Brown & Brown (BRO) 10-Q/A 18 Aug 17 2016 Q3 Quarterly report (amended) Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2016	Nov. 04, 2016
Document And Entity Information [Abstract]
Document Type	10-Q/A
Amendment Flag	true
Amendment Description	Updated XBRL
Document Period End Date	Sep. 30, 2016
Document Fiscal Year Focus	2,016
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		140,209,157

CONDENSED CONSOLIDATED STATEMEN

CONDENSED CONSOLIDATED STATEMENTS OF INCOME (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
REVENUES
Commissions and fees	$ 461,652	$ 431,863	$ 1,329,649	$ 1,252,888
Investment income	230	228	1,150	708
Other income, net	392	76	2,166	2,316
Total revenues	462,274	432,167	1,332,965	1,255,912
EXPENSES
Employee compensation and benefits	237,653	216,156	692,814	645,419
Other operating expenses	67,433	66,121	197,329	191,591
Gain on disposal	(277)	(654)	(3,131)	(1,259)
Amortization	21,805	22,158	65,025	65,406
Depreciation	5,195	5,215	15,867	15,635
Interest	9,883	9,882	29,617	29,404
Change in estimated acquisition earn-out payables	3,610	459	6,846	2,194
Total expenses	345,302	319,337	1,004,367	948,390
Income before income taxes	116,972	112,830	328,598	307,522
Income taxes	45,427	45,403	128,733	122,139
Net income	$ 71,545	$ 67,427	$ 199,865	$ 185,383
Net income per share:
Basic (in dollars per share)	$ 0.51	$ 0.48	$ 1.43	$ 1.31
Diluted (in dollars per share)	0.50	0.47	1.41	1.29
Dividends declared per share (in dollars per share)	$ 0.1225	$ 0.11	$ 0.3675	$ 0.33

CONDENSED CONSOLIDATED BALANCE

CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Current Assets:
Cash and cash equivalents	$ 488,683	$ 443,420
Restricted cash and investments	278,279	229,753
Short-term investments	13,287	13,734
Premiums, commissions and fees receivable	469,452	433,885
Reinsurance recoverable	332,004	31,968
Prepaid reinsurance premiums	333,967	309,643
Deferred income taxes	16,961	24,635
Other current assets	42,041	50,351
Total current assets	1,974,674	1,537,389
Fixed assets, net	77,771	81,753
Goodwill	2,672,365	2,586,683
Amortizable intangible assets, net	726,140	744,680
Investments	26,307	18,092
Other assets	44,770	35,882
Total assets	5,522,027	5,004,479
Current Liabilities:
Premiums payable to insurance companies	619,149	574,736
Losses and loss adjustment reserve	332,004	31,968
Unearned premiums	333,967	309,643
Premium deposits and credits due customers	111,012	83,098
Accounts payable	53,911	63,910
Accrued expenses and other liabilities	171,200	192,067
Current portion of long-term debt	80,492	73,125
Total current liabilities	1,701,735	1,328,547
Long-term debt less unamortized discount and debt issuance costs	1,031,693	1,071,618
Deferred income taxes, net	376,658	360,949
Other liabilities	87,169	93,589
Shareholders’ Equity:
Common stock, par value $0.10 per share; authorized 280,000 shares; issued 147,694 shares and outstanding 139,900 shares at 2016, issued 146,415 shares and outstanding 138,985 shares at 2015	14,811	14,642
Additional paid-in capital	464,028	426,498
Treasury stock, at cost 7,794 and 7,430 shares at 2016 and 2015, respectively	(250,025)	(238,775)
Retained earnings	2,095,958	1,947,411
Total shareholders’ equity	2,324,772	2,149,776
Total liabilities and shareholders’ equity	$ 5,522,027	$ 5,004,479

CONDENSED CONSOLIDATED BALANCE4

CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED) (Parenthetical) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Common stock, par value (in dollars per share)	$ 0.10		$ 0.10
Common stock, shares authorized (in shares)	280,000,000		280,000,000
Common stock, shares issued (in shares)	148,110,121		146,415,428
Common stock, shares outstanding (in shares)	140,316,542		138,985,058
Treasury stock shares (in shares)	7,793,579		7,430,370
Tax effect of accumulated other comprehensive income	$ 0	$ 0

CONDENSED CONSOLIDATED STATEME5

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Cash flows from operating activities:
Net income	$ 199,865	$ 185,383
Adjustments to reconcile net income to net cash provided by operating activities:
Amortization	65,025	65,406
Depreciation	15,867	15,635
Non-cash stock-based compensation	11,593	17,348
Change in estimated acquisition earn-out payables	6,846	2,194
Deferred income taxes	20,081	16,974
Amortization of debt discount	118	118
Deferred Finance Costs, Own-share Lending Arrangement, Issuance Costs, Amortization Expense	1,207	0
Accretion (Amortization) of Discounts and Premiums, Investments	36	0
Income tax benefit from exercise of shares from the stock benefit plans	(7,213)	(2,502)
Payments On Acquisition Earn Outs In Excess Of Original Estimated Payables	(3,683)	(4,917)
Net gain on sales of investments, fixed assets and customer accounts	(2,860)	(830)
Changes in operating assets and liabilities, net of effect from acquisitions and divestitures:
Restricted cash and investments (increase) decrease	(48,526)	42,123
Premiums, commissions and fees receivable (increase) decrease	(31,324)	2,277
Reinsurance recoverables (increase)	(300,036)	(24,177)
Prepaid reinsurance premiums decrease	(24,324)	(9,191)
Other assets (increase)	1,231	(13,076)
Premiums payable to insurance companies increase	39,787	(37,845)
Premium deposits and credits due customers increase	27,914	12,717
Losses and loss adjustment reserve increase	300,036	24,177
Unearned premiums (decrease)	24,324	9,191
Accounts payable increase	13,858	27,793
Accrued expenses and other liabilities (decrease)	(22,119)	(11,547)
Other liabilities (decrease)	(17,094)	(26,610)
Net cash provided by operating activities	270,609	290,641
Cash flows from investing activities:
Additions to fixed assets	(13,135)	(12,773)
Payments for businesses acquired, net of cash acquired	(113,219)	(109,926)
Proceeds from sales of fixed assets and customer accounts	3,411	4,794
Purchases and proceeds from sales of investments	(24,332)	(16,875)
Proceeds from Sale, Maturity and Collection of Investments	16,716	14,460
Net cash used in investing activities	(130,559)	(120,320)
Cash flows from financing activities:
Payments on acquisition earn-outs	(23,872)	(22,020)
Payments on long-term debt	(34,375)	(38,750)
Income tax benefit from exercise of shares from the stock benefit plans	7,213	2,502
Issuances of common stock for employee stock benefit plans	15,959	15,854
Repurchase Of Stock Benefit Plan Shares For Employees To Fund Tax Withholdings	(8,395)	(2,297)
Purchase of treasury stock	(11,250)	(100,000)
Settlement (Prepayment) of accelerated share repurchase program	11,250	0
Cash dividends paid	(51,317)	(46,840)
Net cash (used in) financing activities	(94,787)	(191,551)
Net increase (decrease) in cash and cash equivalents	45,263	(21,230)
Cash and cash equivalents at beginning of period	443,420
Cash and cash equivalents at end of period	$ 488,683	$ 448,818

Nature of Operations

Nature of Operations	9 Months Ended
	Sep. 30, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Nature of Operations	Nature of Operations Brown & Brown, Inc., a Florida corporation, and its subsidiaries (collectively, “Brown & Brown” or the “Company”) is a diversified insurance agency, wholesale brokerage, insurance programs and services organization that markets and sells to its customers, insurance products and services, primarily in the property and casualty area. Brown & Brown’s business is divided into four reportable segments: the Retail Segment provides a broad range of insurance products and services to commercial, public entity, professional and individual customers; the National Programs Segment, acting as a managing general agent (“MGA”), provides professional liability and related package products for certain professionals, a range of insurance products for individuals, flood coverage, and targeted products and services designated for specific industries, trade groups, governmental entities and market niches, all of which are delivered through nationwide networks of independent agents, and Brown & Brown retail agents; the Wholesale Brokerage Segment markets and sells excess and surplus commercial insurance, primarily through independent agents and brokers, as well as Brown & Brown Retail offices; and the Services Segment provides insurance-related services, including third-party claims administration and comprehensive medical utilization management services in both the workers’ compensation and all-lines liability arenas, as well as Medicare Set-aside services, Social Security disability and Medicare benefits advocacy services, and claims adjusting services. Since May 2014, we have owned a flood insurance carrier, Wright National Flood Insurance Company (“Wright Flood”). Wright Flood’s business consists of policies written pursuant to the National Flood Insurance Program of 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, 2016
Condensed Financial Information of Parent Company Only Disclosure [Abstract]
Basis of Financial Reporting	Basis of Financial Reporting The accompanying unaudited Condensed Consolidated Financial Statements have been prepared in accordance with U.S. GAAP for interim financial information and with the instructions for Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by U.S. GAAP for complete financial statements. In the opinion of management, all adjustments (consisting of normal recurring accruals) considered necessary for a fair presentation have been included. These unaudited Condensed Consolidated Financial Statements should be read in conjunction with the audited Consolidated Financial Statements and the Notes thereto set forth in the Company’s Annual Report on Form 10-K for the year ended December 31, 2015 . The preparation of these financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, as well as disclosures of contingent assets and liabilities, at the date of the Consolidated Financial Statements, and the reported amounts of revenues and expenses during the reporting period. Actual results may differ from those estimates. In April 2015, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update ("ASU") 2015-03, "Simplifying the Presentation of Debt Issuance Costs". The guidance requires that debt issuance costs related to a recognized debt liability be presented in the balance sheet as a direct deduction from the carrying amount of the debt liability, consistent with debt discounts, and not recorded as a separate asset. The reason for the change is to align the treatment of debt issuance costs and debt discounts so that both reduce the carrying value of the liability. In August 2015, the FASB clarified that its guidance does not apply to line-of credit arrangements. This guidance requires retrospective application and is effective for fiscal years beginning after December 15, 2015 and for interim periods within those fiscal years, with early adoption permitted. The Company adopted the guidance on January 1, 2016, as required. As a result, the Company retrospectively applied the guidance to the 2015 Consolidated Balance Sheet by reclassifying $8.3 million from other assets to long-term debt. The Company has condensed the presentation of non-cash stock based compensation into the employee compensation and benefits line. The non-cash stock based compensation shown in the 2015 Consolidated Statement of Income was $15.5 million for the full year. Recently Issued Accounting Pronouncements In August 2016, the FASB issued ASU 2016-15, "Statement of Cash Flows (Topic 230)": Classification of Certain Cash Receipts and Cash Payments (a consensus of the Emerging Issues Task Force) ("ASU 2016-15"), which addresses eight specific cash flow issues with the objective of reducing the existing diversity in practice in how certain cash receipts and cash payments are presented and classified and applies to all entities, including both business entities and not-for-profit entities that are required to present a statement of cash flows under Topic 230. ASU 2016-15 will take effect for public companies for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2017 and early adoption is permitted. The Company is currently in the process of evaluating the impact of adoption of the ASU on its consolidated financial statements. In March 2016, the FASB issued ASU 2016-08, "Principal Versus Agent Considerations (Reporting Revenue Gross Versus Net)" ("ASU 2016-08") to clarify certain aspects of the principal-versus-agent guidance included in the new revenue standard ASU 2014-09 "Revenue from Contracts with Customers" ("ASU 2014-09"). The FASB issued the ASU in response to concerns identified by stakeholders, including those related to (1) determining the appropriate unit of account under the revenue standard’s principal-versus-agent guidance and (2) applying the indicators of whether an entity is a principal or an agent in accordance with the revenue standard’s control principle. ASU 2016-08 is effective for the Company beginning January 1, 2018. The impact of ASU 2016-08 is currently being evaluated along with ASU 2014-09. In March 2016, the FASB issued ASU 2016-09, "Improvements to Employee Share Based Payment Accounting" ("ASU 2016-09"), which amends guidance issued in Accounting Standards Codification ("ASC") Topic 718, Compensation – Stock Compensation. ASU 2016-09 simplifies several aspects of the accounting for share-based payment transactions, including the income tax consequences, classification of awards as either equity or liabilities, and classification on the statement of cash flows. ASU 2016-09 is effective for fiscal years beginning after December 15, 2016, and interim periods within those fiscal years and early adoption is permitted. The Company is currently in the process of evaluating the impact of adoption of the ASU on its Consolidated Financial Statements. In February 2016, the FASB issued ASU 2016-02, “Leases (Topic 842)” (“ASU 2016-02”), which provides guidance for accounting for leases. Under ASU 2016-02, the Company will be required to recognize the assets and liabilities for the rights and obligations created by leased assets. ASU 2016-02 will take effect for public companies for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2018. The Company is currently evaluating its leases against the requirements of this pronouncement, with the primary effect of adopting the new standard being the requirement to record assets and obligations for operating leases with original terms greater than twelve months. In November 2015, FASB issued ASU No. 2015-17, “Income Taxes (Topic 740) - Balance Sheet Classification of Deferred Taxes” (“ASU 2015-17”), which simplifies the presentation of deferred income taxes by requiring deferred tax assets and liabilities be classified as a single non-current item on the balance sheet. ASU 2015-17 is effective for fiscal years beginning after December 15, 2016 with early adoption permitted as of the beginning of any interim or annual reporting period. The Company plans to adopt ASU 2015-17 in the first quarter of 2017. This is not expected to have a material impact on our Consolidated Financial Statements other than reclassifying current deferred tax assets and liabilities to non-current on the balance sheet. In August 2014, FASB issued ASU No. 2014-15, “Disclosure of Uncertainties About an Entity’s Ability to Continue as a Going Concern” (“ASU 2014-15”), which addresses management’s responsibility in evaluating whether there is substantial doubt about a company’s ability to continue as a going concern and to provide related footnote disclosures. ASU 2014-15 is effective for fiscal years beginning after December 15, 2016 and for interim periods within those fiscal years, with early adoption permitted. The Company does not expect to early adopt this guidance, and it believes the adoption of this guidance will not have an impact on our Consolidated Financial Statements. In May 2014, FASB issued ASU 2014-09, which provides guidance for revenue recognition. ASU 2014-09 affects any entity that either enters into contracts with customers to transfer goods or services or enters into contracts for the transfer of non-financial assets, and supersedes the revenue recognition requirements in Topic 605, “Revenue Recognition,” and most industry-specific guidance. The standard’s core principle is that a company will recognize revenue when it transfers promised goods or services to customers in an amount that reflects the consideration to which a company expects to be entitled in exchange for those goods or services. In doing so, companies will need to use more judgment and make more estimates than under the current guidance. These may include identifying performance obligations in the contract, estimating the amount of variable consideration to include in the transaction price and allocating the transaction price to each separate performance obligation. ASU 2014-09 is effective for the Company beginning January 1, 2018. 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, 2016
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) 2016 2015 2016 2015 Net income $ 71,545 $ 67,427 $ 199,865 $ 185,383 Net income attributable to unvested awarded performance stock (1,873 ) (1,565 ) (5,210 ) (4,370 ) Net income attributable to common shares $ 69,672 $ 65,862 $ 194,655 $ 181,013 Weighted average number of common shares outstanding – basic 140,129 140,955 139,642 141,517 Less unvested awarded performance stock included in weighted average number of common shares outstanding – basic (3,668 ) (3,271 ) (3,640 ) (3,336 ) Weighted average number of common shares outstanding for basic earnings per common share 136,461 137,684 136,002 138,181 Dilutive effect of stock options 1,721 2,357 1,582 2,265 Weighted average number of shares outstanding – diluted 138,182 140,041 137,584 140,446 Net income per share: Basic $ 0.51 $ 0.48 $ 1.43 $ 1.31 Diluted $ 0.50 $ 0.47 $ 1.41 $ 1.29

Business Combinations

Business Combinations	9 Months Ended
	Sep. 30, 2016
Business Combinations [Abstract]
Business Combinations	Business Combinations During the nine months ended September 30, 2016 , Brown & Brown acquired the assets and assumed certain liabilities of five insurance intermediaries and all of the stock of one insurance intermediaries. Additionally, miscellaneous adjustments were recorded to the purchase price allocation of certain prior acquisitions completed within the last twelve months as permitted by Accounting Standards Codification Topic 805 — Business Combinations (“ASC 805”). Such adjustments are presented in the "Other" category within the following two tables. All of these businesses were acquired primarily to expand Brown & Brown’s core business and to attract and hire high-quality individuals. The recorded purchase price for all acquisitions consummated after January 1, 2009 included an estimation of the fair value of liabilities associated with any potential earn-out provisions. Subsequent changes in the fair value of earn-out obligations will be recorded in the Condensed Consolidated Statement of Income when incurred. The fair value of earn-out obligations is based on the present value of the expected future payments to be made to the sellers of the acquired businesses in accordance with the provisions outlined in the respective purchase agreements. In determining fair value, the acquired business’s future performance is estimated using financial projections developed by management for the acquired business and reflects market participant assumptions regarding revenue growth and/or profitability. The expected future payments are estimated on the basis of the earn-out formula and performance targets specified in each purchase agreement compared to the associated financial projections. These payments are then discounted to present value using a risk-adjusted rate that takes into consideration the likelihood that the forecasted earn-out payments will be made. Based on the acquisition date and the complexity of the underlying valuation work, certain amounts included in the Company’s Condensed Consolidated Financial Statements may be provisional and thus subject to further adjustments within the permitted measurement period, as defined in ASC 805. For the nine months ended September 30, 2016 , several adjustments were made within the permitted measurement period that resulted in a decrease in the aggregate purchase price of the affected acquisitions of $917,497 relating to the assumption of certain liabilities. These measurement period adjustments have been reflected as current period adjustments in the nine months ended September 30, 2016 in accordance with the guidance in ASU 2015-16 "Business Combinations". The measurement period adjustments impacted goodwill, with no effect on earnings or cash in the current period. Cash paid for acquisitions was $ 115.3 million and $ 109.9 million in the nine -month periods ended September 30, 2016 and 2015 , respectively. We completed six acquisitions (excluding book of business purchases) in the nine -month period ended September 30, 2016 . We completed nine acquisitions (excluding book of business purchases) in the nine -month period ended September 30, 2015 . The following table summarizes the purchase price allocation made as of the date of each acquisition for current year acquisitions and adjustments made during the measurement period for prior year acquisitions. The purchase price allocation for Social Security Advocates for the Disabled ("SSAD") and Morstan General Agency, Inc. ("Morstan") are provisional as they are based on initial valuations. The primary areas of the preliminary purchase price allocations for SSAD and Morstan that are not yet finalized relate to the fair value of certain tangible and intangible assets acquired and liabilities assumed, assets and liabilities related to income taxes and residual goodwill. During the measurement periods, the Company will adjust assets or liabilities if new information is obtained about facts and circumstances that existed as of the acquisition date that, if known, would have resulted in the recognition of those assets and liabilities as of that date. With the Company's adoption of ASU No. 2015-16 in the first fiscal quarter of 2016, these adjustments will be made in the period in which the amounts are determined and the current period income effect of such adjustments will be calculated as if the adjustments had been completed as of the acquisition date. (in thousands) Name Business Segment Effective Date of Acquisition Cash Paid Note Payable Other Payable Recorded Earn-Out Payable Net Assets Acquired Maximum Potential Earn- Out Payable Social Security Advocates for the Disabled (SSAD) Services February 1, 2016 $ 32,526 $ 492 $ — $ 971 $ 33,989 $ 3,000 Morstan General Agency, Inc. (Morstan) Wholesale June 1, 2016 66,050 — 10,200 3,091 79,341 5,000 Other Various Various 16,737 — 305 (234 ) 16,808 5,722 Total $ 115,313 $ 492 $ 10,505 $ 3,828 $ 130,138 $ 13,722 The following table summarizes the estimated fair values of the aggregate assets and liabilities acquired as of the date of each acquisition. (in thousands) SSAD Morstan Other Total Cash $ 2,094 $ — $ — $ 2,094 Other current assets 1,042 2,482 753 4,277 Fixed assets 307 300 47 654 Goodwill 22,352 51,454 11,876 85,682 Purchased customer accounts 13,069 26,481 7,201 46,751 Non-compete agreements 72 39 84 195 Total assets acquired 38,936 80,756 19,961 139,653 Other current liabilities (1,717 ) (1,415 ) (3,153 ) (6,285 ) Deferred income tax, net (3,230 ) — — (3,230 ) Total liabilities assumed (4,947 ) (1,415 ) (3,153 ) (9,515 ) Net assets acquired $ 33,989 $ 79,341 $ 16,808 $ 130,138 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 $85.7 million , which is net of any opening balance sheet adjustments within the allowable measurement period, was allocated to the Retail, National Programs, Wholesale Brokerage and Service Segments in the amounts of $11.9 million , $(1.0) thousand , $51.5 million and $22.4 million , respectively. Of the total goodwill of $85.7 million , $60.5 million is currently deductible for income tax purposes and $21.4 million is non-deductible. The remaining $3.8 million relates to the recorded earn-out payables and will not be deductible until it is earned and paid. For the acquisitions completed during 2016, the results of operations since the acquisition dates have been combined with those of the Company. The total revenues from the acquisitions completed through September 30, 2016 , included in the Condensed Consolidated Statement of Income for the three and nine months ended September 30, 2016 , were $12.6 million and $21.5 million , respectively. The income before income taxes, including the intercompany cost of capital charge, from the acquisitions completed through September 30, 2016 , included in the Condensed Consolidated Statement of Income for the three and nine months ended September 30, 2016 , were $1.0 million and $2.4 million . If the acquisitions had occurred as of the beginning of the respective periods, the Company’s results of operations would be as shown in the following table. These unaudited pro forma results are not necessarily indicative of the actual results of operations that would have occurred had the acquisitions actually been made at the beginning of the respective periods. (UNAUDITED) For the three months For the nine months (in thousands, except per share data) 2016 2015 2016 2015 Total revenues $ 462,684 $ 445,672 $ 1,350,014 $ 1,295,027 Income before income taxes $ 117,144 $ 115,749 $ 332,101 $ 315,824 Net income $ 71,650 $ 69,171 $ 201,996 $ 190,387 Net income per share: Basic $ 0.51 $ 0.49 $ 1.45 $ 1.35 Diluted $ 0.51 $ 0.48 $ 1.43 $ 1.32 Weighted average number of shares outstanding: Basic 136,461 137,684 136,002 138,181 Diluted 138,182 140,041 137,584 140,446 As of September 30, 2016 and 2015 , the fair values of the estimated acquisition earn-out payables were re-evaluated and measured at fair value on a recurring basis using unobservable inputs (Level 3) as defined in ASC 820- Fair Value Measurement . The resulting additions, payments, and net changes, as well as the interest expense accretion on the estimated acquisition earn-out payables, for the three and nine months ended September 30, 2016 and 2015 , were as follows: For the three months For the nine months (in thousands) 2016 2015 2016 2015 Balance as of the beginning of the period $ 73,447 $ 90,113 $ 78,387 $ 75,283 Additions to estimated acquisition earn-out payables 1,437 2,363 3,828 29,496 Payments for estimated acquisition earn-out payables (16,988 ) (12,899 ) (27,555 ) (26,937 ) Subtotal 57,896 79,577 54,660 77,842 Net change in earnings from estimated acquisition earn-out payables: Change in fair value on estimated acquisition earn-out payables 2,883 (365 ) 4,704 (30 ) Interest expense accretion 727 824 2,142 2,224 Net change in earnings from estimated acquisition earn-out payables 3,610 459 6,846 2,194 Balance as of September 30, $ 61,506 $ 80,036 $ 61,506 $ 80,036 Of the $61.5 million estimated acquisition earn-out payables as of September 30, 2016 , $23.0 million was recorded as accounts payable and $38.5 million was recorded as other non-current liabilities. Included within the additions to estimated acquisition earn-out payables are any adjustments to opening balance sheet items within the allowable measurement period, which may therefore differ from previously reported amounts.

Goodwill

Goodwill	9 Months Ended
	Sep. 30, 2016
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, 2015, 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, 2016 are as follows: (in thousands) Retail National Programs Wholesale Brokerage Services Total Balance as of January 1, 2016 $ 1,345,636 $ 901,866 $ 226,961 $ 112,220 $ 2,586,683 Goodwill of acquired businesses 11,854 (1 ) 51,477 22,352 85,682 Goodwill of transferred businesses 571 (571 ) — — — Balance as of September 30, 2016 $ 1,358,061 $ 901,294 $ 278,438 $ 134,572 $ 2,672,365

Amortizable Intangible Assets

Amortizable Intangible Assets	9 Months Ended
	Sep. 30, 2016
Goodwill and Intangible Assets Disclosure [Abstract]
Amortizable Intangible Assets	Amortizable Intangible Assets Amortizable intangible assets at September 30, 2016 and December 31, 2015 consisted of the following: September 30, 2016 December 31, 2015 (in thousands) Gross Carrying Value Accumulated Amortization Net Carrying Value Weighted Average Life (Years)(1) Gross Carrying Value Accumulated Amortization Net Carrying Value Weighted Average Life (Years) (1) Purchased customer accounts $ 1,445,052 $ (720,728 ) $ 724,324 15.0 $ 1,398,986 $ (656,799 ) $ 742,187 15.0 Non-compete agreements 29,635 (27,819 ) 1,816 6.8 29,440 (26,947 ) 2,493 6.8 Total $ 1,474,687 $ (748,547 ) $ 726,140 $ 1,428,426 $ (683,746 ) $ 744,680 (1) Weighted average life calculated as of the date of acquisition. Amortization expense for amortizable intangible assets for the years ending December 31, 2016 , 2017 , 2018 , 2019 and 2020 is estimated to be $86.6 million , $84.7 million , $79.5 million , $75.0 million , and $67.6 million , respectively.

Long-Term Debt

Long-Term Debt	9 Months Ended
	Sep. 30, 2016
Debt Disclosure [Abstract]
Long-Term Debt	Long-Term Debt Long-term debt at September 30, 2016 and December 31, 2015 consisted of the following: (in thousands) September 30, 2016 December 31, 2015 Current portion of long-term debt: Current portion of 5-year term loan facility expires 2019 $ 55,000 $ 48,125 5.660% senior notes, Series C, semi-annual interest payments, balloon due 2016 25,000 25,000 Short-term promissory note 492 — Total current portion of long-term debt 80,492 73,125 Long-term debt: Note agreements: 4.500% senior notes, Series E, quarterly interest payments, balloon due 2018 100,000 100,000 4.200% senior notes, semi-annual interest payments, balloon due 2024 498,746 498,628 Total notes 598,746 598,628 Credit agreements: 5-year term-loan facility, periodic interest and principal payments, LIBOR plus up to 1.750%, expires May 20, 2019 440,000 481,250 5-year revolving-loan facility, periodic interest payments, currently LIBOR plus up to 1.500% and commitment fees up to 0.250%, expires May 20, 2019 — — Total credit agreements 440,000 481,250 Debt issuance costs (contra) (7,053 ) (8,260 ) Total long-term debt less unamortized discount and debt issuance costs 1,031,693 1,071,618 Current portion of long-term debt 80,492 73,125 Total debt $ 1,112,185 $ 1,144,743 On December 22, 2006, the Company entered into a Master Shelf and Note Purchase Agreement (the “Master Agreement”) with a national insurance company (the “Purchaser”). The initial issuance of notes under the Master Agreement occurred on December 22, 2006, through the issuance of $25.0 million in Series C Senior Notes due December 22, 2016, with a fixed interest rate of 5.660% per year. On February 1, 2008, $25.0 million in Series D Senior Notes due January 15, 2015, with a fixed interest rate of 5.370% 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 4.500% 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, 2016 , there was an outstanding debt balance issued under the provisions of the Master Agreement of $125.0 million . On July 1, 2013, in conjunction with the acquisition of Beecher Carlson Holdings, Inc., the Company entered into a revolving loan agreement (the “Wells Fargo Agreement”) with Wells Fargo Bank, N.A. that provided for a $50.0 million revolving line of credit (the “Wells Fargo Revolver”). The maturity date for the Wells Fargo Revolver is December 31, 2016 , at which time all outstanding principal and unpaid interest will be due. On April 16, 2014, in connection with the signing of the Credit Facility (as defined below) an amendment to the agreement was established to reduce the total revolving loan commitment from $50.0 million to $25.0 million . The Wells Fargo Revolver may be increased by up to $50.0 million (bringing the total amount available to $75.0 million ). The calculation of interest and fees for the Wells Fargo Agreement is generally based on the Company’s funded debt-to-EBITDA ratio. Interest is charged at a rate equal to 1.000% to 1.400% above LIBOR or 1.000% 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 0.250% , and a letter of credit margin fee of 1.000% to 1.400% . The obligations under the Wells Fargo Revolver are unsecured and the Wells Fargo Agreement includes various covenants, limitations and events of default that are customary for similar facilities for similar borrowers. On March 14, 2016, the Wells Fargo Revolver was terminated before its maturity date as mentioned above with no fees incurred. There were no borrowings against the Wells Fargo Revolver as of September 30, 2016 and December 31, 2015. On April 17, 2014, the Company entered into a credit agreement with JPMorgan Chase Bank, N.A. as administrative agent and certain other banks as co-syndication agents and co-documentation agents (the “Credit Agreement”). The Credit Agreement in the amount of $1,350.0 million provides for an unsecured revolving credit facility (the “Credit Facility”) in the initial amount of $800.0 million and unsecured term loans in the initial amount of $550.0 million , either or both of which may, subject to lenders’ discretion, potentially be increased by up to $500.0 million . The Credit Facility was funded on May 20, 2014 in conjunction with the closing of the Wright acquisition, with the $550.0 million term loan being funded as well as a drawdown of $375.0 million on the revolving loan facility. Use of these proceeds was to retire existing term loan debt and to facilitate the closing of the Wright acquisition as well as other acquisitions. The Credit Facility terminates on May 20, 2019, but either or both of the revolving Credit Facility and the term loans may be extended for two additional one -year periods at the Company’s request and at the discretion of the respective lenders. Interest and facility fees in respect to the Credit Facility are based on the better of the Company’s net debt leverage ratio or a non-credit enhanced senior unsecured long-term debt rating. Based on the Company’s net debt leverage ratio, the rates of interest charged on the term loan are 1.000% to 1.750% , and the revolving loan is 0.850% to 1.500% 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 0.150% to 0.250% 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, 2016 and December 31, 2015, there was an outstanding debt balance issued under the provisions of the Credit Facility in total of $495.0 million and $529.4 million respectively, with no borrowings outstanding relative to the revolving loan. Per the terms of the agreement, a scheduled principal payment of $13.8 million is due on December 31, 2016. On September 18, 2014, the Company issued $500.0 million of 4.200% unsecured senior notes due in 2024 . The senior notes were given investment grade ratings of BBB-/Baa3 with a stable outlook. The notes are subject to certain covenant restrictions and regulations which are customary for credit rated obligations. At the time of funding, the proceeds were offered at a discount of the original note amount which also excluded an underwriting fee discount. The net proceeds received from the issuance were used to repay the outstanding balance of $475.0 million on the revolving Credit Facility and for other general corporate purposes. As of September 30, 2016 and December 31, 2015, there was an outstanding debt balance of $500.0 million exclusive of the associated discount balance. The Master Agreement and the Credit Agreement all require the Company to maintain certain financial ratios and comply with certain other covenants. The Company was in compliance with all such covenants as of September 30, 2016 and December 31, 2015. The 30-day Adjusted LIBOR Rate as of September 30, 2016 was 0.563% .

Supplemental Disclosures of Cas

Supplemental Disclosures of Cash Flow Information and Non-Cash Financing and Investing Activities	9 Months Ended
	Sep. 30, 2016
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 composed of funds held in separate premium trust accounts as required by state law or, in some cases, pursuant to agreements with our carrier partners. In the second quarter of 2015, certain balances that had previously been reported as held in restricted premium trust accounts were reclassified as non-restricted as they were not restricted by state law or by contractual agreement with a carrier. The resulting impact of this change is a reduction during the second quarter of 2015 of approximately $41.0 million in the balance reported on our Condensed Consolidated Balance Sheet as Restricted Cash and Investments and a corresponding increase in the balance reported as Cash and Cash Equivalents. While these balances are not restricted, they do represent premium payments from customers to be paid to insurance carriers and this change should not be viewed as a source of operating cash. For the nine months (in thousands) 2016 2015 Cash paid during the period for: Interest $ 33,122 $ 33,091 Income taxes $ 104,739 $ 96,579 Brown & Brown’s significant non-cash investing and financing activities are summarized as follows: For the nine months (in thousands) 2016 2015 Other payable issued for purchased customer accounts $ 10,505 $ 995 Estimated acquisition earn-out payables and related charges $ 3,828 $ 29,497 Notes payable issued or assumed for purchased customer accounts $ 492 $ — Notes received on the sale of fixed assets and customer accounts $ — $ 544

Legal and Regulatory Proceeding

Legal and Regulatory Proceedings	9 Months Ended
	Sep. 30, 2016
Commitments and Contingencies Disclosure [Abstract]
Legal and Regulatory Proceedings	Legal and Regulatory Proceedings The Company is involved in numerous pending or threatened proceedings by or against Brown & Brown, Inc. or one or more of its subsidiaries that arise in the ordinary course of business. The damages that may be claimed against the Company in these various proceedings are in some cases substantial, including in certain instances claims for punitive or extraordinary damages. Some of these claims and lawsuits have been resolved, others are in the process of being resolved and others are still in the investigation or discovery phase. The Company will continue to respond appropriately to these claims and lawsuits and to vigorously protect its interests. We continue to assess certain litigation and claims to determine the amounts, if any, that management believes will be paid as a result of such claims and litigation and, therefore, additional losses may be accrued and paid in the future, which could adversely impact the Company’s operating results, cash flows and overall liquidity. The Company maintains third-party insurance policies to provide coverage for certain legal claims, in an effort to mitigate its overall exposure to unanticipated claims or adverse decisions. However, as (i) one or more of the Company’s insurance carriers could take the position that portions of these claims are not covered by the Company’s insurance, (ii) to the extent that payments are made to resolve claims and lawsuits, applicable insurance policy limits are eroded and (iii) the claims and lawsuits relating to these matters are continuing to develop, it is possible that future results of operations or cash flows for any particular quarterly or annual period could be materially affected by unfavorable resolutions of these matters. Based on the AM Best Company ratings of these third-party insurers, management does not believe there is a substantial risk of an insurer’s material non-performance related to any current insured claims. On the basis of current information, the availability of insurance and legal advice, in management’s opinion, the Company is not currently involved in any legal proceedings which, individually or in the aggregate, would have a material adverse effect on its financial condition, operations and/or cash flows.

Segment Information

Segment Information	9 Months Ended
	Sep. 30, 2016
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 agents; and (4) the Services Segment, which provides insurance-related services, including third-party claims administration and comprehensive medical utilization management services in both the workers’ compensation and all-lines liability arenas, as well as Medicare Set-aside services, Social Security disability and Medicare benefits advocacy services and claims adjusting services. Brown & Brown conducts all of its operations within the United States of America, except for a wholesale brokerage operation based in London, England, and retail operations in Bermuda and the Cayman Islands. These operations earned $3.8 million and $3.2 million of total revenues for the three months ended September 30, 2016 and 2015 , respectively. These operations earned $10.3 million and $9.3 million of total revenues for the nine months ended September 30, 2016 and 2015 , respectively. Long-lived assets held outside of the United States as of September 30, 2016 and 2015 were not material. The accounting policies of the reportable segments are the same as those described in Note 1 of the Company’s Annual Report on Form 10-K for the year ended December 31, 2015 . The Company evaluates the performance of its segments based upon revenues and income before income taxes. Inter-segment revenues are eliminated. Summarized financial information concerning the Company’s reportable segments is shown in the following table. The “Other” column includes any income and expenses not allocated to reportable segments, corporate-related items, including the inter-company interest expense charge to the reporting segment, and the elimination of inter-segment activities. For the three months ended September 30, 2016 (in thousands) Retail National Programs Wholesale Brokerage Services Other Total Total revenues $ 228,645 $ 123,632 $ 70,192 $ 39,586 $ 219 $ 462,274 Investment income $ 5 $ 96 $ — $ 57 $ 72 $ 230 Amortization $ 10,861 $ 6,921 $ 2,882 $ 1,140 $ 1 $ 21,805 Depreciation $ 1,508 $ 1,945 $ 503 $ 473 $ 766 $ 5,195 Interest expense $ 9,026 $ 10,844 $ 1,540 $ 1,257 $ (12,784 ) $ 9,883 Income before income taxes $ 44,894 $ 32,319 $ 20,862 $ 5,971 $ 12,926 $ 116,972 Total assets $ 3,652,977 $ 2,933,568 $ 1,053,516 $ 342,360 $ (2,460,394 ) $ 5,522,027 Capital expenditures $ 1,443 $ 2,153 $ 11 $ 80 $ 504 $ 4,191 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 nine months ended September 30, 2016 (in thousands) Retail National Programs Wholesale Brokerage Services Other Total Total revenues $ 695,393 $ 333,522 $ 184,893 $ 117,906 $ 1,251 $ 1,332,965 Investment income $ 33 $ 583 $ 4 $ 204 $ 326 $ 1,150 Amortization $ 32,743 $ 21,011 $ 7,915 $ 3,345 $ 11 $ 65,025 Depreciation $ 4,761 $ 5,881 $ 1,487 $ 1,432 $ 2,306 $ 15,867 Interest expense $ 29,415 $ 34,895 $ 2,472 $ 3,820 $ (40,985 ) $ 29,617 Income before income taxes $ 144,496 $ 68,367 $ 51,711 $ 17,929 $ 46,095 $ 328,598 Total assets $ 3,652,977 $ 2,933,568 $ 1,053,516 $ 342,360 $ (2,460,394 ) $ 5,522,027 Capital expenditures $ 4,664 $ 5,399 $ 925 $ 561 $ 1,586 $ 13,135 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

Investments

Investments	9 Months Ended
	Sep. 30, 2016
Investments, Debt and Equity Securities [Abstract]
Investments	Investments At September 30, 2016 , the Company’s amortized cost and fair values of fixed maturity securities are summarized as follows: (in thousands) Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value U.S. Treasury securities, obligations of U.S. Government agencies and Municipals $ 26,787 $ 118 $ (5 ) $ 26,900 Corporate debt 3,129 38 — 3,167 Total $ 29,916 $ 156 $ (5 ) $ 30,067 At September 30, 2016 , the Company held $26.9 million in fixed income securities composed of U.S. Treasury securities, securities issued by U.S. Government agencies and Municipalities, and $3.2 million issued by corporations with investment grade ratings. Of that total, $3.8 million is classified as short-term investments on the Consolidated Balance Sheet as maturities are less than one-year. Additionally, the Company holds $9.5 million in short-term investments which are related to time deposits held with various financial institutions. 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, 2016 : Less than 12 Months 12 Months or More Total (in thousands) Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses U.S. Treasury securities, obligations of U.S. Government agencies and Municipals $ 5,102 $ (5 ) $ — $ — $ 5,102 $ (5 ) Corporate debt 701 — 160 — 861 — Total $ 5,803 $ (5 ) $ 160 $ — $ 5,963 $ (5 ) The unrealized losses were caused by interest rate increases. At September 30, 2016 , the Company had 10 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, 2016 . At December 31, 2015 , the Company’s amortized cost and fair values of fixed maturity securities are summarized as follows: (in thousands) Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value U.S. Treasury securities, obligations of U.S. Government agencies and Municipals $ 11,876 $ 6 $ (26 ) $ 11,856 Foreign government 50 — — 50 Corporate debt 4,505 7 (16 ) 4,496 Short-duration fixed income fund 1,663 27 — 1,690 Total $ 18,094 $ 40 $ (42 ) $ 18,092 The following table shows the investments’ gross unrealized loss and fair value, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position as of December 31, 2015 : Less than 12 Months 12 Months or More Total (in thousands) Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses U.S. Treasury securities, obligations of U.S. Government agencies and Municipals $ 8,998 $ (26 ) $ — $ — $ 8,998 $ (26 ) Foreign Government 50 — — — 50 — Corporate debt 2,731 (14 ) 284 (2 ) 3,015 (16 ) Total $ 11,779 $ (40 ) $ 284 $ (2 ) $ 12,063 $ (42 ) The unrealized losses in the Company's investments in U.S. Treasury Securities and obligations of U.S. Government agencies and bonds from corporate issuers were caused by interest rate increases. At December 31, 2015 , the Company had 35 securities in an unrealized loss position. The contractual cash flows of the U.S. Treasury Securities and obligations of the U.S. Government agencies investments are either guaranteed by the U.S. Government or an agency of the U.S. Government. Accordingly, it is expected that the securities would not be settled at a price less than the amortized cost of the Company’s investment. The corporate securities are highly rated securities with no indicators of potential impairment. Based on the ability and intent of the Company to hold these investments until recovery of fair value, which may be maturity, the bonds were not considered to be other-than-temporarily impaired at December 31, 2015 . The amortized cost and estimated fair value of the fixed maturity securities at September 30, 2016 by contractual maturity are set forth below: (in thousands) Amortized Cost Fair Value Years to maturity: Due in one year or less $ 3,753 $ 3,760 Due after one year through five years 25,833 25,951 Due after five years 330 356 Total $ 29,916 $ 30,067 The amortized cost and estimated fair value of the fixed maturity securities at December 31, 2015 by contractual maturity are set forth below: (in thousands) Amortized Cost Fair Value Years to maturity: Due in one year or less $ 5,726 $ 5,722 Due after one year through five years 12,038 12,041 Due after five years 330 329 Total $ 18,094 $ 18,092 The expected maturities in the foregoing table may differ from the contractual maturities because certain borrowers have the right to call or prepay obligations with or without penalty. Proceeds from the sales and maturity of the Company’s investment in fixed maturity securities were $4.7 million . This along with maturing time deposits and the utilization of funds from a money-market investment account of $8.2 million yielded total cash proceeds from the sale of investments of $16.7 million in the period of January 1, 2016 to September 30, 2016 . These proceeds were used to purchase additional fixed maturity securities. The gains and losses realized on those sales for the period from January 1, 2016 to September 30, 2016 were insignificant . Additionally, there was a sale of the short-duration fixed income fund which resulted in cash proceeds of $1.7 million, as the fund was liquidated in the third quarter of 2016. Gains on this sale were also 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, 2016 , 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, 2016
Reinsurance Disclosures [Abstract]
Losses and Loss Adjustment Reserve	Although the reinsurers are liable to the Company for amounts reinsured, our subsidiary, Wright Flood remains primarily liable to its policyholders for the full amount of the policies written whether or not the reinsurers meet their obligations to the Company when they become due. The effects of reinsurance on premiums written and earned are as follows: Period from January 1, 2016 to (in thousands) Written Earned Direct premiums $ 472,138 $ 447,813 Ceded premiums (472,124 ) (447,799 ) Net premiums $ 14 $ 14 All premiums written by Wright Flood under the National Flood Insurance Program are 100% ceded to FEMA, for which Wright Flood received a 30.9% expense allowance from January 1, 2016 through September 30, 2016 . For the period from January 1, 2016 through September 30, 2016 , the Company ceded $470.9 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, excluding fees, to Arch Reinsurance Company and receives a 30.5% commission. Wright Flood ceded $1.2 million for the period from January 1, 2016 through September 30, 2016 . No loss data exists on this agreement. Wright Flood also ceded 100% of the Homeowners, Private Passenger Auto Liability, and Other Liability Occurrence to Stillwater Insurance Company, formerly known as Fidelity National Insurance Company. This business is in runoff. Therefore, only loss data still exists on this business. As of September 30, 2016 , no ceded unpaid losses and loss adjustment expenses or incurred but not reported expenses for Homeowners, Private Passenger Auto Liability and Other Liability Occurrence existed. As of September 30, 2016 the Condensed Consolidated Balance Sheet contained reinsurance recoverable of $332.0 million and prepaid reinsurance premiums of $334.0 million . There was no net activity in the reserve for losses and loss adjustment expense during the period January 1, 2016 through September 30, 2016 , as Wright Flood's direct premiums written were 100% ceded to two reinsurers. The balance of the reserve for losses and loss adjustment expense, excluding related reinsurance recoverable, as of September 30, 2016 was $332.0 million .

Statutory Financial Information

Statutory Financial Information	9 Months Ended
	Sep. 30, 2016
Statutory Accounting Practices [Abstract]
Statutory Financial Information	Statutory Financial Data Wright Flood maintains capital in excess of the minimum statutory amount of $7.5 million as required by regulatory authorities. The unaudited statutory capital and surplus of Wright Flood was $22.0 million at September 30, 2016 . For the period from January 1, 2016 through September 30, 2016 , Wright Flood generated statutory net income of $6.7 million .

Subsidiary Dividend Restriction

Subsidiary Dividend Restrictions	9 Months Ended
	Sep. 30, 2016
Disclosure of Restrictions on Dividends, Loans and Advances Disclosure [Abstract]
Subsidiary Dividend Restrictions	Subsidiary Dividend Restrictions Under the insurance regulations of Texas, where Wright Flood is incorporated, the maximum amount of ordinary dividends that Wright Flood can pay to shareholders in a rolling twelve-month period is limited to the greater of 10% of statutory adjusted capital and surplus as shown on Wright Flood’s last annual statement on file with the superintendent of the Texas Department of Insurance or 100% of adjusted net income. There was no dividend payout in 2015 and the maximum dividend payout that may be made in 2016 without prior approval is $4.1 million .

Shareholders' Equity

Shareholders' Equity	9 Months Ended
	Sep. 30, 2016
Equity [Abstract]
Shareholders' Equity	Shareholders’ Equity On March 5, 2015, the Company entered into an accelerated share repurchase program ("ASR") with an investment bank to purchase an aggregate $100.0 million of the Company’s common stock. As part of the ASR, the Company received an initial delivery of 2,667,992 shares of the Company’s common stock with a fair market value of approximately $85.0 million . On August 6, 2015, the Company was notified by its investment bank that the March 5, 2015 ASR agreement between the Company and the investment bank had been completed in accordance with the terms of the agreement. The investment bank delivered to the Company an additional 391,637 shares of the Company’s common stock for a total of 3,059,629 shares repurchased under the agreement. The delivery of the remaining 391,637 shares occurred on August 11, 2015. At the conclusion of this contract the Company had authorization for $50.0 million of share repurchases under the original Board authorization. On July 20, 2015, the Company’s Board of Directors authorized the repurchase of up to an additional $400.0 million of the Company’s outstanding common stock. On November 11, 2015, the Company entered into an ASR with an investment bank to purchase an aggregate $75.0 million of the Company’s common stock. The Company received an initial delivery of 1,985,981 shares of the Company’s common stock with a fair market value of approximately $63.8 million . On January 6, 2016 this agreement was completed by the investment bank with the delivery of 363,209 shares of the Company’s common stock. After completion of the ASR on January 6, 2016, the Company has approval to repurchase up to $375.0 million , in the aggregate, of the Company’s outstanding common stock. Under the authorization from the Company’s Board of Directors, shares may be purchased from time to time, at the Company’s discretion and subject to the availability of stock, market conditions, the trading price of the stock, alternative uses for capital, the Company’s financial performance and other potential factors. These purchases may be carried out through open market purchases, block trades, accelerated share repurchase plans of up to $100.0 million each (unless otherwise approved by the Board of Directors), negotiated private transactions or pursuant to any trading plan that may be adopted in accordance with Rule 10b5-1 of the Securities Exchange Act of 1934.

Nature of Operations (Policies)

Nature of Operations (Policies)	9 Months Ended
	Sep. 30, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Nature of Operations	four
Basis of Accounting	The accompanying unaudited Condensed Consolidated Financial Statements have been prepared in accordance with U.S. GAAP for interim financial information and with the instructions for Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by U.S. GAAP for complete financial statements. In the opinion of management, all adjustments (consisting of normal recurring accruals) considered necessary for a fair presentation have been included. These unaudited Condensed Consolidated Financial Statements should be read in conjunction with the audited Consolidated Financial Statements and the Notes thereto set forth in the Company’s Annual Report on Form 10-K for the year ended December 31, 2015 .
Recently Issued Accounting Pronouncements	Recently Issued Accounting Pronouncements

Net Income Per Share (Tables)

Net Income Per Share (Tables)	9 Months Ended
	Sep. 30, 2016
Earnings Per Share [Abstract]
Reconciliation between Basic and Diluted Weighted Average Shares Outstanding	The following is a reconciliation between basic and diluted weighted average shares outstanding: For the three months For the nine months (in thousands, except per share data) 2016 2015 2016 2015 Net income $ 71,545 $ 67,427 $ 199,865 $ 185,383 Net income attributable to unvested awarded performance stock (1,873 ) (1,565 ) (5,210 ) (4,370 ) Net income attributable to common shares $ 69,672 $ 65,862 $ 194,655 $ 181,013 Weighted average number of common shares outstanding – basic 140,129 140,955 139,642 141,517 Less unvested awarded performance stock included in weighted average number of common shares outstanding – basic (3,668 ) (3,271 ) (3,640 ) (3,336 ) Weighted average number of common shares outstanding for basic earnings per common share 136,461 137,684 136,002 138,181 Dilutive effect of stock options 1,721 2,357 1,582 2,265 Weighted average number of shares outstanding – diluted 138,182 140,041 137,584 140,446 Net income per share: Basic $ 0.51 $ 0.48 $ 1.43 $ 1.31 Diluted $ 0.50 $ 0.47 $ 1.41 $ 1.29

Business Combinations (Tables)

Business Combinations (Tables)	9 Months Ended
	Sep. 30, 2016
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 adjustments made during the measurement period for prior year acquisitions. The purchase price allocation for Social Security Advocates for the Disabled ("SSAD") and Morstan General Agency, Inc. ("Morstan") are provisional as they are based on initial valuations. The primary areas of the preliminary purchase price allocations for SSAD and Morstan that are not yet finalized relate to the fair value of certain tangible and intangible assets acquired and liabilities assumed, assets and liabilities related to income taxes and residual goodwill. During the measurement periods, the Company will adjust assets or liabilities if new information is obtained about facts and circumstances that existed as of the acquisition date that, if known, would have resulted in the recognition of those assets and liabilities as of that date. With the Company's adoption of ASU No. 2015-16 in the first fiscal quarter of 2016, these adjustments will be made in the period in which the amounts are determined and the current period income effect of such adjustments will be calculated as if the adjustments had been completed as of the acquisition date. (in thousands) Name Business Segment Effective Date of Acquisition Cash Paid Note Payable Other Payable Recorded Earn-Out Payable Net Assets Acquired Maximum Potential Earn- Out Payable Social Security Advocates for the Disabled (SSAD) Services February 1, 2016 $ 32,526 $ 492 $ — $ 971 $ 33,989 $ 3,000 Morstan General Agency, Inc. (Morstan) Wholesale June 1, 2016 66,050 — 10,200 3,091 79,341 5,000 Other Various Various 16,737 — 305 (234 ) 16,808 5,722 Total $ 115,313 $ 492 $ 10,505 $ 3,828 $ 130,138 $ 13,722
Estimated fair values of aggregate assets and liabilities acquired	The following table summarizes the estimated fair values of the aggregate assets and liabilities acquired as of the date of each acquisition. (in thousands) SSAD Morstan Other Total Cash $ 2,094 $ — $ — $ 2,094 Other current assets 1,042 2,482 753 4,277 Fixed assets 307 300 47 654 Goodwill 22,352 51,454 11,876 85,682 Purchased customer accounts 13,069 26,481 7,201 46,751 Non-compete agreements 72 39 84 195 Total assets acquired 38,936 80,756 19,961 139,653 Other current liabilities (1,717 ) (1,415 ) (3,153 ) (6,285 ) Deferred income tax, net (3,230 ) — — (3,230 ) Total liabilities assumed (4,947 ) (1,415 ) (3,153 ) (9,515 ) Net assets acquired $ 33,989 $ 79,341 $ 16,808 $ 130,138
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) 2016 2015 2016 2015 Total revenues $ 462,684 $ 445,672 $ 1,350,014 $ 1,295,027 Income before income taxes $ 117,144 $ 115,749 $ 332,101 $ 315,824 Net income $ 71,650 $ 69,171 $ 201,996 $ 190,387 Net income per share: Basic $ 0.51 $ 0.49 $ 1.45 $ 1.35 Diluted $ 0.51 $ 0.48 $ 1.43 $ 1.32 Weighted average number of shares outstanding: Basic 136,461 137,684 136,002 138,181 Diluted 138,182 140,041 137,584 140,446
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, 2016 and 2015 , were as follows: For the three months For the nine months (in thousands) 2016 2015 2016 2015 Balance as of the beginning of the period $ 73,447 $ 90,113 $ 78,387 $ 75,283 Additions to estimated acquisition earn-out payables 1,437 2,363 3,828 29,496 Payments for estimated acquisition earn-out payables (16,988 ) (12,899 ) (27,555 ) (26,937 ) Subtotal 57,896 79,577 54,660 77,842 Net change in earnings from estimated acquisition earn-out payables: Change in fair value on estimated acquisition earn-out payables 2,883 (365 ) 4,704 (30 ) Interest expense accretion 727 824 2,142 2,224 Net change in earnings from estimated acquisition earn-out payables 3,610 459 6,846 2,194 Balance as of September 30, $ 61,506 $ 80,036 $ 61,506 $ 80,036

Goodwill (Tables)

Goodwill (Tables)	9 Months Ended
	Sep. 30, 2016
Goodwill and Intangible Assets Disclosure [Abstract]
Changes in Carrying Value of Goodwill by Operating Segment	The changes in the carrying value of goodwill by reportable segment for the nine months ended September 30, 2016 are as follows: (in thousands) Retail National Programs Wholesale Brokerage Services Total Balance as of January 1, 2016 $ 1,345,636 $ 901,866 $ 226,961 $ 112,220 $ 2,586,683 Goodwill of acquired businesses 11,854 (1 ) 51,477 22,352 85,682 Goodwill of transferred businesses 571 (571 ) — — — Balance as of September 30, 2016 $ 1,358,061 $ 901,294 $ 278,438 $ 134,572 $ 2,672,365

Amortizable Intangible Assets (

Amortizable Intangible Assets (Tables)	9 Months Ended
	Sep. 30, 2016
Goodwill and Intangible Assets Disclosure [Abstract]
Amortizable Intangible Assets	Amortizable intangible assets at September 30, 2016 and December 31, 2015 consisted of the following: September 30, 2016 December 31, 2015 (in thousands) Gross Carrying Value Accumulated Amortization Net Carrying Value Weighted Average Life (Years)(1) Gross Carrying Value Accumulated Amortization Net Carrying Value Weighted Average Life (Years) (1) Purchased customer accounts $ 1,445,052 $ (720,728 ) $ 724,324 15.0 $ 1,398,986 $ (656,799 ) $ 742,187 15.0 Non-compete agreements 29,635 (27,819 ) 1,816 6.8 29,440 (26,947 ) 2,493 6.8 Total $ 1,474,687 $ (748,547 ) $ 726,140 $ 1,428,426 $ (683,746 ) $ 744,680 (1) Weighted average life calculated as of the date of acquisition.

Long-Term Debt (Tables)

Long-Term Debt (Tables)	9 Months Ended
	Sep. 30, 2016
Debt Disclosure [Abstract]
Long-Term Debt Instrument	Long-term debt at September 30, 2016 and December 31, 2015 consisted of the following: (in thousands) September 30, 2016 December 31, 2015 Current portion of long-term debt: Current portion of 5-year term loan facility expires 2019 $ 55,000 $ 48,125 5.660% senior notes, Series C, semi-annual interest payments, balloon due 2016 25,000 25,000 Short-term promissory note 492 — Total current portion of long-term debt 80,492 73,125 Long-term debt: Note agreements: 4.500% senior notes, Series E, quarterly interest payments, balloon due 2018 100,000 100,000 4.200% senior notes, semi-annual interest payments, balloon due 2024 498,746 498,628 Total notes 598,746 598,628 Credit agreements: 5-year term-loan facility, periodic interest and principal payments, LIBOR plus up to 1.750%, expires May 20, 2019 440,000 481,250 5-year revolving-loan facility, periodic interest payments, currently LIBOR plus up to 1.500% and commitment fees up to 0.250%, expires May 20, 2019 — — Total credit agreements 440,000 481,250 Debt issuance costs (contra) (7,053 ) (8,260 ) Total long-term debt less unamortized discount and debt issuance costs 1,031,693 1,071,618 Current portion of long-term debt 80,492 73,125 Total debt $ 1,112,185 $ 1,144,743

Supplemental Disclosures of C27

Supplemental Disclosures of Cash Flow Information and Non-Cash Financing and Investing Activities (Tables)	9 Months Ended
	Sep. 30, 2016
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) 2016 2015 Cash paid during the period for: Interest $ 33,122 $ 33,091 Income taxes $ 104,739 $ 96,579 Brown & Brown’s significant non-cash investing and financing activities are summarized as follows: For the nine months (in thousands) 2016 2015 Other payable issued for purchased customer accounts $ 10,505 $ 995 Estimated acquisition earn-out payables and related charges $ 3,828 $ 29,497 Notes payable issued or assumed for purchased customer accounts $ 492 $ — Notes received on the sale of fixed assets and customer accounts $ — $ 544

Segment Information (Tables)

Segment Information (Tables)	9 Months Ended
	Sep. 30, 2016
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 agents; and (4) the Services Segment, which provides insurance-related services, including third-party claims administration and comprehensive medical utilization management services in both the workers’ compensation and all-lines liability arenas, as well as Medicare Set-aside services, Social Security disability and Medicare benefits advocacy services and claims adjusting services. Brown & Brown conducts all of its operations within the United States of America, except for a wholesale brokerage operation based in London, England, and retail operations in Bermuda and the Cayman Islands. These operations earned $3.8 million and $3.2 million of total revenues for the three months ended September 30, 2016 and 2015 , respectively. These operations earned $10.3 million and $9.3 million of total revenues for the nine months ended September 30, 2016 and 2015 , respectively. Long-lived assets held outside of the United States as of September 30, 2016 and 2015 were not material. The accounting policies of the reportable segments are the same as those described in Note 1 of the Company’s Annual Report on Form 10-K for the year ended December 31, 2015 . The Company evaluates the performance of its segments based upon revenues and income before income taxes. Inter-segment revenues are eliminated. Summarized financial information concerning the Company’s reportable segments is shown in the following table. The “Other” column includes any income and expenses not allocated to reportable segments, corporate-related items, including the inter-company interest expense charge to the reporting segment, and the elimination of inter-segment activities. For the three months ended September 30, 2016 (in thousands) Retail National Programs Wholesale Brokerage Services Other Total Total revenues $ 228,645 $ 123,632 $ 70,192 $ 39,586 $ 219 $ 462,274 Investment income $ 5 $ 96 $ — $ 57 $ 72 $ 230 Amortization $ 10,861 $ 6,921 $ 2,882 $ 1,140 $ 1 $ 21,805 Depreciation $ 1,508 $ 1,945 $ 503 $ 473 $ 766 $ 5,195 Interest expense $ 9,026 $ 10,844 $ 1,540 $ 1,257 $ (12,784 ) $ 9,883 Income before income taxes $ 44,894 $ 32,319 $ 20,862 $ 5,971 $ 12,926 $ 116,972 Total assets $ 3,652,977 $ 2,933,568 $ 1,053,516 $ 342,360 $ (2,460,394 ) $ 5,522,027 Capital expenditures $ 1,443 $ 2,153 $ 11 $ 80 $ 504 $ 4,191 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 nine months ended September 30, 2016 (in thousands) Retail National Programs Wholesale Brokerage Services Other Total Total revenues $ 695,393 $ 333,522 $ 184,893 $ 117,906 $ 1,251 $ 1,332,965 Investment income $ 33 $ 583 $ 4 $ 204 $ 326 $ 1,150 Amortization $ 32,743 $ 21,011 $ 7,915 $ 3,345 $ 11 $ 65,025 Depreciation $ 4,761 $ 5,881 $ 1,487 $ 1,432 $ 2,306 $ 15,867 Interest expense $ 29,415 $ 34,895 $ 2,472 $ 3,820 $ (40,985 ) $ 29,617 Income before income taxes $ 144,496 $ 68,367 $ 51,711 $ 17,929 $ 46,095 $ 328,598 Total assets $ 3,652,977 $ 2,933,568 $ 1,053,516 $ 342,360 $ (2,460,394 ) $ 5,522,027 Capital expenditures $ 4,664 $ 5,399 $ 925 $ 561 $ 1,586 $ 13,135 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

Investments (Tables)

Investments (Tables)	9 Months Ended
	Sep. 30, 2016
Schedule of Held-to-maturity Securities [Line Items]
Schedule of Investments in Fixed Maturity Securities	At September 30, 2016 , the Company’s amortized cost and fair values of fixed maturity securities are summarized as follows: (in thousands) Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value U.S. Treasury securities, obligations of U.S. Government agencies and Municipals $ 26,787 $ 118 $ (5 ) $ 26,900 Corporate debt 3,129 38 — 3,167 Total $ 29,916 $ 156 $ (5 ) $ 30,067 At December 31, 2015 , the Company’s amortized cost and fair values of fixed maturity securities are summarized as follows: (in thousands) Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value U.S. Treasury securities, obligations of U.S. Government agencies and Municipals $ 11,876 $ 6 $ (26 ) $ 11,856 Foreign government 50 — — 50 Corporate debt 4,505 7 (16 ) 4,496 Short-duration fixed income fund 1,663 27 — 1,690 Total $ 18,094 $ 40 $ (42 ) $ 18,092
Summary of Unrealized Loss Position	he following table shows the investments’ gross unrealized loss and fair value, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position as of September 30, 2016 : Less than 12 Months 12 Months or More Total (in thousands) Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses U.S. Treasury securities, obligations of U.S. Government agencies and Municipals $ 5,102 $ (5 ) $ — $ — $ 5,102 $ (5 ) Corporate debt 701 — 160 — 861 — Total $ 5,803 $ (5 ) $ 160 $ — $ 5,963 $ (5 ) The following table shows the investments’ gross unrealized loss and fair value, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position as of December 31, 2015 : Less than 12 Months 12 Months or More Total (in thousands) Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses U.S. Treasury securities, obligations of U.S. Government agencies and Municipals $ 8,998 $ (26 ) $ — $ — $ 8,998 $ (26 ) Foreign Government 50 — — — 50 — Corporate debt 2,731 (14 ) 284 (2 ) 3,015 (16 ) Total $ 11,779 $ (40 ) $ 284 $ (2 ) $ 12,063 $ (42 )
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, 2016 by contractual maturity are set forth below: (in thousands) Amortized Cost Fair Value Years to maturity: Due in one year or less $ 3,753 $ 3,760 Due after one year through five years 25,833 25,951 Due after five years 330 356 Total $ 29,916 $ 30,067 The amortized cost and estimated fair value of the fixed maturity securities at December 31, 2015 by contractual maturity are set forth below: (in thousands) Amortized Cost Fair Value Years to maturity: Due in one year or less $ 5,726 $ 5,722 Due after one year through five years 12,038 12,041 Due after five years 330 329 Total $ 18,094 $ 18,092

Losses and Loss Adjustment Re30

Losses and Loss Adjustment Reserve (Tables)	9 Months Ended
	Sep. 30, 2016
Reinsurance Disclosures [Abstract]
Effects of Reinsurance on Premiums Written and Earned	The effects of reinsurance on premiums written and earned are as follows: Period from January 1, 2016 to (in thousands) Written Earned Direct premiums $ 472,138 $ 447,813 Ceded premiums (472,124 ) (447,799 ) Net premiums $ 14 $ 14

Nature of Operations - Addition

Nature of Operations - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2016Segment
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of reportable segments	4

Basis of Financial Reporting Ad

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

Basis of Financial Reporting Te

Basis of Financial Reporting Text Block (Details) - USD ($) $ in Thousands	9 Months Ended		12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Text Block [Abstract]
Share-based Compensation	$ 11,593	$ 17,348	$ 15,500

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, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Earnings Per Share [Abstract]
Net income	$ 71,545	$ 67,427	$ 199,865	$ 185,383
Net income attributable to unvested awarded performance stock	(1,873)	(1,565)	(5,210)	(4,370)
Net income attributable to common shares	$ 69,672	$ 65,862	$ 194,655	$ 181,013
Weighted average number of common shares outstanding - basic (in shares)	140,129	140,955	139,642	141,517
Less unvested awarded performance stock included in weighted average number of common shares outstanding - basic (in shares)	(3,668)	(3,271)	(3,640)	(3,336)
Weighted average number of common shares outstanding for basic earnings per common share (in shares)	136,461	137,684	136,002	138,181
Dilutive effect of stock options (in shares)	1,721	2,357	1,582	2,265
Weighted average number of shares outstanding - diluted (in shares)	138,182	140,041	137,584	140,446
Basic (in dollars per share)	$ 0.51	$ 0.48	$ 1.43	$ 1.31
Diluted (in dollars per share)	$ 0.50	$ 0.47	$ 1.41	$ 1.29

Business Combinations - Additio

Business Combinations - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2016USD ($)acquisitioncustomer_account	Sep. 30, 2015USD ($)acquisition	Apr. 01, 2016USD ($)	Jan. 01, 2016USD ($)	Apr. 01, 2015USD ($)	Jan. 01, 2015USD ($)
Business Acquisition [Line Items]
Number of acquisitions | acquisition	6	9
Aggregate purchase price of acquisitions	$ 917,497
Payments to Acquire Businesses, Gross	115,313,000	$ 109,900,000
Goodwill assigned	85,682,000
Goodwill currently deductible for income tax purposes	60,473,000
Goodwill currently non-deductible for income tax purposes	21,381,000
Goodwill related to the recorded earn-out payables	3,828,000
Total revenues related to acquisitions	21,452,000
Income before income taxes related to acquisitions	2,375,000
Estimated acquisition earn-out payables	61,506,000	$ 80,036,000	$ 73,447,000	$ 78,387,000	$ 90,113,000	$ 75,283,000
Accounts payable
Business Acquisition [Line Items]
Estimated acquisition earn-out payables	$ 23,000,000
Purchased customer accounts
Business Acquisition [Line Items]
Weighted average life (years)	15 years
Non-compete agreements
Business Acquisition [Line Items]
Weighted average life (years)	5 years
Services
Business Acquisition [Line Items]
Goodwill assigned	$ 11,854,000
National Programs
Business Acquisition [Line Items]
Goodwill assigned	(1,000)
Wholesale Brokerage
Business Acquisition [Line Items]
Goodwill assigned	51,477,000
Services [Member]
Business Acquisition [Line Items]
Goodwill assigned	22,352,000
Other non-current liability
Business Acquisition [Line Items]
Estimated acquisition earn-out payables	$ 38,500,000
Business Combinations - Asset Deals [Member]
Business Acquisition [Line Items]
Number of acquisitions | acquisition	5
Business Combinations - Stock Deals [Member]
Business Acquisition [Line Items]
Number of acquisitions | customer_account	1

Business Combinations - Acquisi

Business Combinations - Acquisitions Accounted for Business Combinations (Detail) - USD ($)	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Business Combination, Separately Recognized Transactions [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities	$ 9,515,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets	139,653,000
Business Acquisitions Purchase Price Allocation Current Assets Cash And Cash Equivalents	2,094,000
Cash Paid	115,313,000	$ 109,900,000
Business Acquisition Cost of Entity Note Payable	492,000
Other Payable	10,505,000
Recorded Earn-Out Payable	3,828,000
Net Assets Acquired	130,138,000
Maximum Potential Earn- Out Payable	13,722,000
Other current assets	4,277,000
Fixed assets	654,000
Goodwill	85,682,000
Purchased customer accounts	46,751,000
Non-compete agreements	195,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Other	6,285,000
Deferred Tax Liabilities, Net	3,230,000
Services [Member]
Business Combination, Separately Recognized Transactions [Line Items]
Goodwill	22,352,000
Services
Business Combination, Separately Recognized Transactions [Line Items]
Goodwill	11,854,000
National Programs
Business Combination, Separately Recognized Transactions [Line Items]
Goodwill	(1,000)
Wholesale Brokerage
Business Combination, Separately Recognized Transactions [Line Items]
Goodwill	51,477,000
SSAD [Member]
Business Combination, Separately Recognized Transactions [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities	4,947,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets	38,936,000
Business Acquisitions Purchase Price Allocation Current Assets Cash And Cash Equivalents	2,094,000
Net Assets Acquired	33,989,000
Other current assets	1,042,000
Fixed assets	307,000
Goodwill	22,352,000
Purchased customer accounts	13,069,000
Non-compete agreements	72,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Other	1,717,000
Deferred Tax Liabilities, Net	$ 3,230,000
SSAD [Member] | Services [Member]
Business Combination, Separately Recognized Transactions [Line Items]
Effective Date of Acquisition	Feb. 1, 2016
Cash Paid	$ 32,526,000
Business Acquisition Cost of Entity Note Payable	492,000
Other Payable	0
Recorded Earn-Out Payable	971,000
Net Assets Acquired	33,989,000
Maximum Potential Earn- Out Payable	3,000,000
Other Acquisitions [Member]
Business Combination, Separately Recognized Transactions [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities	3,153,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets	19,961,000
Business Acquisitions Purchase Price Allocation Current Assets Cash And Cash Equivalents	0
Net Assets Acquired	16,808,000
Other current assets	753,000
Fixed assets	47,000
Goodwill	11,876,000
Purchased customer accounts	7,201,000
Non-compete agreements	84,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Other	3,153,000
Deferred Tax Liabilities, Net	0
Other Acquisitions [Member] | Various
Business Combination, Separately Recognized Transactions [Line Items]
Cash Paid	16,737,000
Business Acquisition Cost of Entity Note Payable	0
Other Payable	305,000
Recorded Earn-Out Payable	(234,000)
Net Assets Acquired	16,808,000
Maximum Potential Earn- Out Payable	5,722,000
Morstan General Agency, Inc. [Member]
Business Combination, Separately Recognized Transactions [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities	1,415,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets	80,756,000
Net Assets Acquired	79,341,000
Other current assets	2,482,000
Fixed assets	300,000
Goodwill	51,454,000
Purchased customer accounts	26,481,000
Non-compete agreements	39,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Other	1,415,000
Deferred Tax Liabilities, Net	$ 0
Morstan General Agency, Inc. [Member] | Services
Business Combination, Separately Recognized Transactions [Line Items]
Effective Date of Acquisition	Jun. 1, 2016
Cash Paid	$ 66,050,000
Business Acquisition Cost of Entity Note Payable	0
Other Payable	10,200,000
Recorded Earn-Out Payable	3,091,000
Net Assets Acquired	79,341,000
Maximum Potential Earn- Out Payable	$ 5,000,000

Business Combinations - Estimat

Business Combinations - Estimated Fair Values of Aggregate Assets and Liabilities Acquired (Detail) - USD ($)	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Fair Value Of Assets And Liabilities Statement [Line Items]
Business Acquisitions Purchase Price Allocation Current Assets Cash And Cash Equivalents	$ 2,094,000
Payments to Acquire Businesses, Gross	115,313,000	$ 109,900,000
Recorded Earn-Out Payable	3,828,000
Other current assets	4,277,000
Fixed assets	654,000
Goodwill	85,682,000
Purchased customer accounts	46,751,000
Non-compete agreements	195,000
Total assets acquired	139,653,000
Other current liabilities	(6,285,000)
Deferred Tax Liabilities, Net	(3,230,000)
Total liabilities assumed	(9,515,000)
Net assets acquired	130,138,000
Maximum Potential Earn- Out Payable	13,722,000
SSAD [Member]
Fair Value Of Assets And Liabilities Statement [Line Items]
Business Acquisitions Purchase Price Allocation Current Assets Cash And Cash Equivalents	2,094,000
Other current assets	1,042,000
Fixed assets	307,000
Goodwill	22,352,000
Purchased customer accounts	13,069,000
Non-compete agreements	72,000
Total assets acquired	38,936,000
Other current liabilities	(1,717,000)
Deferred Tax Liabilities, Net	(3,230,000)
Total liabilities assumed	(4,947,000)
Net assets acquired	33,989,000
Morstan General Agency, Inc. [Member]
Fair Value Of Assets And Liabilities Statement [Line Items]
Other current assets	2,482,000
Fixed assets	300,000
Goodwill	51,454,000
Purchased customer accounts	26,481,000
Non-compete agreements	39,000
Total assets acquired	80,756,000
Other current liabilities	(1,415,000)
Deferred Tax Liabilities, Net	0
Total liabilities assumed	(1,415,000)
Net assets acquired	79,341,000
Other Acquisitions [Member]
Fair Value Of Assets And Liabilities Statement [Line Items]
Business Acquisitions Purchase Price Allocation Current Assets Cash And Cash Equivalents	0
Other current assets	753,000
Fixed assets	47,000
Goodwill	11,876,000
Purchased customer accounts	7,201,000
Non-compete agreements	84,000
Total assets acquired	19,961,000
Other current liabilities	(3,153,000)
Deferred Tax Liabilities, Net	0
Total liabilities assumed	(3,153,000)
Net assets acquired	16,808,000
Wholesale Brokerage
Fair Value Of Assets And Liabilities Statement [Line Items]
Goodwill	$ 51,477,000

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, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual			$ 21,452
Business Combination Pro Forma Information Income Loss Before Income Taxes Of Acquiree Since Acquisition Date Actual			2,375
Total revenues	$ 462,684	$ 445,672	1,350,014	$ 1,295,027
Income before income taxes	117,144	115,749	332,101	315,824
Net income	$ 71,650	$ 69,171	$ 201,996	$ 190,387
Net income per share:
Basic (in dollars per share)	$ 0.51	$ 0.49	$ 1.45	$ 1.35
Diluted (in dollars per share)	$ 0.51	$ 0.48	$ 1.43	$ 1.32
Weighted Average Basic Shares Outstanding, Pro Forma	136,461	137,684	136,002	138,181
Weighted average number of shares outstanding:
Pro Forma Weighted Average Shares Outstanding, Diluted	138,182	140,041	137,584	140,446

Business Combinations - Addit39

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, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Business Combinations [Abstract]
Additions to estimated acquisition earn-out payables	$ 1,437	$ 2,363	$ 3,828	$ 29,496
Payments for estimated acquisition earn-out payables	(16,988)	(12,899)	(27,555)	(26,937)
Subtotal	57,896	79,577	54,660	77,842
Net change in earnings from estimated acquisition earn-out payables:
Change in fair value on estimated acquisition earn-out payables	2,883	(365)	4,704	(30)
Interest expense accretion	727	824	2,142	2,224
Net change in earnings from estimated acquisition earn-out payables	3,610	459	6,846	2,194
Ending balance	$ 61,506	$ 80,036	$ 61,506	$ 80,036

Goodwill - Changes in Carrying

Goodwill - Changes in Carrying Value of Goodwill by Operating Segment (Detail) $ in Thousands	9 Months Ended
	Sep. 30, 2016USD ($)
Goodwill [Roll Forward]
Beginning balance	$ 2,586,683
Goodwill of acquired businesses	85,682
Goodwill, Transfers	0
Ending balance	2,672,365
Services
Goodwill [Roll Forward]
Beginning balance	1,345,636
Goodwill of acquired businesses	11,854
Goodwill, Transfers	571
Ending balance	1,358,061
National Programs
Goodwill [Roll Forward]
Beginning balance	901,866
Goodwill of acquired businesses	(1)
Goodwill, Transfers	(571)
Ending balance	901,294
Wholesale Brokerage
Goodwill [Roll Forward]
Beginning balance	226,961
Goodwill of acquired businesses	51,477
Goodwill, Transfers	0
Ending balance	278,438
Services
Goodwill [Roll Forward]
Beginning balance	112,220
Goodwill of acquired businesses	22,352
Goodwill, Transfers	0
Ending balance	$ 134,572

Amortizable Intangible Assets -

Amortizable Intangible Assets - Amortizable Intangible Assets (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	$ 1,474,687		$ 1,428,426
Accumulated Amortization	(748,547)		(683,746)
Net Carrying Value	726,140		744,680
Purchased customer accounts
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	1,445,052		1,398,986
Accumulated Amortization	(720,728)		(656,799)
Net Carrying Value	$ 724,324		742,187
Weighted Average Life (Years)	15 years	15 years
Non-compete agreements
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	$ 29,635		29,440
Accumulated Amortization	(27,819)		(26,947)
Net Carrying Value	$ 1,816		$ 2,493
Weighted Average Life (Years)	6 years 9 months 18 days	6 years 9 months 18 days

Amortizable Intangible Assets42

Amortizable Intangible Assets - Additional Information (Detail) $ in Millions	Sep. 30, 2016USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization expense estimated, year one (2015)	$ 86.6
Amortization expense estimated, year two (2016)	84.7
Amortization expense estimated, year three (2017)	79.5
Amortization expense estimated, year four (2018)	75
Amortization expense estimated, year five (2019)	$ 67.6

Long-Term Debt - Long-Term Debt

Long-Term Debt - Long-Term Debt Instrument (Detail) - USD ($)	9 Months Ended	12 Months Ended
	Sep. 30, 2016	Dec. 31, 2015	Jan. 15, 2015	Apr. 16, 2014
Debt Instrument [Line Items]
Total current portion of long-term debt	$ 80,492,000	$ 73,125,000
Total notes	598,746,000	598,628,000
Long-term credit agreements	440,000,000	481,250,000		$ 25,000,000
Debt Issuance Costs, Gross	(7,053,000)	(8,260,000)
Total long-term debt	1,031,693,000	1,071,618,000
Current portion of long-term debt	80,492,000	73,125,000
Total debt	1,112,185,000	1,144,743,000
Notes Payable, Current	492,000	0
5.660% senior notes, Series C, semi-annual interest payments, balloon due 2016
Debt Instrument [Line Items]
Current portion of senior notes	25,000,000	25,000,000	$ 25,000,000
4.500% senior notes, Series E, quarterly interest payments, balloon due 2018
Debt Instrument [Line Items]
Total notes	100,000,000	100,000,000
4.200% senior notes, semi-annual interest payments, balloon due 2024
Debt Instrument [Line Items]
Total notes	498,746,000	498,628,000
5-year term-loan facility, periodic interest and principal payments, LIBOR plus up to 1.75%, expires May 20, 2019
Debt Instrument [Line Items]
Current portion of loan facility	55,000,000	48,125,000
Long-term credit agreements	440,000,000	481,250,000
5-year revolving-loan facility, periodic interest payments, currently LIBOR plus up to 1.50%, plus commitment fees up to 0.25%, expires May 20, 2019
Debt Instrument [Line Items]
Long-term credit agreements	0	$ 0
Revolving Credit Loan Expires In Two Thousand Sixteen [Member]
Debt Instrument [Line Items]
Long-term credit agreements	$ 0
London Interbank Offered Rate (LIBOR) [Member] | 5-year term-loan facility, periodic interest and principal payments, LIBOR plus up to 1.75%, expires May 20, 2019
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	1.75%	1.75%
London Interbank Offered Rate (LIBOR) [Member] | 5-year revolving-loan facility, periodic interest payments, currently LIBOR plus up to 1.50%, plus commitment fees up to 0.25%, expires May 20, 2019
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	1.50%	1.50%

Long-Term Debt - Long-Term De44

Long-Term Debt - Long-Term Debt Instrument (Additional Information) (Detail) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2016	Dec. 31, 2015
Five Year Revolving Loan Facility Expires In Two Thousand Twenty-Two [Member]
Debt Instrument [Line Items]
Line of credit facility, expiration period	5 years	5 years
Line of credit facility, commitment fee percentage	0.25%	0.25%
Line of credit facility, expiration date	May 20, 2019	May 20, 2019
Five Year Revolving Loan Facility Expires In Two Thousand Twenty-Two [Member] | LIBOR
Debt Instrument [Line Items]
Debt instrument, variable interest rate	1.50%	1.50%
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
Five Year Term Loan Facility Expires In Two Thousand Twenty-Two [Member]
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
Five Year Term Loan Facility Expires In Two Thousand Twenty-Two [Member] | LIBOR
Debt Instrument [Line Items]
Debt instrument, variable interest rate	1.75%	1.75%
Five Year Term Loan Facility Expires In Two Thousand Ninteen Current [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage	0.20%	0.20%
Debt instrument maturity year	2,019	2,019
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%
Wells Fargo [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Remaining Borrowing Capacity	$ 800,000	$ 800,000

Long-Term Debt - Narrative (Det

Long-Term Debt - Narrative (Detail)

Sep. 18, 2014USD ($)

May 20, 2014USD ($)extension

Sep. 30, 2016USD ($)

Sep. 30, 2015USD ($)

Dec. 31, 2015USD ($)

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

$ 440,000,000

$ 481,250,000

$ 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

Outstanding debt balance

1,112,185,000

1,144,743,000

Five Year Term Loan Facility Expires In Two Thousand Twenty-Two [Member]

Debt Instrument [Line Items]

Credit facility, outstanding amount

$ 440,000,000

$ 481,250,000

Line of Credit Facility, Expiration Date

May 20, 2019

May 20, 2019

Line of Credit Facility, Expiration Period

5 years

5 years

Five Year Revolving Loan Facility Expires In Two Thousand Twenty-Two [Member]

Debt Instrument [Line Items]

Credit facility, outstanding amount

$ 0

$ 0

Letter of credit fees

0.25%

0.25%

Line of Credit Facility, Expiration Date

May 20, 2019

May 20, 2019

Line of Credit Facility, Expiration Period

5 years

5 years

5.660% senior notes, Series C, semi-annual interest payments, balloon due 2016

Debt Instrument [Line Items]

Current portion of senior notes

$ 25,000,000

$ 25,000,000

$ 25,000,000

Credit Agreement

Debt Instrument [Line Items]

Credit facility, outstanding amount

495,000,000

529,400,000

Number of extension periods | extension

2

Extension period

1 year

Unsecured revolving credit facility

$ 1,350,000,000

First principal payment

13,800,000

Unsecured Senior Notes

Debt Instrument [Line Items]

Debt instrument interest rate stated percentage

4.20%

Debt instrument, face amount

$ 500,000,000

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

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

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%

New Master Agreement

Debt Instrument [Line Items]

Unsecured senior notes outstanding

$ 1,112,185,000

$ 1,144,743,000

LIBOR

Debt Instrument [Line Items]

30-day Adjusted LIBOR Rate

0.56%

LIBOR | Five Year Term Loan Facility Expires In Two Thousand Twenty-Two [Member]

Debt Instrument [Line Items]

Debt instrument, variable interest rate

1.75%

1.75%

LIBOR | Five Year Revolving Loan Facility Expires In Two Thousand Twenty-Two [Member]

Debt Instrument [Line Items]

Debt instrument, variable interest rate

1.50%

1.50%

Minimum | Revolving Credit Facility

Debt Instrument [Line Items]

Facility fee

0.15%

Minimum | LIBOR | Term Loan

Debt Instrument [Line Items]

Debt instrument, variable interest rate

1.00%

Minimum | LIBOR | Line of Credit | Wells Fargo Revolver

Debt Instrument [Line Items]

Debt instrument, variable interest rate

1.00%

Minimum | LIBOR | Revolving Credit Facility

Debt Instrument [Line Items]

Debt instrument, variable interest rate

0.85%

Maximum | Revolving Credit Facility

Debt Instrument [Line Items]

Facility fee

0.25%

Maximum | LIBOR | Term Loan

Debt Instrument [Line Items]

Debt instrument, variable interest rate

1.75%

Maximum | LIBOR | Line of Credit | Wells Fargo Revolver

Debt Instrument [Line Items]

Debt instrument, variable interest rate

1.40%

Maximum | LIBOR | Revolving Credit Facility

Debt Instrument [Line Items]

Debt instrument, variable interest rate

1.50%

Supplemental Disclosures of C46

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, 2016	Sep. 30, 2015
Cash paid during the period for:
Interest	$ 33,122	$ 33,091
Income taxes	104,739	96,579
Significant non-cash investing and financing activities
Other payable issued for purchased customer accounts	10,505	995
Estimated acquisition earn-out payables and related charges	3,828	29,497
Business Acquisition Cost of Entity Note Payable	492	0
Notes received on the sale of fixed assets and customer accounts	$ 0	$ 544

Segment Information - Additiona

Segment Information - Additional Information (Detail) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016USD ($)	Sep. 30, 2015USD ($)	Sep. 30, 2016USD ($)Segment	Sep. 30, 2015USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments | Segment			4
Total revenues	$ 462,274	$ 432,167	$ 1,332,965	$ 1,255,912
London, Bermuda and Cayman Islands
Segment Reporting Information [Line Items]
Total revenues	$ 3,800	$ 3,200

Segment Information - Summarize

Segment Information - Summarized Financial Information Reportable Segments (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Segment Reporting Information [Line Items]
Total revenues	$ 462,274	$ 432,167	$ 1,332,965	$ 1,255,912
Investment income	230	228	1,150	708
Amortization	21,805	22,158	65,025	65,406
Depreciation	5,195	5,215	15,867	15,635
Interest expense	9,883	9,882	29,617	29,404
Income before income taxes	116,972	112,830	328,598	307,522
Total assets	5,522,027	5,002,192	5,522,027	5,002,192	$ 5,004,479
Capital expenditures	4,191	4,176	13,135	12,773
Operating Segments | Services
Segment Reporting Information [Line Items]
Total revenues	228,645	216,249	695,393	657,314
Investment income	5	19	33	62
Amortization	10,861	11,552	32,743	33,671
Depreciation	1,508	1,632	4,761	4,908
Interest expense	9,026	10,121	29,415	30,841
Income before income taxes	44,894	41,785	144,496	137,249
Total assets	3,652,977	3,400,407	3,652,977	3,400,407
Capital expenditures	1,443	1,637	4,664	4,410
Operating Segments | National Programs
Segment Reporting Information [Line Items]
Total revenues	123,632	116,966	333,522	319,577
Investment income	96	49	583	150
Amortization	6,921	7,133	21,011	21,343
Depreciation	1,945	1,850	5,881	5,372
Interest expense	10,844	13,398	34,895	42,306
Income before income taxes	32,319	25,281	68,367	48,567
Total assets	2,933,568	2,542,619	2,933,568	2,542,619
Capital expenditures	2,153	1,754	5,399	5,004
Operating Segments | Wholesale Brokerage
Segment Reporting Information [Line Items]
Total revenues	70,192	61,374	184,893	168,619
Investment income	0	3	4	148
Amortization	2,882	2,441	7,915	7,296
Depreciation	503	506	1,487	1,630
Interest expense	1,540	200	2,472	645
Income before income taxes	20,862	22,276	51,711	53,150
Total assets	1,053,516	880,454	1,053,516	880,454
Capital expenditures	11	425	925	2,087
Operating Segments | Services
Segment Reporting Information [Line Items]
Total revenues	39,586	37,980	117,906	111,128
Investment income	57	0	204	1
Amortization	1,140	1,022	3,345	3,067
Depreciation	473	474	1,432	1,533
Interest expense	1,257	1,527	3,820	4,722
Income before income taxes	5,971	6,022	17,929	16,062
Total assets	342,360	296,659	342,360	296,659
Capital expenditures	80	233	561	774
Other
Segment Reporting Information [Line Items]
Total revenues	219	(402)	1,251	(726)
Investment income	72	157	326	347
Amortization	1	10	11	29
Depreciation	766	753	2,306	2,192
Interest expense	(12,784)	(15,364)	(40,985)	(49,110)
Income before income taxes	12,926	17,466	46,095	52,494
Total assets	(2,460,394)	(2,117,947)	(2,460,394)	(2,117,947)
Capital expenditures	$ 504	$ 127	$ 1,586	$ 498

Investments - Schedule of Inves

Investments - Schedule of Investments in Fixed Maturity Securities (Detail) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Debt Maturities, Single Maturity Date	$ 9,500
Cost	29,916	$ 18,094
Gross Unrealized Gains	156	40
Gross Unrealized Losses	(5)	(42)
Fair Value	30,067	18,092
U.S. Treasury securities, obligations of U.S. Government agencies and Municipals
Schedule of Available-for-sale Securities [Line Items]
Cost	26,787	11,876
Gross Unrealized Gains	118	6
Gross Unrealized Losses	(5)	(26)
Fair Value	26,900	11,856
Foreign government
Schedule of Available-for-sale Securities [Line Items]
Cost		50
Gross Unrealized Gains		0
Gross Unrealized Losses		0
Fair Value		50
Corporate debt
Schedule of Available-for-sale Securities [Line Items]
Cost	3,129	4,505
Gross Unrealized Gains	38	7
Gross Unrealized Losses	0	(16)
Fair Value	$ 3,167	4,496
Short duration fixed income fund
Schedule of Available-for-sale Securities [Line Items]
Cost		1,663
Gross Unrealized Gains		27
Fair Value		$ 1,690

Investments - Summary of Unreal

Investments - Summary of Unrealized Loss Position (Detail) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Schedule of Available-for-sale Securities [Line Items]
Fair Value, Less than 12 Months	$ 5,803	$ 11,779
Unrealized Losses, Less than 12 Months	(5)	(40)
Fair Value, 12 Months or More	160	284
Unrealized Losses, 12 Months or More	0	(2)
Fair Value	5,963	12,063
Unrealized Losses	(5)	(42)
U.S. Treasury securities, obligations of U.S. Government agencies and Municipals
Schedule of Available-for-sale Securities [Line Items]
Fair Value, Less than 12 Months	5,102	8,998
Unrealized Losses, Less than 12 Months	(5)	(26)
Fair Value, 12 Months or More	0	0
Unrealized Losses, 12 Months or More	0	0
Fair Value	5,102	8,998
Unrealized Losses	(5)	(26)
Foreign government
Schedule of Available-for-sale Securities [Line Items]
Fair Value, Less than 12 Months		50
Unrealized Losses, Less than 12 Months		0
Fair Value, 12 Months or More		0
Unrealized Losses, 12 Months or More		0
Fair Value		50
Unrealized Losses		0
Corporate debt
Schedule of Available-for-sale Securities [Line Items]
Fair Value, Less than 12 Months	701	2,731
Unrealized Losses, Less than 12 Months	0	(14)
Fair Value, 12 Months or More	160	284
Unrealized Losses, 12 Months or More	0	(2)
Fair Value	861	3,015
Unrealized Losses	$ 0	$ (16)

Investments - Additional Inform

Investments - Additional Information (Detail) $ in Millions	9 Months Ended
	Sep. 30, 2016USD ($)Securities	Dec. 31, 2015Securities
Schedule of Available-for-sale Securities [Line Items]
Number of securities in unrealized loss position | Securities	10	35
Proceeds from sale of investment in fixed maturity securities	$ 4.7
Investment security maturity date, start	Jan. 1, 2016
Investment security maturity date, End	Sep. 30, 2016
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, 2016	Dec. 31, 2015
Amortized Cost
Due in one year or less	$ 3,753	$ 5,726
Due after one year through five years	25,833	12,038
Due after five years through ten years	330	330
Amortized Cost, Total	29,916	18,094
Fair Value
Due in one year or less	3,760	5,722
Due after one year through five years	25,951	12,041
Due after five years through ten years	356	329
Fair Value, Total	$ 30,067	$ 18,092

Losses and Loss Adjustment Re53

Losses and Loss Adjustment Reserve - Effects of Reinsurance on Premiums Written and Earned (Detail) $ in Thousands	9 Months Ended
	Sep. 30, 2016USD ($)
Written
Direct premiums	$ 472,138
Ceded premiums	(472,124)
Net premiums	14
Earned
Direct premiums	447,813
Ceded premiums	(447,799)
Net premiums	$ 14

Losses and Loss Adjustment Re54

Losses and Loss Adjustment Reserve - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2016USD ($)Reinsurer	Dec. 31, 2015USD ($)
Reinsurance Premiums for Insurance Companies, by Product Segment [Line Items]
Ceded rate of premiums under insurance program	100.00%
Premiums written net	$ 472,124,000
Ceded unpaid loss	332,000,000
Prepaid reinsurance premiums	333,967,000	$ 309,643,000
Increase (Decrease) in Loss and Loss Adjustment Expense Reserve	0
Reserve for losses and loss adjustment expense	$ 332,000,000
Number of reinsurers | Reinsurer	2
Wright Flood
Reinsurance Premiums for Insurance Companies, by Product Segment [Line Items]
Ceded rate of premiums under insurance program	100.00%
Expenses and allowance rate received in premiums	30.90%
Premiums written net	$ 470,900,000
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	$ 1,200,000

Statutory Financial Informati55

Statutory Financial Information - Additional Information (Detail) - Wright Flood	9 Months Ended
	Sep. 30, 2016USD ($)
Statutory Accounting Practices [Line Items]
Statutory capital and surplus required	$ 7,500,000
Statutory capital and surplus	22,000,000
Statutory net Income	$ 6,700,000

Subsidiary Dividend Restricti56

Subsidiary Dividend Restrictions - Additional Information (Detail) - Wright Flood $ in Millions	9 Months Ended
	Sep. 30, 2016USD ($)
Dividend Restrictions [Line Items]
Dividend rate as a percentage of net income	100.00%
Ordinary dividends payment description	The maximum amount of ordinary dividends that Wright Flood can pay to shareholders in a rolling twelve month period is limited to the greater of 10% of statutory adjusted capital and surplus as shown on Wright Flood’s last annual statement on file with the superintendent or 100% of adjusted net income.
Maximum dividend payout that may be made without prior approval	$ 4.1
Maximum
Dividend Restrictions [Line Items]
Dividend rate as a percentage of net income	10.00%

Shareholders' Equity - Addition

Shareholders' Equity - Additional Information (Detail) - USD ($)	Sep. 30, 2016	Jan. 06, 2016	Dec. 31, 2015	Nov. 11, 2015	Aug. 11, 2015	Jul. 20, 2015	Mar. 05, 2015
Accelerated Share Repurchases [Line Items]
Shares repurchased, authorized amount	$ 250,000,000				$ 50,000,000	$ 400,000,000
Shares repurchased, number of shares received initially (in shares)	7,793,579		7,430,370		3,059,629
Fair value of common stock repurchased	$ 250,025,000		$ 238,775,000
Third Accelerated Share Repurchase Program [Member]
Accelerated Share Repurchases [Line Items]
Shares repurchased, authorized amount		$ 375,000,000
Shares repurchased, aggregate repurchase amount				$ (75,000,000)
Shares repurchased, number of shares received initially (in shares)		363,209		1,985,981
Fair value of common stock repurchased				$ 63,750,000
Accelerated Share Repurchase Agreement [Member]
Accelerated Share Repurchases [Line Items]
Shares repurchased, number of shares received initially (in shares)	7,793,579
Second Accelerated Share Repurchase Agreement
Accelerated Share Repurchases [Line Items]
Shares repurchased, aggregate repurchase amount							$ 100,000,000
Shares repurchased, number of shares received initially (in shares)					391,637		2,667,992
Fair value of common stock repurchased							$ 85,000,000
Repurchase Agreements [Member]
Accelerated Share Repurchases [Line Items]
Shares repurchased, authorized amount	$ 100,000,000