Brown & Brown (BRO) 10-Q/A 18 Aug 17 2015 Q3 Quarterly report (amended) Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2015	Oct. 29, 2015
Document And Entity Information [Abstract]
Document Type	10-Q/A
Amendment Flag	true
Amendment Description	Updated XBRL
Document Period End Date	Sep. 30, 2015
Document Fiscal Year Focus	2,015
Document Fiscal Period Focus	Q3
Trading Symbol	BRO
Entity Registrant Name	BROWN & BROWN INC
Entity Central Index Key	79,282
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		140,965,344

CONDENSED CONSOLIDATED STATEMEN

CONDENSED CONSOLIDATED STATEMENTS OF INCOME (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
REVENUES
Commissions and fees	$ 431,863	$ 420,615	$ 1,252,888	$ 1,177,312
Investment income	228	225	708	522
Other income, net	76	578	2,316	4,942
Total revenues	432,167	421,418	1,255,912	1,182,776
EXPENSES
Employee compensation and benefits	211,267	203,126	628,071	583,633
Non-cash stock-based compensation	4,889	5,640	17,348	19,149
Other operating expenses	66,121	64,916	191,591	177,923
Gain on disposal	(654)	0	(1,259)	0
Amortization	22,158	21,983	65,406	60,482
Depreciation	5,215	5,456	15,635	15,338
Interest	9,882	7,298	29,404	18,374
Change in estimated acquisition earn-out payables	459	314	2,194	6,574
Total expenses	319,337	308,733	948,390	881,473
Income before income taxes	112,830	112,685	307,522	301,303
Income taxes	45,403	44,354	122,139	118,802
Net income	$ 67,427	$ 68,331	$ 185,383	$ 182,501
Net income per share:
Basic (in dollars per share)	$ 0.48	$ 0.47	$ 1.31	$ 1.26
Diluted (in dollars per share)	0.47	0.47	1.29	1.24
Dividends declared per share (in dollars per share)	$ 0.11	$ 0.10	$ 0.33	$ 0.30

CONDENSED CONSOLIDATED BALANCE

CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Current Assets:
Cash and cash equivalents	$ 448,818	$ 470,048
Restricted cash and investments	217,646	259,769
Short-term investments	10,545	11,157
Premiums, commissions and fees receivable	424,416	424,547
Reinsurance recoverable	37,205	13,028
Prepaid reinsurance premiums	329,777	320,586
Deferred income taxes	17,152	25,431
Other current assets	58,290	45,542
Total current assets	1,543,849	1,570,108
Fixed assets, net	81,338	84,668
Goodwill	2,559,005	2,460,611
Amortizable intangible assets, net	758,096	784,642
Investments	22,943	19,862
Other assets	36,961	36,567
Total assets	5,002,192	4,956,458
Current Liabilities:
Premiums payable to insurance companies	531,004	568,184
Losses and loss adjustment reserve	37,205	13,028
Unearned premiums	329,777	320,586
Premium deposits and credits due customers	96,030	83,313
Accounts payable	56,877	57,261
Accrued expenses and other liabilities	172,404	181,156
Current portion of long-term debt	41,250	45,625
Total current liabilities	1,264,547	1,269,153
Long-term debt	1,118,589	1,152,846
Deferred income taxes, net	347,615	341,497
Other liabilities	85,706	79,217
Shareholders’ Equity:
Common stock, par value $0.10 per share; authorized 280,000 shares; issued 146,414 shares and outstanding 140,970 shares at 2015, issued 145,871 shares and outstanding 143,486 shares at 2014	14,641	14,587
Additional paid-in capital	439,335	405,982
Treasury stock, at cost 5,444 and 2,385 shares at 2015 and 2014, respectively	(175,025)	(75,025)
Retained earnings	1,906,744	1,768,201
Accumulated other comprehensive income, net of tax effect of $40 at 2015, of $0 at 2014	40	0
Total shareholders’ equity	2,185,735	2,113,745
Total liabilities and shareholders’ equity	$ 5,002,192	$ 4,956,458

CONDENSED CONSOLIDATED BALANCE4

CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED) (Parenthetical) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2015	Dec. 31, 2014
Common stock, par value (in dollars per share)	$ 0.10	$ 0.10
Common stock, shares authorized (in shares)	280,000,000	280,000,000
Common stock, shares issued (in shares)	146,414,000	145,871,000
Common stock, shares outstanding (in shares)	140,970,000	143,486,000
Treasury stock shares (in shares)	5,444,000	2,385,000
Tax effect of accumulated other comprehensive income	$ 40	$ 0

CONDENSED CONSOLIDATED STATEME5

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Cash flows from operating activities:
Net income	$ 185,383	$ 182,501
Adjustments to reconcile net income to net cash provided by operating activities:
Amortization	65,406	60,482
Depreciation	15,635	15,338
Non-cash stock-based compensation	17,348	19,149
Change in estimated acquisition earn-out payables	2,194	6,574
Deferred income taxes	16,974	17,200
Amortization of debt discount	118	0
Income tax benefit from exercise of shares from the stock benefit plans	(2,502)	(2,983)
Payments On Acquisition Earn Outs In Excess Of Original Estimated Payables	(4,917)	(2,539)
Net gain on sales of investments, fixed assets and customer accounts	(830)	(2,654)
Changes in operating assets and liabilities, net of effect from acquisitions and divestitures:
Restricted cash and investments decrease (increase)	42,123	(25,837)
Premiums, commissions and fees receivable decrease	2,277	21,078
Reinsurance recoverables (increase) decrease	(24,177)	2,052
Prepaid reinsurance premiums (increase)	(9,191)	(56,923)
Other assets (increase)	(13,076)	(4,957)
Premiums payable to insurance companies (decrease)	(37,845)	(24,749)
Premium deposits and credits due customers increase	12,717	18,504
Losses and loss adjustment reserve increase (decrease)	24,177	(2,052)
Unearned premiums increase	9,191	56,923
Accounts payable increase	27,793	26,375
Accrued expenses and other liabilities (decrease) increase	(11,547)	321
Other liabilities (decrease)	(26,610)	(18,453)
Net cash provided by operating activities	290,641	285,350
Cash flows from investing activities:
Additions to fixed assets	(12,773)	(20,189)
Payments for businesses acquired, net of cash acquired	(109,926)	(694,816)
Proceeds from sales of fixed assets and customer accounts	4,794	3,392
Purchases and proceeds from sales of investments	(2,415)	(89)
Net cash used in investing activities	(120,320)	(711,702)
Cash flows from financing activities:
Payments on acquisition earn-outs	(22,020)	(9,353)
Proceeds from Issuance of Long-term Debt	0	1,048,432
Payments on long-term debt	(38,750)	(330,000)
Income tax benefit from exercise of shares from the stock benefit plans	2,502	2,983
Issuances of common stock for employee stock benefit plans	15,854	14,753
Repurchase stock benefit plan shares for employees to fund tax withholdings	(2,297)	(2,751)
Purchase of treasury stock	(100,000)	(67,525)
Prepayment of accelerated share repurchase program	0	(7,500)
Cash dividends paid	(46,840)	(43,547)
Net cash (used in) provided by financing activities	(191,551)	605,492
Net (decrease) increase in cash and cash equivalents	(21,230)	179,140
Cash and cash equivalents at beginning of period	470,048	202,952
Cash and cash equivalents at end of period	448,818	382,092
Proceeds from Lines of Credit	0	475,000
Repayments of Lines of Credit	$ 0	$ 475,000

Nature of Operations

Nature of Operations	9 Months Ended
	Sep. 30, 2015
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 catastrophe 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 (“NFIP”), 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

Basis of Financial Reporting	9 Months Ended
	Sep. 30, 2015
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, 2014 . 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. Segment results for prior periods have been recast to reflect the current year segmental structure. Certain reclassifications have been made to the prior-year amounts reported in this Quarterly Report on Form 10-Q in order to conform to the current-year presentation. Recently Issued Accounting Pronouncements In September 2015, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") No. 2015-16, “Business Combinations (Topic 805): Simplifying the Accounting for Measurement-Period Adjustments” (“ASU 2015-16”), which requires that an acquirer recognize adjustments to provisional amounts that are identified during the measurement period in the reporting period in which the adjustment amounts are determined. ASU 2015-16 is effective for fiscal years, and interim reporting periods within those fiscal years, beginning after December 15, 2015. The Company is currently evaluating the impact of the adoption of this guidance on the Consolidated Financial Statements. In April 2015, FASB issued ASU No. 2015-05, "Intangibles-Goodwill and Other-Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Fees Paid in a Cloud Computing Arrangement" ("ASU 2015-05"), which issues guidance on determining whether a cloud computing arrangement contains a software license that should be accounted for as internal-use software. If a cloud computing arrangement does not contain a software license, it should be accounted for as a service contract. This guidance is effective for fiscal years beginning after December 15, 2015 and for interim periods within those fiscal years, with early adoption permitted. The Company is currently evaluating the impact of the adoption of this guidance on the Consolidated Financial Statements. In April 2015, FASB issued ASU No. 2015-03, "Simplifying the Presentation of Debt Issuance Costs" ("ASU 2015-03"), which requires that debt issuance costs related to a recognized debt liability be presented in the balance sheet as a direct deduction from the carrying amount of that debt liability, consistent with debt discounts, and not recorded as separate assets. This update is effective for reporting periods beginning after December 15, 2015, and is to be applied on a retrospective basis. The Company plans to adopt ASU 2015-03 in the first quarter of 2016. As the Company's debt issuance costs are not material, implementation of this update is not expected to have a material impact on the Company's Consolidated Financial Statements. In August 2014, FASB issued ASU No. 2014-15, “Disclosure of Uncertainties About an Entity’s Ability to Continue as a Going Concern” (“ASU 2014-15”), which addresses management’s responsibility in evaluating whether there is substantial doubt about a company’s ability to continue as a going concern and to provide related footnote disclosures. ASU 2014-15 is effective for fiscal years beginning after December 15, 2016 and for interim periods within those fiscal years, with early adoption permitted. The Company does not expect to early adopt this guidance, and it believes the adoption of this guidance will not have an impact on the Condensed Consolidated Financial Statements. In May 2014, FASB issued ASU No. 2014-09, “Revenue from Contracts with Customers” (“ASU 2014-09”), which provides guidance for revenue recognition. ASU 2014-09 affects any entity that either enters into contracts with customers to transfer goods or services or enters into contracts for the transfer of nonfinancial assets, and supersedes the revenue recognition requirements in Topic 605, “Revenue Recognition,” and most industry-specific guidance. The standard’s core principle is that a company will recognize revenue when it transfers promised goods or services to customers in an amount that reflects the consideration to which a company expects to be entitled in exchange for those goods or services. In doing so, companies will need to use more judgment and make more estimates than under the current guidance. These may include identifying performance obligations in the contract, estimating the amount of variable consideration to include in the transaction price and allocating the transaction price to each separate performance obligation. ASU 2014-09 is effective for the Company beginning January 1, 2018, after FASB voted to delay the effective date by one year. At that time, the Company may adopt the new standard under the full retrospective approach or the modified retrospective approach. The Company is currently evaluating its revenue streams against the requirements of this pronouncement.

Net Income Per Share

Net Income Per Share	9 Months Ended
	Sep. 30, 2015
Earnings Per Share [Abstract]
Net Income Per Share	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 For the nine months (in thousands, except per share data) 2015 2014 2015 2014 Net income $ 67,427 $ 68,331 $ 185,383 $ 182,501 Net income attributable to unvested awarded performance stock (1,565 ) (1,681 ) (4,370 ) (4,604 ) Net income attributable to common shares $ 65,862 $ 66,650 $ 181,013 $ 177,897 Weighted average number of common shares outstanding – basic 140,955 144,469 141,517 144,909 Less unvested awarded performance stock included in weighted average number of common shares outstanding – basic (3,271 ) (3,554 ) (3,336 ) (3,656 ) Weighted average number of common shares outstanding for basic earnings per common share 137,684 140,915 138,181 141,253 Dilutive effect of stock options 2,357 2,049 2,265 1,849 Weighted average number of shares outstanding – diluted 140,041 142,964 140,446 143,102 Net income per share: Basic $ 0.48 $ 0.47 $ 1.31 $ 1.26 Diluted $ 0.47 $ 0.47 $ 1.29 $ 1.24

Business Combinations

Business Combinations	9 Months Ended
	Sep. 30, 2015
Business Combinations [Abstract]
Business Combinations	Business Combinations During the nine months ended September 30, 2015 , Brown & Brown acquired the assets and assumed certain liabilities of nine insurance intermediaries and four books of business (customer accounts). Additionally, miscellaneous adjustments were recorded to the purchase price allocation of certain prior acquisitions completed within the last twelve months as permitted by Accounting Standards Codification Topic 805 — Business Combinations (“ASC 805”). Such adjustments are presented in the "Other" category within the following two tables. All of these acquisitions 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 nine months ended September 30, 2015 , several adjustments were made within the permitted measurement period that resulted in a decrease in the aggregate purchase price of the affected acquisitions of $503,442 relating to the assumption of certain liabilities. Cash paid for acquisitions was $ 109.9 million and $ 720.1 million in the nine -month periods ended September 30, 2015 and 2014 , respectively. We completed nine acquisitions (excluding book of business purchases) in the nine -month period ended September 30, 2015 . We completed six acquisitions (excluding book of business purchases) in the nine -month period ended September 30, 2014 . The following table summarizes the purchase price allocation made as of the date of each acquisition for current year acquisitions and significant adjustments made during the measurement period for prior year acquisitions: (in thousands) Name Business Segment Effective Date of Acquisition Cash Paid Other Payable Recorded Earn-Out Payable Net Assets Acquired Maximum Potential Earn- Out Payable Liberty Insurance Brokers, Inc. and Affiliates (Liberty) Retail February 1, 2015 $ 12,000 $ — $ 2,981 $ 14,981 $ 3,750 Spain Agency, Inc. Retail March 1, 2015 20,706 — 2,617 23,323 9,162 Bellingham Underwriters, Inc. National Programs May 1, 2015 9,007 500 3,322 12,829 4,400 Fitness Insurance, LLC Retail June 1, 2015 9,455 — 2,386 11,841 3,500 Strategic Benefit Advisors, Inc. Retail June 1, 2015 49,600 400 14,441 64,441 26,000 Other Various Various 9,158 95 3,749 13,002 6,267 Total $ 109,926 $ 995 $ 29,496 $ 140,417 $ 53,079 The following table summarizes the estimated fair values of the aggregate assets and liabilities acquired as of the date of each acquisition. The data included in the ‘Other’ column shows a negative adjustment for purchased customer accounts. This is driven mainly by the final valuation adjustment for the acquisition of Wright. (in thousands) Liberty Spain Agency, Inc. Bellingham Underwriters, Inc. Fitness Insurance, LLC Strategic Benefit Advisors, Inc. Other Total Other current assets $ 2,486 $ — $ — $ — $ — $ 170 $ 2,656 Fixed assets 40 50 25 17 41 32 205 Goodwill 10,010 16,036 9,608 8,084 39,865 17,029 100,632 Purchased customer accounts 4,506 7,430 3,223 3,740 24,500 (4,105 ) 39,294 Non-compete agreements 24 21 21 — 21 123 210 Other assets — — — — 14 — 14 Total assets acquired 17,066 23,537 12,877 11,841 64,441 13,249 143,011 Other current liabilities (42 ) (214 ) (48 ) — — (3,458 ) (3,762 ) Deferred income tax, net — — — — — 2,576 2,576 Other liabilities (2,043 ) — — — — 635 (1,408 ) Total liabilities assumed (2,085 ) (214 ) (48 ) — — (247 ) (2,594 ) Net assets acquired $ 14,981 $ 23,323 $ 12,829 $ 11,841 $ 64,441 $ 13,002 $ 140,417 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 $100,632,000 was allocated to the Retail, National Programs and Wholesale Brokerage Segments in the amounts of $78,018,000 , $18,009,000 and $4,605,000 , respectively. Of the total goodwill of $100,632,000 , $62,735,000 is currently deductible for income tax purposes and $8,401,000 is non-deductible. The remaining $29,496,000 relates to the recorded earn-out payables and will not be deductible until it is earned and paid. For the acquisitions completed during 2015, the results of operations since the acquisition dates have been combined with those of the Company. The total revenues from the acquisitions completed through September 30, 2015 , included in the Condensed Consolidated Statement of Income for the three and nine months ended September 30, 2015 , were $9,218,000 and $16,640,000 , respectively. The income before income taxes, including the intercompany cost of capital charge, from the acquisitions completed through September 30, 2015 , included in the Condensed Consolidated Statement of Income for the three and nine months ended September 30, 2015 , was $397,000 and $1,243,000 , respectively. If the acquisitions had occurred as of the beginning of the respective periods, the Company’s results of operations would be as shown in the following table. These unaudited pro forma results are not necessarily indicative of the actual results of operations that would have occurred had the acquisitions actually been made at the beginning of the respective periods. (UNAUDITED) For the three months For the nine months (in thousands, except per share data) 2015 2014 2015 2014 Total revenues $ 432,276 $ 431,703 $ 1,267,812 $ 1,212,241 Income before income taxes $ 112,855 $ 115,712 $ 311,429 $ 310,302 Net income $ 67,442 $ 70,166 $ 187,738 $ 187,952 Net income per share: Basic $ 0.48 $ 0.49 $ 1.33 $ 1.30 Diluted $ 0.47 $ 0.48 $ 1.31 $ 1.28 Weighted average number of shares outstanding: Basic 137,684 140,915 138,181 141,253 Diluted 140,041 142,964 140,446 143,102 As of September 30, 2015 and 2014 , 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 nine months ended September 30, 2015 and 2014 , were as follows: For the three months For the nine months (in thousands) 2015 2014 2015 2014 Balance as of the beginning of the period $ 90,113 $ 52,696 $ 75,283 $ 43,058 Additions to estimated acquisition earn-out payables 2,363 (221 ) 29,496 14,586 Payments for estimated acquisition earn-out payables (12,899 ) (463 ) (26,937 ) (11,892 ) Subtotal 79,577 52,012 77,842 45,752 Net change in earnings from estimated acquisition earn-out payables: Change in fair value on estimated acquisition earn-out payables (365 ) (247 ) (30 ) 4,981 Interest expense accretion 824 561 2,224 1,593 Net change in earnings from estimated acquisition earn-out payables 459 314 2,194 6,574 Balance as of September 30, $ 80,036 $ 52,326 $ 80,036 $ 52,326 Of the $80.0 million estimated acquisition earn-out payables as of September 30, 2015 , $32.3 million was recorded as accounts payable and $47.7 million was recorded as other non-current liabilities. Included within additions to estimated acquisition earn-out payables are any adjustments to opening balance sheet items prior to the one-year anniversary date and may therefore differ from previously reported amounts.

Goodwill

Goodwill	9 Months Ended
	Sep. 30, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill	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, 2014, and identified no impairment as a result of the evaluation. The changes in the carrying value of goodwill by reportable segment for the nine months ended September 30, 2015 are as follows: (in thousands) Retail National Programs Wholesale Brokerage Services Total Balance as of January 1, 2015 $ 1,231,869 $ 886,095 $ 222,356 $ 120,291 $ 2,460,611 Goodwill of acquired businesses 78,018 18,009 4,605 — 100,632 Goodwill disposed of relating to sales of businesses — (2,238 ) — — (2,238 ) Balance as of September 30, 2015 $ 1,309,887 $ 901,866 $ 226,961 $ 120,291 $ 2,559,005

Amortizable Intangible Assets

Amortizable Intangible Assets	9 Months Ended
	Sep. 30, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Amortizable Intangible Assets	Amortizable Intangible Assets Amortizable intangible assets at September 30, 2015 and December 31, 2014 consisted of the following: September 30, 2015 December 31, 2014 (in thousands) Gross Carrying Value Accumulated Amortization Net Carrying Value Weighted Average Life (Years)(1) Gross Carrying Value Accumulated Amortization Net Carrying Value Weighted Average Life (Years)(1) Purchased customer accounts $ 1,392,323 $ (636,906 ) $ 755,417 15.0 $ 1,355,550 $ (574,285 ) $ 781,265 14.9 Non-compete agreements 29,345 (26,666 ) 2,679 6.8 29,139 (25,762 ) 3,377 6.8 Total $ 1,421,668 $ (663,572 ) $ 758,096 $ 1,384,689 $ (600,047 ) $ 784,642 (1) Weighted average life calculated as of the date of acquisition. Amortization expense for amortizable intangible assets for the years ending December 31, 2015 , 2016 , 2017 , 2018 and 2019 is estimated to be $87.5 million , $84.0 million , $81.1 million , $75.9 million , and $71.4 million , respectively.

Long-Term Debt

Long-Term Debt	9 Months Ended
	Sep. 30, 2015
Debt Disclosure [Abstract]
Long-Term Debt	Long-Term Debt Long-term debt at September 30, 2015 and December 31, 2014 consisted of the following: (in thousands) September 30, 2015 December 31, 2014 Current portion of long-term debt: Current portion of 5-year term loan facility expires 2019 $ 41,250 $ 20,625 5.370% senior notes, Series D, quarterly interest payments, balloon due 2015 — 25,000 Total current portion of long-term debt 41,250 45,625 Long-term debt: Note agreements: 5.660% senior notes, Series C, semi-annual interest payments, balloon due 2016 25,000 25,000 4.500% senior notes, Series E, quarterly interest payments, balloon due 2018 100,000 100,000 4.200% senior notes, semi-annual interest payments, balloon due 2024 498,589 498,471 Total notes 623,589 623,471 Credit agreements: 5-year term-loan facility, periodic interest and principal payments, currently LIBOR plus 1.375%, expires May 20, 2019 495,000 529,375 5-year revolving-loan facility, periodic interest payments, currently LIBOR plus 1.175%, plus commitment fees of 0.20%, expires May 20, 2019 — — Revolving credit loan, quarterly interest payments, LIBOR plus up to 1.40% and availability fee up to 0.25%, expires December 31, 2016 — — Total credit agreements 495,000 529,375 Total long-term debt 1,118,589 1,152,846 Current portion of long-term debt 41,250 45,625 Total debt $ 1,159,839 $ 1,198,471 On December 22, 2006, the Company entered into a Master Shelf and Note Purchase Agreement (the “Master Agreement”) with a national insurance company (the “Purchaser”). The initial issuance of notes under the Master Agreement occurred on December 22, 2006, through the issuance of $25.0 million in Series C Senior Notes due December 22, 2016, with a fixed interest rate of 5.66% per year. On February 1, 2008, $25.0 million in Series D Senior Notes due January 15, 2015, with a fixed interest rate of 5.37% per year, were issued. On September 15, 2011, and pursuant to a Confirmation of Acceptance (the “Confirmation”), dated January 21, 2011, in connection with the Master Agreement, $100.0 million in Series E Senior Notes were issued and are due September 15, 2018, with a fixed interest rate of 4.50% per year. The Series E Senior Notes were issued for the sole purpose of retiring existing senior notes. On January 15, 2015 the Series D Notes were redeemed at maturity using cash proceeds to pay off the principal of $25.0 million plus any remaining accrued interest. As of September 30, 2015 , there was an outstanding debt balance issued under the provisions of the Master Agreement of $125.0 million . On July 1, 2013, in conjunction with the acquisition of Beecher Carlson Holdings, Inc., the Company entered into a revolving loan agreement (the “Wells Fargo Agreement”) with Wells Fargo Bank, N.A. that provided for a $50.0 million revolving line of credit (the “Wells Fargo Revolver”). The maturity date for the Wells Fargo Revolver is December 31, 2016 , at which time all outstanding principal and unpaid interest will be due. On April 16, 2014, in connection with the signing of the Credit Facility (as defined below) an amendment to the agreement was established to reduce the total revolving loan commitment from $50.0 million to $25.0 million . The Wells Fargo Revolver may be increased by up to $50.0 million (bringing the total amount available to $75.0 million ). The calculation of interest and fees for the Wells Fargo Agreement is generally based on the Company’s funded debt-to-EBITDA ratio. Interest is charged at a rate equal to 1.00% to 1.40% above LIBOR or 1.00% below the Base Rate, each as more fully described in the Wells Fargo Agreement. Fees include an up-front fee, an availability fee of 0.175% to 0.25% , and a letter of credit margin fee of 1.00% to 1.40% . The obligations under the Wells Fargo Revolver are unsecured and the Wells Fargo Agreement includes various covenants, limitations and events of default that are customary for similar facilities for similar borrowers. There were no borrowings against the Wells Fargo Revolver as of September 30, 2015 and December 31, 2014. On October 12, 2012, the Company entered into a Master Note Facility Agreement (the “New Master Agreement”) with another national insurance company (the “New Purchaser”). The New Master Agreement provides for a $125.0 million private uncommitted “shelf” facility for the issuance of unsecured senior notes over a three -year period, with interest rates that may be fixed or floating and with such maturity dates, not to exceed ten years, as the parties may determine. The New Master Agreement includes various covenants, limitations, and events of default similar to the Master Agreement. At September 30, 2015 and December 31, 2014, there were no borrowings against this facility. 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 September 30, 2015 and December 31, 2014, there was an outstanding debt balance issued under the provisions of the Credit Facility in total of $536.3 million and $550.0 million respectively, with no borrowings outstanding relative to the revolving loan. Per the terms of the agreement, a scheduled principal payment of $6.9 million is due on December 31, 2015. 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 September 30, 2015 and December 31, 2014, there was an outstanding debt balance of $500.0 million exclusive of the associated discount balance. The Master Agreement, Wells Fargo Agreement and the Credit Agreement all require the Company to maintain certain financial ratios and comply with certain other covenants. The Company was in compliance with all such covenants as of September 30, 2015 and December 31, 2014. The 30-day Adjusted LIBOR Rate as of September 30, 2015 was 0.25% .

Supplemental Disclosures of Cas

Supplemental Disclosures of Cash Flow Information and Non-Cash Financing and Investing Activities	9 Months Ended
	Sep. 30, 2015
Supplemental Cash Flow Elements [Abstract]
Supplemental Disclosures of Cash Flow Information and Non-Cash Financing and Investing Activities	Supplemental Disclosures of Cash Flow Information and Non-Cash Financing and Investing Activities Our Restricted Cash balance is comprised of funds held in separate premium trust accounts as required by state law or, in some cases, per agreement with our carrier partners. In the second quarter of 2015 , certain balances that had previously been reported as held in restricted premium trust accounts were reclassified as non-restricted as they were not restricted by state law or by contractual agreement with a carrier. The resulting impact of this change was a reduction in the balance reported on our Condensed Consolidated Balance Sheet as Restricted Cash and Investments and a corresponding increase in the balance reported as Cash and Cash Equivalents of approximately $41.0 million as of June 30, 2015 and $27.6 million as of September 30, 2015 as compared to the corresponding account balances as of December 31, 2014 of $32.2 million which was reflected as Restricted Cash. While these referenced funds are not restricted, they do represent premium payments from customers to be paid to insurance carriers and this change in classification should not be viewed as a source of operating cash. For the nine months (in thousands) 2015 2014 Cash paid during the period for: Interest $ 33,091 $ 19,940 Income taxes $ 96,579 $ 92,018 Brown & Brown’s significant non-cash investing and financing activities are summarized as follows: For the nine months (in thousands) 2015 2014 Other payable issued for purchased customer accounts $ 995 $ 1,623 Estimated acquisition earn-out payables and related charges $ 29,497 $ 12,937 Notes received on the sale of fixed assets and customer accounts $ 544 $ 296

Legal and Regulatory Proceeding

Legal and Regulatory Proceedings	9 Months Ended
	Sep. 30, 2015
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 many 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. Although the ultimate outcome of such matters cannot be ascertained and liabilities in indeterminate amounts may be imposed on Brown & Brown, Inc. or its subsidiaries, on the basis of present information and the availability of insurance and legal advice, it is the opinion of management that the disposition or ultimate determination of such claims will not have a material adverse effect on the Company’s consolidated financial position. 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 the unfavorable resolution of these matters.

Segment Information

Segment Information	9 Months Ended
	Sep. 30, 2015
Segment Reporting [Abstract]
Segment Information	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 offices; 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 catastrophe claims adjusting services. Brown & Brown conducts all of its operations within the United States of America, except for one wholesale brokerage operation based in London, England, and retail operations in Bermuda and the Cayman Islands. These non-United States operations earned $3.2 million and $3.2 million of total revenues for the three months ended September 30, 2015 and 2014 , respectively. These operations earned $9.3 million and $10.2 million of total revenues for the nine months ended September 30, 2015 and 2014 , respectively. Long-lived assets held outside of the United States as of September 30, 2015 and 2014 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, 2014 . The Company evaluates the performance of its segments based upon revenues and income before income taxes. Inter-segment revenues are eliminated. Summarized financial information concerning the Company’s reportable segments is shown in the following table. The “Other” column includes any income and expenses not allocated to reportable segments and corporate-related items, including the inter-company interest expense charge to the reporting segment. For the three months ended September 30, 2015 (in thousands) Retail National Programs Wholesale Brokerage Services Other Total Total revenues $ 216,249 $ 116,966 $ 61,374 $ 37,980 $ (402 ) $ 432,167 Investment income $ 19 $ 49 $ 3 $ — $ 157 $ 228 Amortization $ 11,552 $ 7,133 $ 2,441 $ 1,022 $ 10 $ 22,158 Depreciation $ 1,632 $ 1,850 $ 506 $ 474 $ 753 $ 5,215 Interest expense $ 10,121 $ 13,398 $ 200 $ 1,527 $ (15,364 ) $ 9,882 Income before income taxes $ 41,785 $ 25,281 $ 22,276 $ 6,022 $ 17,466 $ 112,830 Total assets $ 3,400,407 $ 2,542,619 $ 880,454 $ 296,659 $ (2,117,947 ) $ 5,002,192 Capital expenditures $ 1,637 $ 1,754 $ 425 $ 233 $ 127 $ 4,176 For the three months ended September 30, 2014 (in thousands) Retail National Programs Wholesale Brokerage Services Other Total Total revenues $ 206,504 $ 117,926 $ 61,620 $ 35,492 $ (124 ) $ 421,418 Investment income $ 16 $ 48 $ 9 $ — $ 152 $ 225 Amortization $ 10,920 $ 7,343 $ 2,676 $ 1,034 $ 10 $ 21,983 Depreciation $ 1,632 $ 2,143 $ 640 $ 555 $ 486 $ 5,456 Interest expense $ 10,882 $ 15,915 $ 299 $ 1,937 $ (21,735 ) $ 7,298 Income before income taxes $ 39,823 $ 20,694 $ 21,750 $ 5,145 $ 25,273 $ 112,685 Total assets $ 3,163,014 $ 2,508,815 $ 895,943 $ 285,307 $ (1,907,331 ) $ 4,945,748 Capital expenditures $ 1,320 $ 5,243 $ 492 $ 325 $ 232 $ 7,612 For the nine months ended September 30, 2015 (in thousands) Retail National Programs Wholesale Brokerage Services Other Total Total revenues $ 657,314 $ 319,577 $ 168,619 $ 111,128 $ (726 ) $ 1,255,912 Investment income $ 62 $ 150 $ 148 $ 1 $ 347 $ 708 Amortization $ 33,671 $ 21,343 $ 7,296 $ 3,067 $ 29 $ 65,406 Depreciation $ 4,908 $ 5,372 $ 1,630 $ 1,533 $ 2,192 $ 15,635 Interest expense $ 30,841 $ 42,306 $ 645 $ 4,722 $ (49,110 ) $ 29,404 Income before income taxes $ 137,249 $ 48,567 $ 53,150 $ 16,062 $ 52,494 $ 307,522 Total assets $ 3,400,407 $ 2,542,619 $ 880,454 $ 296,659 $ (2,117,947 ) $ 5,002,192 Capital expenditures $ 4,410 $ 5,004 $ 2,087 $ 774 $ 498 $ 12,773 For the nine months ended September 30, 2014 (in thousands) Retail National Programs Wholesale Brokerage Services Other Total Total revenues $ 626,194 $ 288,087 $ 165,894 $ 102,891 $ (290 ) $ 1,182,776 Investment income $ 48 $ 119 $ 20 $ 2 $ 333 $ 522 Amortization $ 31,812 $ 17,512 $ 8,028 $ 3,101 $ 29 $ 60,482 Depreciation $ 4,850 $ 5,503 $ 1,890 $ 1,646 $ 1,449 $ 15,338 Interest expense $ 33,000 $ 33,803 $ 1,060 $ 5,878 $ (55,367 ) $ 18,374 Income before income taxes $ 129,213 $ 47,640 $ 47,863 $ 12,977 $ 63,610 $ 301,303 Total assets $ 3,163,014 $ 2,508,815 $ 895,943 $ 285,307 $ (1,907,331 ) $ 4,945,748 Capital expenditures $ 5,016 $ 12,369 $ 1,205 $ 860 $ 739 $ 20,189

Investments

Investments	9 Months Ended
	Sep. 30, 2015
Investments, Debt and Equity Securities [Abstract]
Investments	Investments At September 30, 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 $ 15,640 $ 74 $ — $ 15,714 Foreign government 50 — — 50 Corporate debt 5,280 14 (5 ) 5,289 Short duration fixed income fund 1,860 30 — 1,890 Total $ 22,830 $ 118 $ (5 ) $ 22,943 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 September 30, 2015 : (in thousands) Less than 12 Months 12 Months or More Total Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses Corporate debt 1,498 3 485 2 1,983 5 Total $ 1,498 $ 3 $ 485 $ 2 $ 1,983 $ 5 The unrealized losses from corporate issuers were caused by interest rate increases. At September 30, 2015 , the Company had 15 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 September 30, 2015 . At December 31, 2014 , the Company’s amortized cost and fair values of fixed maturity securities are summarized as follows: (in thousands) Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value U.S. Treasury securities, obligations of U.S. Government agencies and Municipals $ 10,774 $ 7 $ (1 ) $ 10,780 Foreign government 50 — — 50 Corporate debt 5,854 9 (11 ) 5,852 Short duration fixed income fund 3,143 37 3,180 Total $ 19,821 $ 53 $ (12 ) $ 19,862 The following table shows the investments’ gross unrealized loss and fair value, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position as of December 31, 2014 : (in thousands) Less than 12 Months 12 Months or More Total Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses U.S. Treasury securities, obligations of U.S. Government agencies and Municipals $ 3,994 $ 1 $ — $ — $ 3,994 $ 1 Foreign Government 50 — — — 50 — Corporate debt 4,439 11 — — 4,439 11 Total $ 8,483 $ 12 $ — $ — $ 8,483 $ 12 The unrealized losses from corporate issuers were caused by interest rate increases. At December 31, 2014 , the Company had 38 securities in an unrealized loss position. The contractual cash flows of the U.S. Treasury Securities and obligations of the U.S. Government agencies investments are either guaranteed by the U.S. Government or an agency of the U.S. Government. Accordingly, it is expected that the securities would not be settled at a price less than the amortized cost of the Company’s investment. The corporate securities are highly rated securities with no indicators of potential impairment. Based on the ability and intent of the Company to hold these investments until recovery of fair value, which may be maturity, the bonds were not considered to be other-than-temporarily impaired at December 31, 2014 . The amortized cost and estimated fair value of the fixed maturity securities at September 30, 2015 by contractual maturity are set forth below: (in thousands) Amortized Cost Fair Value Years to maturity: Due in one year or less $ 9,034 $ 9,039 Due after one year through five years 13,466 13,569 Due after five years through ten years 330 335 Total $ 22,830 $ 22,943 The amortized cost and estimated fair value of the fixed maturity securities at December 31, 2014 by contractual maturity are set forth below: (in thousands) Amortized Cost Fair Value Years to maturity: Due in one year or less $ 5,628 $ 5,628 Due after one year through five years 13,863 13,897 Due after five years through ten years 330 337 Total $ 19,821 $ 19,862 The expected maturities in the foregoing table may differ from the contractual maturities because certain borrowers have the right to call or prepay obligations with or without penalty. Proceeds from sales of the Company’s investment in fixed maturity securities were $2.2 million including maturities from the period January 1, 2015 to September 30, 2015 . The gains and losses realized on those sales for the period from January 1, 2015 to September 30, 2015 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 September 30, 2015 , investments with a fair value of approximately $4.0 million were on deposit with state insurance departments to satisfy regulatory requirements.

Losses and Loss Adjustment Rese

Losses and Loss Adjustment Reserve	9 Months Ended
	Sep. 30, 2015
Reinsurance Disclosures [Abstract]
Losses and Loss Adjustment Reserve	Losses and Loss Adjustment Reserve Although the reinsurers are liable to the Company for amounts reinsured, 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 Wright Flood when they become due. The effects of reinsurance on premiums written and earned are as follows: (in thousands) Period from January 1, 2015 to Written Earned Direct premiums $ 468,761 $ 459,552 Assumed premiums — 18 Ceded premiums 468,750 459,559 Net premiums $ 11 $ 11 All premiums written by Wright Flood under the National Flood Insurance Program are 100% ceded to FEMA, for which Wright Flood received a 30.8% expense allowance from January 1, 2015 through September 30, 2015 . For the period from January 1, 2015 through September 30, 2015 , the Company ceded $467.8 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 $0.9 million for the period from January 1, 2015 through September 30, 2015 . 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 September 30, 2015 , ceded unpaid losses and loss adjustment expenses for Homeowners, Private Passenger Auto Liability and Other Liability Occurrence was $8,698 , $48,254 and $756 , respectively. The incurred but not reported balance was $102 for Homeowners and $39,424 for Private Passenger Auto Liability. The reinsurance recoverable balance as of September 30, 2015 was $367.0 million and was comprised of recoverables on unpaid losses and loss expenses of $37.2 million and prepaid reinsurance premiums of $329.8 million . There was no net activity in the reserve for losses and loss adjustment expense during the period January 1, 2015 through September 30, 2015 , as Wright Flood's direct premiums written were 100% ceded to three reinsurers. The balance of the reserve for losses and loss adjustment expense, excluding related reinsurance recoverable, as of September 30, 2015 was $37.2 million .

Statutory Financial Information

Statutory Financial Information	9 Months Ended
	Sep. 30, 2015
Statutory Accounting Practices [Abstract]
Statutory Financial Information	Statutory Financial Information Wright Flood is required to maintain minimum amounts of statutory capital and surplus of $7.5 million as required by regulatory authorities. Wright Flood’s statutory capital and surplus exceeded their respective minimum statutory requirements. The unaudited statutory capital and surplus of Wright Flood was $14.2 million at September 30, 2015 . For the period from January 1, 2015 through September 30, 2015 , Wright Flood generated statutory net income of $3.2 million .

Subsidiary Dividend Restriction

Subsidiary Dividend Restrictions	9 Months Ended
	Sep. 30, 2015
Disclosure of Restrictions on Dividends, Loans and Advances Disclosure [Abstract]
Subsidiary Dividend Restrictions	Subsidiary Dividend Restrictions Under the insurance regulations of Texas, the maximum amount of ordinary dividends that Wright Flood can pay to shareholders in a rolling twelve month period is limited to the greater of 10% of statutory adjusted capital and surplus as shown on Wright Flood’s last annual statement on file with the superintendent of the Texas Department of Insurance or 100% of adjusted net income. The maximum dividend payout that may be made in 2015 without prior approval is $2.3 million .

Shareholders' Equity

Shareholders' Equity	9 Months Ended
	Sep. 30, 2015
Equity [Abstract]
Shareholders' Equity	Shareholders’ Equity On July 21, 2014, the Company’s Board of Directors authorized the repurchase of up to $200.0 million of its shares of common stock. This was in addition to the $25.0 million that was authorized in the first quarter and executed in the second quarter of 2014. On September 2, 2014, the Company entered into an accelerated share repurchase agreement (“ASR”) with an investment bank to purchase an aggregate $50.0 million of the Company’s common stock. The total number of shares purchased under the ASR of 1,539,760 was determined upon settlement of the final delivery and was based on the Company’s volume weighted average price per its common share over the ASR period less a discount. On March 5, 2015, the Company entered into a second 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 . The initial delivery of 2,667,992 shares reduced the outstanding shares used to determine the Company’s weighted average shares outstanding for purposes of calculating basic and diluted earnings per share. 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. With the latest delivery of 391,637 shares, a total of 5,444,389 shares have been repurchased since the first quarter of 2014. On July 20, 2015, the Company’s Board of Directors authorized the repurchase of up to an additional $400.0 million of the Company's outstanding common stock. With this authorization, the Company has approval to repurchase up to $450.0 million, in the aggregate, of the Company's outstanding common stock. The shares may be purchased from time to time, at the Company’s discretion and subject to the availability of stock, market conditions, the trading price of the stock, alternative uses for capital, the Company’s financial performance and other potential factors. These purchases may be carried out through open market purchases, block trades, accelerated share repurchase plans of up to $100.0 million each (unless otherwise approved by the Board of Directors), negotiated private transactions or pursuant to any trading plan that may be adopted in accordance with Rule 10b5-1 of the Securities Exchange Act of 1934.

Nature of Operations (Policies)

Nature of Operations (Policies)	9 Months Ended
	Sep. 30, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Nature of Operations	Brown & Brown, Inc., a Florida corporation, and its subsidiaries (collectively, “Brown & Brown” or the “Company”) is a diversified insurance agency, wholesale brokerage, insurance programs and services organization that markets and sells to its customers, insurance products and services, primarily in the property and casualty area. Brown & Brown’s business is divided into four reportable segments: the Retail Segment provides a broad range of insurance products and services to commercial, public entity, professional and individual customers; the National Programs Segment, acting as a managing general agent (“MGA”), provides professional liability and related package products for certain professionals, a range of insurance products for individuals, flood coverage, and targeted products and services designated for specific industries, trade groups, governmental entities and market niches, all of which are delivered through nationwide networks of independent agents, and Brown & Brown retail agents; the Wholesale Brokerage Segment markets and sells excess and surplus commercial insurance, primarily through independent agents and brokers, as well as Brown & Brown Retail offices; and the Services Segment provides insurance-related services, including third-party claims administration and comprehensive medical utilization management services in both the workers’ compensation and all-lines liability arenas, as well as Medicare Set-aside services, Social Security disability and Medicare benefits advocacy services, and catastrophe 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 (“NFIP”), the program administered by the Federal Emergency Management Agency (“FEMA”), and several excess flood insurance policies, all of which are fully reinsured.
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, 2014 .
Recently Issued Accounting Pronouncements	Recently Issued Accounting Pronouncements In September 2015, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") No. 2015-16, “Business Combinations (Topic 805): Simplifying the Accounting for Measurement-Period Adjustments” (“ASU 2015-16”), which requires that an acquirer recognize adjustments to provisional amounts that are identified during the measurement period in the reporting period in which the adjustment amounts are determined. ASU 2015-16 is effective for fiscal years, and interim reporting periods within those fiscal years, beginning after December 15, 2015. The Company is currently evaluating the impact of the adoption of this guidance on the Consolidated Financial Statements. In April 2015, FASB issued ASU No. 2015-05, "Intangibles-Goodwill and Other-Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Fees Paid in a Cloud Computing Arrangement" ("ASU 2015-05"), which issues guidance on determining whether a cloud computing arrangement contains a software license that should be accounted for as internal-use software. If a cloud computing arrangement does not contain a software license, it should be accounted for as a service contract. This guidance is effective for fiscal years beginning after December 15, 2015 and for interim periods within those fiscal years, with early adoption permitted. The Company is currently evaluating the impact of the adoption of this guidance on the Consolidated Financial Statements. In April 2015, FASB issued ASU No. 2015-03, "Simplifying the Presentation of Debt Issuance Costs" ("ASU 2015-03"), which requires that debt issuance costs related to a recognized debt liability be presented in the balance sheet as a direct deduction from the carrying amount of that debt liability, consistent with debt discounts, and not recorded as separate assets. This update is effective for reporting periods beginning after December 15, 2015, and is to be applied on a retrospective basis. The Company plans to adopt ASU 2015-03 in the first quarter of 2016. As the Company's debt issuance costs are not material, implementation of this update is not expected to have a material impact on the Company's Consolidated Financial Statements. In August 2014, FASB issued ASU No. 2014-15, “Disclosure of Uncertainties About an Entity’s Ability to Continue as a Going Concern” (“ASU 2014-15”), which addresses management’s responsibility in evaluating whether there is substantial doubt about a company’s ability to continue as a going concern and to provide related footnote disclosures. ASU 2014-15 is effective for fiscal years beginning after December 15, 2016 and for interim periods within those fiscal years, with early adoption permitted. The Company does not expect to early adopt this guidance, and it believes the adoption of this guidance will not have an impact on the Condensed Consolidated Financial Statements.

Net Income Per Share (Tables)

Net Income Per Share (Tables)	9 Months Ended
	Sep. 30, 2015
Earnings Per Share [Abstract]
Reconciliation between Basic and Diluted Weighted Average Shares Outstanding	The following is a reconciliation between basic and diluted weighted average shares outstanding: For the three months For the nine months (in thousands, except per share data) 2015 2014 2015 2014 Net income $ 67,427 $ 68,331 $ 185,383 $ 182,501 Net income attributable to unvested awarded performance stock (1,565 ) (1,681 ) (4,370 ) (4,604 ) Net income attributable to common shares $ 65,862 $ 66,650 $ 181,013 $ 177,897 Weighted average number of common shares outstanding – basic 140,955 144,469 141,517 144,909 Less unvested awarded performance stock included in weighted average number of common shares outstanding – basic (3,271 ) (3,554 ) (3,336 ) (3,656 ) Weighted average number of common shares outstanding for basic earnings per common share 137,684 140,915 138,181 141,253 Dilutive effect of stock options 2,357 2,049 2,265 1,849 Weighted average number of shares outstanding – diluted 140,041 142,964 140,446 143,102 Net income per share: Basic $ 0.48 $ 0.47 $ 1.31 $ 1.26 Diluted $ 0.47 $ 0.47 $ 1.29 $ 1.24

Business Combinations (Tables)

Business Combinations (Tables)	9 Months Ended
	Sep. 30, 2015
Business Combinations [Abstract]
Purchase price allocation for current year acquisitions and adjustments made for prior year acquisitions	The following table summarizes the purchase price allocation made as of the date of each acquisition for current year acquisitions and significant adjustments made during the measurement period for prior year acquisitions: (in thousands) Name Business Segment Effective Date of Acquisition Cash Paid Other Payable Recorded Earn-Out Payable Net Assets Acquired Maximum Potential Earn- Out Payable Liberty Insurance Brokers, Inc. and Affiliates (Liberty) Retail February 1, 2015 $ 12,000 $ — $ 2,981 $ 14,981 $ 3,750 Spain Agency, Inc. Retail March 1, 2015 20,706 — 2,617 23,323 9,162 Bellingham Underwriters, Inc. National Programs May 1, 2015 9,007 500 3,322 12,829 4,400 Fitness Insurance, LLC Retail June 1, 2015 9,455 — 2,386 11,841 3,500 Strategic Benefit Advisors, Inc. Retail June 1, 2015 49,600 400 14,441 64,441 26,000 Other Various Various 9,158 95 3,749 13,002 6,267 Total $ 109,926 $ 995 $ 29,496 $ 140,417 $ 53,079
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. The data included in the ‘Other’ column shows a negative adjustment for purchased customer accounts. This is driven mainly by the final valuation adjustment for the acquisition of Wright. (in thousands) Liberty Spain Agency, Inc. Bellingham Underwriters, Inc. Fitness Insurance, LLC Strategic Benefit Advisors, Inc. Other Total Other current assets $ 2,486 $ — $ — $ — $ — $ 170 $ 2,656 Fixed assets 40 50 25 17 41 32 205 Goodwill 10,010 16,036 9,608 8,084 39,865 17,029 100,632 Purchased customer accounts 4,506 7,430 3,223 3,740 24,500 (4,105 ) 39,294 Non-compete agreements 24 21 21 — 21 123 210 Other assets — — — — 14 — 14 Total assets acquired 17,066 23,537 12,877 11,841 64,441 13,249 143,011 Other current liabilities (42 ) (214 ) (48 ) — — (3,458 ) (3,762 ) Deferred income tax, net — — — — — 2,576 2,576 Other liabilities (2,043 ) — — — — 635 (1,408 ) Total liabilities assumed (2,085 ) (214 ) (48 ) — — (247 ) (2,594 ) Net assets acquired $ 14,981 $ 23,323 $ 12,829 $ 11,841 $ 64,441 $ 13,002 $ 140,417
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 For the nine months (in thousands, except per share data) 2015 2014 2015 2014 Total revenues $ 432,276 $ 431,703 $ 1,267,812 $ 1,212,241 Income before income taxes $ 112,855 $ 115,712 $ 311,429 $ 310,302 Net income $ 67,442 $ 70,166 $ 187,738 $ 187,952 Net income per share: Basic $ 0.48 $ 0.49 $ 1.33 $ 1.30 Diluted $ 0.47 $ 0.48 $ 1.31 $ 1.28 Weighted average number of shares outstanding: Basic 137,684 140,915 138,181 141,253 Diluted 140,041 142,964 140,446 143,102
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 nine months ended September 30, 2015 and 2014 , were as follows: For the three months For the nine months (in thousands) 2015 2014 2015 2014 Balance as of the beginning of the period $ 90,113 $ 52,696 $ 75,283 $ 43,058 Additions to estimated acquisition earn-out payables 2,363 (221 ) 29,496 14,586 Payments for estimated acquisition earn-out payables (12,899 ) (463 ) (26,937 ) (11,892 ) Subtotal 79,577 52,012 77,842 45,752 Net change in earnings from estimated acquisition earn-out payables: Change in fair value on estimated acquisition earn-out payables (365 ) (247 ) (30 ) 4,981 Interest expense accretion 824 561 2,224 1,593 Net change in earnings from estimated acquisition earn-out payables 459 314 2,194 6,574 Balance as of September 30, $ 80,036 $ 52,326 $ 80,036 $ 52,326

Goodwill (Tables)

Goodwill (Tables)	9 Months Ended
	Sep. 30, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Changes in Carrying Value of Goodwill by Operating Segment	The changes in the carrying value of goodwill by reportable segment for the nine months ended September 30, 2015 are as follows: (in thousands) Retail National Programs Wholesale Brokerage Services Total Balance as of January 1, 2015 $ 1,231,869 $ 886,095 $ 222,356 $ 120,291 $ 2,460,611 Goodwill of acquired businesses 78,018 18,009 4,605 — 100,632 Goodwill disposed of relating to sales of businesses — (2,238 ) — — (2,238 ) Balance as of September 30, 2015 $ 1,309,887 $ 901,866 $ 226,961 $ 120,291 $ 2,559,005

Amortizable Intangible Assets (

Amortizable Intangible Assets (Tables)	9 Months Ended
	Sep. 30, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Amortizable Intangible Assets	Amortizable intangible assets at September 30, 2015 and December 31, 2014 consisted of the following: September 30, 2015 December 31, 2014 (in thousands) Gross Carrying Value Accumulated Amortization Net Carrying Value Weighted Average Life (Years)(1) Gross Carrying Value Accumulated Amortization Net Carrying Value Weighted Average Life (Years)(1) Purchased customer accounts $ 1,392,323 $ (636,906 ) $ 755,417 15.0 $ 1,355,550 $ (574,285 ) $ 781,265 14.9 Non-compete agreements 29,345 (26,666 ) 2,679 6.8 29,139 (25,762 ) 3,377 6.8 Total $ 1,421,668 $ (663,572 ) $ 758,096 $ 1,384,689 $ (600,047 ) $ 784,642 (1) Weighted average life calculated as of the date of acquisition.

Long-Term Debt (Tables)

Long-Term Debt (Tables)	9 Months Ended
	Sep. 30, 2015
Debt Disclosure [Abstract]
Long-Term Debt Instrument	Long-term debt at September 30, 2015 and December 31, 2014 consisted of the following: (in thousands) September 30, 2015 December 31, 2014 Current portion of long-term debt: Current portion of 5-year term loan facility expires 2019 $ 41,250 $ 20,625 5.370% senior notes, Series D, quarterly interest payments, balloon due 2015 — 25,000 Total current portion of long-term debt 41,250 45,625 Long-term debt: Note agreements: 5.660% senior notes, Series C, semi-annual interest payments, balloon due 2016 25,000 25,000 4.500% senior notes, Series E, quarterly interest payments, balloon due 2018 100,000 100,000 4.200% senior notes, semi-annual interest payments, balloon due 2024 498,589 498,471 Total notes 623,589 623,471 Credit agreements: 5-year term-loan facility, periodic interest and principal payments, currently LIBOR plus 1.375%, expires May 20, 2019 495,000 529,375 5-year revolving-loan facility, periodic interest payments, currently LIBOR plus 1.175%, plus commitment fees of 0.20%, expires May 20, 2019 — — Revolving credit loan, quarterly interest payments, LIBOR plus up to 1.40% and availability fee up to 0.25%, expires December 31, 2016 — — Total credit agreements 495,000 529,375 Total long-term debt 1,118,589 1,152,846 Current portion of long-term debt 41,250 45,625 Total debt $ 1,159,839 $ 1,198,471

Supplemental Disclosures of C27

Supplemental Disclosures of Cash Flow Information and Non-Cash Financing and Investing Activities (Tables)	9 Months Ended
	Sep. 30, 2015
Supplemental Cash Flow Elements [Abstract]
Summary of Supplemental Disclosures of Cash Flow Information and Non-Cash Financing and Investing Activities	For the nine months (in thousands) 2015 2014 Cash paid during the period for: Interest $ 33,091 $ 19,940 Income taxes $ 96,579 $ 92,018 Brown & Brown’s significant non-cash investing and financing activities are summarized as follows: For the nine months (in thousands) 2015 2014 Other payable issued for purchased customer accounts $ 995 $ 1,623 Estimated acquisition earn-out payables and related charges $ 29,497 $ 12,937 Notes received on the sale of fixed assets and customer accounts $ 544 $ 296

Segment Information (Tables)

Segment Information (Tables)	9 Months Ended
	Sep. 30, 2015
Segment Reporting Information [Line Items]
Segment Information	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 offices; 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 catastrophe claims adjusting services. Brown & Brown conducts all of its operations within the United States of America, except for one wholesale brokerage operation based in London, England, and retail operations in Bermuda and the Cayman Islands. These non-United States operations earned $3.2 million and $3.2 million of total revenues for the three months ended September 30, 2015 and 2014 , respectively. These operations earned $9.3 million and $10.2 million of total revenues for the nine months ended September 30, 2015 and 2014 , respectively. Long-lived assets held outside of the United States as of September 30, 2015 and 2014 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, 2014 . The Company evaluates the performance of its segments based upon revenues and income before income taxes. Inter-segment revenues are eliminated. Summarized financial information concerning the Company’s reportable segments is shown in the following table. The “Other” column includes any income and expenses not allocated to reportable segments and corporate-related items, including the inter-company interest expense charge to the reporting segment. For the three months ended September 30, 2015 (in thousands) Retail National Programs Wholesale Brokerage Services Other Total Total revenues $ 216,249 $ 116,966 $ 61,374 $ 37,980 $ (402 ) $ 432,167 Investment income $ 19 $ 49 $ 3 $ — $ 157 $ 228 Amortization $ 11,552 $ 7,133 $ 2,441 $ 1,022 $ 10 $ 22,158 Depreciation $ 1,632 $ 1,850 $ 506 $ 474 $ 753 $ 5,215 Interest expense $ 10,121 $ 13,398 $ 200 $ 1,527 $ (15,364 ) $ 9,882 Income before income taxes $ 41,785 $ 25,281 $ 22,276 $ 6,022 $ 17,466 $ 112,830 Total assets $ 3,400,407 $ 2,542,619 $ 880,454 $ 296,659 $ (2,117,947 ) $ 5,002,192 Capital expenditures $ 1,637 $ 1,754 $ 425 $ 233 $ 127 $ 4,176 For the three months ended September 30, 2014 (in thousands) Retail National Programs Wholesale Brokerage Services Other Total Total revenues $ 206,504 $ 117,926 $ 61,620 $ 35,492 $ (124 ) $ 421,418 Investment income $ 16 $ 48 $ 9 $ — $ 152 $ 225 Amortization $ 10,920 $ 7,343 $ 2,676 $ 1,034 $ 10 $ 21,983 Depreciation $ 1,632 $ 2,143 $ 640 $ 555 $ 486 $ 5,456 Interest expense $ 10,882 $ 15,915 $ 299 $ 1,937 $ (21,735 ) $ 7,298 Income before income taxes $ 39,823 $ 20,694 $ 21,750 $ 5,145 $ 25,273 $ 112,685 Total assets $ 3,163,014 $ 2,508,815 $ 895,943 $ 285,307 $ (1,907,331 ) $ 4,945,748 Capital expenditures $ 1,320 $ 5,243 $ 492 $ 325 $ 232 $ 7,612 For the nine months ended September 30, 2015 (in thousands) Retail National Programs Wholesale Brokerage Services Other Total Total revenues $ 657,314 $ 319,577 $ 168,619 $ 111,128 $ (726 ) $ 1,255,912 Investment income $ 62 $ 150 $ 148 $ 1 $ 347 $ 708 Amortization $ 33,671 $ 21,343 $ 7,296 $ 3,067 $ 29 $ 65,406 Depreciation $ 4,908 $ 5,372 $ 1,630 $ 1,533 $ 2,192 $ 15,635 Interest expense $ 30,841 $ 42,306 $ 645 $ 4,722 $ (49,110 ) $ 29,404 Income before income taxes $ 137,249 $ 48,567 $ 53,150 $ 16,062 $ 52,494 $ 307,522 Total assets $ 3,400,407 $ 2,542,619 $ 880,454 $ 296,659 $ (2,117,947 ) $ 5,002,192 Capital expenditures $ 4,410 $ 5,004 $ 2,087 $ 774 $ 498 $ 12,773 For the nine months ended September 30, 2014 (in thousands) Retail National Programs Wholesale Brokerage Services Other Total Total revenues $ 626,194 $ 288,087 $ 165,894 $ 102,891 $ (290 ) $ 1,182,776 Investment income $ 48 $ 119 $ 20 $ 2 $ 333 $ 522 Amortization $ 31,812 $ 17,512 $ 8,028 $ 3,101 $ 29 $ 60,482 Depreciation $ 4,850 $ 5,503 $ 1,890 $ 1,646 $ 1,449 $ 15,338 Interest expense $ 33,000 $ 33,803 $ 1,060 $ 5,878 $ (55,367 ) $ 18,374 Income before income taxes $ 129,213 $ 47,640 $ 47,863 $ 12,977 $ 63,610 $ 301,303 Total assets $ 3,163,014 $ 2,508,815 $ 895,943 $ 285,307 $ (1,907,331 ) $ 4,945,748 Capital expenditures $ 5,016 $ 12,369 $ 1,205 $ 860 $ 739 $ 20,189

Investments (Tables)

Investments (Tables)	9 Months Ended
	Sep. 30, 2015
Investments, Debt and Equity Securities [Abstract]
Schedule of Investments in Fixed Maturity Securities	At December 31, 2014 , the Company’s amortized cost and fair values of fixed maturity securities are summarized as follows: (in thousands) Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value U.S. Treasury securities, obligations of U.S. Government agencies and Municipals $ 10,774 $ 7 $ (1 ) $ 10,780 Foreign government 50 — — 50 Corporate debt 5,854 9 (11 ) 5,852 Short duration fixed income fund 3,143 37 3,180 Total $ 19,821 $ 53 $ (12 ) $ 19,862 At September 30, 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 $ 15,640 $ 74 $ — $ 15,714 Foreign government 50 — — 50 Corporate debt 5,280 14 (5 ) 5,289 Short duration fixed income fund 1,860 30 — 1,890 Total $ 22,830 $ 118 $ (5 ) $ 22,943
Summary of Unrealized Loss Position	The following table shows the investments’ gross unrealized loss and fair value, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position as of December 31, 2014 : (in thousands) Less than 12 Months 12 Months or More Total Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses U.S. Treasury securities, obligations of U.S. Government agencies and Municipals $ 3,994 $ 1 $ — $ — $ 3,994 $ 1 Foreign Government 50 — — — 50 — Corporate debt 4,439 11 — — 4,439 11 Total $ 8,483 $ 12 $ — $ — $ 8,483 $ 12 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 September 30, 2015 : (in thousands) Less than 12 Months 12 Months or More Total Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses Corporate debt 1,498 3 485 2 1,983 5 Total $ 1,498 $ 3 $ 485 $ 2 $ 1,983 $ 5
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 September 30, 2015 by contractual maturity are set forth below: (in thousands) Amortized Cost Fair Value Years to maturity: Due in one year or less $ 9,034 $ 9,039 Due after one year through five years 13,466 13,569 Due after five years through ten years 330 335 Total $ 22,830 $ 22,943 The amortized cost and estimated fair value of the fixed maturity securities at December 31, 2014 by contractual maturity are set forth below: (in thousands) Amortized Cost Fair Value Years to maturity: Due in one year or less $ 5,628 $ 5,628 Due after one year through five years 13,863 13,897 Due after five years through ten years 330 337 Total $ 19,821 $ 19,862

Losses and Loss Adjustment Re30

Losses and Loss Adjustment Reserve (Tables)	9 Months Ended
	Sep. 30, 2015
Reinsurance Disclosures [Abstract]
Effects of Reinsurance on Premiums Written and Earned	The effects of reinsurance on premiums written and earned are as follows: (in thousands) Period from January 1, 2015 to Written Earned Direct premiums $ 468,761 $ 459,552 Assumed premiums — 18 Ceded premiums 468,750 459,559 Net premiums $ 11 $ 11

Nature of Operations - Addition

Nature of Operations - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2015Segment
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of reportable segments	4

Net Income Per Share - Reconcil

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		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Earnings Per Share [Abstract]
Net income	$ 67,427	$ 68,331	$ 185,383	$ 182,501
Net income attributable to unvested awarded performance stock	(1,565)	(1,681)	(4,370)	(4,604)
Net income attributable to common shares	$ 65,862	$ 66,650	$ 181,013	$ 177,897
Weighted average number of common shares outstanding - basic (in shares)	140,955	144,469	141,517	144,909
Less unvested awarded performance stock included in weighted average number of common shares outstanding - basic (in shares)	(3,271)	(3,554)	(3,336)	(3,656)
Weighted average number of common shares outstanding for basic earnings per common share (in shares)	137,684	140,915	138,181	141,253
Dilutive effect of stock options (in shares)	2,357	2,049	2,265	1,849
Weighted average number of shares outstanding - diluted (in shares)	140,041	142,964	140,446	143,102
Basic (in dollars per share)	$ 0.48	$ 0.47	$ 1.31	$ 1.26
Diluted (in dollars per share)	$ 0.47	$ 0.47	$ 1.29	$ 1.24

Business Combinations - Additio

Business Combinations - Additional Information (Detail)	3 Months Ended	9 Months Ended
	Sep. 30, 2015USD ($)	Sep. 30, 2015USD ($)acquisitioncustomer_account	Sep. 30, 2014USD ($)acquisition	Jul. 01, 2015USD ($)	Jan. 01, 2015USD ($)	Jul. 01, 2014USD ($)	Jan. 01, 2014USD ($)
Business Acquisition [Line Items]
Number of acquisitions | acquisition		9	6
Number of customer accounts acquired | customer_account		4
Aggregate purchase price of acquisitions		$ 503,442
Payments to Acquire Businesses, Gross		109,926,000	$ 720,100,000
Goodwill assigned	$ 100,632,000	100,632,000
Goodwill currently deductible for income tax purposes	62,735,000	62,735,000
Goodwill currently non-deductible for income tax purposes	8,401,000	8,401,000
Goodwill related to the recorded earn-out payables	29,496,000	29,496,000
Total revenues related to acquisitions	9,218,000	16,640,000
Income before income taxes related to acquisitions	397,000	1,243,000
Estimated acquisition earn-out payables	80,036,000	80,036,000	$ 52,326,000	$ 90,113,000	$ 75,283,000	$ 52,696,000	$ 43,058,000
Accounts payable
Business Acquisition [Line Items]
Estimated acquisition earn-out payables	32,300,000	$ 32,300,000
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
Retail
Business Acquisition [Line Items]
Goodwill assigned	78,018,000	$ 78,018,000
National Programs
Business Acquisition [Line Items]
Goodwill assigned	18,009,000	18,009,000
Wholesale Brokerage
Business Acquisition [Line Items]
Goodwill assigned	4,605,000	4,605,000
Other non-current liability
Business Acquisition [Line Items]
Estimated acquisition earn-out payables	$ 47,700,000	$ 47,700,000

Business Combinations - Acquisi

Business Combinations - Acquisitions Accounted for Business Combinations (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Business Combination, Separately Recognized Transactions [Line Items]
Cash Paid	$ 109,926	$ 720,100
Other Payable	995
Recorded Earn-Out Payable	29,496
Net Assets Acquired	140,417
Maximum Potential Earn- Out Payable	53,079
Liberty Insurance Brokers, Inc. and Affiliates (Liberty)
Business Combination, Separately Recognized Transactions [Line Items]
Net Assets Acquired	$ 14,981
Liberty Insurance Brokers, Inc. and Affiliates (Liberty) | Retail
Business Combination, Separately Recognized Transactions [Line Items]
Effective Date of Acquisition	Feb. 1, 2015
Cash Paid	$ 12,000
Other Payable	0
Recorded Earn-Out Payable	2,981
Net Assets Acquired	14,981
Maximum Potential Earn- Out Payable	3,750
Spain Agency, Inc.
Business Combination, Separately Recognized Transactions [Line Items]
Net Assets Acquired	$ 23,323
Spain Agency, Inc. | Retail
Business Combination, Separately Recognized Transactions [Line Items]
Effective Date of Acquisition	Mar. 1, 2015
Cash Paid	$ 20,706
Other Payable	0
Recorded Earn-Out Payable	2,617
Net Assets Acquired	23,323
Maximum Potential Earn- Out Payable	9,162
Bellingham Underwriters, Inc. [Member]
Business Combination, Separately Recognized Transactions [Line Items]
Net Assets Acquired	$ 12,829
Bellingham Underwriters, Inc. [Member] | National Programs
Business Combination, Separately Recognized Transactions [Line Items]
Effective Date of Acquisition	May 1, 2015
Bellingham Underwriters, Inc. [Member] | National Programs Divisions [Member]
Business Combination, Separately Recognized Transactions [Line Items]
Cash Paid	$ 9,007
Other Payable	500
Recorded Earn-Out Payable	3,322
Net Assets Acquired	12,829
Maximum Potential Earn- Out Payable	4,400
Fitness Insurance, LLC [Member]
Business Combination, Separately Recognized Transactions [Line Items]
Net Assets Acquired	$ 11,841
Fitness Insurance, LLC [Member] | Retail
Business Combination, Separately Recognized Transactions [Line Items]
Effective Date of Acquisition	Jun. 1, 2015
Cash Paid	$ 9,455
Other Payable	0
Recorded Earn-Out Payable	2,386
Net Assets Acquired	11,841
Maximum Potential Earn- Out Payable	3,500
Other
Business Combination, Separately Recognized Transactions [Line Items]
Net Assets Acquired	64,441
Other | Retail
Business Combination, Separately Recognized Transactions [Line Items]
Cash Paid	49,600
Other Payable	400
Recorded Earn-Out Payable	14,441
Net Assets Acquired	64,441
Maximum Potential Earn- Out Payable	$ 26,000
Other | Wholesale Brokerage
Business Combination, Separately Recognized Transactions [Line Items]
Effective Date of Acquisition	Jun. 1, 2015
Other Acquisitions [Member]
Business Combination, Separately Recognized Transactions [Line Items]
Net Assets Acquired	$ 13,002
Other Acquisitions [Member] | Various
Business Combination, Separately Recognized Transactions [Line Items]
Cash Paid	9,158
Other Payable	95
Recorded Earn-Out Payable	3,749
Net Assets Acquired	13,002
Maximum Potential Earn- Out Payable	$ 6,267

Business Combinations - Estimat

Business Combinations - Estimated Fair Values of Aggregate Assets and Liabilities Acquired (Detail) - USD ($)	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Fair Value Of Assets And Liabilities Statement [Line Items]
Payments to Acquire Businesses, Gross	$ 109,926,000	$ 720,100,000
Recorded Earn-Out Payable	29,496,000
Other current assets	2,656,000
Fixed assets	205,000
Goodwill	100,632,000
Purchased customer accounts	39,294,000
Non-compete agreements	210,000
Business Acquisitions Purchase Price Allocation Other Noncurrent Assets	14,000
Total assets acquired	143,011,000
Other current liabilities	(3,762,000)
Deferred Tax Liabilities, Net	2,576,000
Other liabilities	(1,408,000)
Total liabilities assumed	(2,594,000)
Net assets acquired	140,417,000
Maximum Potential Earn- Out Payable	53,079,000
Liberty Insurance Brokers, Inc. and Affiliates (Liberty)
Fair Value Of Assets And Liabilities Statement [Line Items]
Other current assets	2,486,000
Fixed assets	40,000
Goodwill	10,010,000
Purchased customer accounts	4,506,000
Non-compete agreements	24,000
Business Acquisitions Purchase Price Allocation Other Noncurrent Assets	0
Total assets acquired	17,066,000
Other current liabilities	(42,000)
Deferred Tax Liabilities, Net	0
Other liabilities	(2,043,000)
Total liabilities assumed	(2,085,000)
Net assets acquired	14,981,000
Spain Agency, Inc.
Fair Value Of Assets And Liabilities Statement [Line Items]
Other current assets	0
Fixed assets	50,000
Goodwill	16,036,000
Purchased customer accounts	7,430,000
Non-compete agreements	21,000
Business Acquisitions Purchase Price Allocation Other Noncurrent Assets	0
Total assets acquired	23,537,000
Other current liabilities	(214,000)
Deferred Tax Liabilities, Net	0
Other liabilities	0
Total liabilities assumed	(214,000)
Net assets acquired	23,323,000
Bellingham Underwriters, Inc. [Member]
Fair Value Of Assets And Liabilities Statement [Line Items]
Other current assets	0
Fixed assets	25,000
Goodwill	9,608,000
Purchased customer accounts	3,223,000
Non-compete agreements	21,000
Business Acquisitions Purchase Price Allocation Other Noncurrent Assets	0
Total assets acquired	12,877,000
Other current liabilities	(48,000)
Deferred Tax Liabilities, Net	0
Other liabilities	0
Total liabilities assumed	(48,000)
Net assets acquired	12,829,000
Fitness Insurance, LLC [Member]
Fair Value Of Assets And Liabilities Statement [Line Items]
Other current assets	0
Fixed assets	17,000
Goodwill	8,084,000
Purchased customer accounts	3,740,000
Non-compete agreements	0
Business Acquisitions Purchase Price Allocation Other Noncurrent Assets	0
Total assets acquired	11,841,000
Other current liabilities	0
Deferred Tax Liabilities, Net	0
Other liabilities	0
Total liabilities assumed	0
Net assets acquired	11,841,000
Other
Fair Value Of Assets And Liabilities Statement [Line Items]
Other current assets	0
Fixed assets	41,000
Goodwill	39,865,000
Purchased customer accounts	24,500,000
Non-compete agreements	21,000
Business Acquisitions Purchase Price Allocation Other Noncurrent Assets	14,000
Total assets acquired	64,441,000
Other current liabilities	0
Deferred Tax Liabilities, Net	0
Other liabilities	0
Total liabilities assumed	0
Net assets acquired	64,441,000
Other Acquisitions [Member]
Fair Value Of Assets And Liabilities Statement [Line Items]
Other current assets	170,000
Fixed assets	32,000
Goodwill	17,029,000
Purchased customer accounts	(4,105,000)
Non-compete agreements	123,000
Business Acquisitions Purchase Price Allocation Other Noncurrent Assets	0
Total assets acquired	13,249,000
Other current liabilities	(3,458,000)
Deferred Tax Liabilities, Net	2,576,000
Other liabilities	635,000
Total liabilities assumed	(247,000)
Net assets acquired	13,002,000
Wholesale Brokerage
Fair Value Of Assets And Liabilities Statement [Line Items]
Goodwill	$ 4,605,000
Wholesale Brokerage | Other
Fair Value Of Assets And Liabilities Statement [Line Items]
Effective Date of Acquisition	Jun. 1, 2015

Business Combinations - Results

Business Combinations - Results of Operations (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual	$ 9,218		$ 16,640
Business Combination Pro Forma Information Income Loss Before Income Taxes Of Acquiree Since Acquisition Date Actual	397		1,243
Total revenues	432,276	$ 431,703	1,267,812	$ 1,212,241
Income before income taxes	112,855	115,712	311,429	310,302
Net income	$ 67,442	$ 70,166	$ 187,738	$ 187,952
Net income per share:
Basic (in dollars per share)	$ 0.48	$ 0.49	$ 1.33	$ 1.30
Diluted (in dollars per share)	$ 0.47	$ 0.48	$ 1.31	$ 1.28
Weighted Average Basic Shares Outstanding, Pro Forma	137,684	140,915	138,181	141,253
Weighted average number of shares outstanding:
Pro Forma Weighted Average Shares Outstanding, Diluted	140,041	142,964	140,446	143,102

Business Combinations - Addit37

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		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Business Combinations [Abstract]
Additions to estimated acquisition earn-out payables	$ 2,363	$ (221)	$ 29,496	$ 14,586
Payments for estimated acquisition earn-out payables	(12,899)	(463)	(26,937)	(11,892)
Subtotal	79,577	52,012	77,842	45,752
Net change in earnings from estimated acquisition earn-out payables:
Change in fair value on estimated acquisition earn-out payables	365	247	(30)	4,981
Interest expense accretion	824	561	2,224	1,593
Net change in earnings from estimated acquisition earn-out payables	459	314	2,194	6,574
Ending balance	$ 80,036	$ 52,326	$ 80,036	$ 52,326

Goodwill - Changes in Carrying

Goodwill - Changes in Carrying Value of Goodwill by Operating Segment (Detail) $ in Thousands	9 Months Ended
	Sep. 30, 2015USD ($)
Goodwill [Roll Forward]
Beginning balance	$ 2,460,611
Goodwill of acquired businesses	100,632
Goodwill disposed of relating to sales of businesses	(2,238)
Ending balance	2,559,005
Retail
Goodwill [Roll Forward]
Beginning balance	1,231,869
Goodwill of acquired businesses	78,018
Goodwill disposed of relating to sales of businesses	0
Ending balance	1,309,887
National Programs
Goodwill [Roll Forward]
Beginning balance	886,095
Goodwill of acquired businesses	18,009
Goodwill disposed of relating to sales of businesses	(2,238)
Ending balance	901,866
Wholesale Brokerage
Goodwill [Roll Forward]
Beginning balance	222,356
Goodwill of acquired businesses	4,605
Goodwill disposed of relating to sales of businesses	0
Ending balance	226,961
Services
Goodwill [Roll Forward]
Beginning balance	120,291
Goodwill of acquired businesses	0
Goodwill disposed of relating to sales of businesses	0
Ending balance	$ 120,291

Amortizable Intangible Assets -

Amortizable Intangible Assets - Amortizable Intangible Assets (Detail) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2015	Dec. 31, 2014
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	$ 1,421,668	$ 1,384,689
Accumulated Amortization	(663,572)	(600,047)
Net Carrying Value	758,096	784,642
Purchased customer accounts
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	1,392,323	1,355,550
Accumulated Amortization	(636,906)	(574,285)
Net Carrying Value	$ 755,417	$ 781,265
Weighted Average Life (Years)	15 years	14 years 10 months 24 days
Non-compete agreements
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	$ 29,345	$ 29,139
Accumulated Amortization	(26,666)	(25,762)
Net Carrying Value	$ 2,679	$ 3,377
Weighted Average Life (Years)	6 years 9 months 18 days	6 years 9 months 18 days

Amortizable Intangible Assets40

Amortizable Intangible Assets - Additional Information (Detail) $ in Millions	Sep. 30, 2015USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization expense estimated, year one (2015)	$ 87.5
Amortization expense estimated, year two (2016)	84
Amortization expense estimated, year three (2017)	81.1
Amortization expense estimated, year four (2018)	75.9
Amortization expense estimated, year five (2019)	$ 71.4

Long-Term Debt - Long-Term Debt

Long-Term Debt - Long-Term Debt Instrument (Detail) - USD ($)	Sep. 30, 2015	Jan. 15, 2015	Dec. 31, 2014	Apr. 16, 2014
Debt Instrument [Line Items]
Total current portion of long-term debt	$ 41,250,000		$ 45,625,000
Total notes	623,589,000		623,471,000
Long-term credit agreements	495,000,000		529,375,000	$ 25,000,000
Total long-term debt	1,118,589,000		1,152,846,000
Current portion of long-term debt	41,250,000		45,625,000
Total debt	1,159,839,000		1,198,471,000
5.370% senior notes, Series D, quarterly interest payments, balloon due 2015
Debt Instrument [Line Items]
Current portion of senior notes	0	$ 25,000,000	25,000,000
5.660% senior notes, Series C, semi-annual interest payments, balloon due 2016
Debt Instrument [Line Items]
Total notes	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	498,589,000		498,471,000
5-year term-loan facility, periodic interest and principal payments, currently LIBOR plus 1.375%, expires May 20, 2019
Debt Instrument [Line Items]
Current portion of loan facility	41,250,000		20,625,000
Long-term credit agreements	495,000,000		529,375,000
5-year revolving-loan facility, periodic interest payments, currently LIBOR plus 1.175%, plus commitment fees of 0.20%, expires May 20, 2019
Debt Instrument [Line Items]
Long-term credit agreements	0		0
Revolving credit loan, quarterly interest payments, LIBOR plus up to 1.40% and availability fee up to 0.25%, expires December 31, 2016
Debt Instrument [Line Items]
Long-term credit agreements	$ 0		$ 0

Long-Term Debt - Long-Term De42

Long-Term Debt - Long-Term Debt Instrument (Additional Information) (Detail)	9 Months Ended	12 Months Ended
	Sep. 30, 2015	Dec. 31, 2014
5.370% senior notes, Series D, quarterly interest payments, balloon due 2015
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage	5.37%	5.37%
Debt instrument maturity year	2,015	2,015
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	2,016	2,016
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	2,018	2,018
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	2,024	2,024
5-year term-loan facility, periodic interest and principal payments, currently LIBOR plus 1.375%, expires May 20, 2019
Debt Instrument [Line Items]
Line of credit facility, expiration period	5 years	5 years
Line of credit facility, expiration date	May 20, 2019	May 20, 2019
5-year term-loan facility, periodic interest and principal payments, currently LIBOR plus 1.375%, expires May 20, 2019 | LIBOR
Debt Instrument [Line Items]
Debt instrument, variable interest rate	1.375%	1.375%
5-year revolving-loan facility, periodic interest payments, currently LIBOR plus 1.175%, plus commitment fees of 0.20%, expires May 20, 2019
Debt Instrument [Line Items]
Line of credit facility, expiration period	5 years	5 years
Line of credit facility, commitment fee percentage	0.20%	0.20%
Line of credit facility, expiration date	May 20, 2019	May 20, 2019
5-year revolving-loan facility, periodic interest payments, currently LIBOR plus 1.175%, plus commitment fees of 0.20%, expires May 20, 2019 | LIBOR
Debt Instrument [Line Items]
Debt instrument, variable interest rate	1.175%	1.175%
Revolving credit loan, quarterly interest payments, LIBOR plus up to 1.40% and availability fee up to 0.25%, expires December 31, 2016
Debt Instrument [Line Items]
Line of credit facility, expiration date	Dec. 31, 2016	Dec. 31, 2016
Maximum | Revolving credit loan, quarterly interest payments, LIBOR plus up to 1.40% and availability fee up to 0.25%, expires December 31, 2016
Debt Instrument [Line Items]
Line of credit facility, commitment fee percentage	0.25%	0.25%
Maximum | Revolving credit loan, quarterly interest payments, LIBOR plus up to 1.40% and availability fee up to 0.25%, expires December 31, 2016 | LIBOR
Debt Instrument [Line Items]
Debt instrument, variable interest rate	1.40%	1.40%

Long-Term Debt - Narrative (Det

Long-Term Debt - Narrative (Detail)

Sep. 18, 2014USD ($)

May 20, 2014USD ($)extension

Oct. 12, 2012USD ($)

Sep. 30, 2015USD ($)

Sep. 30, 2014USD ($)

Dec. 31, 2014USD ($)

Jan. 15, 2015USD ($)

Apr. 17, 2014USD ($)

Apr. 16, 2014USD ($)

Apr. 15, 2014USD ($)

Jul. 01, 2013USD ($)

Sep. 15, 2011USD ($)

Feb. 01, 2008USD ($)

Dec. 22, 2006USD ($)

Debt Instrument [Line Items]

Credit facility, outstanding amount

$ 495,000,000

$ 529,375,000

$ 25,000,000

Revolving and term loan

50,000,000

Potential increased in line of credit facility

$ 500,000,000

Unsecured revolving credit facility

800,000,000

Unsecured term loans

550,000,000

Proceeds from lines of credit

0

$ 475,000,000

Outstanding debt balance

$ 1,159,839,000

$ 1,198,471,000

5.370% senior notes, Series D, quarterly interest payments, balloon due 2015

Debt Instrument [Line Items]

Debt instrument interest rate stated percentage

5.37%

5.37%

Current portion of senior notes

$ 0

$ 25,000,000

$ 25,000,000

Debt instrument maturity year

2,015

2,015

Credit Agreement

Debt Instrument [Line Items]

Credit facility, outstanding amount

$ 536,300,000

$ 550,000,000

Number of extension periods | extension

2

Extension period

1 year

Unsecured revolving credit facility

$ 1,350,000,000

First principal payment

6,900,000

Unsecured Senior Notes

Debt Instrument [Line Items]

Debt instrument interest rate stated percentage

4.20%

Debt instrument, face amount

$ 500,000,000

Debt instrument maturity year

2,024

Outstanding debt balance

$ 500,000,000

500,000,000

Wells Fargo Revolver

Debt Instrument [Line Items]

Debt instrument, maturity date

Dec. 31, 2016

Potential increased in line of credit facility

$ 75,000,000

Borrowings outstanding

$ 0

0

Wells Fargo Revolver | Beecher Acquisition

Debt Instrument [Line Items]

Credit facility, outstanding amount

$ 50,000,000

$ 50,000,000

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%

Term Loan

Debt Instrument [Line Items]

Credit facility, outstanding amount

$ 550,000,000

Revolving Credit Facility

Debt Instrument [Line Items]

Credit facility, outstanding amount

$ 475,000,000

$ 375,000,000

Proceeds from lines of credit

$ 0

0

Uncommitted Facility | New Master Agreement

Debt Instrument [Line Items]

Credit facility, outstanding amount

$ 0

$ 0

Potential increased in line of credit facility

$ 125,000,000

Issuance period

3 years

Maturity period

10 years

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

$ 25,000,000

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

Debt instrument interest rate stated percentage

4.50%

LIBOR

Debt Instrument [Line Items]

30-day Adjusted LIBOR Rate

0.25%

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 C44

Supplemental Disclosures of Cash Flow Information and Non-Cash Financing and Investing Activities - Significant Non-Cash Investing and Financing Activities (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Cash paid during the period for:
Interest	$ 33,091	$ 19,940
Income taxes	96,579	92,018
Significant non-cash investing and financing activities
Other payable issued for purchased customer accounts	995	1,623
Estimated acquisition earn-out payables and related charges	29,497	12,937
Notes received on the sale of fixed assets and customer accounts	$ 544	$ 296

Segment Information - Additiona

Segment Information - Additional Information (Detail) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015USD ($)	Sep. 30, 2014USD ($)	Sep. 30, 2015USD ($)Segment	Sep. 30, 2014USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments | Segment			4
Total revenues	$ 432,167	$ 421,418	$ 1,255,912	$ 1,182,776
London, Bermuda and Cayman Islands
Segment Reporting Information [Line Items]
Total revenues	$ 3,200	$ 3,200	$ 9,300	$ 10,200

Segment Information - Summarize

Segment Information - Summarized Financial Information Reportable Segments (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Segment Reporting Information [Line Items]
Total revenues	$ 432,167	$ 421,418	$ 1,255,912	$ 1,182,776
Investment income	228	225	708	522
Amortization	22,158	21,983	65,406	60,482
Depreciation	5,215	5,456	15,635	15,338
Interest expense	9,882	7,298	29,404	18,374
Income before income taxes	112,830	112,685	307,522	301,303
Total assets	5,002,192	4,945,748	5,002,192	4,945,748	$ 4,956,458
Capital expenditures	4,176	7,612	12,773	20,189
Operating Segments | Retail
Segment Reporting Information [Line Items]
Total revenues	216,249	206,504	657,314	626,194
Investment income	19	16	62	48
Amortization	11,552	10,920	33,671	31,812
Depreciation	1,632	1,632	4,908	4,850
Interest expense	10,121	10,882	30,841	33,000
Income before income taxes	41,785	39,823	137,249	129,213
Total assets	3,400,407	3,163,014	3,400,407	3,163,014
Capital expenditures	1,637	1,320	4,410	5,016
Operating Segments | National Programs
Segment Reporting Information [Line Items]
Total revenues	116,966	117,926	319,577	288,087
Investment income	49	48	150	119
Amortization	7,133	7,343	21,343	17,512
Depreciation	1,850	2,143	5,372	5,503
Interest expense	13,398	15,915	42,306	33,803
Income before income taxes	25,281	20,694	48,567	47,640
Total assets	2,542,619	2,508,815	2,542,619	2,508,815
Capital expenditures	1,754	5,243	5,004	12,369
Operating Segments | Wholesale Brokerage
Segment Reporting Information [Line Items]
Total revenues	61,374	61,620	168,619	165,894
Investment income	3	9	148	20
Amortization	2,441	2,676	7,296	8,028
Depreciation	506	640	1,630	1,890
Interest expense	200	299	645	1,060
Income before income taxes	22,276	21,750	53,150	47,863
Total assets	880,454	895,943	880,454	895,943
Capital expenditures	425	492	2,087	1,205
Operating Segments | Services
Segment Reporting Information [Line Items]
Total revenues	37,980	35,492	111,128	102,891
Investment income	0	0	1	2
Amortization	1,022	1,034	3,067	3,101
Depreciation	474	555	1,533	1,646
Interest expense	1,527	1,937	4,722	5,878
Income before income taxes	6,022	5,145	16,062	12,977
Total assets	296,659	285,307	296,659	285,307
Capital expenditures	233	325	774	860
Other
Segment Reporting Information [Line Items]
Total revenues	(402)	(124)	(726)	(290)
Investment income	157	152	347	333
Amortization	10	10	29	29
Depreciation	753	486	2,192	1,449
Interest expense	(15,364)	(21,735)	(49,110)	(55,367)
Income before income taxes	17,466	25,273	52,494	63,610
Total assets	(2,117,947)	(1,907,331)	(2,117,947)	(1,907,331)
Capital expenditures	$ 127	$ 232	$ 498	$ 739

Investments - Schedule of Inves

Investments - Schedule of Investments in Fixed Maturity Securities (Detail) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Schedule of Available-for-sale Securities [Line Items]
Cost	$ 22,830	$ 19,821
Gross Unrealized Gains	118	53
Gross Unrealized Losses	(5)	(12)
Fair Value	22,943	19,862
U.S. Treasury securities, obligations of U.S. Government agencies and Municipals
Schedule of Available-for-sale Securities [Line Items]
Cost	15,640	10,774
Gross Unrealized Gains	74	7
Gross Unrealized Losses	0	(1)
Fair Value	15,714	10,780
Foreign government
Schedule of Available-for-sale Securities [Line Items]
Cost	50	50
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Fair Value	50	50
Corporate debt
Schedule of Available-for-sale Securities [Line Items]
Cost	5,280	5,854
Gross Unrealized Gains	14	9
Gross Unrealized Losses	(5)	(11)
Fair Value	5,289	5,852
Short duration fixed income fund
Schedule of Available-for-sale Securities [Line Items]
Cost	1,860	3,143
Gross Unrealized Gains	30	37
Gross Unrealized Losses	0
Fair Value	$ 1,890	$ 3,180

Investments - Summary of Unreal

Investments - Summary of Unrealized Loss Position (Detail) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Schedule of Available-for-sale Securities [Line Items]
Fair Value, Less than 12 Months	$ 1,498	$ 8,483
Unrealized Losses, Less than 12 Months	3	12
Fair Value, 12 Months or More	485	0
Unrealized Losses, 12 Months or More	2	0
Fair Value	1,983	8,483
Unrealized Losses	5	12
U.S. Treasury securities, obligations of U.S. Government agencies and Municipals
Schedule of Available-for-sale Securities [Line Items]
Fair Value, Less than 12 Months		3,994
Unrealized Losses, Less than 12 Months		1
Fair Value, 12 Months or More		0
Unrealized Losses, 12 Months or More		0
Fair Value		3,994
Unrealized Losses		1
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	1,498	4,439
Unrealized Losses, Less than 12 Months	3	11
Fair Value, 12 Months or More	485	0
Unrealized Losses, 12 Months or More	2	0
Fair Value	1,983	4,439
Unrealized Losses	$ 5	$ 11

Investments - Additional Inform

Investments - Additional Information (Detail) $ in Millions	9 Months Ended
	Sep. 30, 2015USD ($)Securities	Dec. 31, 2014Securities
Investments, Debt and Equity Securities [Abstract]
Number of securities in unrealized loss position | Securities	15	38
Proceeds from sale of investment in fixed maturity securities	$ 2.2
Investment security maturity date, start	Jan. 1, 2015
Investment security maturity date, End	Sep. 30, 2015
Gross realized gains and losses of securities	insignificant
Investments on deposit with the state insurance department	$ 4

Investments - Amortized Cost an

Investments - Amortized Cost and Fair Value of Fixed Maturity Securities by Contractual Maturity (Detail) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Amortized Cost
Due in one year or less	$ 9,034	$ 5,628
Due after one year through five years	13,466	13,863
Due after five years through ten years	330	330
Amortized Cost, Total	22,830	19,821
Fair Value
Due in one year or less	9,039	5,628
Due after one year through five years	13,569	13,897
Due after five years through ten years	335	337
Fair Value, Total	$ 22,943	$ 19,862

Losses and Loss Adjustment Re51

Losses and Loss Adjustment Reserve - Effects of Reinsurance on Premiums Written and Earned (Detail) $ in Thousands	9 Months Ended
	Sep. 30, 2015USD ($)
Written
Direct premiums	$ 468,761
Assumed premiums	0
Ceded premiums	468,750
Net premiums	11
Earned
Direct premiums	459,552
Assumed premiums	18
Ceded premiums	459,559
Net premiums	$ 11

Losses and Loss Adjustment Re52

Losses and Loss Adjustment Reserve - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2015USD ($)Reinsurer	Dec. 31, 2014USD ($)
Reinsurance Premiums for Insurance Companies, by Product Segment [Line Items]
Ceded rate of premiums under insurance program	100.00%
Premiums written net	$ 468,750,000
Ceded unpaid loss	37,200,000
The reinsurance recoverable	367,000,000
Prepaid reinsurance premiums	329,777,000	$ 320,586,000
Increase (Decrease) in Liability for Claims and Claims Adjustment Expense Reserve	0
Reserve for losses and loss adjustment expense	$ 37,200,000
Number of reinsurers | Reinsurer	3
Homeowners
Reinsurance Premiums for Insurance Companies, by Product Segment [Line Items]
Ceded unpaid loss	$ 8,698
Reinsurance recoverable, incurred but not reported claims	102
Private Passenger Auto Liability
Reinsurance Premiums for Insurance Companies, by Product Segment [Line Items]
Ceded unpaid loss	48,254
Reinsurance recoverable, incurred but not reported claims	39,424
Other Liability
Reinsurance Premiums for Insurance Companies, by Product Segment [Line Items]
Ceded unpaid loss	$ 756
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	30.80%
Premiums written net	$ 467,800,000
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	$ 900,000

Statutory Financial Informati53

Statutory Financial Information - Additional Information (Detail) - Wright Flood	9 Months Ended
	Sep. 30, 2015USD ($)
Statutory Accounting Practices [Line Items]
Statutory capital and surplus required	$ 7,500,000
Statutory capital and surplus	14,200,000
Statutory net Income	$ 3,200,000

Subsidiary Dividend Restricti54

Subsidiary Dividend Restrictions - Additional Information (Detail) - Wright Flood - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2015	Dec. 31, 2015
Dividend Restrictions [Line Items]
Dividend rate as a percentage of net income	100.00%
Ordinary dividends payment description	The maximum amount of ordinary dividends that Wright Flood can pay to shareholders in a rolling twelve month period is limited to the greater of 10% of statutory adjusted capital and surplus as shown on Wright Flood’s last annual statement on file with the superintendent or 100% of adjusted net income.
Scenario, Forecast
Dividend Restrictions [Line Items]
Maximum dividend payout that may be made without prior approval		$ 2.3
Maximum
Dividend Restrictions [Line Items]
Dividend rate as a percentage of net income	10.00%

Shareholders' Equity - Addition

Shareholders' Equity - Additional Information (Detail) - USD ($)	Sep. 02, 2014	Jun. 30, 2015	Sep. 30, 2015	Aug. 11, 2015	Mar. 05, 2015	Dec. 31, 2014	Jul. 21, 2014	Jun. 30, 2014
Accelerated Share Repurchases [Line Items]
Shares repurchased, authorized amount								$ 25,000,000
Total number of shares repurchased (in shares)		5,444,389
Shares repurchased, number of shares received initially (in shares)			5,444,000	3,059,629		2,385,000
Fair value of common stock repurchased			$ 175,025,000			$ 75,025,000
Maximum
Accelerated Share Repurchases [Line Items]
Shares repurchased, authorized amount							$ 200,000,000
Accelerated Share Repurchase Agreement
Accelerated Share Repurchases [Line Items]
Shares repurchased, aggregate repurchase amount	$ 50,000,000
Total number of shares repurchased (in shares)	1,539,760
Second Accelerated Share Repurchase Agreement
Accelerated Share Repurchases [Line Items]
Shares repurchased, aggregate repurchase amount					$ 100,000,000
Shares repurchased, number of shares received initially (in shares)				391,637	2,667,992
Fair value of common stock repurchased					$ 85,000,000