$BRO
BROWN & BROWN, INC. Stock $bro

$bro Overview Financials Valuation SEC Filings Company Website

2016 Q4 Form 10-K Financial Statement

#000007928218000006 Filed on February 28, 2018

Income Statement

Concept	2016 Q4	2016 Q3	2016 Q2
Revenue	$433.7M	$462.3M	$446.5M
YoY Change	7.18%	6.97%	6.45%
Cost Of Revenue
YoY Change
Gross Profit
YoY Change
Gross Profit Margin
Selling, General & Admin	$232.4M	$237.7M	$231.1M
YoY Change	9.88%	9.94%	6.2%
% of Gross Profit
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$26.80M	$5.195M	$5.354M
YoY Change	-1.83%	-0.38%	2.23%
% of Gross Profit
Operating Expenses	$338.8M	$345.3M	$337.4M
YoY Change	9.43%	8.13%	5.94%
Operating Profit
YoY Change
Interest Expense	-$9.900M	$9.883M	$9.837M
YoY Change	1.02%	0.01%	1.72%
% of Operating Profit
Other Income/Expense, Net
YoY Change
Pretax Income	$94.90M	$117.0M	$109.1M
YoY Change	-0.14%	3.67%	8.09%
Income Tax	$37.30M	$45.43M	$42.83M
% Of Pretax Income	39.3%	38.84%	39.26%
Net Earnings	$57.63M	$71.55M	$66.25M
YoY Change	-0.53%	6.11%	8.6%
Net Earnings / Revenue	13.29%	15.48%	14.84%
Basic Earnings Per Share	$0.00	$0.01	$0.00
Diluted Earnings Per Share	$0.00	$0.01	$0.00
COMMON SHARES
Basic Shares Outstanding		136.5M shares	136.0M shares
Diluted Shares Outstanding		138.2M shares	137.6M shares

Balance Sheet

Concept	2016 Q4	2016 Q3	2016 Q2
SHORT-TERM ASSETS
Cash & Short-Term Investments	$530.7M	$502.0M	$470.0M
YoY Change	16.08%	9.27%	11.03%
Cash & Equivalents	$515.6M	$488.7M	$453.9M
Short-Term Investments	$15.00M	$13.30M	$16.10M
Other Short-Term Assets	$50.57M	$42.04M	$52.11M
YoY Change	0.44%	-27.88%	-19.65%
Inventory
Prepaid Expenses
Receivables	$502.5M	$469.5M	$472.2M
Other Receivables	$78.10M	$332.0M	$60.80M
Total Short-Term Assets	$1.736B	$1.975B	$1.647B
YoY Change	12.93%	27.91%	6.45%
LONG-TERM ASSETS
Property, Plant & Equipment	$75.81M	$77.77M	$80.49M
YoY Change	-7.27%	-4.39%	-2.8%
Goodwill	$2.675B	$2.672B	$2.665B
YoY Change	3.43%	4.43%	4.12%
Intangibles	$707.5M	$726.1M	$745.4M
YoY Change	-5.0%	-4.22%	-3.46%
Long-Term Investments	$23.00M	$26.30M	$23.00M
YoY Change	27.07%	14.85%	8.49%
Other Assets	$44.90M	$44.77M	$45.43M
YoY Change	25.12%	21.13%	21.54%
Total Long-Term Assets	$3.527B	$3.547B	$3.560B
YoY Change	2.44%	2.57%	2.48%
TOTAL ASSETS
Total Short-Term Assets	$1.736B	$1.975B	$1.647B
Total Long-Term Assets	$3.527B	$3.547B	$3.560B
Total Assets	$5.263B	$5.522B	$5.207B
YoY Change	5.68%	10.39%	3.71%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$69.60M	$53.91M	$91.59M
YoY Change	8.9%	-5.21%	55.4%
Accrued Expenses	$202.0M	$171.2M	$163.5M
YoY Change	5.17%	-0.7%	0.93%
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change	-100.0%
Long-Term Debt Due	$55.50M	$80.49M	$80.49M
YoY Change	-24.1%	95.13%	134.16%
Total Short-Term Liabilities	$1.445B	$1.702B	$1.458B
YoY Change	8.78%	34.57%	9.74%
LONG-TERM LIABILITIES
Long-Term Debt	$1.018B	$1.032B	$1.045B
YoY Change	-4.97%	-7.77%	-7.71%
Other Long-Term Liabilities	$81.31M	$87.17M	$80.87M
YoY Change	-13.12%	1.71%	-24.35%
Total Long-Term Liabilities	$1.100B	$1.119B	$1.126B
YoY Change	-5.62%	-7.09%	-9.14%
TOTAL LIABILITIES
Total Short-Term Liabilities	$1.445B	$1.702B	$1.458B
Total Long-Term Liabilities	$1.100B	$1.119B	$1.126B
Total Liabilities	$2.545B	$2.821B	$2.584B
YoY Change	2.05%	14.25%	0.62%
SHAREHOLDERS EQUITY
Retained Earnings	$2.135B	$2.096B	$2.042B
YoY Change	9.61%	9.92%	10.07%
Common Stock	$483.3M	$478.8M	$460.7M
YoY Change	9.55%	5.48%	10.16%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$257.7M	$250.0M	$250.0M
YoY Change	7.92%	42.85%	56.24%
Treasury Stock Shares	8.003M shares	7.794M shares	7.794M shares
Shareholders Equity	$2.360B	$2.325B	$2.252B
YoY Change
Total Liabilities & Shareholders Equity	$5.263B	$5.522B	$5.207B
YoY Change	5.16%	10.39%	3.71%

Cashflow Statement

Concept	2016 Q4	2016 Q3	2016 Q2
OPERATING ACTIVITIES
Net Income	$57.63M	$71.55M	$66.25M
YoY Change	-0.53%	6.11%	8.6%
Depreciation, Depletion And Amortization	$26.80M	$5.195M	$5.354M
YoY Change	-1.83%	-0.38%	2.23%
Cash From Operating Activities	$91.90M	$128.3M	$157.6M
YoY Change	-24.17%	103.01%	-10.81%
INVESTING ACTIVITIES
Capital Expenditures	-$4.700M	$4.191M	$4.692M
YoY Change	-16.07%	0.36%	-3.66%
Acquisitions
YoY Change
Other Investing Activities	-$7.200M	-$6.400M	-$70.40M
YoY Change	-61.7%	16.36%	-0.71%
Cash From Investing Activities	-$11.80M	-$10.60M	-$75.10M
YoY Change	-51.44%	9.28%	-0.92%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-65.70M	-34.50M	-31.70M
YoY Change	-35.71%	99.42%	8.93%
NET CHANGE
Cash From Operating Activities	91.90M	128.3M	157.6M
Cash From Investing Activities	-11.80M	-10.60M	-75.10M
Cash From Financing Activities	-65.70M	-34.50M	-31.70M
Net Change In Cash	14.40M	83.20M	50.80M
YoY Change	-371.7%	129.83%	-29.25%
FREE CASH FLOW
Cash From Operating Activities	$91.90M	$128.3M	$157.6M
Capital Expenditures	-$4.700M	$4.191M	$4.692M
Free Cash Flow	$96.60M	$124.1M	$152.9M
YoY Change	-23.82%	110.27%	-11.01%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
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CY2017	dei	Amendment Flag AmendmentFlag	false
CY2017	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2017	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2017	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2017
CY2017	dei	Document Type DocumentType	10-K
CY2017	dei	Entity Central Index Key EntityCentralIndexKey	0000079282
CY2017	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2017	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2017	dei	Entity Registrant Name EntityRegistrantName	BROWN & BROWN, INC.
CY2017	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2017	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	No
CY2017	dei	Trading Symbol TradingSymbol	BRO
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CY2016	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	0	USD
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CY2015	bro	Change In Estimated Acquisition Earn Out Payable ChangeInEstimatedAcquisitionEarnOutPayable	3003000	USD
CY2017	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-102183000	USD
CY2016	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	18163000	USD
CY2015	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	22696000	USD
CY2017	us-gaap	Excess Tax Benefit From Share Based Compensation Operating Activities ExcessTaxBenefitFromShareBasedCompensationOperatingActivities	0	USD
CY2017	us-gaap	Amortization Of Debt Discount Premium AmortizationOfDebtDiscountPremium	158000	USD
CY2016	us-gaap	Amortization Of Debt Discount Premium AmortizationOfDebtDiscountPremium	165000	USD
CY2015	us-gaap	Amortization Of Debt Discount Premium AmortizationOfDebtDiscountPremium	157000	USD
CY2017	us-gaap	Deferred Finance Costs Own Share Lending Arrangement Issuance Costs Amortization Expense1 DeferredFinanceCostsOwnShareLendingArrangementIssuanceCostsAmortizationExpense1	1682000	USD
CY2016	us-gaap	Deferred Finance Costs Own Share Lending Arrangement Issuance Costs Amortization Expense1 DeferredFinanceCostsOwnShareLendingArrangementIssuanceCostsAmortizationExpense1	1597000	USD
CY2015	us-gaap	Deferred Finance Costs Own Share Lending Arrangement Issuance Costs Amortization Expense1 DeferredFinanceCostsOwnShareLendingArrangementIssuanceCostsAmortizationExpense1	0	USD
CY2017	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-22000	USD
CY2016	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	39000	USD
CY2015	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	0	USD
CY2016	us-gaap	Excess Tax Benefit From Share Based Compensation Operating Activities ExcessTaxBenefitFromShareBasedCompensationOperatingActivities	7346000	USD
CY2015	us-gaap	Excess Tax Benefit From Share Based Compensation Operating Activities ExcessTaxBenefitFromShareBasedCompensationOperatingActivities	3276000	USD
CY2017	bro	Net Loss Gain On Sales Of Investments Fixed Assets And Customer Accounts NetLossGainOnSalesOfInvestmentsFixedAssetsAndCustomerAccounts	1841000	USD
CY2016	bro	Net Loss Gain On Sales Of Investments Fixed Assets And Customer Accounts NetLossGainOnSalesOfInvestmentsFixedAssetsAndCustomerAccounts	-596000	USD
CY2015	bro	Net Loss Gain On Sales Of Investments Fixed Assets And Customer Accounts NetLossGainOnSalesOfInvestmentsFixedAssetsAndCustomerAccounts	107000	USD
CY2017	bro	Payments On Acquisition Earn Outs In Excess Of Original Estimated Payables PaymentsOnAcquisitionEarnOutsInExcessOfOriginalEstimatedPayables	14501000	USD
CY2016	bro	Payments On Acquisition Earn Outs In Excess Of Original Estimated Payables PaymentsOnAcquisitionEarnOutsInExcessOfOriginalEstimatedPayables	3904000	USD
CY2015	bro	Payments On Acquisition Earn Outs In Excess Of Original Estimated Payables PaymentsOnAcquisitionEarnOutsInExcessOfOriginalEstimatedPayables	11383000	USD
CY2017	bro	Increase Decrease In Premiums Commission And Fees Receivable IncreaseDecreaseInPremiumsCommissionAndFeesReceivable	43306000	USD
CY2016	bro	Increase Decrease In Premiums Commission And Fees Receivable IncreaseDecreaseInPremiumsCommissionAndFeesReceivable	63550000	USD
CY2015	bro	Increase Decrease In Premiums Commission And Fees Receivable IncreaseDecreaseInPremiumsCommissionAndFeesReceivable	7163000	USD
CY2017	us-gaap	Increase Decrease In Reinsurance Recoverable IncreaseDecreaseInReinsuranceRecoverable	399737000	USD
CY2016	us-gaap	Increase Decrease In Reinsurance Recoverable IncreaseDecreaseInReinsuranceRecoverable	46115000	USD
CY2015	us-gaap	Increase Decrease In Reinsurance Recoverable IncreaseDecreaseInReinsuranceRecoverable	18940000	USD
CY2017	us-gaap	Increase Decrease In Prepaid Reinsurance Premiums IncreaseDecreaseInPrepaidReinsurancePremiums	12356000	USD
CY2016	us-gaap	Increase Decrease In Prepaid Reinsurance Premiums IncreaseDecreaseInPrepaidReinsurancePremiums	-982000	USD
CY2015	us-gaap	Increase Decrease In Prepaid Reinsurance Premiums IncreaseDecreaseInPrepaidReinsurancePremiums	-10943000	USD
CY2017	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	9747000	USD
CY2016	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	4718000	USD
CY2015	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	5318000	USD
CY2017	bro	Increase Decrease In Premiums Payable To Insurance Companies IncreaseDecreaseInPremiumsPayableToInsuranceCompanies	37380000	USD
CY2016	bro	Increase Decrease In Premiums Payable To Insurance Companies IncreaseDecreaseInPremiumsPayableToInsuranceCompanies	66084000	USD
CY2015	bro	Increase Decrease In Premiums Payable To Insurance Companies IncreaseDecreaseInPremiumsPayableToInsuranceCompanies	542000	USD
CY2017	bro	Increase Decrease In Premium Deposits And Credits Due Customers Decrease Increase IncreaseDecreaseInPremiumDepositsAndCreditsDueCustomersDecreaseIncrease	7750000	USD
CY2016	bro	Increase Decrease In Premium Deposits And Credits Due Customers Decrease Increase IncreaseDecreaseInPremiumDepositsAndCreditsDueCustomersDecreaseIncrease	527000	USD
CY2015	bro	Increase Decrease In Premium Deposits And Credits Due Customers Decrease Increase IncreaseDecreaseInPremiumDepositsAndCreditsDueCustomersDecreaseIncrease	-2973000	USD
CY2017	bro	Increase Decrease For Loss And Loss Adjustment Expense IncreaseDecreaseForLossAndLossAdjustmentExpense	398638000	USD
CY2016	bro	Increase Decrease For Loss And Loss Adjustment Expense IncreaseDecreaseForLossAndLossAdjustmentExpense	46115000	USD
CY2015	bro	Increase Decrease For Loss And Loss Adjustment Expense IncreaseDecreaseForLossAndLossAdjustmentExpense	18940000	USD
CY2017	us-gaap	Increase Decrease In Unearned Premiums IncreaseDecreaseInUnearnedPremiums	12356000	USD
CY2016	us-gaap	Increase Decrease In Unearned Premiums IncreaseDecreaseInUnearnedPremiums	-982000	USD
CY2015	us-gaap	Increase Decrease In Unearned Premiums IncreaseDecreaseInUnearnedPremiums	-10943000	USD
CY2017	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	26798000	USD
CY2016	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	30174000	USD
CY2015	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	34206000	USD
CY2017	us-gaap	Increase Decrease In Accrued Liabilities And Other Operating Liabilities IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities	25509000	USD
CY2016	us-gaap	Increase Decrease In Accrued Liabilities And Other Operating Liabilities IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities	8670000	USD
CY2015	us-gaap	Increase Decrease In Accrued Liabilities And Other Operating Liabilities IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities	8204000	USD
CY2017	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-32252000	USD
CY2016	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-25849000	USD
CY2015	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-23898000	USD
CY2017	us-gaap	Net Cash Provided By Used In Operating Activities Continuing Operations NetCashProvidedByUsedInOperatingActivitiesContinuingOperations	441975000	USD
CY2016	us-gaap	Net Cash Provided By Used In Operating Activities Continuing Operations NetCashProvidedByUsedInOperatingActivitiesContinuingOperations	411042000	USD
CY2015	us-gaap	Net Cash Provided By Used In Operating Activities Continuing Operations NetCashProvidedByUsedInOperatingActivitiesContinuingOperations	381832000	USD
CY2017	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	24192000	USD
CY2016	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	17765000	USD
CY2015	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	18375000	USD
CY2017	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	41471000	USD
CY2016	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	122622000	USD
CY2015	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	136000000	USD
CY2017	us-gaap	Proceeds From Sale Of Productive Assets ProceedsFromSaleOfProductiveAssets	4094000	USD
CY2016	us-gaap	Proceeds From Sale Of Productive Assets ProceedsFromSaleOfProductiveAssets	4957000	USD
CY2015	us-gaap	Proceeds From Sale Of Productive Assets ProceedsFromSaleOfProductiveAssets	10576000	USD
CY2017	us-gaap	Payments To Acquire Investments PaymentsToAcquireInvestments	10665000	USD
CY2016	us-gaap	Payments To Acquire Investments PaymentsToAcquireInvestments	25872000	USD
CY2015	us-gaap	Payments To Acquire Investments PaymentsToAcquireInvestments	22766000	USD
CY2017	us-gaap	Proceeds From Sale Maturity And Collections Of Investments ProceedsFromSaleMaturityAndCollectionsOfInvestments	9644000	USD
CY2016	us-gaap	Proceeds From Sale Maturity And Collections Of Investments ProceedsFromSaleMaturityAndCollectionsOfInvestments	18890000	USD
CY2015	us-gaap	Proceeds From Sale Maturity And Collections Of Investments ProceedsFromSaleMaturityAndCollectionsOfInvestments	21928000	USD
CY2017	us-gaap	Net Cash Provided By Used In Investing Activities Continuing Operations NetCashProvidedByUsedInInvestingActivitiesContinuingOperations	-62590000	USD
CY2016	us-gaap	Net Cash Provided By Used In Investing Activities Continuing Operations NetCashProvidedByUsedInInvestingActivitiesContinuingOperations	-142412000	USD
CY2015	us-gaap	Net Cash Provided By Used In Investing Activities Continuing Operations NetCashProvidedByUsedInInvestingActivitiesContinuingOperations	-144637000	USD
CY2017	bro	Payments On Acquisition Earn Outs PaymentsOnAcquisitionEarnOuts	29265000	USD
CY2016	bro	Payments On Acquisition Earn Outs PaymentsOnAcquisitionEarnOuts	24309000	USD
CY2015	bro	Payments On Acquisition Earn Outs PaymentsOnAcquisitionEarnOuts	25415000	USD
CY2017	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	96750000	USD
CY2016	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	73125000	USD
CY2015	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	45625000	USD
CY2017	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	2821000	USD
CY2017	us-gaap	Excess Tax Benefit From Share Based Compensation Financing Activities ExcessTaxBenefitFromShareBasedCompensationFinancingActivities	0	USD
CY2016	us-gaap	Excess Tax Benefit From Share Based Compensation Financing Activities ExcessTaxBenefitFromShareBasedCompensationFinancingActivities	7346000	USD
CY2015	us-gaap	Net Cash Provided By Used In Operating Activities Continuing Operations NetCashProvidedByUsedInOperatingActivitiesContinuingOperations	381800000	USD
CY2015	us-gaap	Excess Tax Benefit From Share Based Compensation Financing Activities ExcessTaxBenefitFromShareBasedCompensationFinancingActivities	3276000	USD
CY2017	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	17422000	USD
CY2016	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	15983000	USD
CY2015	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	15890000	USD
CY2017	bro	Repurchase Of Stock Benefit Plan Shares For Employees To Fund Tax Withholdings RepurchaseOfStockBenefitPlanSharesForEmployeesToFundTaxWithholdings	7565000	USD
CY2016	bro	Repurchase Of Stock Benefit Plan Shares For Employees To Fund Tax Withholdings RepurchaseOfStockBenefitPlanSharesForEmployeesToFundTaxWithholdings	8495000	USD
CY2015	bro	Repurchase Of Stock Benefit Plan Shares For Employees To Fund Tax Withholdings RepurchaseOfStockBenefitPlanSharesForEmployeesToFundTaxWithholdings	2857000	USD
CY2017	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	128639000	USD
CY2016	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	18908000	USD
CY2015	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	163750000	USD
CY2017	us-gaap	Payments For Repurchase Of Other Equity PaymentsForRepurchaseOfOtherEquity	11250000	USD
CY2016	us-gaap	Payments For Repurchase Of Other Equity PaymentsForRepurchaseOfOtherEquity	-11250000	USD
CY2015	us-gaap	Payments For Repurchase Of Other Equity PaymentsForRepurchaseOfOtherEquity	-11250000	USD
CY2017	us-gaap	Payments Of Dividends PaymentsOfDividends	77712000	USD
CY2016	us-gaap	Payments Of Dividends PaymentsOfDividends	70262000	USD
CY2015	us-gaap	Payments Of Dividends PaymentsOfDividends	64108000	USD
CY2017	us-gaap	Net Cash Provided By Used In Financing Activities Continuing Operations NetCashProvidedByUsedInFinancingActivitiesContinuingOperations	-336580000	USD
CY2016	us-gaap	Net Cash Provided By Used In Financing Activities Continuing Operations NetCashProvidedByUsedInFinancingActivitiesContinuingOperations	-160520000	USD
CY2015	us-gaap	Net Cash Provided By Used In Financing Activities Continuing Operations NetCashProvidedByUsedInFinancingActivitiesContinuingOperations	-293839000	USD
CY2017	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	42805000	USD
CY2016	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	108110000	USD
CY2015	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	-56644000	USD
CY2016	bro	Cash Cash Equivalentsand Restricted Cash CashCashEquivalentsandRestrictedCash	781283000	USD
CY2015	bro	Cash Cash Equivalentsand Restricted Cash CashCashEquivalentsandRestrictedCash	673173000	USD
CY2014	bro	Cash Cash Equivalentsand Restricted Cash CashCashEquivalentsandRestrictedCash	729817000	USD
CY2017	bro	Cash Cash Equivalentsand Restricted Cash CashCashEquivalentsandRestrictedCash	824088000	USD
CY2016	bro	Cash Cash Equivalentsand Restricted Cash CashCashEquivalentsandRestrictedCash	781283000	USD
CY2015	bro	Cash Cash Equivalentsand Restricted Cash CashCashEquivalentsandRestrictedCash	673173000	USD
CY2017	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	4	Segment
CY2016	us-gaap	Net Cash Provided By Used In Operating Activities Continuing Operations NetCashProvidedByUsedInOperatingActivitiesContinuingOperations	411000000.0	USD
CY2016Q4	us-gaap	Operating Leases Future Minimum Payments Due OperatingLeasesFutureMinimumPaymentsDue	213200000	USD
CY2017Q4	us-gaap	Operating Leases Future Minimum Payments Due OperatingLeasesFutureMinimumPaymentsDue	210400000	USD
CY2017	bro	Deferred Tax Assets Netted Against Deferred Tax Liabilities DeferredTaxAssetsNettedAgainstDeferredTaxLiabilities	24600000	USD
CY2017	us-gaap	Use Of Estimates UseOfEstimates	Use of Estimates The preparation of the Consolidated Financial Statements in conformity with accounting principles generally accepted in the United States of America (“U.S. GAAP”) requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, as well as disclosures of contingent assets and liabilities, at the date of the Consolidated Financial Statements, and the reported amounts of revenues and expenses during the reporting period. Actual results may differ from those estimates
CY2017	bro	Average Annual Operating Profit Earned Period Maximum AverageAnnualOperatingProfitEarnedPeriodMaximum	P3Y
CY2017	us-gaap	Net Income Loss NetIncomeLoss	399630000	USD
CY2016	us-gaap	Net Income Loss NetIncomeLoss	257491000	USD
CY2015	us-gaap	Net Income Loss NetIncomeLoss	243318000	USD
CY2017	bro	Net Income Attributable To Unvested Awarded Performance Stock NetIncomeAttributableToUnvestedAwardedPerformanceStock	9746000	USD
CY2016	bro	Net Income Attributable To Unvested Awarded Performance Stock NetIncomeAttributableToUnvestedAwardedPerformanceStock	6705000	USD
CY2015	bro	Net Income Attributable To Unvested Awarded Performance Stock NetIncomeAttributableToUnvestedAwardedPerformanceStock	5695000	USD
CY2017	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	389884000	USD
CY2016	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	250786000	USD
CY2015	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	237623000	USD
CY2017	us-gaap	Weighted Average Number Of Shares Issued Basic WeightedAverageNumberOfSharesIssuedBasic	139697000	shares
CY2016	us-gaap	Weighted Average Number Of Shares Issued Basic WeightedAverageNumberOfSharesIssuedBasic	139779000	shares
CY2015	us-gaap	Weighted Average Number Of Shares Issued Basic WeightedAverageNumberOfSharesIssuedBasic	141113000	shares
CY2017	us-gaap	Incremental Common Shares Attributable To Participating Nonvested Shares With Non Forfeitable Dividend Rights IncrementalCommonSharesAttributableToParticipatingNonvestedSharesWithNonForfeitableDividendRights	3407000	shares
CY2016	us-gaap	Incremental Common Shares Attributable To Participating Nonvested Shares With Non Forfeitable Dividend Rights IncrementalCommonSharesAttributableToParticipatingNonvestedSharesWithNonForfeitableDividendRights	3640000	shares
CY2015	us-gaap	Incremental Common Shares Attributable To Participating Nonvested Shares With Non Forfeitable Dividend Rights IncrementalCommonSharesAttributableToParticipatingNonvestedSharesWithNonForfeitableDividendRights	3303000	shares
CY2017	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	136290000	shares
CY2016	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	136139000	shares
CY2015	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	137810000	shares
CY2017	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	2503000	shares
CY2016	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	1665000	shares
CY2015	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	2302000	shares
CY2017	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	138793000	shares
CY2016	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	137804000	shares
CY2015	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	140112000	shares
CY2017	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.86
CY2016	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.84
CY2015	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.72
CY2017	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.81
CY2016	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.82
CY2015	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.70
CY2017Q4	us-gaap	Long Term Debt Fair Value LongTermDebtFairValue	598900000	USD
CY2017Q4	us-gaap	Long Term Debt Fair Value LongTermDebtFairValue	598900000	USD
CY2017	bro	Debt Instrument Revolving And Term Loan DebtInstrumentRevolvingAndTermLoan	385000000.0	USD
CY2017	bro	Business Acquisitions Purchase Price Allocation Adjustment Purchase Price BusinessAcquisitionsPurchasePriceAllocationAdjustmentPurchasePrice	1500000	USD
CY2017	us-gaap	Payments To Acquire Businesses Gross PaymentsToAcquireBusinessesGross	41500000	USD
CY2016	us-gaap	Payments To Acquire Businesses Gross PaymentsToAcquireBusinessesGross	124700000	USD
CY2017	us-gaap	Number Of Businesses Acquired NumberOfBusinessesAcquired	11	acquisition
CY2016	us-gaap	Number Of Businesses Acquired NumberOfBusinessesAcquired	8	acquisition
CY2017	us-gaap	Payments To Acquire Businesses Gross PaymentsToAcquireBusinessesGross	41471000	USD
CY2017Q4	bro	Business Acquisition Cost Of Acquired Entity Other Payable BusinessAcquisitionCostOfAcquiredEntityOtherPayable	11708000	USD
CY2017Q4	bro	Business Acquisitions Contingent Consideration At Fair Value BusinessAcquisitionsContingentConsiderationAtFairValue	6921000	USD
CY2017Q4	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Net BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet	60100000	USD
CY2017Q4	us-gaap	Business Combination Contingent Consideration Arrangements Range Of Outcomes Value High BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh	27451000	USD
CY2017Q4	bro	Business Acquisition Purchase Price Allocation Current Assets Prepaid Expenses And Other Assets BusinessAcquisitionPurchasePriceAllocationCurrentAssetsPrepaidExpensesAndOtherAssets	601000	USD
CY2017Q4	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Property Plant And Equipment BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment	69000	USD
CY2017Q4	us-gaap	Goodwill Fair Value Disclosure GoodwillFairValueDisclosure	42172000	USD
CY2017Q4	bro	Business Acquisitions Purchase Price Allocation Amortizable Intangible Assets BusinessAcquisitionsPurchasePriceAllocationAmortizableIntangibleAssets	18738000	USD
CY2017Q4	bro	Business Acquisitions Purchase Price Allocation Noncompete Agreements Gross BusinessAcquisitionsPurchasePriceAllocationNoncompeteAgreementsGross	721000	USD
CY2017Q4	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Assets BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets	62301000	USD
CY2017Q4	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Current Liabilities Other BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesOther	1512000	USD
CY2017Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	689000	USD
CY2017Q4	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Liabilities BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities	2201000	USD
CY2017Q4	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Net BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet	60100000	USD
CY2017Q4	us-gaap	Goodwill Fair Value Disclosure GoodwillFairValueDisclosure	42200000	USD
CY2017Q4	us-gaap	Goodwill Fair Value Disclosure GoodwillFairValueDisclosure	42200000	USD
CY2017Q4	us-gaap	Business Acquisition Purchase Price Allocation Goodwill Expected Tax Deductible Amount BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductibleAmount	35300000	USD
CY2017Q4	bro	Earn Out Payable Not Deductible Until Earned Paid EarnOutPayableNotDeductibleUntilEarnedPaid	6900000	USD
CY2017	us-gaap	Business Combination Pro Forma Information Revenue Of Acquiree Since Acquisition Date Actual BusinessCombinationProFormaInformationRevenueOfAcquireeSinceAcquisitionDateActual	7800000	USD
CY2017	bro	Business Combination Pro Forma Information Income Loss Before Income Taxes Of Acquiree Since Acquisition Date Actual BusinessCombinationProFormaInformationIncomeLossBeforeIncomeTaxesOfAcquireeSinceAcquisitionDateActual	2400000	USD
CY2016	bro	Business Acquisitions Purchase Price Allocation Adjustment Purchase Price BusinessAcquisitionsPurchasePriceAllocationAdjustmentPurchasePrice	917497	USD
CY2016	us-gaap	Payments To Acquire Businesses Gross PaymentsToAcquireBusinessesGross	124716000	USD
CY2016Q4	bro	Business Acquisition Cost Note Payable BusinessAcquisitionCostNotePayable	492000	USD
CY2016Q4	bro	Business Acquisition Cost Of Acquired Entity Other Payable BusinessAcquisitionCostOfAcquiredEntityOtherPayable	10664000	USD
CY2016Q4	bro	Business Acquisitions Contingent Consideration At Fair Value BusinessAcquisitionsContingentConsiderationAtFairValue	4462000	USD
CY2016Q4	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Net BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet	140334000	USD
CY2016Q4	us-gaap	Business Combination Contingent Consideration Arrangements Range Of Outcomes Value High BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh	16285000	USD
CY2016Q4	bro	Business Acquisitions Purchase Price Allocation Current Assets Cash And Cash Equivalents BusinessAcquisitionsPurchasePriceAllocationCurrentAssetsCashAndCashEquivalents	2094000	USD
CY2016Q4	bro	Business Acquisition Purchase Price Allocation Current Assets Prepaid Expenses And Other Assets BusinessAcquisitionPurchasePriceAllocationCurrentAssetsPrepaidExpensesAndOtherAssets	5079000	USD
CY2016Q4	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Property Plant And Equipment BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment	684000	USD
CY2016Q4	us-gaap	Goodwill Fair Value Disclosure GoodwillFairValueDisclosure	93376000	USD
CY2016Q4	bro	Business Acquisitions Purchase Price Allocation Amortizable Intangible Assets BusinessAcquisitionsPurchasePriceAllocationAmortizableIntangibleAssets	50625000	USD
CY2016Q4	bro	Business Acquisitions Purchase Price Allocation Noncompete Agreements Gross BusinessAcquisitionsPurchasePriceAllocationNoncompeteAgreementsGross	228000	USD
CY2016Q4	bro	Business Acquisitions Purchase Price Allocation Other Noncurrent Assets BusinessAcquisitionsPurchasePriceAllocationOtherNoncurrentAssets	20000	USD
CY2016Q4	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Assets BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets	152106000	USD
CY2016Q4	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Current Liabilities Other BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesOther	8542000	USD
CY2016Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	3230000	USD
CY2016Q4	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Liabilities BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities	11772000	USD
CY2016Q4	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Net BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet	140334000	USD
CY2016Q4	us-gaap	Goodwill Fair Value Disclosure GoodwillFairValueDisclosure	93400000	USD
CY2016Q4	us-gaap	Goodwill Fair Value Disclosure GoodwillFairValueDisclosure	93400000	USD
CY2016Q4	us-gaap	Business Acquisition Purchase Price Allocation Goodwill Expected Tax Deductible Amount BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductibleAmount	88900000	USD
CY2016Q4	bro	Earn Out Payable Not Deductible Until Earned Paid EarnOutPayableNotDeductibleUntilEarnedPaid	4500000	USD
CY2016	us-gaap	Business Combination Pro Forma Information Revenue Of Acquiree Since Acquisition Date Actual BusinessCombinationProFormaInformationRevenueOfAcquireeSinceAcquisitionDateActual	34200000	USD
CY2016	bro	Business Combination Pro Forma Information Income Loss Before Income Taxes Of Acquiree Since Acquisition Date Actual BusinessCombinationProFormaInformationIncomeLossBeforeIncomeTaxesOfAcquireeSinceAcquisitionDateActual	4300000	USD
CY2015	us-gaap	Payments To Acquire Businesses Gross PaymentsToAcquireBusinessesGross	136000000.0	USD
CY2015	bro	Business Acquisitions Purchase Price Allocation Adjustment Purchase Price BusinessAcquisitionsPurchasePriceAllocationAdjustmentPurchasePrice	503442	USD
CY2015	us-gaap	Payments To Acquire Businesses Gross PaymentsToAcquireBusinessesGross	136000000	USD
CY2015Q4	bro	Business Acquisition Cost Of Acquired Entity Other Payable BusinessAcquisitionCostOfAcquiredEntityOtherPayable	10028000	USD
CY2015Q4	bro	Business Acquisitions Contingent Consideration At Fair Value BusinessAcquisitionsContingentConsiderationAtFairValue	36899000	USD
CY2015Q4	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Net BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet	182927000	USD
CY2015Q4	us-gaap	Business Combination Contingent Consideration Arrangements Range Of Outcomes Value High BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh	73074000	USD
CY2015Q4	bro	Business Acquisition Purchase Price Allocation Current Assets Prepaid Expenses And Other Assets BusinessAcquisitionPurchasePriceAllocationCurrentAssetsPrepaidExpensesAndOtherAssets	3640000	USD
CY2015Q4	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Property Plant And Equipment BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment	374000	USD
CY2015Q4	us-gaap	Goodwill Fair Value Disclosure GoodwillFairValueDisclosure	136381000	USD
CY2015Q4	bro	Business Acquisitions Purchase Price Allocation Amortizable Intangible Assets BusinessAcquisitionsPurchasePriceAllocationAmortizableIntangibleAssets	53392000	USD
CY2015Q4	bro	Business Acquisitions Purchase Price Allocation Noncompete Agreements Gross BusinessAcquisitionsPurchasePriceAllocationNoncompeteAgreementsGross	328000	USD
CY2015Q4	bro	Business Acquisitions Purchase Price Allocation Other Noncurrent Assets BusinessAcquisitionsPurchasePriceAllocationOtherNoncurrentAssets	14000	USD
CY2015Q4	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Assets BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets	194129000	USD
CY2015Q4	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Current Liabilities Other BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesOther	12213000	USD
CY2015Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	-2576000	USD
CY2015Q4	bro	Business Acquisition Purchase Price Allocation Other Liabilities Assumed BusinessAcquisitionPurchasePriceAllocationOtherLiabilitiesAssumed	1565000	USD
CY2015Q4	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Liabilities BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities	11202000	USD
CY2015Q4	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Net BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet	182927000	USD
CY2015Q4	us-gaap	Goodwill Fair Value Disclosure GoodwillFairValueDisclosure	136400000	USD
CY2015Q4	us-gaap	Goodwill Fair Value Disclosure GoodwillFairValueDisclosure	136400000	USD
CY2015Q4	us-gaap	Business Acquisition Purchase Price Allocation Goodwill Expected Tax Deductible Amount BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductibleAmount	91100000	USD
CY2015Q4	bro	Business Acquisition Purchase Price Allocation Goodwill Non Deductible Amount BusinessAcquisitionPurchasePriceAllocationGoodwillNonDeductibleAmount	8400000	USD
CY2015Q4	bro	Earn Out Payable Not Deductible Until Earned Paid EarnOutPayableNotDeductibleUntilEarnedPaid	36900000	USD
CY2015	us-gaap	Business Combination Pro Forma Information Revenue Of Acquiree Since Acquisition Date Actual BusinessCombinationProFormaInformationRevenueOfAcquireeSinceAcquisitionDateActual	28200000	USD
CY2015	bro	Business Combination Pro Forma Information Income Loss Before Income Taxes Of Acquiree Since Acquisition Date Actual BusinessCombinationProFormaInformationIncomeLossBeforeIncomeTaxesOfAcquireeSinceAcquisitionDateActual	1500000	USD
CY2017Q4	bro	Maximum Future Contingencypayments Acquisitions MaximumFutureContingencypaymentsAcquisitions	88400000	USD
CY2016Q4	bro	Business Acquisition Earn Out Payables BusinessAcquisitionEarnOutPayables	63821000	USD
CY2015Q4	bro	Business Acquisition Earn Out Payables BusinessAcquisitionEarnOutPayables	78387000	USD
CY2014Q4	bro	Business Acquisition Earn Out Payables BusinessAcquisitionEarnOutPayables	75283000	USD
CY2017	bro	Additions To Estimated Acquisition Earn Out Payables AdditionsToEstimatedAcquisitionEarnOutPayables	6920000	USD
CY2016	bro	Additions To Estimated Acquisition Earn Out Payables AdditionsToEstimatedAcquisitionEarnOutPayables	4462000	USD
CY2015	bro	Additions To Estimated Acquisition Earn Out Payables AdditionsToEstimatedAcquisitionEarnOutPayables	36899000	USD
CY2017	bro	Payments For Estimated Acquisition Earn Out Payables PaymentsForEstimatedAcquisitionEarnOutPayables	-43766000	USD
CY2016	bro	Payments For Estimated Acquisition Earn Out Payables PaymentsForEstimatedAcquisitionEarnOutPayables	-28213000	USD
CY2015	bro	Payments For Estimated Acquisition Earn Out Payables PaymentsForEstimatedAcquisitionEarnOutPayables	-36798000	USD
CY2017	bro	Business Acquisition Earn Out Payable After Change In Additions And Payments BusinessAcquisitionEarnOutPayableAfterChangeInAdditionsAndPayments	26975000	USD
CY2016	bro	Business Acquisition Earn Out Payable After Change In Additions And Payments BusinessAcquisitionEarnOutPayableAfterChangeInAdditionsAndPayments	54636000	USD
CY2015	bro	Business Acquisition Earn Out Payable After Change In Additions And Payments BusinessAcquisitionEarnOutPayableAfterChangeInAdditionsAndPayments	75384000	USD
CY2017	bro	Change In Fair Value Estimated Acquisition Earn Out Payables ChangeInFairValueEstimatedAcquisitionEarnOutPayables	6874000	USD
CY2016	bro	Change In Fair Value Estimated Acquisition Earn Out Payables ChangeInFairValueEstimatedAcquisitionEarnOutPayables	6338000	USD
CY2015	bro	Change In Fair Value Estimated Acquisition Earn Out Payables ChangeInFairValueEstimatedAcquisitionEarnOutPayables	13000	USD
CY2017	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	2326000	USD
CY2016	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	2847000	USD
CY2015	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	2990000	USD
CY2017	bro	Change In Estimated Acquisition Earn Out Payable ChangeInEstimatedAcquisitionEarnOutPayable	9200000	USD
CY2016	bro	Change In Estimated Acquisition Earn Out Payable ChangeInEstimatedAcquisitionEarnOutPayable	9185000	USD
CY2015	bro	Change In Estimated Acquisition Earn Out Payable ChangeInEstimatedAcquisitionEarnOutPayable	3003000	USD
CY2017Q4	bro	Business Acquisition Earn Out Payables BusinessAcquisitionEarnOutPayables	36175000	USD
CY2016Q4	bro	Business Acquisition Earn Out Payables BusinessAcquisitionEarnOutPayables	63821000	USD
CY2015Q4	bro	Business Acquisition Earn Out Payables BusinessAcquisitionEarnOutPayables	78387000	USD
CY2017Q4	bro	Business Acquisition Earn Out Payables BusinessAcquisitionEarnOutPayables	36200000	USD
CY2016Q4	bro	Business Acquisition Earn Out Payables BusinessAcquisitionEarnOutPayables	63800000	USD
CY2015Q4	us-gaap	Goodwill Goodwill	2586683000	USD
CY2016	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	93376000	USD
CY2016	us-gaap	Goodwill Written Off Related To Sale Of Business Unit GoodwillWrittenOffRelatedToSaleOfBusinessUnit	4657000	USD
CY2016Q4	us-gaap	Goodwill Goodwill	2675402000	USD
CY2017	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	42172000	USD
CY2017	us-gaap	Goodwill Written Off Related To Sale Of Business Unit GoodwillWrittenOffRelatedToSaleOfBusinessUnit	1495000	USD
CY2017Q4	us-gaap	Goodwill Goodwill	2716079000	USD
CY2017Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	1494561000	USD
CY2017Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	853556000	USD
CY2017Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	641005000	USD
CY2016Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	1477348000	USD
CY2016Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	769894000	USD
CY2016Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	707454000	USD
CY2017Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	81000000.0	USD
CY2017Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	76500000	USD
CY2017Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	69100000	USD
CY2017Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	65900000	USD
CY2017Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	61400000	USD
CY2017Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	31042000	USD
CY2017Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	12000	USD
CY2017Q4	us-gaap	Available For Sale Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	206000	USD
CY2017Q4	us-gaap	Available For Sale Securities AvailableForSaleSecurities	30848000	USD
CY2017Q4	us-gaap	Time Deposits TimeDeposits	8100000	USD
CY2017Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	18319000	USD
CY2017Q4	bro	Available For Sale Securities Continuous Unrealized Loss Position Less Than12 Months Aggregate Losses Accumulated In Aoci AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAggregateLossesAccumulatedInAoci	157000	USD
CY2017Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	11845000	USD
CY2017Q4	bro	Available For Sale Securities Continuous Unrealized Loss Position12 Months Or Longer Aggregate Losses Accumulated In Aoci AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAggregateLossesAccumulatedInAoci	49000	USD
CY2017Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue	30164000	USD
CY2017Q4	bro	Availableforsale Securities Continuous Unrealized Loss Position Aggregate Losses Accumulated In Aoci AvailableforsaleSecuritiesContinuousUnrealizedLossPositionAggregateLossesAccumulatedInAoci	206000	USD
CY2017Q4	us-gaap	Availableforsale Securities In Unrealized Loss Positions Qualitative Disclosure Number Of Positions1 AvailableforsaleSecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions1	27	Securities
CY2016Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	28638000	USD
CY2016Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	24000	USD
CY2016Q4	us-gaap	Available For Sale Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	60000	USD
CY2016Q4	us-gaap	Available For Sale Securities AvailableForSaleSecurities	28602000	USD
CY2016Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	15664000	USD
CY2016Q4	bro	Available For Sale Securities Continuous Unrealized Loss Position Less Than12 Months Aggregate Losses Accumulated In Aoci AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAggregateLossesAccumulatedInAoci	60000	USD
CY2016Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	0	USD
CY2016Q4	bro	Available For Sale Securities Continuous Unrealized Loss Position12 Months Or Longer Aggregate Losses Accumulated In Aoci AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAggregateLossesAccumulatedInAoci	0	USD
CY2016Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue	15664000	USD
CY2016Q4	bro	Availableforsale Securities Continuous Unrealized Loss Position Aggregate Losses Accumulated In Aoci AvailableforsaleSecuritiesContinuousUnrealizedLossPositionAggregateLossesAccumulatedInAoci	60000	USD
CY2016Q4	us-gaap	Availableforsale Securities In Unrealized Loss Positions Qualitative Disclosure Number Of Positions1 AvailableforsaleSecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions1	20	Securities
CY2017Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost	16934000	USD
CY2017Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue	16899000	USD
CY2017Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost	13876000	USD
CY2017Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	13708000	USD
CY2017Q4	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost	232000	USD
CY2017Q4	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	241000	USD
CY2017Q4	us-gaap	Available For Sale Securities Debt Maturities Without Single Maturity Date Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateAmortizedCost	31042000	USD
CY2017Q4	us-gaap	Available For Sale Securities Debt Maturities Without Single Maturity Date Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateFairValue	30848000	USD
CY2016Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost	5551000	USD
CY2016Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue	5554000	USD
CY2016Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost	22757000	USD
CY2016Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	22708000	USD
CY2016Q4	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost	330000	USD
CY2016Q4	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	340000	USD
CY2016Q4	us-gaap	Available For Sale Securities Debt Maturities Without Single Maturity Date Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateAmortizedCost	28638000	USD
CY2016Q4	us-gaap	Available For Sale Securities Debt Maturities Without Single Maturity Date Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateFairValue	28602000	USD
CY2017	us-gaap	Proceeds From Sale And Maturity Of Available For Sale Securities ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities	5800000	USD
CY2017	us-gaap	Proceeds From Sale Maturity And Collections Of Investments ProceedsFromSaleMaturityAndCollectionsOfInvestments	9600000	USD
CY2016	us-gaap	Proceeds From Sale And Maturity Of Available For Sale Securities ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities	6000000.0	USD
CY2016Q4	us-gaap	Money Market Funds At Carrying Value MoneyMarketFundsAtCarryingValue	9100000	USD
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CY2016	us-gaap	Proceeds From Sale Of Short Term Investments ProceedsFromSaleOfShortTermInvestments	1700000	USD
CY2017Q4	us-gaap	Assets Held By Insurance Regulators AssetsHeldByInsuranceRegulators	4100000	USD
CY2017Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	233908000	USD
CY2016Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	214335000	USD
CY2017Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	156822000	USD
CY2016Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	138528000	USD
CY2017Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	77086000	USD
CY2016Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	75807000	USD
CY2017	us-gaap	Depreciation Depreciation	22700000	USD
CY2016	us-gaap	Depreciation Depreciation	21000000.0	USD
CY2015	us-gaap	Depreciation Depreciation	20900000	USD
CY2016Q4	us-gaap	Senior Notes SeniorNotes	598785000	USD
CY2017Q4	us-gaap	Line Of Credit LineOfCredit	365000000	USD
CY2017Q4	us-gaap	Accrued Bonuses Current AccruedBonusesCurrent	106923000	USD
CY2016Q4	us-gaap	Accrued Bonuses Current AccruedBonusesCurrent	82438000	USD
CY2017Q4	us-gaap	Accrued Employee Benefits Current AccruedEmployeeBenefitsCurrent	40540000	USD
CY2016Q4	us-gaap	Accrued Employee Benefits Current AccruedEmployeeBenefitsCurrent	45771000	USD
CY2017Q4	bro	Accrued Rentand Vendor Expenses AccruedRentandVendorExpenses	30616000	USD
CY2016Q4	bro	Accrued Rentand Vendor Expenses AccruedRentandVendorExpenses	28669000	USD
CY2017Q4	us-gaap	Deferred Revenue DeferredRevenue	21921000	USD
CY2016Q4	us-gaap	Deferred Revenue DeferredRevenue	17377000	USD
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CY2016Q4	bro	Reserveforpolicycancellations Reserveforpolicycancellations	9567000	USD
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CY2017Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	10951000	USD
CY2016Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	11726000	USD
CY2017Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	228748000	USD
CY2016Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	201989000	USD
CY2017	dei	Document Period End Date DocumentPeriodEndDate	2017-12-31
CY2017	dei	Document Period End Date DocumentPeriodEndDate	2017-12-31
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CY2017Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	120000000	USD
CY2016Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	55500000	USD
CY2017Q4	us-gaap	Senior Notes SeniorNotes	498943000	USD
CY2016Q4	us-gaap	Line Of Credit LineOfCredit	426250000	USD
CY2017Q4	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	7802000	USD
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CY2017Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	856141000	USD
CY2016Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	1018372000	USD
CY2017Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	120000000	USD
CY2016Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	55500000	USD
CY2017Q4	us-gaap	Long Term Debt LongTermDebt	976141000	USD
CY2016Q4	us-gaap	Long Term Debt LongTermDebt	1073872000	USD
CY2017	dei	Document Period End Date DocumentPeriodEndDate	2017-12-31
CY2014Q2	bro	Unsecured Revolving Credit Facility UnsecuredRevolvingCreditFacility	800000000.0	USD
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CY2017	us-gaap	Interest Paid InterestPaid	36200000	USD
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CY2017Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Next Twelve Months LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths	120000000.0	USD
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CY2017	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.350
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CY2017	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	129954000	USD
CY2016	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	126145000	USD
CY2015	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	118490000	USD
CY2017	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	21392000	USD
CY2016	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	21110000	USD
CY2015	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	17625000	USD
CY2017	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	929000	USD
CY2016	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	590000	USD
CY2015	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	430000	USD
CY2017	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	152275000	USD
CY2016	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	147845000	USD
CY2015	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	136545000	USD
CY2017	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	18999000	USD
CY2016	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	15551000	USD
CY2015	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	18416000	USD
CY2017	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	2984000	USD
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CY2015	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	4280000	USD
CY2017	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	0	USD
CY2016	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	0	USD
CY2015	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	0	USD
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CY2016	bro	Deferred Tax Provision DeferredTaxProvision	18163000	USD
CY2015	bro	Deferred Tax Provision DeferredTaxProvision	22696000	USD
CY2017	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	50092000	USD
CY2016	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	166008000	USD
CY2015	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	159241000	USD
CY2017	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.350
CY2016	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.350
CY2015	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.350
CY2017	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.038
CY2016	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.039
CY2015	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.039
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Share Based Compensation Cost EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost	0.003
CY2016	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Share Based Compensation Cost EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost	0.003
CY2015	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Share Based Compensation Cost EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost	0.003
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Meals And Entertainment EffectiveIncomeTaxRateReconciliationNondeductibleExpenseMealsAndEntertainment	0.003
CY2016	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Meals And Entertainment EffectiveIncomeTaxRateReconciliationNondeductibleExpenseMealsAndEntertainment	0.003
CY2015	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Meals And Entertainment EffectiveIncomeTaxRateReconciliationNondeductibleExpenseMealsAndEntertainment	0.003
CY2017Q4	bro	Tax Reform Act Deferred Tax Revaluationand Transition Tax Impact TaxReformActDeferredTaxRevaluationandTransitionTaxImpact	-0.269
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Other EffectiveIncomeTaxRateReconciliationNondeductibleExpenseOther	-0.014
CY2016	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Other EffectiveIncomeTaxRateReconciliationNondeductibleExpenseOther	-0.003
CY2015	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Other EffectiveIncomeTaxRateReconciliationNondeductibleExpenseOther	0.001
CY2017	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.111
CY2016	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.392
CY2015	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.396
CY2017Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssets	306351000	USD
CY2016Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssets	422478000	USD
CY2017Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	2723000	USD
CY2016Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	6425000	USD
CY2017Q4	bro	Net Unrealized Holding Gainon Availablefor Sale Securities NetUnrealizedHoldingGainonAvailableforSaleSecurities	-6000	USD
CY2016Q4	bro	Net Unrealized Holding Gainon Availablefor Sale Securities NetUnrealizedHoldingGainonAvailableforSaleSecurities	-12000	USD
CY2015Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	584000	USD
CY2015	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	302000	USD
CY2017Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	1694000	USD
CY2016Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	750000	USD
CY2017Q4	bro	Non Current Deferred Tax Liability NonCurrentDeferredTaxLiability	309068000	USD
CY2016Q4	bro	Non Current Deferred Tax Liability NonCurrentDeferredTaxLiability	428891000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Compensation DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation	36701000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Compensation DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation	44912000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals	7534000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals	14032000	USD
CY2017Q4	bro	Deferredprofitsharingcontingentcommissions Deferredprofitsharingcontingentcommissions	7107000	USD
CY2016Q4	bro	Deferredprofitsharingcontingentcommissions Deferredprofitsharingcontingentcommissions	10567000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	2434000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	2394000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	893000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	700000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Liabilities Net Noncurrent DeferredTaxAssetsLiabilitiesNetNoncurrent	52883000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Liabilities Net Noncurrent DeferredTaxAssetsLiabilitiesNetNoncurrent	71205000	USD
CY2017Q4	us-gaap	Deferred Tax Liabilities Noncurrent DeferredTaxLiabilitiesNoncurrent	256185000	USD
CY2016Q4	us-gaap	Deferred Tax Liabilities Noncurrent DeferredTaxLiabilitiesNoncurrent	357686000	USD
CY2017	us-gaap	Income Taxes Paid IncomeTaxesPaid	152000000.0	USD
CY2016	us-gaap	Income Taxes Paid IncomeTaxesPaid	143100000	USD
CY2015	us-gaap	Income Taxes Paid IncomeTaxesPaid	132900000	USD
CY2017	dei	Document Period End Date DocumentPeriodEndDate	2017-12-31
CY2017Q4	us-gaap	Operating Loss Carryforwards OperatingLossCarryforwards	100000	USD
CY2017Q4	bro	Operating Loss Carryforwards State OperatingLossCarryforwardsState	52200000	USD
CY2016Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	750000	USD
CY2015Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	584000	USD
CY2013Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	113000	USD
CY2017	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	1070000	USD
CY2016	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	412000	USD
CY2015	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	773000	USD
CY2017	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	0	USD
CY2016	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	41000	USD
CY2015	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	0	USD
CY2017	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	126000	USD
CY2016	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	205000	USD
CY2017	dei	Document Period End Date DocumentPeriodEndDate	2017-12-31
CY2017Q4	us-gaap	Liability For Uncertain Tax Positions Current LiabilityForUncertainTaxPositionsCurrent	228608	USD
CY2016Q4	us-gaap	Liability For Uncertain Tax Positions Current LiabilityForUncertainTaxPositionsCurrent	86191	USD
CY2015Q4	us-gaap	Liability For Uncertain Tax Positions Current LiabilityForUncertainTaxPositionsCurrent	102171	USD
CY2017Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	1700000	USD
CY2017	dei	Document Period End Date DocumentPeriodEndDate	2017-12-31
CY2016Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	750258	USD
CY2015Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	583977	USD
CY2017	dei	Document Period End Date DocumentPeriodEndDate	2017-12-31
CY2017	us-gaap	Deferred Tax Liability Not Recognized Determination Of Deferred Tax Liability Is Not Practicable Undistributed Earnings Of Foreign Subsidiaries DeferredTaxLiabilityNotRecognizedDeterminationOfDeferredTaxLiabilityIsNotPracticableUndistributedEarningsOfForeignSubsidiaries	As of December 31, 2017, the Company has estimated $20.9 million of cash and cash equivalent balances related to accumulated earnings associated with our international operations.
CY2017	bro	Service Period Eligibleto Participatefor Employee Savings Plan ServicePeriodEligibletoParticipateforEmployeeSavingsPlan	30	USD
CY2017	us-gaap	Defined Contribution Plan Employer Matching Contribution Percent Of Match DefinedContributionPlanEmployerMatchingContributionPercentOfMatch	0.040
CY2015	us-gaap	Defined Contribution Plan Employer Matching Contribution Percent Of Match DefinedContributionPlanEmployerMatchingContributionPercentOfMatch	0.025
CY2017	bro	Discretionary Profit Sharing Contribution Percentageof Employees Salary DiscretionaryProfitSharingContributionPercentageofEmployeesSalary	0.015
CY2017	us-gaap	Defined Benefit Plan Contributions By Employer DefinedBenefitPlanContributionsByEmployer	19600000	USD
CY2016	us-gaap	Defined Benefit Plan Contributions By Employer DefinedBenefitPlanContributionsByEmployer	19300000	USD
CY2015	us-gaap	Defined Benefit Plan Contributions By Employer DefinedBenefitPlanContributionsByEmployer	17800000	USD
CY2017Q4	bro	Maximum Number Of Shares Available To Be Granted Under Award Stock Plan MaximumNumberOfSharesAvailableToBeGrantedUnderAwardStockPlan	14400000	shares
CY2017Q4	bro	Incremental Increases In Average Stock Price From Initial Grant Price IncrementalIncreasesInAverageStockPriceFromInitialGrantPrice	0.20
CY2017	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Award Requisite Service Period1 ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardRequisiteServicePeriod1	P15Y
CY2009Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Award Requisite Service Period1 ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardRequisiteServicePeriod1	P20Y
CY2017	bro	Attainment Age Of Stock Plan AttainmentAgeOfStockPlan	attainment of age 64
CY2017	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	5156954	shares
CY2017Q4	bro	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Awarded Shares Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAwardedSharesOutstandingNumber	847238	shares
CY2017Q4	bro	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Distributed Shares Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsDistributedSharesOutstandingNumber	4309716	shares
CY2017	us-gaap	Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Lower Range Limit ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit	15.58
CY2017	us-gaap	Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Upper Range Limit ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit	25.68
CY2017	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Total Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue	6300000	USD
CY2016	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Total Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue	18100000	USD
CY2015	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Total Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue	6800000	USD
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Maximum Employee Subscription Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumEmployeeSubscriptionRate	0.10
CY2014Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	470356	shares
CY2014Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	18.57
CY2014	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P3Y1M6D
CY2014Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	5087000	USD
CY2015	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod	0	shares
CY2015	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	0
CY2015	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	151767	shares
CY2015	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	18.48
CY2015	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod	49000	shares
CY2015	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Forfeitures In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice	19.36
CY2015	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Expirations In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationsInPeriod	0	shares
CY2015	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Expirations In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExpirationsInPeriodWeightedAverageExercisePrice	0
CY2015Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	269589	shares
CY2015Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	18.48
CY2015	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P2Y2M12D
CY2015Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	2395000	USD
CY2016	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod	0	shares
CY2016	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	0
CY2016	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	64589	shares
CY2016	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	18.48
CY2016	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod	30000	shares
CY2016	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Forfeitures In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice	18.48
CY2016	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Expirations In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationsInPeriod	0	shares
CY2016	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Expirations In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExpirationsInPeriodWeightedAverageExercisePrice	0
CY2016Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	175000	shares
CY2016Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	18.48
CY2016	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P1Y2M12D
CY2016Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	4616000	USD
CY2017	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod	0	shares
CY2017	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	0
CY2017	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	175000	shares
CY2017	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	18.48
CY2017	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod	0	shares
CY2017	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Forfeitures In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice	0
CY2017	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Expirations In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationsInPeriod	0	shares
CY2017	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Expirations In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExpirationsInPeriodWeightedAverageExercisePrice	0
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	0	shares
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	0
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	0	USD
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber	0	shares
CY2016Q3	us-gaap	Net Income Loss NetIncomeLoss	71545000	USD
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice	0
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Outstanding Aggregate Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue	0	USD
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	0	shares
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	0
CY2017Q4	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Intrinsic Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1	0	USD
CY2016Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	175000	shares
CY2016Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	18.48
CY2016	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1	P1Y2M12D
CY2016Q4	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Intrinsic Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1	4616000	USD
CY2015Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	164589	shares
CY2015Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	18.48
CY2015	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1	P2Y2M12D
CY2015Q4	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Intrinsic Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1	2241000	USD
CY2017	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	4700000	USD
CY2016	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	1000000.0	USD
CY2015	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	2200000	USD
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Available For Grant ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant	0	shares
CY2017	us-gaap	Share Based Compensation ShareBasedCompensation	30631000	USD
CY2016	us-gaap	Share Based Compensation ShareBasedCompensation	16052000	USD
CY2015	us-gaap	Share Based Compensation ShareBasedCompensation	15513000	USD
CY2017Q4	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	87900000	USD
CY2017	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1 EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1	P3Y7M13D
CY2017	us-gaap	Interest Paid InterestPaid	36172000	USD
CY2016	us-gaap	Interest Paid InterestPaid	37652000	USD
CY2015	us-gaap	Interest Paid InterestPaid	37542000	USD
CY2017	us-gaap	Income Taxes Paid IncomeTaxesPaid	152024000	USD
CY2016	us-gaap	Income Taxes Paid IncomeTaxesPaid	143111000	USD
CY2015	us-gaap	Income Taxes Paid IncomeTaxesPaid	132874000	USD
CY2017Q4	bro	Other Payables OtherPayables	11708000	USD
CY2016Q4	bro	Other Payables OtherPayables	10664000	USD
CY2015Q4	bro	Other Payables OtherPayables	10029000	USD
CY2017	bro	Recorded Earn Out Payable RecordedEarnOutPayable	6921000	USD
CY2016	bro	Recorded Earn Out Payable RecordedEarnOutPayable	4463000	USD
CY2015	bro	Recorded Earn Out Payable RecordedEarnOutPayable	36899000	USD
CY2017	us-gaap	Notes Assumed1 NotesAssumed1	0	USD
CY2016	us-gaap	Notes Assumed1 NotesAssumed1	492000	USD
CY2015	us-gaap	Notes Assumed1 NotesAssumed1	0	USD
CY2017	bro	Notes Receivable On Sale Of Fixed Assets And Customer Accounts NotesReceivableOnSaleOfFixedAssetsAndCustomerAccounts	0	USD
CY2016	bro	Notes Receivable On Sale Of Fixed Assets And Customer Accounts NotesReceivableOnSaleOfFixedAssetsAndCustomerAccounts	22000	USD
CY2015	bro	Notes Receivable On Sale Of Fixed Assets And Customer Accounts NotesReceivableOnSaleOfFixedAssetsAndCustomerAccounts	7755000	USD
CY2017Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	573383000	USD
CY2016Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	515646000	USD
CY2015Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	443420000	USD
CY2017Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	250705000	USD
CY2016Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	265637000	USD
CY2015Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	229753000	USD
CY2017Q4	us-gaap	Operating Leases Future Minimum Payments Due Current OperatingLeasesFutureMinimumPaymentsDueCurrent	42970000	USD
CY2017Q4	us-gaap	Operating Leases Future Minimum Payments Due In Two Years OperatingLeasesFutureMinimumPaymentsDueInTwoYears	39005000	USD
CY2017Q4	us-gaap	Operating Leases Future Minimum Payments Due In Three Years OperatingLeasesFutureMinimumPaymentsDueInThreeYears	34236000	USD
CY2017Q4	us-gaap	Operating Leases Future Minimum Payments Due In Four Years OperatingLeasesFutureMinimumPaymentsDueInFourYears	27715000	USD
CY2017Q4	us-gaap	Operating Leases Future Minimum Payments Due In Five Years OperatingLeasesFutureMinimumPaymentsDueInFiveYears	21996000	USD
CY2017Q4	us-gaap	Operating Leases Future Minimum Payments Due Thereafter OperatingLeasesFutureMinimumPaymentsDueThereafter	44496000	USD
CY2017Q4	us-gaap	Operating Leases Future Minimum Payments Due OperatingLeasesFutureMinimumPaymentsDue	210418000	USD
CY2017	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	51000000.0	USD
CY2016	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	49300000	USD
CY2015	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	46000000.0	USD
CY2017Q1	us-gaap	Revenues Revenues	465080000	USD
CY2017Q2	us-gaap	Revenues Revenues	466305000	USD
CY2017Q3	us-gaap	Revenues Revenues	475646000	USD
CY2017Q4	us-gaap	Revenues Revenues	474316000	USD
CY2017Q1	us-gaap	Operating Expenses OperatingExpenses	354113000	USD
CY2017Q2	us-gaap	Operating Expenses OperatingExpenses	358303000	USD
CY2017Q3	us-gaap	Operating Expenses OperatingExpenses	351227000	USD
CY2017Q4	us-gaap	Operating Expenses OperatingExpenses	367982000	USD
CY2017Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	110967000	USD
CY2017Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	108002000	USD
CY2017Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	124419000	USD
CY2017Q4	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	106334000	USD
CY2017Q1	us-gaap	Net Income Loss NetIncomeLoss	70110000	USD
CY2017Q2	us-gaap	Net Income Loss NetIncomeLoss	66102000	USD
CY2017Q3	us-gaap	Net Income Loss NetIncomeLoss	75913000	USD
CY2017Q4	us-gaap	Net Income Loss NetIncomeLoss	187505000	USD
CY2017Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.0050
CY2017Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.0047
CY2017Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.0054
CY2017Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.0135
CY2017Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.0049
CY2017Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.0046
CY2017Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.0053
CY2017Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.0132
CY2016Q1	us-gaap	Revenues Revenues	424173000	USD
CY2016Q2	us-gaap	Revenues Revenues	446518000	USD
CY2016Q3	us-gaap	Revenues Revenues	462274000	USD
CY2016Q4	us-gaap	Revenues Revenues	433664000	USD
CY2016Q1	us-gaap	Operating Expenses OperatingExpenses	321624000	USD
CY2016Q2	us-gaap	Operating Expenses OperatingExpenses	337441000	USD
CY2016Q3	us-gaap	Operating Expenses OperatingExpenses	345302000	USD
CY2016Q4	us-gaap	Operating Expenses OperatingExpenses	338763000	USD
CY2016Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	102549000	USD
CY2016Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	109077000	USD
CY2016Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	116972000	USD
CY2016Q4	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	94901000	USD
CY2016Q1	us-gaap	Net Income Loss NetIncomeLoss	62070000	USD
CY2016Q4	us-gaap	Net Income Loss NetIncomeLoss	57626000	USD
CY2016Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.0045
CY2016Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.0047
CY2016Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.0051
CY2016Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.0041
CY2016Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.0044
CY2016Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.0047
CY2016Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.0050
CY2016Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.0041
CY2017	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	4	Segment
CY2017	us-gaap	Revenues Revenues	1881347000	USD
CY2017	us-gaap	Investment Income Nonoperating InvestmentIncomeNonoperating	1626000	USD
CY2017	us-gaap	Adjustment For Amortization AdjustmentForAmortization	85446000	USD
CY2017	us-gaap	Depreciation Depreciation	22698000	USD
CY2017	us-gaap	Interest Expense InterestExpense	38316000	USD
CY2017	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	449722000	USD
CY2017Q4	us-gaap	Assets Assets	5747550000	USD
CY2017	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	24192000	USD
CY2016	us-gaap	Revenues Revenues	1766629000	USD
CY2016	us-gaap	Investment Income Nonoperating InvestmentIncomeNonoperating	1456000	USD
CY2016	us-gaap	Adjustment For Amortization AdjustmentForAmortization	86663000	USD
CY2016	us-gaap	Depreciation Depreciation	21003000	USD
CY2016	us-gaap	Interest Expense InterestExpense	39481000	USD
CY2016	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	423499000	USD
CY2016Q4	us-gaap	Assets Assets	5262734000	USD
CY2016	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	17765000	USD
CY2015	us-gaap	Revenues Revenues	1660509000	USD
CY2015	us-gaap	Investment Income Nonoperating InvestmentIncomeNonoperating	1004000	USD
CY2015	us-gaap	Adjustment For Amortization AdjustmentForAmortization	87421000	USD
CY2015	us-gaap	Depreciation Depreciation	20890000	USD
CY2015	us-gaap	Interest Expense InterestExpense	39248000	USD
CY2015	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	402559000	USD
CY2015Q4	us-gaap	Assets Assets	4979844000	USD
CY2015	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	18375000	USD
CY2017	us-gaap	Direct Premiums Written DirectPremiumsWritten	604623000	USD
CY2017	us-gaap	Direct Premiums Earned DirectPremiumsEarned	592267000	USD
CY2016	us-gaap	Direct Premiums Written DirectPremiumsWritten	591142000	USD
CY2016	us-gaap	Direct Premiums Earned DirectPremiumsEarned	592123000	USD
CY2017	us-gaap	Assumed Premiums Written AssumedPremiumsWritten	0	USD
CY2017	us-gaap	Assumed Premiums Earned AssumedPremiumsEarned	0	USD
CY2016	us-gaap	Assumed Premiums Written AssumedPremiumsWritten	0	USD
CY2016	us-gaap	Assumed Premiums Earned AssumedPremiumsEarned	0	USD
CY2017	us-gaap	Ceded Premiums Written CededPremiumsWritten	604610000	USD
CY2017	us-gaap	Ceded Premiums Earned CededPremiumsEarned	592254000	USD
CY2016	us-gaap	Ceded Premiums Written CededPremiumsWritten	591124000	USD
CY2016	us-gaap	Ceded Premiums Earned CededPremiumsEarned	592105000	USD
CY2017	us-gaap	Premiums Written Net PremiumsWrittenNet	13000	USD
CY2017	us-gaap	Premiums Earned Net PremiumsEarnedNet	13000	USD
CY2016	us-gaap	Premiums Written Net PremiumsWrittenNet	18000	USD
CY2016	us-gaap	Premiums Earned Net PremiumsEarnedNet	18000	USD
CY2017	dei	Document Period End Date DocumentPeriodEndDate	2017-12-31
CY2017	dei	Document Period End Date DocumentPeriodEndDate	2017-12-31
CY2017	dei	Document Period End Date DocumentPeriodEndDate	2017-12-31
CY2017	us-gaap	Increase Decrease In Liability For Claims And Claims Adjustment Expense Reserve IncreaseDecreaseInLiabilityForClaimsAndClaimsAdjustmentExpenseReserve	1100000	USD
CY2017Q4	bro	Percentage Of Ceded Premiums PercentageOfCededPremiums	1
CY2017	dei	Document Period End Date DocumentPeriodEndDate	2017-12-31
CY2017	dei	Document Period End Date DocumentPeriodEndDate	2017-12-31
CY2017Q4	us-gaap	Reinsurance Recoverables On Unpaid Losses Gross ReinsuranceRecoverablesOnUnpaidLossesGross	477800000	USD
CY2017Q4	us-gaap	Prepaid Reinsurance Premiums PrepaidReinsurancePremiums	321000000.0	USD
CY2016Q4	us-gaap	Reinsurance Recoverables On Unpaid Losses Gross ReinsuranceRecoverablesOnUnpaidLossesGross	78100000	USD
CY2016Q4	us-gaap	Prepaid Reinsurance Premiums PrepaidReinsurancePremiums	308700000	USD
CY2017	us-gaap	Increase Decrease In Liability For Claims And Claims Adjustment Expense Reserve IncreaseDecreaseInLiabilityForClaimsAndClaimsAdjustmentExpenseReserve	1100000	USD
CY2017	dei	Document Period End Date DocumentPeriodEndDate	2017-12-31
CY2017Q4	bro	Percentage Of Ceded Premiums PercentageOfCededPremiums	1
CY2017	bro	Number Of Reinsurers NumberOfReinsurers	2	Reinsurer
CY2017Q4	bro	Reserve For Losses And Loss Adjustment Expenses For Reinsurance Liability ReserveForLossesAndLossAdjustmentExpensesForReinsuranceLiability	477800000	USD
CY2017	dei	Document Period End Date DocumentPeriodEndDate	2017-12-31
CY2016Q4	bro	Reserve For Losses And Loss Adjustment Expenses For Reinsurance Liability ReserveForLossesAndLossAdjustmentExpensesForReinsuranceLiability	78100000	USD
CY2017Q4	us-gaap	Stock Repurchase Program Remaining Authorized Repurchase Amount1 StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1	238700000	USD
	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	10700000	shares
	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	386300000	USD

Files In Submission

Name	View Source	Status
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$BRO
BROWN & BROWN, INC. Stock $bro

2016 Q4 Form 10-K Financial Statement

#000007928218000006 Filed on February 28, 2018

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$BRO BROWN & BROWN, INC. Stock $bro

2016 Q4 Form 10-K Financial Statement

#000007928218000006 Filed on February 28, 2018

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$BRO
BROWN & BROWN, INC. Stock $bro