Jun. 30, 2015 USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments \| Segment			4
Total revenues	$ 446,518	$ 419,447	$ 870,691	$ 823,745
London, Bermuda and Cayman Islands
Segment Reporting Information [Line Items]
Total revenues	$ 3,700	$ 3,400

Segment Information - Summarized Financial Information Reportable Segments (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Segment Reporting Information [Line Items]
Total revenues	$ 446,518	$ 419,447	$ 870,691	$ 823,745
Investment income	502	260	920	480
Amortization	21,610	21,623	43,220	43,248
Depreciation	5,354	5,237	10,672	10,420
Interest expense	9,837	9,671	19,734	19,522
Income before income taxes	109,077	100,914	211,626	194,692
Total assets	5,206,877	5,020,837	5,206,877	5,020,837	$ 5,004,479
Capital expenditures	4,692	4,870	8,944	8,597
Operating Segments \| Services
Segment Reporting Information [Line Items]
Total revenues	234,560	222,721	466,748	441,065
Investment income	7	21	28	43
Amortization	10,893	11,185	21,882	22,119
Depreciation	1,616	1,634	3,253	3,276
Interest expense	9,986	10,562	20,389	20,720
Income before income taxes	49,150	48,455	99,602	95,464
Total assets	3,593,733	3,423,263	3,593,733	3,423,263
Capital expenditures	2,172	1,349	3,221	2,773
Operating Segments \| National Programs
Segment Reporting Information [Line Items]
Total revenues	108,820	103,056	209,890	202,611
Investment income	239	56	487	101
Amortization	6,982	6,975	14,090	14,210
Depreciation	2,007	1,756	3,936	3,522
Interest expense	11,461	13,953	24,051	28,908
Income before income taxes	22,245	13,810	36,048	23,286
Total assets	2,556,293	2,516,430	2,556,293	2,516,430
Capital expenditures	1,314	1,761	3,246	3,250
Operating Segments \| Wholesale Brokerage
Segment Reporting Information [Line Items]
Total revenues	61,287	55,417	114,701	107,245
Investment income	1	73	4	145
Amortization	2,591	2,432	5,033	4,855
Depreciation	488	561	984	1,124
Interest expense	685	216	932	445
Income before income taxes	16,287	16,390	30,849	30,874
Total assets	1,018,689	865,000	1,018,689	865,000
Capital expenditures	322	1,211	914	1,662
Operating Segments \| Services
Segment Reporting Information [Line Items]
Total revenues	41,752	38,360	78,320	73,148
Investment income	83	1	147	1
Amortization	1,140	1,022	2,205	2,045
Depreciation	472	529	959	1,059
Interest expense	1,327	1,596	2,563	3,195
Income before income taxes	6,906	5,538	11,958	10,040
Total assets	327,957	283,996	327,957	283,996
Capital expenditures	276	301	481	541
Other
Segment Reporting Information [Line Items]
Total revenues	99	(107)	1,032	(324)
Investment income	172	109	254	190
Amortization	4	9	10	19
Depreciation	771	757	1,540	1,439
Interest expense	(13,622)	(16,656)	(28,201)	(33,746)
Income before income taxes	14,489	16,721	33,169	35,028
Total assets	(2,289,795)	(2,067,852)	(2,289,795)	(2,067,852)
Capital expenditures	$ 608	$ 248	$ 1,082	$ 371

Investments - Schedule of Investments in Fixed Maturity Securities (Detail) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Schedule of Available-for-sale Securities [Line Items]
Cost	$ 25,661	$ 18,094
Gross Unrealized Gains	243	40
Gross Unrealized Losses	0	(42)
Fair Value	25,904	18,092
U.S. Treasury securities, obligations of U.S. Government agencies and Municipals
Schedule of Available-for-sale Securities [Line Items]
Cost	21,806	11,876
Gross Unrealized Gains	190	6
Gross Unrealized Losses	0	(26)
Fair Value	21,996	11,856
Foreign government
Schedule of Available-for-sale Securities [Line Items]
Cost		50
Gross Unrealized Gains		0
Gross Unrealized Losses		0
Fair Value		50
Corporate debt
Schedule of Available-for-sale Securities [Line Items]
Cost	3,371	4,505
Gross Unrealized Gains	41	7
Gross Unrealized Losses	0	(16)
Fair Value	3,412	4,496
Short duration fixed income fund
Schedule of Available-for-sale Securities [Line Items]
Cost	484	1,663
Gross Unrealized Gains	12	27
Gross Unrealized Losses	0
Fair Value	$ 496	$ 1,690

Investments - Summary of Unrealized Loss Position (Detail) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Schedule of Available-for-sale Securities [Line Items]
Fair Value, Less than 12 Months	$ 623	$ 11,779
Unrealized Losses, Less than 12 Months	0	(40)
Fair Value, 12 Months or More	160	284
Unrealized Losses, 12 Months or More	0	(2)
Fair Value	783	12,063
Unrealized Losses	0	(42)
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	241	8,998
Unrealized Losses, Less than 12 Months	0	(26)
Fair Value, 12 Months or More	0	0
Unrealized Losses, 12 Months or More	0	0
Fair Value	241	8,998
Unrealized Losses	0	(26)
Foreign government
Schedule of Available-for-sale Securities [Line Items]
Fair Value, Less than 12 Months		50
Unrealized Losses, Less than 12 Months		0
Fair Value, 12 Months or More		0
Unrealized Losses, 12 Months or More		0
Fair Value		50
Unrealized Losses		0
Corporate debt
Schedule of Available-for-sale Securities [Line Items]
Fair Value, Less than 12 Months	382	2,731
Unrealized Losses, Less than 12 Months	0	(14)
Fair Value, 12 Months or More	160	284
Unrealized Losses, 12 Months or More	0	(2)
Fair Value	542	3,015
Unrealized Losses	$ 0	$ (16)

Investments - Additional Information (Detail) $ in Millions	6 Months Ended
Investments - Additional Information (Detail) $ in Millions	Jun. 30, 2016 USD ($) Securities	Dec. 31, 2015 Securities
Schedule of Available-for-sale Securities [Line Items]
Number of securities in unrealized loss position \| Securities	5	35
Proceeds from sale of investment in fixed maturity securities	$ 4.6
Investment security maturity date, start	Jan. 01, 2016
Investment security maturity date, End	Jun. 30, 2016
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	Jun. 30, 2016	Dec. 31, 2015
Amortized Cost
Due in one year or less	$ 2,910	$ 5,726
Due after one year through five years	22,421	12,038
Due after five years through ten years	330	330
Amortized Cost, Total	25,661	18,094
Fair Value
Due in one year or less	2,912	5,722
Due after one year through five years	22,638	12,041
Due after five years through ten years	354	329
Fair Value, Total	$ 25,904	$ 18,092

Losses and Loss Adjustment Reserve - Effects of Reinsurance on Premiums Written and Earned (Detail) $ in Thousands	6 Months Ended
	Jun. 30, 2016 USD ($)
Written
Direct premiums	$ 286,425
Ceded premiums	286,416
Net premiums	9
Earned
Direct premiums	297,160
Ceded premiums	297,151
Net premiums	$ 9

Losses and Loss Adjustment Reserve - Additional Information (Detail)	6 Months Ended
	Jun. 30, 2016 USD ($) Reinsurer	Dec. 31, 2015 USD ($)
Reinsurance Premiums for Insurance Companies, by Product Segment [Line Items]
Ceded rate of premiums under insurance program	100.00%
Premiums written net	$ 286,416,000
Ceded unpaid loss	60,800,000
Prepaid reinsurance premiums	298,907,000	$ 309,643,000
Increase (Decrease) in Loss and Loss Adjustment Expense Reserve	0
Reserve for losses and loss adjustment expense	$ 60,800,000
Number of reinsurers \| Reinsurer	2
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	8,400
Reinsurance recoverable, incurred but not reported claims	14,383
Other Liability
Reinsurance Premiums for Insurance Companies, by Product Segment [Line Items]
Ceded unpaid loss	$ 0
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%
Premiums written net	$ 285,700,000
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%
Ceded amount	$ 700,000

Statutory Financial Information - Additional Information (Detail) - Wright Flood	6 Months Ended
	Jun. 30, 2016 USD ($)
Statutory Accounting Practices [Line Items]
Statutory capital and surplus required	$ 7,500,000
Statutory capital and surplus	20,700,000
Statutory net Income	$ 5,500,000

Subsidiary Dividend Restrictions - Additional Information (Detail) - Wright Flood $ in Millions	6 Months Ended
	Jun. 30, 2016 USD ($)
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.
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 ($)	Jun. 30, 2016	Jan. 06, 2016	Dec. 31, 2015	Nov. 11, 2015	Aug. 11, 2015	Jul. 20, 2015	Mar. 05, 2015
Accelerated Share Repurchases [Line Items]
Shares repurchased, authorized amount	$ 250,000,000				$ 50,000,000	$ 400,000,000
Shares repurchased, number of shares received initially (in shares)	7,794,000		7,430,000		3,059,629
Fair value of common stock repurchased	$ 250,025,000		$ 238,775,000
Third Accelerated Share Repurchase Program [Member]
Accelerated Share Repurchases [Line Items]
Shares repurchased, authorized amount		$ 375,000,000
Shares repurchased, aggregate repurchase amount				$ (75,000,000)
Shares repurchased, number of shares received initially (in shares)		363,209		1,985,981
Fair value of common stock repurchased				$ 63,750,000
Accelerated Share Repurchase Agreement [Member]
Accelerated Share Repurchases [Line Items]
Shares repurchased, number of shares received initially (in shares)	7,793,579
Second Accelerated Share Repurchase Agreement
Accelerated Share Repurchases [Line Items]
Shares repurchased, aggregate repurchase amount							$ 100,000,000
Shares repurchased, number of shares received initially (in shares)					391,637		2,667,992
Fair value of common stock repurchased							$ 85,000,000
Repurchase Agreements [Member]
Accelerated Share Repurchases [Line Items]
Shares repurchased, authorized amount	$ 100,000,000

Statutory Financial Information	6 Months Ended
Statutory Financial Information	Jun. 30, 2016
Statutory Accounting Practices [Abstract]
Statutory Financial Information	Statutory Financial Information Wright Flood maintains capital in excess of the minimum statutory amount of $7.5 million as required by regulatory authorities. The unaudited statutory capital and surplus of Wright Flood was $20.7 million at June 30, 2016. For the period from January 1, 2016 through June 30, 2016, Wright Flood generated statutory net income of $5.5 million.

Basis of Financial Reporting Adopted Guidance (Details) $ in Millions	Dec. 31, 2015 USD ($)
Text Block [Abstract]
Debt Issuance Costs, Line of Credit Arrangements, Gross	$ 8.3

Basis of Financial Reporting Text Block (Details) - USD ($) $ in Thousands	6 Months Ended		12 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Text Block [Abstract]
Share-based Compensation	$ 6,674	$ 12,459	$ 15,500

Nature of Operations - Additional Information (Detail)	6 Months Ended
Nature of Operations - Additional Information (Detail)	Jun. 30, 2016 Segment
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of reportable segments	4