Brown & Brown (BRO) 10-Q/A 18 Aug 17 2017 Q2 Quarterly report (amended) Financial data

Document and Entity Information

Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2017	Aug. 01, 2017
Document And Entity Information [Abstract]
Document Type	10-Q/A
Amendment Flag	true
Amendment Description	Updated XBRL
Document Period End Date	Jun. 30, 2017
Document Fiscal Year Focus	2,017
Document Fiscal Period Focus	Q2
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		139,920,874

CONDENSED CONSOLIDATED STATEMEN

CONDENSED CONSOLIDATED STATEMENTS OF INCOME (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
REVENUES
Commissions and fees	$ 464,724	$ 445,662	$ 909,290	$ 867,997
Investment income	351	502	594	920
Other income, net	1,230	354	21,501	1,774
Total revenues	466,305	446,518	931,385	870,691
EXPENSES
Employee compensation and benefits	244,517	231,102	490,383	455,161
Other operating expenses	71,312	66,291	138,231	129,896
Loss/(gain) on disposal	9	(810)	(91)	(2,854)
Amortization	21,347	21,610	42,967	43,220
Depreciation	5,655	5,354	11,753	10,672
Interest	9,874	9,837	19,556	19,734
Change in estimated acquisition earn-out payables	5,589	4,057	9,617	3,236
Total expenses	358,303	337,441	712,416	659,065
Income before income taxes	108,002	109,077	218,969	211,626
Income taxes	41,900	42,827	82,757	83,306
Net income	$ 66,102	$ 66,250	$ 136,212	$ 128,320
Net income per share:
Basic (in dollars per share)	$ 0.47	$ 0.47	$ 0.97	$ 0.92
Diluted (in dollars per share)	0.46	0.47	0.96	0.91
Dividends declared per share (in dollars per share)	$ 0.1350	$ 0.12	$ 0.2700	$ 0.245

CONDENSED CONSOLIDATED BALANCE

CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Current Assets:
Cash and cash equivalents	$ 600,296	$ 515,646
Restricted cash and investments	276,634	265,637
Short-term investments	30,164	15,048
Premiums, commissions and fees receivable	499,670	502,482
Reinsurance recoverable	22,479	78,083
Prepaid reinsurance premiums	297,736	308,661
Other current assets	51,953	50,571
Total current assets	1,778,932	1,736,128
Fixed assets, net	72,747	75,807
Goodwill	2,692,104	2,675,402
Amortizable intangible assets, net	671,874	707,454
Investments	10,876	23,048
Other assets	52,476	44,895
Total assets	5,279,009	5,262,734
Current Liabilities:
Premiums payable to insurance companies	706,923	647,564
Losses and loss adjustment reserve	22,479	78,083
Unearned premiums	297,736	308,661
Premium deposits and credits due customers	92,217	83,765
Accounts payable	103,211	69,595
Accrued expenses and other liabilities	176,971	201,989
Current portion of long-term debt	20,000	55,500
Total current liabilities	1,419,537	1,445,157
Long-term debt less unamortized discount and debt issuance costs	965,391	1,018,372
Deferred income taxes, net	373,089	357,686
Other liabilities	62,759	81,308
Shareholders’ Equity:
Common stock, par value $0.10 per share; authorized 280,000 shares; issued 148,264 shares and outstanding 139,999 shares at 2017, issued 148,107 shares and outstanding 140,104 shares at 2016	14,826	14,811
Additional paid-in capital	479,193	468,443
Treasury stock, at cost at 8,265 at 2017 and 8,003 shares at 2016, respectively	(268,842)	(257,683)
Retained earnings	2,233,056	2,134,640
Total shareholders’ equity	2,458,233	2,360,211
Total liabilities and shareholders’ equity	$ 5,279,009	$ 5,262,734

CONDENSED CONSOLIDATED BALANCE4

CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED) (Parenthetical) - $ / shares	Jun. 30, 2017	Dec. 31, 2016
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)	148,263,534	148,107,038
Common stock, shares outstanding (in shares)	139,998,722	140,103,841
Treasury stock shares (in shares)	8,264,812	8,003,197

CONDENSED CONSOLIDATED STATEME5

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016	Dec. 31, 2015
Cash and Cash Equivalents [Line Items]
Document Period End Date			Jun. 30, 2017
Cash, Cash Equivalents and Restricted Cash			$ 876,930	$ 731,585	$ 781,283	$ 673,173
Cash flows from operating activities:
Net income	$ 66,102	$ 66,250	136,212	128,320
Adjustments to reconcile net income to net cash provided by operating activities:
Amortization	21,347	21,610	42,967	43,220
Depreciation	5,655	5,354	11,753	10,672
Non-cash stock-based compensation			15,326	6,674
Change in estimated acquisition earn-out payables	5,589	4,057	9,617	3,236
Deferred income taxes			14,793	15,907
Amortization of debt discount			79	79
Deferred Finance Costs, Own-share Lending Arrangement, Issuance Costs, Amortization Expense			943	807
Accretion (Amortization) of Discounts and Premiums, Investments			13	47
Income tax benefit from exercise of shares from the stock benefit plans			0	(6,816)
Payments On Acquisition Earn Outs In Excess Of Original Estimated Payables			(7,109)	(3,550)
Net loss/(gain) on sales of investments, fixed assets and customer accounts			136	(2,700)
Changes in operating assets and liabilities, net of effect from acquisitions and divestitures:
Premiums, commissions and fees receivable decrease (increase)			2,918	(34,099)
Reinsurance recoverables decrease (increase)			55,604	(28,844)
Prepaid reinsurance premiums decrease			10,925	10,736
Other assets (increase)			(9,326)	(11,272)
Premiums payable to insurance companies decrease			59,219	90,068
Premium deposits and credits due customers increase			8,500	12,049
Losses and loss adjustment reserve (decrease) increase			(55,604)	28,844
Unearned premiums (decrease)			(10,925)	(10,736)
Accounts payable increase			38,510	34,156
Accrued expenses and other liabilities (decrease)			(26,021)	(29,765)
Other liabilities (decrease)			(28,449)	(18,346)
Net cash provided by operating activities			270,081	238,687
Cash flows from investing activities:
Additions to fixed assets	(5,816)	(4,692)	(8,848)	(8,944)
Payments for businesses acquired, net of cash acquired			(11,526)	(107,290)
Proceeds from sales of fixed assets and customer accounts			669	3,291
Purchases of investments			(5,916)	(16,405)
Proceeds from Sale, Maturity and Collection of Investments			2,911	9,379
Net cash used in investing activities			(22,710)	(119,969)
Cash flows from financing activities:
Payments on acquisition earn-outs			(8,668)	(7,012)
Payments on long-term debt			(86,750)	(20,625)
Income tax benefit from exercise of shares from the stock benefit plans			0	6,816
Issuances of common stock for employee stock benefit plans			500	916
Repurchase Of Stock Benefit Plan Shares For Employees To Fund Tax Withholdings			(5,054)	(6,273)
Purchase of treasury stock			(11,159)	(11,250)
Settlement of accelerated share repurchase program			0	11,250
Cash dividends paid			(37,840)	(34,128)
Net cash used in financing activities			(151,724)	(60,306)
Payments of Debt Issuance Costs			(2,753)
Net increase in cash and cash equivalents inclusive of restricted cash			95,647	58,412
Cash and cash equivalents inclusive of restricted cash at end of period	$ 600,296	$ 453,939	$ 600,296	$ 453,939	$ 515,646	$ 443,420

Nature of Operations

Nature of Operations	6 Months Ended
	Jun. 30, 2017
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, casualty and employee benefits areas. 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 and quasi-public entities, 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, including 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.

Basis of Financial Reporting

Basis of Financial Reporting	6 Months Ended
	Jun. 30, 2017
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 generally accepted accounting principles in the United States of America (“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, 2016 . 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. Recently Issued Accounting Pronouncements In November 2016, the Financial Accountings Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2016-18, “Statement of Cash Flows (Topic 230)”: Restricted Cash (“ASU 2016-18”), which requires that the Statement of Cash Flows explain the changes during the period of cash and cash equivalents inclusive of amounts categorized as restricted cash. ASU 2016-18 is effective for periods beginning after December 15, 2017; however, the Company elected to early adopt for the reporting period ended March 31, 2017 under the full retrospective approach for all periods presented. With the adoption of ASU 2016-18, the change in restricted cash is no longer reflected as a change in operating assets and liabilities, and the Statement of Cash Flows details the changes in the balance of cash and cash equivalents inclusive of restricted cash. Net cash provided by operating activities for the six months ended June 30, 2016 were previously reported as $190.8 million. With the retrospective adoption, the net cash provided by operating activities for the six months ended June 30, 2016 is now reported as $238.7 million. The Company reflects cash collected from customers that is payable to insurance companies as restricted cash if segregation of this cash is required by the state of domicile for the office conducting this transaction or if required by contract with the relevant insurance company providing coverage. Cash collected from customers that is payable to insurance companies is reported in cash and cash equivalents if no such restriction is required. 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 has evaluated the impact of ASU 2016-15 and has determined there is no impact on the Company's Statement of Cash Flows. The Company already presents cash paid on contingent consideration in business combination as prescribed by ASU 2016-15 and does not, at this time, engage in the other activities being addressed. 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 adopted the guidance on January 1, 2017, as required. Prior periods have not been adjusted, as the guidance was adopted prospectively. The principal impact is that the tax benefit or expense from stock compensation is now presented in the income tax line of the Statement of Income whereas the prior treatment was to present this as a component of equity on the Balance Sheet. Also the tax benefit or expense is now presented as activity in Cash Flow from Operating Activity rather than the prior presentation as Cash Flow from Financing Activity in the Statement of Cash Flows. The Company also continues to estimate forfeitures of stock grants as allowed by ASU 2016-09. 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 contemporaneous with ASU 2014-09 beginning January 1, 2018. The impact of ASU 2016-08 is currently being evaluated along with ASU 2014-09. At this point in our evaluation the potential impact would primarily be limited to the claims administering activities within our Services Segment and therefore not material to the Company. 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 continues to evaluate the impact of this pronouncement with the principal impact being that the present value of the remaining lease payments be presented as a liability on the Balance Sheet as well as an asset of similar value representing the “Right of Use” for those leased properties. As detailed in Note 13 of the 2016 10-K, the undiscounted contractual cash payments remaining on leased properties is $204.2 million as of June 30, 2017. 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 adopted the guidance on January 1, 2017, as required. As a result, the Company retrospectively applied the guidance to the 2016 balance sheet by reclassifying $24.6 million from deferred income taxes (asset) to deferred income taxes, net (liability) on the Condensed Consolidated Balance Sheet. In May 2014, FASB issued ASU No. 2014-09, “Revenue from Contracts with Customers” (“ASU 2014-09”), which provides guidance for revenue recognition. ASU 2014-09 affects any entity that either enters into contracts with customers to transfer goods or services or enters into contracts for the transfer of non-financial assets, and supersedes the revenue recognition requirements in Topic 605, “Revenue Recognition,” and most industry-specific guidance. The standard’s core principle is that a company will recognize revenue when it transfers promised goods or services to customers in an amount that reflects the consideration to which a company expects to be entitled in exchange for those goods or services. In doing so, companies will need to use more judgment and make more estimates than under the current guidance. Specifically, in situations where multiple performance obligations exist within the contract, the use of estimates is required to allocate the transaction price to each separate performance obligation. Historically, approximately 70% of the Company’s commissions and fees revenue is in the form of commissions paid by insurance carriers. These commissions are earned upon the effective date of bound coverage, and no significant performance obligation remains after coverage is bound. Approximately 20% of the commissions and fees revenue is in the form of fees, which the Company has evaluated and determined that only a small portion will be affected. The remaining revenue streams are currently being evaluated, and this evaluation will be concluded in the third quarter. Fees are predominantly in our National Programs and Services Segments, and to a lesser extent in the large accounts business within our Retail Segment. At the conclusion of this evaluation, it may be determined that fee revenue from certain agreements will be recognized in earlier periods under the new guidance in comparison to our current accounting policies and others will be recognized in later periods. Based upon the work completed to date, management does not expect the overall impact to be material on a full-year basis, but may impact the timing of recognition between quarters. Additionally, management is evaluating the requirement per Accounting Standard Codification 340-40 ("ASC 340-40") to defer customer acquisition and contract fulfillment costs, and recognize these costs as the associated performance obligations are fulfilled. This evaluation includes evaluating the costs that would qualify for deferral as well as the timing of recognition of these costs in future periods. All customer acquisition and contract fulfillment costs are expensed as incurred today. ASU 2014-09 is effective for the Company beginning January 1, 2018, after FASB voted to delay the effective date by one year. At that time, the Company may adopt the new standard under the full retrospective approach or the modified retrospective approach. We do not anticipate a material change in our internal control framework necessitated by the adoption of ASU 2014-09.

Net Income Per Share

Net Income Per Share	6 Months Ended
	Jun. 30, 2017
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 restricted shares) 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 six months (in thousands, except per share data) 2017 2016 2017 2016 Net income $ 66,102 $ 66,250 $ 136,212 $ 128,320 Net income attributable to unvested awarded performance stock (1,642 ) (1,896 ) (3,329 ) (3,337 ) Net income attributable to common shares $ 64,460 $ 64,354 $ 132,883 $ 124,983 Weighted average number of common shares outstanding – basic 140,173 139,998 140,143 139,395 Less unvested awarded performance stock included in weighted average number of common shares outstanding – basic (3,481 ) (4,006 ) (3,425 ) (3,625 ) Weighted average number of common shares outstanding for basic earnings per common share 136,692 135,992 136,718 135,770 Dilutive effect of stock options 2,409 1,589 2,346 1,490 Weighted average number of shares outstanding – diluted 139,101 137,581 139,064 137,260 Net income per share: Basic $ 0.47 $ 0.47 $ 0.97 $ 0.92 Diluted $ 0.46 $ 0.47 $ 0.96 $ 0.91

Business Combinations

Business Combinations	6 Months Ended
	Jun. 30, 2017
Business Combinations [Abstract]
Business Combinations	Business Combinations During the six months ended June 30, 2017 , Brown & Brown acquired the assets and assumed certain liabilities of three 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. The recorded purchase price for all acquisitions included an estimation of the fair value of liabilities associated with any potential earn-out provisions. Subsequent changes in the fair value of earn-out obligations will be recorded in the Condensed Consolidated Statement of Income when incurred. The fair value of earn-out obligations is based on the present value of the expected future payments to be made to the sellers of the acquired businesses in accordance with the provisions outlined in the respective purchase agreements. In determining fair value, the acquired business’s future performance is estimated using financial projections developed by management for the acquired business and reflects market participant assumptions regarding revenue growth and/or profitability. The expected future payments are estimated on the basis of the earn-out formula and performance targets specified in each purchase agreement compared to the associated financial projections. These payments are then discounted to present value using a risk-adjusted rate that takes into consideration the likelihood that the forecasted earn-out payments will be made. Based on the acquisition date and the complexity of the underlying valuation work, certain amounts included in the Company’s Condensed Consolidated Financial Statements may be provisional and thus subject to further adjustments within the permitted measurement period, as defined in ASC 805. For the six months ended June 30, 2017 , several adjustments were made within the permitted measurement period that resulted in an increase in the aggregate purchase price of the affected acquisitions of $1.4 million relating to the assumption of certain liabilities. These measurement period adjustments have been reflected as current period adjustments in the six months ended June 30, 2017 in accordance with the guidance in ASU 2015-16 “Business Combinations”. The measurement period adjustments primarily impacted goodwill, with no effect on earnings or cash in the current period. Cash paid for acquisitions was $ 11.5 million and $ 109.4 million in the six -month periods ended June 30, 2017 and 2016 , respectively. We completed three acquisitions (excluding book of business purchases) in the six -month period ended June 30, 2017 . We completed five acquisitions (excluding book of business purchases) in the six -month period ended June 30, 2016 . The following table summarizes the purchase price allocations made as of the date of each acquisition for current year acquisitions and adjustments made during the measurement period for prior year acquisitions. 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. These adjustments are 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 Other Payable Recorded Earn-Out Payable Net Assets Acquired Maximum Potential Earn- Out Payable Other Various Various 11,526 11,069 282 22,877 3,305 Total $ 11,526 $ 11,069 $ 282 $ 22,877 $ 3,305 The following table summarizes the estimated fair values of the aggregate assets and liabilities acquired as of the date of each acquisition and adjustments made during the measurement period of the prior year acquisitions. (in thousands) Other Total Other current assets 93 93 Fixed assets 35 35 Goodwill 16,702 16,702 Purchased customer accounts 7,279 7,279 Non-compete agreements 552 552 Total assets acquired 24,661 24,661 Other current liabilities (1,095 ) (1,095 ) Deferred income tax, net (689 ) (689 ) Total liabilities assumed (1,784 ) (1,784 ) Net assets acquired $ 22,877 $ 22,877 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 $16.7 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 $7.9 million , $7.3 million , $0.8 million and $0.7 million , respectively. Of the total goodwill of $16.7 million , the amount currently deductible for income tax purposes is $16.4 million and the remaining $0.3 million relates to the recorded earn-out payables and will not be deductible until it is earned and paid. For the acquisitions completed during 2017, the results of operations since the acquisition dates have been combined with those of the Company. The total revenues from the acquisitions completed through June 30, 2017 , included in the Condensed Consolidated Statement of Income for the three and six months ended June 30, 2017 , were $0.5 million and $0.5 million , respectively. The income before income taxes, including the intercompany cost of capital charge, from the acquisitions completed through June 30, 2017 , included in the Condensed Consolidated Statement of Income for the three and six months ended June 30, 2017 , were $0.1 million and $0.1 million , respectively. If the acquisitions had occurred as of the beginning of the respective periods, the Company’s results of operations would be as shown in the following table. These unaudited pro forma results are not necessarily indicative of the actual results of operations that would have occurred had the acquisitions actually been made at the beginning of the respective periods. (UNAUDITED) For the three months For the six months (in thousands, except per share data) 2017 2016 2017 2016 Total revenues $ 467,369 $ 448,362 $ 934,477 $ 874,344 Income before income taxes $ 108,412 $ 109,736 $ 220,119 $ 212,932 Net income $ 66,353 $ 66,650 $ 136,916 $ 129,113 Net income per share: Basic $ 0.47 $ 0.48 $ 0.98 $ 0.93 Diluted $ 0.47 $ 0.47 $ 0.96 $ 0.92 Weighted average number of shares outstanding: Basic 136,692 135,992 136,718 135,770 Diluted 139,101 137,581 139,064 137,260 As of June 30, 2017 and 2016 , the fair values of the estimated acquisition earn-out payables were re-evaluated and measured at fair value on a recurring basis using unobservable inputs (Level 3) as defined in ASC 820- Fair Value Measurement . The resulting additions, payments, and net changes, as well as the interest expense accretion on the estimated acquisition earn-out payables, for the three and six months ended June 30, 2017 and 2016 , were as follows: For the three months For the six months (in thousands) 2017 2016 2017 2016 Balance as of the beginning of the period $ 57,408 $ 69,095 $ 63,821 $ 78,387 Additions to estimated acquisition earn-out payables 493 1,787 282 2,393 Payments for estimated acquisition earn-out payables (5,547 ) (1,485 ) (15,777 ) (10,562 ) Subtotal 52,354 69,397 48,326 70,218 Net change in earnings from estimated acquisition earn-out payables: Change in fair value on estimated acquisition earn-out payables 4,851 3,385 8,186 1,822 Interest expense accretion 738 672 1,431 1,414 Net change in earnings from estimated acquisition earn-out payables 5,589 4,057 9,617 3,236 Balance as of June 30, $ 57,943 $ 73,454 $ 57,943 $ 73,454 Of the $57.9 million estimated acquisition earn-out payables as of June 30, 2017 , $44.0 million was recorded as accounts payable and $13.9 million was recorded as other non-current liabilities. As of June 30, 2017 , the maximum future acquisition contingency payments related to all acquisitions was $100.2 million inclusive of the $57.9 million estimated acquisition earn-out payables as of June 30, 2017 . 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	6 Months Ended
	Jun. 30, 2017
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, 2016, and identified no impairment as a result of the evaluation. The changes in the carrying value of goodwill by reportable segment for the six months ended June 30, 2017 are as follows: (in thousands) Retail National Programs Wholesale Brokerage Services Total Balance as of January 1, 2017 $ 1,354,667 $ 901,294 $ 284,869 $ 134,572 $ 2,675,402 Goodwill of acquired businesses 7,929 7,314 770 689 16,702 Balance as of June 30, 2017 $ 1,362,596 $ 908,608 $ 285,639 $ 135,261 $ 2,692,104

Amortizable Intangible Assets

Amortizable Intangible Assets	6 Months Ended
	Jun. 30, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
Amortizable Intangible Assets	Amortizable Intangible Assets Amortizable intangible assets at June 30, 2017 and December 31, 2016 consisted of the following: June 30, 2017 December 31, 2016 (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 $ 1,454,377 $ (784,097 ) $ 670,280 15.0 $ 1,447,680 $ (741,770 ) $ 705,910 15.0 Non-compete agreements 30,220 (28,626 ) 1,594 6.8 29,668 (28,124 ) 1,544 6.8 Total $ 1,484,597 $ (812,723 ) $ 671,874 $ 1,477,348 $ (769,894 ) $ 707,454 (1) Weighted average life calculated as of the date of acquisition. Amortization expense for amortizable intangible assets for the years ending December 31, 2017 , 2018 , 2019 , 2020 and 2021 is estimated to be $85.2 million , $80.2 million , $75.7 million , $68.3 million , and $65.1 million , respectively.

Long-Term Debt

Long-Term Debt	6 Months Ended
	Jun. 30, 2017
Debt Disclosure [Abstract]
Long-Term Debt	Long-Term Debt Long-term debt at June 30, 2017 and December 31, 2016 consisted of the following: (in thousands) June 30, December 31, 2016 Current portion of long-term debt: Current portion of 5-year term loan facility expires June 28, 2022 $ 20,000 $ 55,000 Short-term promissory note — 500 Total current portion of long-term debt 20,000 55,500 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, net of the unamortized discount, balloon due 2024 498,865 498,785 Total notes 598,865 598,785 Credit agreements: 5-year term-loan facility, periodic interest and principal payments, LIBOR plus up to 1.750%, expires June 28, 2022 375,000 426,250 5-year revolving-loan facility, periodic interest payments, currently LIBOR plus up to 1.500%, plus commitment fees up to 0.250%, expires June 28, 2022 — — Total credit agreements 375,000 426,250 Debt issuance costs (contra) (8,474 ) (6,663 ) Total long-term debt less unamortized discount and debt issuance costs 965,391 1,018,372 Current portion of long-term debt 20,000 55,500 Total debt $ 985,391 $ 1,073,872 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 Senior Notes were redeemed at maturity using cash proceeds to pay off the principal of $25.0 million plus any remaining accrued interest. On December 22, 2016, the Series C Senior Notes were redeemed at maturity using cash proceeds to pay off the principal of $25.0 million plus any remaining accrued interest. As of June 30, 2017 , there was an outstanding debt balance issued under the provisions of the Master Agreement of $100.0 million . 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 Insurance Group, LLC (“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. On June 28, 2017, the Company entered into an amended and restated credit agreement (the “Amended and Restated Credit Agreement”) with the lender named therein, JPMorgan Chase Bank, N.A. as administrative agent and certain other banks as co-syndication agents and co-documentation agents. The Amended and Restated Credit Agreement amended and restated the credit agreement dated April 17, 2014, among such parties (the “Original Credit Agreement”). The Amended and Restated Credit Agreement extends the applicable maturity date of the existing revolving credit facility (the “Facility”) of $800.0 million to June 28, 2022 and re-evidences unsecured term loans at $400.0 million while also extending the applicable maturity date to June 28, 2022. The term loan principal amortization schedule was reset with payments due quarterly. At the time of the execution of the Amended and Restated Credit Agreement, $67.5 million of principal from the original unsecured term loans was repaid using operating cash balances, and the Company added an additional $2.7 million in debt issuance costs related to the facility to the Consolidated Balance Sheet. The Company also expensed to the Consolidated Statements of Income $0.2 million of debt issuance costs related to the Original Credit Agreement due to certain lenders exiting prior to the modified agreement, while also carrying forward $1.6 million on the Consolidated Balance Sheet the unamortized portion of the Original Credit Agreement debt issuance costs which will amortize over the term of the Amended and Restated Credit Agreement. On June 30, 2017, a scheduled principal payment of $5.0 million was satisfied per the terms of the Amended and Restated Credit Agreement. As of June 30, 2017, there was an outstanding debt balance issued under the terms of the Amended and Restated Credit Agreement of $395.0 million with no borrowings outstanding against the revolving loan. Per the terms of the Amended and Restated Credit Agreement, a scheduled principal payment of $5.0 million is due September 30, 2017. On September 18, 2014, the Company issued $500.0 million of 4.200% unsecured senior notes due in 2024 . The senior notes were given investment grade ratings of BBB-/Baa3 with a stable outlook. The notes are subject to certain covenant restrictions and regulations which are customary for credit rated obligations. At the time of funding, the proceeds were offered at a discount of the original note amount which also excluded an underwriting fee discount. The net proceeds received from the issuance were used to repay the outstanding balance of $475.0 million on the revolving Credit Facility and for other general corporate purposes. As of June 30, 2017 and December 31, 2016, there was an outstanding debt balance of $500.0 million exclusive of the associated discount balance. In conjunction with the acquisition of Social Security Advocates for the Disabled (SSAD) effective February 1, 2016, the company added a $0.5 million promissory note incurred as a payment to the sellers and payable after the one-year anniversary of the acquisition. The note had a nominal rate of interest 0.810%. On March 10, 2017, the promissory note was settled, plus any outstanding accrued interest, using cash. The Master Agreement and the Amended and Restated Credit Agreement require the Company to maintain certain financial ratios and comply with certain other covenants. The Company was in compliance with all such covenants as of June 30, 2017 and December 31, 2016. The 30-day Adjusted LIBOR Rate as of June 30, 2017 was 1.250% .

Supplemental Disclosures of Cas

Supplemental Disclosures of Cash Flow Information and Non-Cash Financing and Investing Activities	6 Months Ended
	Jun. 30, 2017
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 For the six months (in thousands) 2017 2016 Cash paid during the period for: Interest $ 18,556 $ 18,770 Income taxes $ 77,343 $ 71,466 Brown & Brown’s significant non-cash investing and financing activities are summarized as follows: For the six months (in thousands) 2017 2016 Other payable issued for purchased customer accounts $ 11,069 $ 10,500 Estimated acquisition earn-out payables and related charges $ 282 $ 2,393 Notes payable issued or assumed for purchased customer accounts $ — $ 492 The following is a reconciliation of cash and cash equivalents inclusive of restricted cash as of June 30, 2017 and 2016 . Balance as of June 30, (in thousands) 2017 2016 Table to reconcile cash and cash equivalents inclusive of restricted cash Cash and cash equivalents $ 600,296 $ 453,939 Restricted cash 276,634 277,646 Total cash and cash equivalents inclusive of restricted cash at the end of the period $ 876,930 $ 731,585 The following is a reconciliation of cash and cash equivalents inclusive of restricted cash as of December 31, 2016 and 2015 . Balance as of December 31, (in thousands) 2016 2015 Table to reconcile cash and cash equivalents inclusive of restricted cash Cash and cash equivalents $ 515,646 $ 443,420 Restricted cash 265,637 229,753 Total cash and cash equivalents inclusive of restricted cash at the end of the period $ 781,283 $ 673,173

Legal and Regulatory Proceeding

Legal and Regulatory Proceedings	6 Months Ended
	Jun. 30, 2017
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. During the first quarter of 2017, the Company was successful in settling a lawsuit it had brought against certain former employees of Brown & Brown, their employer, AssuredPartners, Inc. and certain key executives of AssuredPartners. The settlement included a payment of $20,000,000 by AssuredPartners to Brown & Brown in exchange for releasing certain individuals from restrictive covenants in the employment contracts they had signed with the Company and provides protection for current Brown & Brown teammates from continued solicitation for employment by AssuredPartners. The proceeds of the settlement were received in March 2017 and were recorded in the Other income line in the Statement of Income. 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	6 Months Ended
	Jun. 30, 2017
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 $4.2 million and $3.7 million of total revenues for the three months ended June 30, 2017 and 2016 , respectively. These operations earned $7.2 million and $6.5 million of total revenues for the six months ended June 30, 2017 and 2016 , respectively. Long-lived assets held outside of the United States as of June 30, 2017 and 2016 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, 2016 . The Company evaluates the performance of its segments based upon revenues and income before income taxes. Inter-segment revenues are eliminated. Summarized financial information concerning the Company’s reportable segments is shown in the following table. The “Other” column includes any income and expenses not allocated to reportable segments, corporate-related items, including the inter-company interest expense charge to the reporting segment, and the elimination of inter-segment activities. For the three months ended June 30, 2017 (in thousands) Retail National Programs Wholesale Brokerage Services Other Total Total revenues $ 238,969 $ 113,675 $ 71,991 $ 41,580 $ 90 $ 466,305 Investment income $ 1 $ 81 $ — $ 72 $ 197 $ 351 Amortization $ 10,517 $ 6,847 $ 2,845 $ 1,137 $ 1 $ 21,347 Depreciation $ 1,324 $ 1,604 $ 477 $ 390 $ 1,860 $ 5,655 Interest expense $ 8,126 $ 8,918 $ 1,613 $ 946 $ (9,729 ) $ 9,874 Income before income taxes $ 47,978 $ 23,397 $ 20,085 $ 8,449 $ 8,093 $ 108,002 Total assets $ 4,090,094 $ 2,723,177 $ 1,204,184 $ 396,165 $ (3,134,611 ) $ 5,279,009 Capital expenditures $ 1,404 $ 1,448 $ 1,014 $ 342 $ 1,608 $ 5,816 For the three months ended June 30, 2016 (in thousands) Retail National Programs Wholesale Brokerage Services Other Total Total revenues $ 234,560 $ 108,820 $ 61,287 $ 41,752 $ 99 $ 446,518 Investment income $ 7 $ 239 $ 1 $ 83 $ 172 $ 502 Amortization $ 10,893 $ 6,982 $ 2,591 $ 1,140 $ 4 $ 21,610 Depreciation $ 1,616 $ 2,007 $ 488 $ 472 $ 771 $ 5,354 Interest expense $ 9,986 $ 11,461 $ 685 $ 1,327 $ (13,622 ) $ 9,837 Income before income taxes $ 49,150 $ 22,245 $ 16,287 $ 6,906 $ 14,489 $ 109,077 Total assets $ 3,593,733 $ 2,556,293 $ 1,018,689 $ 327,957 $ (2,289,795 ) $ 5,206,877 Capital expenditures $ 2,172 $ 1,314 $ 322 $ 276 $ 608 $ 4,692 For the six months ended June 30, 2017 (in thousands) Retail National Programs Wholesale Brokerage Services Other Total Total revenues $ 478,256 $ 214,858 $ 137,238 $ 80,906 $ 20,127 $ 931,385 Investment income $ 3 $ 155 $ — $ 152 $ 284 $ 594 Amortization $ 21,164 $ 13,751 $ 5,776 $ 2,275 $ 1 $ 42,967 Depreciation $ 2,713 $ 3,563 $ 967 $ 789 $ 3,721 $ 11,753 Interest expense $ 16,702 $ 18,953 $ 3,288 $ 1,907 $ (21,294 ) $ 19,556 Income before income taxes $ 96,833 $ 35,924 $ 35,350 $ 14,570 $ 36,292 $ 218,969 Total assets $ 4,090,094 $ 2,723,177 $ 1,204,184 $ 396,165 $ (3,134,611 ) $ 5,279,009 Capital expenditures $ 2,540 $ 2,528 $ 1,392 $ 492 $ 1,896 $ 8,848 For the six months ended June 30, 2016 (in thousands) Retail National Programs Wholesale Brokerage Services Other Total Total revenues $ 466,748 $ 209,890 $ 114,701 $ 78,320 $ 1,032 $ 870,691 Investment income $ 28 $ 487 $ 4 $ 147 $ 254 $ 920 Amortization $ 21,882 $ 14,090 $ 5,033 $ 2,205 $ 10 $ 43,220 Depreciation $ 3,253 $ 3,936 $ 984 $ 959 $ 1,540 $ 10,672 Interest expense $ 20,389 $ 24,051 $ 932 $ 2,563 $ (28,201 ) $ 19,734 Income before income taxes $ 99,602 $ 36,048 $ 30,849 $ 11,958 $ 33,169 $ 211,626 Total assets $ 3,593,733 $ 2,556,293 $ 1,018,689 $ 327,957 $ (2,289,795 ) $ 5,206,877 Capital expenditures $ 3,221 $ 3,246 $ 914 $ 481 $ 1,082 $ 8,944

Investments

Investments	6 Months Ended
	Jun. 30, 2017
Investments, Debt and Equity Securities [Abstract]
Investments	Investments At June 30, 2017 , 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 Municipalities $ 30,063 $ 3 $ (98 ) $ 29,968 Corporate debt 1,832 16 — 1,848 Total $ 31,895 $ 19 $ (98 ) $ 31,816 At June 30, 2017 , the Company held $30.0 million in fixed income securities composed of U.S. Treasury securities, securities issued by U.S. Government agencies and municipalities, and $1.8 million issued by corporations with investment grade ratings. Of that total, $21.0 million is classified as short-term investments on the Consolidated Balance Sheet as maturities are less than one-year. Additionally, the Company holds $9.2 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 June 30, 2017 : 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 Municipalities $ 26,886 $ (98 ) $ — $ — $ 26,886 $ (98 ) Corporate debt 475 — — — 475 — Total $ 27,361 $ (98 ) $ — $ — $ 27,361 $ (98 ) The unrealized losses were caused by interest rate increases. At June 30, 2017 , the Company had 27 securities in an unrealized loss position. The corporate securities are highly rated securities with no indicators of potential impairment. Based on the ability and intent of the Company to hold these investments until recovery of fair value, which may be maturity, the bonds were not considered to be other-than-temporarily impaired at June 30, 2017 . At December 31, 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 Municipalities $ 26,280 $ 11 $ (59 ) $ 26,232 Corporate debt 2,358 13 (1 ) 2,370 Total $ 28,638 $ 24 $ (60 ) $ 28,602 At December 31, 2016 , the Company held $26.2 million in fixed income securities composed of U.S. Treasury securities, securities issued by U.S. Government agencies and municipalities, and $2.4 million issued by corporations with investment grade ratings. Of that total, $5.6 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 December 31, 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 Municipalities $ 14,663 $ (59 ) $ — $ — $ 14,663 $ (59 ) Corporate debt 1,001 (1 ) — — 1,001 (1 ) Total $ 15,664 $ (60 ) $ — $ — $ 15,664 $ (60 ) The unrealized losses from corporate issuers were caused by interest rate increases. At December 31, 2016 , the Company had 20 securities in an unrealized loss position. The corporate securities are highly rated securities with no indicators of potential impairment. Based on the ability and intent of the Company to hold these investments until recovery of fair value, which may be maturity, the bonds were not considered to be other-than-temporarily impaired at December 31, 2016 . The amortized cost and estimated fair value of the fixed maturity securities at June 30, 2017 by contractual maturity are set forth below: (in thousands) Amortized Cost Fair Value Years to maturity: Due in one year or less $ 20,993 $ 20,940 Due after one year through five years 10,572 10,533 Due after five years 330 343 Total $ 31,895 $ 31,816 The amortized cost and estimated fair value of the fixed maturity securities at December 31, 2016 by contractual maturity are set forth below: (in thousands) Amortized Cost Fair Value Years to maturity: Due in one year or less $ 5,551 $ 5,554 Due after one year through five years 22,757 22,708 Due after five years 330 340 Total $ 28,638 $ 28,602 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 $0.5 million . This along with maturing time deposits yielded total cash proceeds from the sale of investments of $2.9 million in the period of January 1, 2017 to June 30, 2017 . These proceeds were used to purchase additional fixed maturity securities. The gains and losses realized on those sales for the period from January 1, 2017 to June 30, 2017 were insignificant . Realized gains and losses are reported on the Condensed Consolidated Statements of Income, with the cost of securities sold determined on a specific identification basis. At June 30, 2017 , 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	6 Months Ended
	Jun. 30, 2017
Reinsurance Disclosures [Abstract]
Losses and Loss Adjustment Reserve	Although the reinsurers are liable to the Company for amounts reinsured, our subsidiary, Wright National Flood Insurance Company (“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, 2017 to (in thousands) Written Earned Direct premiums $ 277,930 $ 288,856 Ceded premiums (277,925 ) (288,851 ) Net premiums $ 5 $ 5 All premiums written by Wright Flood under the National Flood Insurance Program are 100% ceded to the Federal Emergency Management Agency, or FEMA, for which Wright Flood received a 30.9% expense allowance from January 1, 2017 through June 30, 2017 . For the period from January 1, 2017 through June 30, 2017 , the Company ceded $277.2 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 $0.7 million for the period from January 1, 2017 through June 30, 2017 . No loss data exists on this agreement. Wright Flood also ceded 100% of the Homeowners, Private Passenger Auto Liability, and Other Liability Occurrence to Stillwater Insurance Company, formerly known as Fidelity National Insurance Company. This business is in runoff. Therefore, only loss data still exists on this business. As of June 30, 2017 , 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 June 30, 2017 the Condensed Consolidated Balance Sheet contained reinsurance recoverable of $22.5 million and prepaid reinsurance premiums of $297.7 million . There was no net activity in the reserve for losses and loss adjustment expense during the period January 1, 2017 through June 30, 2017 , as Wright Flood's direct premiums written were 100% ceded to two reinsurers. The balance of the reserve for losses and loss adjustment expense, excluding related reinsurance recoverable, as of June 30, 2017 was $22.5 million .

Statutory Financial Information

Statutory Financial Information	6 Months Ended
	Jun. 30, 2017
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 $25.3 million at June 30, 2017 and $23.5 million as of December 31, 2016 . For the period from January 1, 2017 through June 30, 2017 , Wright Flood generated statutory net income of $1.6 million . For the period from January 1, 2016 through December 31, 2016 , Wright Flood generated statutory net income of $8.2 million .

Subsidiary Dividend Restriction

Subsidiary Dividend Restrictions	6 Months Ended
	Jun. 30, 2017
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 2016 and the maximum dividend payout that may be made in 2017 without prior approval is $8.2 million .

Shareholders' Equity

Shareholders' Equity	6 Months Ended
	Jun. 30, 2017
Equity [Abstract]
Shareholders' Equity	Shareholders’ Equity Between May 18, 2017 and June 30, 2017, the Company made share repurchases in the open market in total of 216,615 shares at a total cost of $11.2 million. After completing these share repurchases, the Company’s outstanding Board approved share repurchase authorization is $356.1 million. Under the authorization from the Company’s Board of Directors, shares may be purchased from time to time, at the Company’s discretion and subject to the availability of stock, market conditions, the trading price of the stock, alternative uses for capital, the Company’s financial performance and other potential factors. These purchases may be carried out through open market purchases, block trades, accelerated share repurchase plans of up to $100.0 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)	6 Months Ended
	Jun. 30, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Nature of Operations	four
Basis of Accounting	December 31, 2016 .
Recently Issued Accounting Pronouncements	Recently Issued Accounting Pronouncements

Net Income Per Share (Tables)

Net Income Per Share (Tables)	6 Months Ended
	Jun. 30, 2017
Earnings Per Share [Abstract]
Reconciliation between Basic and Diluted Weighted Average Shares Outstanding	For the three months For the six months (in thousands, except per share data) 2017 2016 2017 2016 Net income $ 66,102 $ 66,250 $ 136,212 $ 128,320 Net income attributable to unvested awarded performance stock (1,642 ) (1,896 ) (3,329 ) (3,337 ) Net income attributable to common shares $ 64,460 $ 64,354 $ 132,883 $ 124,983 Weighted average number of common shares outstanding – basic 140,173 139,998 140,143 139,395 Less unvested awarded performance stock included in weighted average number of common shares outstanding – basic (3,481 ) (4,006 ) (3,425 ) (3,625 ) Weighted average number of common shares outstanding for basic earnings per common share 136,692 135,992 136,718 135,770 Dilutive effect of stock options 2,409 1,589 2,346 1,490 Weighted average number of shares outstanding – diluted 139,101 137,581 139,064 137,260 Net income per share: Basic $ 0.47 $ 0.47 $ 0.97 $ 0.92 Diluted $ 0.46 $ 0.47 $ 0.96 $ 0.91

Business Combinations (Tables)

Business Combinations (Tables)	6 Months Ended
	Jun. 30, 2017
Business Combinations [Abstract]
Purchase price allocation for current year acquisitions and adjustments made for prior year acquisitions	(in thousands) Name Business Segment Effective Date of Acquisition Cash Paid Other Payable Recorded Earn-Out Payable Net Assets Acquired Maximum Potential Earn- Out Payable Other Various Various 11,526 11,069 282 22,877 3,305 Total $ 11,526 $ 11,069 $ 282 $ 22,877 $ 3,305
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 and adjustments made during the measurement period of the prior year acquisitions. (in thousands) Other Total Other current assets 93 93 Fixed assets 35 35 Goodwill 16,702 16,702 Purchased customer accounts 7,279 7,279 Non-compete agreements 552 552 Total assets acquired 24,661 24,661 Other current liabilities (1,095 ) (1,095 ) Deferred income tax, net (689 ) (689 ) Total liabilities assumed (1,784 ) (1,784 ) Net assets acquired $ 22,877 $ 22,877
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 six months (in thousands, except per share data) 2017 2016 2017 2016 Total revenues $ 467,369 $ 448,362 $ 934,477 $ 874,344 Income before income taxes $ 108,412 $ 109,736 $ 220,119 $ 212,932 Net income $ 66,353 $ 66,650 $ 136,916 $ 129,113 Net income per share: Basic $ 0.47 $ 0.48 $ 0.98 $ 0.93 Diluted $ 0.47 $ 0.47 $ 0.96 $ 0.92 Weighted average number of shares outstanding: Basic 136,692 135,992 136,718 135,770 Diluted 139,101 137,581 139,064 137,260
Additions, payments, and net changes, as well as interest expense accretion on estimated acquisition earn-out payables	The resulting additions, payments, and net changes, as well as the interest expense accretion on the estimated acquisition earn-out payables, for the three and six months ended June 30, 2017 and 2016 , were as follows: For the three months For the six months (in thousands) 2017 2016 2017 2016 Balance as of the beginning of the period $ 57,408 $ 69,095 $ 63,821 $ 78,387 Additions to estimated acquisition earn-out payables 493 1,787 282 2,393 Payments for estimated acquisition earn-out payables (5,547 ) (1,485 ) (15,777 ) (10,562 ) Subtotal 52,354 69,397 48,326 70,218 Net change in earnings from estimated acquisition earn-out payables: Change in fair value on estimated acquisition earn-out payables 4,851 3,385 8,186 1,822 Interest expense accretion 738 672 1,431 1,414 Net change in earnings from estimated acquisition earn-out payables 5,589 4,057 9,617 3,236 Balance as of June 30, $ 57,943 $ 73,454 $ 57,943 $ 73,454

Goodwill (Tables)

Goodwill (Tables)	6 Months Ended
	Jun. 30, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
Changes in Carrying Value of Goodwill by Operating Segment	six months ended June 30, 2017 are as follows: (in thousands) Retail National Programs Wholesale Brokerage Services Total Balance as of January 1, 2017 $ 1,354,667 $ 901,294 $ 284,869 $ 134,572 $ 2,675,402 Goodwill of acquired businesses 7,929 7,314 770 689 16,702 Balance as of June 30, 2017 $ 1,362,596 $ 908,608 $ 285,639 $ 135,261 $ 2,692,104

Amortizable Intangible Assets (

Amortizable Intangible Assets (Tables)	6 Months Ended
	Jun. 30, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
Amortizable Intangible Assets	Amortizable intangible assets at June 30, 2017 and December 31, 2016 consisted of the following: June 30, 2017 December 31, 2016 (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 $ 1,454,377 $ (784,097 ) $ 670,280 15.0 $ 1,447,680 $ (741,770 ) $ 705,910 15.0 Non-compete agreements 30,220 (28,626 ) 1,594 6.8 29,668 (28,124 ) 1,544 6.8 Total $ 1,484,597 $ (812,723 ) $ 671,874 $ 1,477,348 $ (769,894 ) $ 707,454 (1) Weighted average life calculated as of the date of acquisition.

Long-Term Debt (Tables)

Long-Term Debt (Tables)	6 Months Ended
	Jun. 30, 2017
Debt Disclosure [Abstract]
Long-Term Debt Instrument	Long-term debt at June 30, 2017 and December 31, 2016 consisted of the following: (in thousands) June 30, December 31, 2016 Current portion of long-term debt: Current portion of 5-year term loan facility expires June 28, 2022 $ 20,000 $ 55,000 Short-term promissory note — 500 Total current portion of long-term debt 20,000 55,500 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, net of the unamortized discount, balloon due 2024 498,865 498,785 Total notes 598,865 598,785 Credit agreements: 5-year term-loan facility, periodic interest and principal payments, LIBOR plus up to 1.750%, expires June 28, 2022 375,000 426,250 5-year revolving-loan facility, periodic interest payments, currently LIBOR plus up to 1.500%, plus commitment fees up to 0.250%, expires June 28, 2022 — — Total credit agreements 375,000 426,250 Debt issuance costs (contra) (8,474 ) (6,663 ) Total long-term debt less unamortized discount and debt issuance costs 965,391 1,018,372 Current portion of long-term debt 20,000 55,500 Total debt $ 985,391 $ 1,073,872

Supplemental Disclosures of C27

Supplemental Disclosures of Cash Flow Information and Non-Cash Financing and Investing Activities (Tables)	6 Months Ended
	Jun. 30, 2017
Supplemental Cash Flow Elements [Abstract]
Summary of Supplemental Disclosures of Cash Flow Information and Non-Cash Financing and Investing Activities	For the six months (in thousands) 2017 2016 Cash paid during the period for: Interest $ 18,556 $ 18,770 Income taxes $ 77,343 $ 71,466 Brown & Brown’s significant non-cash investing and financing activities are summarized as follows: For the six months (in thousands) 2017 2016 Other payable issued for purchased customer accounts $ 11,069 $ 10,500 Estimated acquisition earn-out payables and related charges $ 282 $ 2,393 Notes payable issued or assumed for purchased customer accounts $ — $ 492

Segment Information (Tables)

Segment Information (Tables)	6 Months Ended
	Jun. 30, 2017
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 $4.2 million and $3.7 million of total revenues for the three months ended June 30, 2017 and 2016 , respectively. These operations earned $7.2 million and $6.5 million of total revenues for the six months ended June 30, 2017 and 2016 , respectively. Long-lived assets held outside of the United States as of June 30, 2017 and 2016 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, 2016 . The Company evaluates the performance of its segments based upon revenues and income before income taxes. Inter-segment revenues are eliminated. Summarized financial information concerning the Company’s reportable segments is shown in the following table. The “Other” column includes any income and expenses not allocated to reportable segments, corporate-related items, including the inter-company interest expense charge to the reporting segment, and the elimination of inter-segment activities. For the three months ended June 30, 2017 (in thousands) Retail National Programs Wholesale Brokerage Services Other Total Total revenues $ 238,969 $ 113,675 $ 71,991 $ 41,580 $ 90 $ 466,305 Investment income $ 1 $ 81 $ — $ 72 $ 197 $ 351 Amortization $ 10,517 $ 6,847 $ 2,845 $ 1,137 $ 1 $ 21,347 Depreciation $ 1,324 $ 1,604 $ 477 $ 390 $ 1,860 $ 5,655 Interest expense $ 8,126 $ 8,918 $ 1,613 $ 946 $ (9,729 ) $ 9,874 Income before income taxes $ 47,978 $ 23,397 $ 20,085 $ 8,449 $ 8,093 $ 108,002 Total assets $ 4,090,094 $ 2,723,177 $ 1,204,184 $ 396,165 $ (3,134,611 ) $ 5,279,009 Capital expenditures $ 1,404 $ 1,448 $ 1,014 $ 342 $ 1,608 $ 5,816 For the three months ended June 30, 2016 (in thousands) Retail National Programs Wholesale Brokerage Services Other Total Total revenues $ 234,560 $ 108,820 $ 61,287 $ 41,752 $ 99 $ 446,518 Investment income $ 7 $ 239 $ 1 $ 83 $ 172 $ 502 Amortization $ 10,893 $ 6,982 $ 2,591 $ 1,140 $ 4 $ 21,610 Depreciation $ 1,616 $ 2,007 $ 488 $ 472 $ 771 $ 5,354 Interest expense $ 9,986 $ 11,461 $ 685 $ 1,327 $ (13,622 ) $ 9,837 Income before income taxes $ 49,150 $ 22,245 $ 16,287 $ 6,906 $ 14,489 $ 109,077 Total assets $ 3,593,733 $ 2,556,293 $ 1,018,689 $ 327,957 $ (2,289,795 ) $ 5,206,877 Capital expenditures $ 2,172 $ 1,314 $ 322 $ 276 $ 608 $ 4,692 For the six months ended June 30, 2017 (in thousands) Retail National Programs Wholesale Brokerage Services Other Total Total revenues $ 478,256 $ 214,858 $ 137,238 $ 80,906 $ 20,127 $ 931,385 Investment income $ 3 $ 155 $ — $ 152 $ 284 $ 594 Amortization $ 21,164 $ 13,751 $ 5,776 $ 2,275 $ 1 $ 42,967 Depreciation $ 2,713 $ 3,563 $ 967 $ 789 $ 3,721 $ 11,753 Interest expense $ 16,702 $ 18,953 $ 3,288 $ 1,907 $ (21,294 ) $ 19,556 Income before income taxes $ 96,833 $ 35,924 $ 35,350 $ 14,570 $ 36,292 $ 218,969 Total assets $ 4,090,094 $ 2,723,177 $ 1,204,184 $ 396,165 $ (3,134,611 ) $ 5,279,009 Capital expenditures $ 2,540 $ 2,528 $ 1,392 $ 492 $ 1,896 $ 8,848 For the six months ended June 30, 2016 (in thousands) Retail National Programs Wholesale Brokerage Services Other Total Total revenues $ 466,748 $ 209,890 $ 114,701 $ 78,320 $ 1,032 $ 870,691 Investment income $ 28 $ 487 $ 4 $ 147 $ 254 $ 920 Amortization $ 21,882 $ 14,090 $ 5,033 $ 2,205 $ 10 $ 43,220 Depreciation $ 3,253 $ 3,936 $ 984 $ 959 $ 1,540 $ 10,672 Interest expense $ 20,389 $ 24,051 $ 932 $ 2,563 $ (28,201 ) $ 19,734 Income before income taxes $ 99,602 $ 36,048 $ 30,849 $ 11,958 $ 33,169 $ 211,626 Total assets $ 3,593,733 $ 2,556,293 $ 1,018,689 $ 327,957 $ (2,289,795 ) $ 5,206,877 Capital expenditures $ 3,221 $ 3,246 $ 914 $ 481 $ 1,082 $ 8,944

Investments (Tables)

Investments (Tables)	6 Months Ended
	Jun. 30, 2017
Schedule of Held-to-maturity Securities [Line Items]
Schedule of Investments in Fixed Maturity Securities	At December 31, 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 Municipalities $ 26,280 $ 11 $ (59 ) $ 26,232 Corporate debt 2,358 13 (1 ) 2,370 Total $ 28,638 $ 24 $ (60 ) $ 28,602 At June 30, 2017 , 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 Municipalities $ 30,063 $ 3 $ (98 ) $ 29,968 Corporate debt 1,832 16 — 1,848 Total $ 31,895 $ 19 $ (98 ) $ 31,816
Summary of Unrealized Loss Position	December 31, 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 Municipalities $ 14,663 $ (59 ) $ — $ — $ 14,663 $ (59 ) Corporate debt 1,001 (1 ) — — 1,001 (1 ) Total $ 15,664 $ (60 ) $ — $ — $ 15,664 $ (60 ) he following table shows the investments’ gross unrealized loss and fair value, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position as of June 30, 2017 : 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 Municipalities $ 26,886 $ (98 ) $ — $ — $ 26,886 $ (98 ) Corporate debt 475 — — — 475 — Total $ 27,361 $ (98 ) $ — $ — $ 27,361 $ (98 )
Amortized Cost and Fair Value of Fixed Maturity Securities by Contractual Maturity	The amortized cost and estimated fair value of the fixed maturity securities at June 30, 2017 by contractual maturity are set forth below: (in thousands) Amortized Cost Fair Value Years to maturity: Due in one year or less $ 20,993 $ 20,940 Due after one year through five years 10,572 10,533 Due after five years 330 343 Total $ 31,895 $ 31,816 The amortized cost and estimated fair value of the fixed maturity securities at December 31, 2016 by contractual maturity are set forth below: (in thousands) Amortized Cost Fair Value Years to maturity: Due in one year or less $ 5,551 $ 5,554 Due after one year through five years 22,757 22,708 Due after five years 330 340 Total $ 28,638 $ 28,602

Losses and Loss Adjustment Re30

Losses and Loss Adjustment Reserve (Tables)	6 Months Ended
	Jun. 30, 2017
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, 2017 to (in thousands) Written Earned Direct premiums $ 277,930 $ 288,856 Ceded premiums (277,925 ) (288,851 ) Net premiums $ 5 $ 5

Nature of Operations - Addition

Nature of Operations - Additional Information (Detail)	6 Months Ended
	Jun. 30, 2017Segment
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of reportable segments	4

Basis of Financial Reporting Te

Basis of Financial Reporting Text Block (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Text Block [Abstract]
Share-based Compensation	$ 15,326	$ 6,674

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		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Earnings Per Share [Abstract]
Net income	$ 66,102	$ 66,250	$ 136,212	$ 128,320
Net income attributable to unvested awarded performance stock	(1,642)	(1,896)	(3,329)	(3,337)
Net income attributable to common shares	$ 64,460	$ 64,354	$ 132,883	$ 124,983
Weighted average number of common shares outstanding - basic (in shares)	140,173	139,998	140,143	139,395
Less unvested awarded performance stock included in weighted average number of common shares outstanding - basic (in shares)	(3,481)	(4,006)	(3,425)	(3,625)
Weighted average number of common shares outstanding for basic earnings per common share (in shares)	136,692	135,992	136,718	135,770
Dilutive effect of stock options (in shares)	2,409	1,589	2,346	1,490
Weighted average number of shares outstanding - diluted (in shares)	139,101	137,581	139,064	137,260
Basic (in dollars per share)	$ 0.47	$ 0.47	$ 0.97	$ 0.92
Diluted (in dollars per share)	$ 0.46	$ 0.47	$ 0.96	$ 0.91

Business Combinations - Additio

Business Combinations - Additional Information (Detail)	3 Months Ended	6 Months Ended
	Jun. 30, 2017USD ($)	Jun. 30, 2017USD ($)acquisition	Jun. 30, 2016USD ($)acquisition	Apr. 01, 2016USD ($)	Jan. 01, 2016USD ($)	Apr. 01, 2015USD ($)	Jan. 01, 2015USD ($)
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets	$ 24,661,000	$ 24,661,000
Number of acquisitions | acquisition		3	5
Aggregate purchase price of acquisitions		$ 1,387,569
Payments to Acquire Businesses, Gross		11,526,000	$ 109,400,000
Goodwill assigned	16,702,000	16,702,000
Goodwill currently deductible for income tax purposes	16,420,000	16,420,000
Goodwill related to the recorded earn-out payables	283,000	283,000
Total revenues related to acquisitions	454,000	454,000
Income before income taxes related to acquisitions	115,000	115,000
Estimated acquisition earn-out payables	57,943,000	57,943,000	$ 73,454,000	$ 57,408,000	$ 63,821,000	$ 69,095,000	$ 78,387,000
Maximum Future Contingency payments Acquisitions	100,200,000	100,200,000
Accounts payable
Business Acquisition [Line Items]
Estimated acquisition earn-out payables	44,000,000	$ 44,000,000
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	7,539,000	$ 7,539,000
National Programs
Business Acquisition [Line Items]
Goodwill assigned	7,314,000	7,314,000
Wholesale Brokerage
Business Acquisition [Line Items]
Goodwill assigned	878,000	878,000
Services [Member]
Business Acquisition [Line Items]
Goodwill assigned	689,000	689,000
Other non-current liability
Business Acquisition [Line Items]
Estimated acquisition earn-out payables	13,900,000	$ 13,900,000
Business Combinations - Asset Deals [Member]
Business Acquisition [Line Items]
Number of acquisitions | acquisition		3
Other Acquisitions [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets	24,661,000	$ 24,661,000
Goodwill assigned	$ 16,702,000	$ 16,702,000

Business Combinations - Acquisi

Business Combinations - Acquisitions Accounted for Business Combinations (Detail) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Business Combination, Separately Recognized Transactions [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities	$ 1,784
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets	24,661
Cash Paid	11,526	$ 109,400
Other Payable	11,069
Recorded Earn-Out Payable	282
Net Assets Acquired	22,877
Maximum Potential Earn- Out Payable	3,305
Other current assets	93
Fixed assets	35
Goodwill	16,702
Purchased customer accounts	7,279
Non-compete agreements	552
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Other	1,095
Deferred Tax Liabilities, Net	689
Services [Member]
Business Combination, Separately Recognized Transactions [Line Items]
Goodwill	689
Services
Business Combination, Separately Recognized Transactions [Line Items]
Goodwill	7,539
National Programs
Business Combination, Separately Recognized Transactions [Line Items]
Goodwill	7,314
Wholesale Brokerage
Business Combination, Separately Recognized Transactions [Line Items]
Goodwill	878
Other Acquisitions [Member]
Business Combination, Separately Recognized Transactions [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities	1,784
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets	24,661
Net Assets Acquired	22,877
Other current assets	93
Fixed assets	35
Goodwill	16,702
Purchased customer accounts	7,279
Non-compete agreements	552
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Other	1,095
Deferred Tax Liabilities, Net	689
Other Acquisitions [Member] | Various
Business Combination, Separately Recognized Transactions [Line Items]
Cash Paid	11,526
Other Payable	11,069
Recorded Earn-Out Payable	282
Net Assets Acquired	22,877
Maximum Potential Earn- Out Payable	$ 3,305

Business Combinations - Estimat

Business Combinations - Estimated Fair Values of Aggregate Assets and Liabilities Acquired (Detail) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Fair Value Of Assets And Liabilities Statement [Line Items]
Payments to Acquire Businesses, Gross	$ 11,526	$ 109,400
Recorded Earn-Out Payable	282
Other current assets	93
Fixed assets	35
Goodwill	16,702
Purchased customer accounts	7,279
Non-compete agreements	552
Total assets acquired	24,661
Other current liabilities	(1,095)
Deferred Tax Liabilities, Net	(689)
Total liabilities assumed	(1,784)
Net assets acquired	22,877
Maximum Potential Earn- Out Payable	3,305
Other Acquisitions [Member]
Fair Value Of Assets And Liabilities Statement [Line Items]
Other current assets	93
Fixed assets	35
Goodwill	16,702
Purchased customer accounts	7,279
Non-compete agreements	552
Total assets acquired	24,661
Other current liabilities	(1,095)
Deferred Tax Liabilities, Net	(689)
Total liabilities assumed	(1,784)
Net assets acquired	22,877
Wholesale Brokerage
Fair Value Of Assets And Liabilities Statement [Line Items]
Goodwill	$ 878

Business Combinations - Results

Business Combinations - Results of Operations (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual	$ 454		$ 454
Business Combination Pro Forma Information Income Loss Before Income Taxes Of Acquiree Since Acquisition Date Actual	115		115
Total revenues	467,369	$ 448,362	934,477	$ 874,344
Income before income taxes	108,412	109,736	220,119	212,932
Net income	$ 66,353	$ 66,650	$ 136,916	$ 129,113
Net income per share:
Basic (in dollars per share)	$ 0.47	$ 0.48	$ 0.98	$ 0.93
Diluted (in dollars per share)	$ 0.47	$ 0.47	$ 0.96	$ 0.92
Weighted Average Basic Shares Outstanding, Pro Forma	136,692	135,992	136,718	135,770
Weighted average number of shares outstanding:
Pro Forma Weighted Average Shares Outstanding, Diluted	139,101	137,581	139,064	137,260

Business Combinations - Addit38

Business Combinations - Additions, Payments, and Net Changes, as well as Interest Expense Accretion on Estimated Acquisition Earn-Out Payables (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Business Combinations [Abstract]
Additions to estimated acquisition earn-out payables	$ 493	$ 1,787	$ 282	$ 2,393
Payments for estimated acquisition earn-out payables	(5,547)	(1,485)	(15,777)	(10,562)
Subtotal	52,354	69,397	48,326	70,218
Net change in earnings from estimated acquisition earn-out payables:
Change in fair value on estimated acquisition earn-out payables	4,851	3,385	8,186	1,822
Interest expense accretion	738	672	1,431	1,414
Net change in earnings from estimated acquisition earn-out payables	5,589	4,057	9,617	3,236
Ending balance	$ 57,943	$ 73,454	$ 57,943	$ 73,454

Goodwill - Changes in Carrying

Goodwill - Changes in Carrying Value of Goodwill by Operating Segment (Detail) $ in Thousands	6 Months Ended
	Jun. 30, 2017USD ($)
Goodwill [Roll Forward]
Beginning balance	$ 2,675,402
Goodwill of acquired businesses	16,702
Ending balance	2,692,104
Services
Goodwill [Roll Forward]
Beginning balance	1,354,667
Goodwill of acquired businesses	7,929
Ending balance	1,362,596
National Programs
Goodwill [Roll Forward]
Beginning balance	901,294
Goodwill of acquired businesses	7,314
Ending balance	908,608
Wholesale Brokerage
Goodwill [Roll Forward]
Beginning balance	284,869
Goodwill of acquired businesses	770
Ending balance	285,639
Services
Goodwill [Roll Forward]
Beginning balance	134,572
Goodwill of acquired businesses	689
Ending balance	$ 135,261

Amortizable Intangible Assets -

Amortizable Intangible Assets - Amortizable Intangible Assets (Detail) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	$ 1,484,597		$ 1,477,348
Accumulated Amortization	(812,723)		(769,894)
Net Carrying Value	671,874		707,454
Purchased customer accounts
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	1,454,377		1,447,680
Accumulated Amortization	(784,097)		(741,770)
Net Carrying Value	$ 670,280		705,910
Weighted Average Life (Years)	15 years	15 years
Non-compete agreements
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	$ 30,220		29,668
Accumulated Amortization	(28,626)		(28,124)
Net Carrying Value	$ 1,594		$ 1,544
Weighted Average Life (Years)	6 years 9 months 18 days	6 years 9 months 18 days

Amortizable Intangible Assets41

Amortizable Intangible Assets - Additional Information (Detail) $ in Millions	Jun. 30, 2017USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization expense estimated, year one (2015)	$ 85.2
Amortization expense estimated, year two (2016)	80.2
Amortization expense estimated, year three (2017)	75.7
Amortization expense estimated, year four (2018)	68.3
Amortization expense estimated, year five (2019)	$ 65.1

Long-Term Debt - Long-Term Debt

Long-Term Debt - Long-Term Debt Instrument (Detail) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Dec. 31, 2016	Jan. 15, 2015
Debt Instrument [Line Items]
Document Period End Date	Jun. 30, 2017
Total current portion of long-term debt	$ 20,000	$ 55,500
Total notes	598,865	598,785
Long-term credit agreements	375,000	426,250
Debt Issuance Costs, Gross	(8,474)	(6,663)
Total long-term debt	965,391	1,018,372
Current portion of long-term debt	20,000	55,500
Total debt	985,391	1,073,872
Notes Payable, Current	0	500
5.660% senior notes, Series C, semi-annual interest payments, balloon due 2016
Debt Instrument [Line Items]
Current portion of senior notes			$ 25,000
4.500% senior notes, Series E, quarterly interest payments, balloon due 2018
Debt Instrument [Line Items]
Total notes	100,000	100,000
4.200% senior notes, semi-annual interest payments, net of the unamortized discount, balloon due 2024
Debt Instrument [Line Items]
Total notes	498,865	498,785
5-year term-loan facility, periodic interest and principal payments, LIBOR plus up to 1.750%, expires June 28, 2022
Debt Instrument [Line Items]
Current portion of loan facility	20,000	55,000
Long-term credit agreements	375,000	426,250
5-year revolving-loan facility, periodic interest payments, currently LIBOR plus up to 1.500%, plus commitment fees up to 0.250%, expires June 28, 2022
Debt Instrument [Line Items]
Long-term credit agreements	$ 0	$ 0

Long-Term Debt - Long-Term De43

Long-Term Debt - Long-Term Debt Instrument (Additional Information) (Detail)	6 Months Ended	12 Months Ended
	Jun. 30, 2017	Dec. 31, 2016
4.500% senior notes, Series E, quarterly interest payments, balloon due 2018
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage	4.50%	4.50%
Debt instrument maturity year	2,018	2,018
4.200% senior notes, semi-annual interest payments, net of the unamortized discount, balloon due 2024
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage	4.20%	4.20%
Debt instrument maturity year	2,024	2,024
5-year term-loan facility, periodic interest and principal payments, LIBOR plus up to 1.750%, expires June 28, 2022
Debt Instrument [Line Items]
Line of credit facility, expiration period	5 years	5 years
Line of credit facility, expiration date	Jun. 28, 2022	May 20, 2019
5-year term-loan facility, periodic interest and principal payments, LIBOR plus up to 1.750%, expires June 28, 2022 | 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 maturity year	2,022	2,019
5-year revolving-loan facility, periodic interest payments, currently LIBOR plus up to 1.500%, plus commitment fees up to 0.250%, expires June 28, 2022
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	Jun. 28, 2022	May 20, 2019
5-year revolving-loan facility, periodic interest payments, currently LIBOR plus up to 1.500%, plus commitment fees up to 0.250%, expires June 28, 2022 | LIBOR
Debt Instrument [Line Items]
Debt instrument, variable interest rate	1.50%	1.50%

Long-Term Debt - Narrative (Det

Long-Term Debt - Narrative (Detail)

Sep. 18, 2014USD ($)

May 20, 2014USD ($)extension

Jun. 30, 2017USD ($)

Jun. 30, 2017USD ($)

Jun. 30, 2016USD ($)

Sep. 30, 2017USD ($)

Jun. 28, 2017USD ($)

Dec. 31, 2016USD ($)

Jan. 15, 2015USD ($)

Apr. 17, 2014USD ($)

Sep. 15, 2011USD ($)

Feb. 01, 2008USD ($)

Dec. 22, 2006USD ($)

Debt Instrument [Line Items]

Document Period End Date

Jun. 30, 2017

Credit facility, outstanding amount

$ 375,000,000

$ 375,000,000

$ 426,250,000

Potential increased in line of credit facility

$ 500,000,000

Unsecured revolving credit facility

$ 400,000,000

800,000,000

Write off of Deferred Debt Issuance Cost

200,000

Debt Issuance Costs, Noncurrent, Net

1,600,000

Debt Instrument, Periodic Payment, Principal

5,000,000

Proceeds from Issuance of Debt

2,700,000

Unsecured term loans

$ 395,000,000

550,000,000

Outstanding debt balance

985,391,000

985,391,000

1,073,872,000

Notes Payable, Current

0

0

500,000

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

Debt Instrument [Line Items]

Current portion of senior notes

$ 25,000,000

Credit Agreement

Debt Instrument [Line Items]

Number of extension periods | extension

2

Extension period

1 year

Unsecured revolving credit facility

$ 1,350,000,000

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

500,000,000

Term Loan

Debt Instrument [Line Items]

Credit facility, outstanding amount

$ 550,000,000

Debt Instrument, Periodic Payment, Principal

67,500,000

Revolving Credit Facility [Member]

Debt Instrument [Line Items]

Credit facility, outstanding amount

$ 475,000,000

$ 375,000,000

Proceeds from lines of credit

$ 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

$ 100,000,000

$ 100,000,000

Master Agreement | Series C

Debt Instrument [Line Items]

Unsecured senior notes outstanding

$ 25,000,000

$ 25,000,000

Debt instrument interest rate stated percentage

5.66%

Master Agreement | Series D

Debt Instrument [Line Items]

Debt instrument interest rate stated percentage

5.37%

Master Agreement | Series E

Debt Instrument [Line Items]

Unsecured senior notes outstanding

$ 100,000,000

Debt instrument interest rate stated percentage

4.50%

LIBOR

Debt Instrument [Line Items]

30-day Adjusted LIBOR Rate

1.25%

1.25%

Minimum | Revolving Credit Facility [Member]

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 | Revolving Credit Facility [Member]

Debt Instrument [Line Items]

Debt instrument, variable interest rate

0.85%

Maximum | Revolving Credit Facility [Member]

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 | Revolving Credit Facility [Member]

Debt Instrument [Line Items]

Debt instrument, variable interest rate

1.50%

Scenario, Forecast [Member]

Debt Instrument [Line Items]

Unsecured senior notes outstanding

$ 5,000,000

Supplemental Disclosures of C45

Supplemental Disclosures of Cash Flow Information and Non-Cash Financing and Investing Activities - Significant Non-Cash Investing and Financing Activities (Detail) - USD ($)	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016	Dec. 31, 2015
Restricted Cash and Cash Equivalents Items [Line Items]
Document Period End Date	Jun. 30, 2017
Cash and cash equivalents	$ 600,296,000	$ 453,939,000	$ 515,646,000	$ 443,420,000
Restricted Cash and Cash Equivalents	276,634,000	277,646,000	265,637,000	229,753,000
Cash paid during the period for:
Interest	18,556,000	18,770,000
Income taxes	77,343,000	71,466,000
Significant non-cash investing and financing activities
Other payable issued for purchased customer accounts	11,069,000	10,500,000
Estimated acquisition earn-out payables and related charges	282,000	2,393,000
Business Acquisition Cost of Entity Note Payable	0	492,000
Cash and Cash Equivalents inclusive of Restricted Cash [Member]
Restricted Cash and Cash Equivalents Items [Line Items]
Cash and cash equivalents	$ 876,930,000	$ 731,585,000	$ 781,283,000	$ 673,173,000

Supplemental Disclosures of C46

Supplemental Disclosures of Cash Flow Information and Non-Cash Financing and Investing Activities Restricted Cash (Details) - USD ($)	6 Months Ended		12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016	Dec. 31, 2015
Cash and cash equivalents	$ 600,296,000	$ 453,939,000	$ 515,646,000	$ 443,420,000
Cash and Cash Equivalents, at Carrying Value	876,930,000	731,585,000	781,283,000	673,173,000
Restricted Cash and Cash Equivalents	276,634,000	277,646,000	265,637,000	229,753,000
Cash and Cash Equivalents inclusive of Restricted Cash [Member]
Cash and cash equivalents	$ 876,930,000	$ 731,585,000	$ 781,283,000	$ 673,173,000

Segment Information - Additiona

Segment Information - Additional Information (Detail) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017USD ($)	Jun. 30, 2016USD ($)	Jun. 30, 2017USD ($)Segment	Jun. 30, 2016USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments | Segment			4
Total revenues	$ 466,305	$ 446,518	$ 931,385	$ 870,691
London, Bermuda and Cayman Islands
Segment Reporting Information [Line Items]
Total revenues	$ 4,200	$ 3,700	$ 7,200	$ 6,500

Segment Information - Summarize

Segment Information - Summarized Financial Information Reportable Segments (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
Segment Reporting Information [Line Items]
Total revenues	$ 466,305	$ 446,518	$ 931,385	$ 870,691
Investment income	351	502	594	920
Amortization	21,347	21,610	42,967	43,220
Depreciation	5,655	5,354	11,753	10,672
Interest expense	9,874	9,837	19,556	19,734
Income before income taxes	108,002	109,077	218,969	211,626
Total assets	5,279,009	5,206,877	5,279,009	5,206,877	$ 5,262,734
Capital expenditures	5,816	4,692	8,848	8,944
Operating Segments | Services
Segment Reporting Information [Line Items]
Total revenues	238,969	234,560	478,256	466,748
Investment income	1	7	3	28
Amortization	10,517	10,893	21,164	21,882
Depreciation	1,324	1,616	2,713	3,253
Interest expense	8,126	9,986	16,702	20,389
Income before income taxes	47,978	49,150	96,833	99,602
Total assets	4,090,094	3,593,733	4,090,094	3,593,733
Capital expenditures	1,404	2,172	2,540	3,221
Operating Segments | National Programs
Segment Reporting Information [Line Items]
Total revenues	113,675	108,820	214,858	209,890
Investment income	81	239	155	487
Amortization	6,847	6,982	13,751	14,090
Depreciation	1,604	2,007	3,563	3,936
Interest expense	8,918	11,461	18,953	24,051
Income before income taxes	23,397	22,245	35,924	36,048
Total assets	2,723,177	2,556,293	2,723,177	2,556,293
Capital expenditures	1,448	1,314	2,528	3,246
Operating Segments | Wholesale Brokerage
Segment Reporting Information [Line Items]
Total revenues	71,991	61,287	137,238	114,701
Investment income	0	1	0	4
Amortization	2,845	2,591	5,776	5,033
Depreciation	477	488	967	984
Interest expense	1,613	685	3,288	932
Income before income taxes	20,085	16,287	35,350	30,849
Total assets	1,204,184	1,018,689	1,204,184	1,018,689
Capital expenditures	1,014	322	1,392	914
Operating Segments | Services
Segment Reporting Information [Line Items]
Total revenues	41,580	41,752	80,906	78,320
Investment income	72	83	152	147
Amortization	1,137	1,140	2,275	2,205
Depreciation	390	472	789	959
Interest expense	946	1,327	1,907	2,563
Income before income taxes	8,449	6,906	14,570	11,958
Total assets	396,165	327,957	396,165	327,957
Capital expenditures	342	276	492	481
Other
Segment Reporting Information [Line Items]
Total revenues	90	99	20,127	1,032
Investment income	197	172	284	254
Amortization	1	4	1	10
Depreciation	1,860	771	3,721	1,540
Interest expense	(9,729)	(13,622)	(21,294)	(28,201)
Income before income taxes	8,093	14,489	36,292	33,169
Total assets	(3,134,611)	(2,289,795)	(3,134,611)	(2,289,795)
Capital expenditures	$ 1,608	$ 608	$ 1,896	$ 1,082

Investments - Schedule of Inves

Investments - Schedule of Investments in Fixed Maturity Securities (Detail) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Debt Maturities, Single Maturity Date	$ 9,200	$ 9,500
Cost	31,895	28,638
Gross Unrealized Gains	19	24
Gross Unrealized Losses	(98)	(60)
Fair Value	31,816	28,602
U.S. Treasury securities, obligations of U.S. Government agencies and Municipals
Schedule of Available-for-sale Securities [Line Items]
Cost	30,063	26,280
Gross Unrealized Gains	3	11
Gross Unrealized Losses	(98)	(59)
Fair Value	29,968	26,232
Corporate debt
Schedule of Available-for-sale Securities [Line Items]
Cost	1,832	2,358
Gross Unrealized Gains	16	13
Gross Unrealized Losses	0	(1)
Fair Value	$ 1,848	$ 2,370

Investments - Summary of Unreal

Investments - Summary of Unrealized Loss Position (Detail) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Schedule of Available-for-sale Securities [Line Items]
Fair Value, Less than 12 Months	$ 27,361	$ 15,664
Unrealized Losses, Less than 12 Months	(98)	(60)
Fair Value, 12 Months or More	0	0
Unrealized Losses, 12 Months or More	0	0
Fair Value	27,361	15,664
Unrealized Losses	(98)	(60)
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	26,886	14,663
Unrealized Losses, Less than 12 Months	(98)	(59)
Fair Value, 12 Months or More	0	0
Unrealized Losses, 12 Months or More	0	0
Fair Value	26,886	14,663
Unrealized Losses	(98)	(59)
Corporate debt
Schedule of Available-for-sale Securities [Line Items]
Fair Value, Less than 12 Months	475	1,001
Unrealized Losses, Less than 12 Months	0	(1)
Fair Value, 12 Months or More	0	0
Unrealized Losses, 12 Months or More	0	0
Fair Value	475	1,001
Unrealized Losses	$ 0	$ (1)

Investments - Additional Inform

Investments - Additional Information (Detail) $ in Thousands	6 Months Ended
	Jun. 30, 2017USD ($)Securities	Dec. 31, 2016USD ($)Securities
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities	$ 31,816	$ 28,602
Number of securities in unrealized loss position | Securities	27	20
Proceeds from sale of investment in fixed maturity securities	$ 500
Proceeds from Sale of Other Investments	$ 2,900
Investment security maturity date, start	Jan. 1, 2017
Investment security maturity date, End	Jun. 30, 2017
Gross realized gains and losses of securities	insignificant
Investments on deposit with the state insurance department	$ 4,000
U.S. Treasury securities, obligations of U.S. Government agencies and Municipals
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities	$ 29,968	$ 26,232

Investments - Amortized Cost an

Investments - Amortized Cost and Fair Value of Fixed Maturity Securities by Contractual Maturity (Detail) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Amortized Cost
Due in one year or less	$ 20,993	$ 5,551
Due after one year through five years	10,572	22,757
Due after five years	330	330
Amortized Cost, Total	31,895	28,638
Fair Value
Due in one year or less	20,940	5,554
Due after one year through five years	10,533	22,708
Due after five years	343	340
Fair Value, Total	$ 31,816	$ 28,602

Losses and Loss Adjustment Re53

Losses and Loss Adjustment Reserve - Effects of Reinsurance on Premiums Written and Earned (Detail) $ in Thousands	6 Months Ended
	Jun. 30, 2017USD ($)
Written
Direct premiums	$ 277,930
Ceded premiums	(277,925)
Net premiums	5
Earned
Direct premiums	288,856
Ceded premiums	(288,851)
Net premiums	$ 5

Losses and Loss Adjustment Re54

Losses and Loss Adjustment Reserve - Additional Information (Detail)	6 Months Ended
	Jun. 30, 2017USD ($)Reinsurer	Dec. 31, 2016USD ($)
Reinsurance Premiums for Insurance Companies, by Product Segment [Line Items]
Ceded rate of premiums under insurance program	100.00%
Premiums written net	$ 277,925,000
Ceded unpaid loss	22,500,000
Prepaid reinsurance premiums	297,736,000	$ 308,661,000
Increase (Decrease) in Loss and Loss Adjustment Expense Reserve	0
Reserve for losses and loss adjustment expense	$ 22,500,000
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	$ 277,200,000
Wright Flood | Quota Share Agreement
Reinsurance Premiums for Insurance Companies, by Product Segment [Line Items]
Effective cedes rate under quota share agreement	100.00%
Commission rate, percent of ceded written premiums	30.50%
Ceded amount	$ 700,000

Statutory Financial Informati55

Statutory Financial Information - Additional Information (Detail) - Wright Flood - USD ($)	6 Months Ended	12 Months Ended
	Jun. 30, 2017	Dec. 31, 2016
Statutory Accounting Practices [Line Items]
Statutory capital and surplus required	$ 7,500,000
Statutory capital and surplus	25,300,000	$ 23,500,000
Statutory net Income	$ 1,600,000	$ 8,200,000

Subsidiary Dividend Restricti56

Subsidiary Dividend Restrictions - Additional Information (Detail) - Wright Flood $ in Millions	6 Months Ended
	Jun. 30, 2017USD ($)
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	$ 8.2
Maximum
Dividend Restrictions [Line Items]
Dividend rate as a percentage of net income	10.00%

Shareholders' Equity - Addition

Shareholders' Equity - Additional Information (Detail) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Accelerated Share Repurchases [Line Items]
Shares repurchased, number of shares received initially (in shares)	8,264,812	8,003,197
Fair value of common stock repurchased	$ 268,842	$ 257,683
Repurchase Agreements [Member]
Accelerated Share Repurchases [Line Items]
Shares repurchased, authorized amount	$ 100,000