$bku 2017 Q4 10-Q

Concept	2017 Q4	2017 Q3	2016 Q3
Revenue	$312.6M	$309.4M	$270.0M
YoY Change	12.48%	14.62%	20.58%
Cost Of Revenue
YoY Change
Gross Profit
YoY Change
Gross Profit Margin
Selling, General & Admin
YoY Change
% of Gross Profit
Research & Development		$3.452M	$3.746M
YoY Change		-7.85%	8.55%
% of Gross Profit
Depreciation & Amortization	$16.40M	$15.40M	$13.00M
YoY Change	-5.75%	18.46%	16.07%
% of Gross Profit
Operating Expenses		$3.452M	$3.746M
YoY Change		-7.85%	8.55%
Operating Profit
YoY Change
Interest Expense	$73.82M	$68.18M	$48.25M
YoY Change	46.27%	41.32%	38.05%
% of Operating Profit
Other Income/Expense, Net
YoY Change
Pretax Income	$118.9M	$100.0M	$74.40M
YoY Change	29.12%	34.45%	6.23%
Income Tax	-$298.9M	$32.25M	$23.55M
% Of Pretax Income	-251.32%	32.24%	31.65%
Net Earnings	$417.8M	$67.78M	$50.85M
YoY Change	560.08%	33.3%	-50.3%
Net Earnings / Revenue	133.63%	21.9%	18.83%
Basic Earnings Per Share	$3.80	$0.62	$0.47
Diluted Earnings Per Share	$3.79	$0.62	$0.47
COMMON SHARES
Basic Shares Outstanding	106.8M shares	105.7M shares	103.0M shares
Diluted Shares Outstanding		106.1M shares	103.6M shares

Concept	2017 Q4	2017 Q3	2016 Q3
OPERATING ACTIVITIES
Net Income	$417.8M	$67.78M	$50.85M
YoY Change	560.08%	33.3%	-50.3%
Depreciation, Depletion And Amortization	$16.40M	$15.40M	$13.00M
YoY Change	-5.75%	18.46%	16.07%
Cash From Operating Activities	$87.40M	$102.3M	$83.30M
YoY Change	7.64%	22.81%	-0.83%
INVESTING ACTIVITIES
Capital Expenditures	-$22.50M	-$24.90M	-$43.80M
YoY Change	-37.85%	-43.15%	-2.45%
Acquisitions
YoY Change
Other Investing Activities	-$645.4M	-$385.0M	-$1.025B
YoY Change	38.23%	-62.44%	10.47%
Cash From Investing Activities	-$667.9M	-$409.9M	-$1.069B
YoY Change	32.78%	-61.65%	9.87%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	482.3M	372.0M	887.7M
YoY Change	-20.7%	-58.09%	-11.26%
NET CHANGE
Cash From Operating Activities	87.40M	102.3M	83.30M
Cash From Investing Activities	-667.9M	-409.9M	-1.069B
Cash From Financing Activities	482.3M	372.0M	887.7M
Net Change In Cash	-98.20M	64.40M	-97.80M
YoY Change	-152.68%	-165.85%	-187.71%
FREE CASH FLOW
Cash From Operating Activities	$87.40M	$102.3M	$83.30M
Capital Expenditures	-$22.50M	-$24.90M	-$43.80M
Free Cash Flow	$109.9M	$127.2M	$127.1M
YoY Change	-6.39%	0.08%	-1.4%

Frame	Concept Type	Concept / XBRL Key	Value	Unit
	bku	Amortization Accretion Of Discounts And Premiums AmortizationAccretionOfDiscountsAndPremiums	90360000	USD
	bku	Amortization Accretion Of Discounts And Premiums AmortizationAccretionOfDiscountsAndPremiums	71111000	USD
	bku	Amountsreclassifiedfrom Aoc Iintoearningsasaresultofdiscontinuationofcashflowhedgesorearlyextinguishmentofdebt AmountsreclassifiedfromAOCIintoearningsasaresultofdiscontinuationofcashflowhedgesorearlyextinguishmentofdebt	0	USD
	bku	Amountsreclassifiedfrom Aoc Iintoearningsasaresultofdiscontinuationofcashflowhedgesorearlyextinguishmentofdebt AmountsreclassifiedfromAOCIintoearningsasaresultofdiscontinuationofcashflowhedgesorearlyextinguishmentofdebt	0	USD
CY2017Q3	bku	Availablefor Sale Securities Pledgedas Collateralfor Interest Rate Swaps AvailableforSaleSecuritiesPledgedasCollateralforInterestRateSwaps	40000000	USD
CY2017Q3	bku	Availableforsalesecurities Gross Unrealized Loss Considered Insignificantfor Otti Analysis AvailableforsalesecuritiesGrossUnrealizedLossConsideredInsignificantforOTTIAnalysis	237000	USD
CY2017Q3	bku	Branches Located In New York BranchesLocatedInNewYork	6	branch
	bku	Decrease Increase In Fdic Indemnification Asset Claims Filed Investing Activities DecreaseIncreaseInFDICIndemnificationAssetClaimsFiledInvestingActivities	30829000	USD
	bku	Decrease Increase In Fdic Indemnification Asset Claims Filed Investing Activities DecreaseIncreaseInFDICIndemnificationAssetClaimsFiledInvestingActivities	16768000	USD
CY2016Q4	bku	Derivative Asset Liability Collateral Offset DerivativeAssetLiabilityCollateralOffset	0	USD
CY2017Q3	bku	Derivative Asset Liability Collateral Offset DerivativeAssetLiabilityCollateralOffset	0	USD
CY2016Q4	bku	Derivative Asset Liability Fair Value Amount Not Offset Against Collateral DerivativeAssetLiabilityFairValueAmountNotOffsetAgainstCollateral	-21513000	USD
CY2017Q3	bku	Derivative Asset Liability Fair Value Amount Not Offset Against Collateral DerivativeAssetLiabilityFairValueAmountNotOffsetAgainstCollateral	-9884000	USD
CY2016Q4	bku	Derivative Asset Liability Fair Value Gross Liability Asset DerivativeAssetLiabilityFairValueGrossLiabilityAsset	0	USD
CY2017Q3	bku	Derivative Asset Liability Fair Value Gross Liability Asset DerivativeAssetLiabilityFairValueGrossLiabilityAsset	0	USD
CY2016Q4	bku	Derivative Asset Liability Fair Value Of Collateral DerivativeAssetLiabilityFairValueOfCollateral	-23796000	USD
CY2017Q3	bku	Derivative Asset Liability Fair Value Of Collateral DerivativeAssetLiabilityFairValueOfCollateral	-10217000	USD
	bku	Discontinuation Cash Flow Hedge Notional Amount DiscontinuationCashFlowHedgeNotionalAmount	0	USD
	bku	Discontinuation Cash Flow Hedge Notional Amount DiscontinuationCashFlowHedgeNotionalAmount	0	USD
CY2017Q3	bku	Dividend Equivalent Rights DividendEquivalentRights	3023314	shares
	bku	Dividends Declared And Payable DividendsDeclaredAndPayable	22482000	USD
	bku	Dividends Declared And Payable DividendsDeclaredAndPayable	23045000	USD
CY2016Q4	bku	Due From Federal Reserve Bank DueFromFederalReserveBank	372640000	USD
CY2017Q3	bku	Due From Federal Reserve Bank DueFromFederalReserveBank	254004000	USD
	bku	Effective Duration Of Investment Portfolio EffectiveDurationOfInvestmentPortfolio	P1Y8M5D
CY2015Q4	bku	Fdic Indemnification Assetand Liabilitynet FDICIndemnificationAssetandLiabilitynet	739843000	USD
CY2016Q4	bku	Fdic Indemnification Assetand Liabilitynet FDICIndemnificationAssetandLiabilitynet	515910000	USD
CY2017Q3	bku	Fdic Indemnification Assetand Liabilitynet FDICIndemnificationAssetandLiabilitynet	349617000	USD
CY2016Q4	bku	Fdic Indemnification Liability FDICIndemnificationLiability	23000	USD
CY2017Q3	bku	Fdic Indemnification Liability FDICIndemnificationLiability	0	USD
	bku	Fair Value Assets Level Transfers Amount FairValueAssetsLevelTransfersAmount	0	USD
	bku	Fair Value Assets Level Transfers Amount FairValueAssetsLevelTransfersAmount	0	USD
CY2017Q3	bku	Fair Value Inputs Averagefarepertrip Taxi Medallion FairValueInputsAveragefarepertripTaxiMedallion	16.12	USD
CY2017Q3	bku	Fair Value Inputs Days Workedper Month Taxi Medallion FairValueInputsDaysWorkedperMonthTaxiMedallion	25.6
CY2017Q3	bku	Fair Value Inputs Numberoftripspershift Taxi Medallion FairValueInputsNumberoftripspershiftTaxiMedallion	15.4
CY2017Q3	bku	Fair Value Inputs Second Shift Rental Achievement Rate Taxi Medallion FairValueInputsSecondShiftRentalAchievementRateTaxiMedallion	0.546
CY2016Q3	bku	Gain Loss On Indemnification Asset GainLossOnIndemnificationAsset	993000	USD
	bku	Gain Loss On Indemnification Asset GainLossOnIndemnificationAsset	-9410000	USD
CY2016	bku	Gain Loss On Indemnification Asset GainLossOnIndemnificationAsset	-17759000	USD
CY2017Q3	bku	Gain Loss On Indemnification Asset GainLossOnIndemnificationAsset	-4838000	USD
	bku	Gain Loss On Indemnification Asset GainLossOnIndemnificationAsset	-14174000	USD
CY2016Q3	bku	Gain Lossonindemnificationassetfromcoveredloanssold GainLossonindemnificationassetfromcoveredloanssold	8026000	USD
	bku	Gain Lossonindemnificationassetfromcoveredloanssold GainLossonindemnificationassetfromcoveredloanssold	11958000	USD
	bku	Gain Lossonindemnificationassetfromcoveredloanssold GainLossonindemnificationassetfromcoveredloanssold	1266000	USD
CY2016Q4	bku	Gross Amounts Recognized Derivative Assets And Liabilities GrossAmountsRecognizedDerivativeAssetsAndLiabilities	-21513000	USD
CY2017Q3	bku	Gross Amounts Recognized Derivative Assets And Liabilities GrossAmountsRecognizedDerivativeAssetsAndLiabilities	-9884000	USD
CY2016Q3	bku	Income Loss From Resolution Of Covered Assets IncomeLossFromResolutionOfCoveredAssets	8883000	USD
	bku	Income Loss From Resolution Of Covered Assets IncomeLossFromResolutionOfCoveredAssets	26426000	USD
CY2017Q3	bku	Income Loss From Resolution Of Covered Assets IncomeLossFromResolutionOfCoveredAssets	6400000	USD
	bku	Income Loss From Resolution Of Covered Assets IncomeLossFromResolutionOfCoveredAssets	22066000	USD
CY2017Q3	bku	Interestratederivativecontractscentrallyclearedthroughthe Cme InterestratederivativecontractscentrallyclearedthroughtheCME	0	USD
CY2016Q4	bku	Loans And Leases Receivable Allowance Covered And Not Covered LoansAndLeasesReceivableAllowanceCoveredAndNotCovered	152953000	USD
CY2017Q3	bku	Loans And Leases Receivable Allowance Covered And Not Covered LoansAndLeasesReceivableAllowanceCoveredAndNotCovered	158573000	USD
CY2016Q4	bku	Loans And Leases Receivable Deferred Income Covered And Not Covered LoansAndLeasesReceivableDeferredIncomeCoveredAndNotCovered	-42137000	USD
CY2017Q3	bku	Loans And Leases Receivable Deferred Income Covered And Not Covered LoansAndLeasesReceivableDeferredIncomeCoveredAndNotCovered	-40105000	USD
CY2016Q4	bku	Loans And Leases Receivable Net Of Deferred Income Covered LoansAndLeasesReceivableNetOfDeferredIncomeCovered	614042000	USD
CY2017Q3	bku	Loans And Leases Receivable Net Of Deferred Income Covered LoansAndLeasesReceivableNetOfDeferredIncomeCovered	537976000	USD
CY2016Q4	bku	Loans And Leases Receivable Net Of Deferred Income Covered And Not Covered LoansAndLeasesReceivableNetOfDeferredIncomeCoveredAndNotCovered	19395394000	USD
CY2017Q3	bku	Loans And Leases Receivable Net Of Deferred Income Covered And Not Covered LoansAndLeasesReceivableNetOfDeferredIncomeCoveredAndNotCovered	20610430000	USD
CY2016Q4	bku	Loansand Leases Receivable Gross Coveredand Non Covered LoansandLeasesReceivableGrossCoveredandNonCovered	19353257000	USD
CY2017Q3	bku	Loansand Leases Receivable Gross Coveredand Non Covered LoansandLeasesReceivableGrossCoveredandNonCovered	20570325000	USD
CY2009Q2	bku	Maximum Amount Fdic Will Reimburse MaximumAmountFDICWillReimburse	4000000000	USD
CY2017Q3	bku	Number Of Branches NumberOfBranches	90	branch
CY2017Q3	bku	Number Of Geographic Areas Branches Located In NumberOfGeographicAreasBranchesLocatedIn	15	county
CY2016Q4	bku	Number Of Held To Maturity Securities NumberOfHeldToMaturitySecurities	1	security
CY2017Q3	bku	Number Of Held To Maturity Securities NumberOfHeldToMaturitySecurities	1	security
CY2009Q2	bku	Number Of Loss Sharing Agreements NumberOfLossSharingAgreements	2
CY2017Q3	bku	Number Of Securities Amount Of Impairment Insignificant NumberOfSecuritiesAmountOfImpairmentInsignificant	20	security
CY2016Q3	bku	Number Of Securities Determined To Be Other Than Temporarily Impaired During The Period NumberOfSecuritiesDeterminedToBeOtherThanTemporarilyImpairedDuringThePeriod	2	security
	bku	Number Of Securities Determined To Be Other Than Temporarily Impaired During The Period NumberOfSecuritiesDeterminedToBeOtherThanTemporarilyImpairedDuringThePeriod	2	security
CY2017Q3	bku	Number Of Securities Determined To Be Other Than Temporarily Impaired During The Period NumberOfSecuritiesDeterminedToBeOtherThanTemporarilyImpairedDuringThePeriod	0	security
	bku	Number Of Securities Determined To Be Other Than Temporarily Impaired During The Period NumberOfSecuritiesDeterminedToBeOtherThanTemporarilyImpairedDuringThePeriod	0	security
	bku	Number Of Subsidiaries NumberOfSubsidiaries	1	subsidiary
CY2009Q2	bku	Percent Fdic Will Reimburse For Losses PercentFDICWillReimburseForLosses	0.8
CY2009Q2	bku	Percent Of Losses In Excess Of Maximum Amount Fdic Will Reimburse PercentOfLossesInExcessOfMaximumAmountFDICWillReimburse	0.95
CY2016Q4	bku	Percent Of Total Loans PercentOfTotalLoans	1.000
CY2017Q3	bku	Percent Of Total Loans PercentOfTotalLoans	1.000
CY2016Q4	bku	Unpaid Principal Balance Of Aci Loans UnpaidPrincipalBalanceOfAciLoans	1500000000	USD
CY2017Q3	bku	Unpaid Principal Balance Of Aci Loans UnpaidPrincipalBalanceOfAciLoans	1200000000	USD
CY2017Q3	bku	Value Of Pledged Real Estate Loans With Unpaid Principal Balance ValueOfPledgedRealEstateLoansWithUnpaidPrincipalBalance	10500000000	USD
	bku	Weighted Average Life Of Investment Portfolio WeightedAverageLifeOfInvestmentPortfolio	P4Y10M24D
	dei	Amendment Flag AmendmentFlag	false
	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	Q3
	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2017
	dei	Document Period End Date DocumentPeriodEndDate	2017-09-30
	dei	Document Type DocumentType	10-Q
	dei	Entity Central Index Key EntityCentralIndexKey	0001504008
CY2017Q4	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	106820503	shares
	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
	dei	Entity Registrant Name EntityRegistrantName	BankUnited, Inc.
	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2016Q4	invest	Derivative Notional Amount DerivativeNotionalAmount	4217114000	USD
CY2017Q3	invest	Derivative Notional Amount DerivativeNotionalAmount	4339440000	USD
CY2015Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	22182000	USD
CY2016Q3	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	42530000	USD
CY2016Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	41247000	USD
CY2017Q3	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	52589000	USD
CY2016Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	1426459000	USD
CY2017Q3	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	1492790000	USD
	us-gaap	Adjustments To Additional Paid In Capital Tax Effect From Share Based Compensation AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation	847000	USD
CY2016Q4	us-gaap	Advances From Federal Home Loan Banks AdvancesFromFederalHomeLoanBanks	5239348000	USD
CY2017Q3	us-gaap	Advances From Federal Home Loan Banks AdvancesFromFederalHomeLoanBanks	4871000000	USD
CY2016Q3	us-gaap	Allowance For Loan And Lease Loss Recovery Of Bad Debts AllowanceForLoanAndLeaseLossRecoveryOfBadDebts	1212000	USD
	us-gaap	Allowance For Loan And Lease Loss Recovery Of Bad Debts AllowanceForLoanAndLeaseLossRecoveryOfBadDebts	3033000	USD
CY2017Q3	us-gaap	Allowance For Loan And Lease Loss Recovery Of Bad Debts AllowanceForLoanAndLeaseLossRecoveryOfBadDebts	1099000	USD
	us-gaap	Allowance For Loan And Lease Loss Recovery Of Bad Debts AllowanceForLoanAndLeaseLossRecoveryOfBadDebts	3136000	USD
CY2016Q3	us-gaap	Allowance For Loan And Lease Losses Write Offs AllowanceForLoanAndLeaseLossesWriteOffs	6862000	USD
	us-gaap	Allowance For Loan And Lease Losses Write Offs AllowanceForLoanAndLeaseLossesWriteOffs	16834000	USD
CY2017Q3	us-gaap	Allowance For Loan And Lease Losses Write Offs AllowanceForLoanAndLeaseLossesWriteOffs	36028000	USD
	us-gaap	Allowance For Loan And Lease Losses Write Offs AllowanceForLoanAndLeaseLossesWriteOffs	61089000	USD
CY2016Q4	us-gaap	Amortization Method Qualified Affordable Housing Project Investments AmortizationMethodQualifiedAffordableHousingProjectInvestments	71000000	USD
CY2017Q3	us-gaap	Amortization Method Qualified Affordable Housing Project Investments AmortizationMethodQualifiedAffordableHousingProjectInvestments	66000000	USD
CY2016Q4	us-gaap	Assets Assets	27880151000	USD
CY2017Q3	us-gaap	Assets Assets	29554831000	USD
CY2016Q4	us-gaap	Assets Fair Value Disclosure Recurring AssetsFairValueDisclosureRecurring	6150975000	USD
CY2017Q3	us-gaap	Assets Fair Value Disclosure Recurring AssetsFairValueDisclosureRecurring	6951942000	USD
CY2016Q4	us-gaap	Available For Sale Securities AvailableForSaleSecurities	6073584000	USD
CY2017Q3	us-gaap	Available For Sale Securities AvailableForSaleSecurities	6893472000	USD
CY2016Q4	us-gaap	Available For Sale Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	103806000	USD
CY2017Q3	us-gaap	Available For Sale Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	110304000	USD
CY2016Q4	us-gaap	Available For Sale Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	26425000	USD
CY2017Q3	us-gaap	Available For Sale Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	7858000	USD
CY2016Q4	us-gaap	Available For Sale Securities Amortized Cost AvailableForSaleSecuritiesAmortizedCost	5996203000	USD
CY2017Q3	us-gaap	Available For Sale Securities Amortized Cost AvailableForSaleSecuritiesAmortizedCost	6791026000	USD
CY2016Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	3673000	USD
CY2017Q3	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	431000	USD
CY2016Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue	1899556000	USD
CY2017Q3	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue	984789000	USD
CY2016Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	22752000	USD
CY2017Q3	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	7427000	USD
CY2016Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	1383990000	USD
CY2017Q3	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	936926000	USD
CY2016Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	515566000	USD
CY2017Q3	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	47863000	USD
CY2017Q3	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost	2252239000	USD
CY2017Q3	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	2282220000	USD
CY2017Q3	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost	3363698000	USD
CY2017Q3	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	3406609000	USD
CY2017Q3	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost	429387000	USD
CY2017Q3	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue	436893000	USD
CY2017Q3	us-gaap	Available For Sale Securities Debt Maturities Within One Year Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost	684986000	USD
CY2017Q3	us-gaap	Available For Sale Securities Debt Maturities Within One Year Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue	697034000	USD
CY2017Q3	us-gaap	Available For Sale Securities Debt Maturities Without Single Maturity Date Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateAmortizedCost	60716000	USD
CY2017Q3	us-gaap	Available For Sale Securities Debt Maturities Without Single Maturity Date Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateFairValue	70716000	USD
CY2016Q3	us-gaap	Available For Sale Securities Gross Realized Gain Loss Net AvailableForSaleSecuritiesGrossRealizedGainLossNet	3008000	USD
	us-gaap	Available For Sale Securities Gross Realized Gain Loss Net AvailableForSaleSecuritiesGrossRealizedGainLossNet	10065000	USD
CY2017Q3	us-gaap	Available For Sale Securities Gross Realized Gain Loss Net AvailableForSaleSecuritiesGrossRealizedGainLossNet	26931000	USD
	us-gaap	Available For Sale Securities Gross Realized Gain Loss Net AvailableForSaleSecuritiesGrossRealizedGainLossNet	29194000	USD
CY2016Q3	us-gaap	Available For Sale Securities Gross Realized Gains AvailableForSaleSecuritiesGrossRealizedGains	3471000	USD
	us-gaap	Available For Sale Securities Gross Realized Gains AvailableForSaleSecuritiesGrossRealizedGains	10528000	USD
CY2017Q3	us-gaap	Available For Sale Securities Gross Realized Gains AvailableForSaleSecuritiesGrossRealizedGains	28261000	USD
	us-gaap	Available For Sale Securities Gross Realized Gains AvailableForSaleSecuritiesGrossRealizedGains	30553000	USD
CY2016Q3	us-gaap	Available For Sale Securities Gross Realized Losses AvailableForSaleSecuritiesGrossRealizedLosses	0	USD
	us-gaap	Available For Sale Securities Gross Realized Losses AvailableForSaleSecuritiesGrossRealizedLosses	0	USD
CY2017Q3	us-gaap	Available For Sale Securities Gross Realized Losses AvailableForSaleSecuritiesGrossRealizedLosses	1330000	USD
	us-gaap	Available For Sale Securities Gross Realized Losses AvailableForSaleSecuritiesGrossRealizedLosses	1359000	USD
CY2016Q4	us-gaap	Available For Sale Securities Pledged As Collateral AvailableForSaleSecuritiesPledgedAsCollateral	1800000000	USD
CY2017Q3	us-gaap	Available For Sale Securities Pledged As Collateral AvailableForSaleSecuritiesPledgedAsCollateral	2500000000	USD
CY2016Q3	us-gaap	Availableforsale Securities Gross Realized Gain Loss Excluding Other Than Temporary Impairments AvailableforsaleSecuritiesGrossRealizedGainLossExcludingOtherThanTemporaryImpairments	3471000	USD
	us-gaap	Availableforsale Securities Gross Realized Gain Loss Excluding Other Than Temporary Impairments AvailableforsaleSecuritiesGrossRealizedGainLossExcludingOtherThanTemporaryImpairments	10528000	USD
CY2017Q3	us-gaap	Availableforsale Securities Gross Realized Gain Loss Excluding Other Than Temporary Impairments AvailableforsaleSecuritiesGrossRealizedGainLossExcludingOtherThanTemporaryImpairments	26931000	USD
	us-gaap	Availableforsale Securities Gross Realized Gain Loss Excluding Other Than Temporary Impairments AvailableforsaleSecuritiesGrossRealizedGainLossExcludingOtherThanTemporaryImpairments	29194000	USD
CY2017Q3	us-gaap	Availableforsale Securities In Unrealized Loss Positions Qualitative Disclosure Number Of Positions1 AvailableforsaleSecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions1	54	security
CY2016Q4	us-gaap	Bank Owned Life Insurance BankOwnedLifeInsurance	239736000	USD
CY2017Q3	us-gaap	Bank Owned Life Insurance BankOwnedLifeInsurance	248876000	USD
CY2015Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	267500000	USD
CY2016Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	261954000	USD
CY2016Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	448313000	USD
CY2017Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	292601000	USD
	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	-5546000	USD
	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	-155712000	USD
CY2016Q4	us-gaap	Cash And Due From Banks CashAndDueFromBanks	40260000	USD
CY2017Q3	us-gaap	Cash And Due From Banks CashAndDueFromBanks	34883000	USD
CY2016Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2017Q3	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2016Q3	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.21
	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.63
CY2017Q3	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.21
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CY2016Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2017Q3	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2016Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	400000000	shares
CY2017Q3	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	400000000	shares
CY2016Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	104166945	shares
CY2017Q3	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	106821902	shares
CY2016Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	104166945	shares
CY2017Q3	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	106821902	shares
CY2016Q4	us-gaap	Common Stock Value CommonStockValue	1042000	USD
CY2017Q3	us-gaap	Common Stock Value CommonStockValue	1068000	USD
CY2016Q3	us-gaap	Communications And Information Technology CommunicationsAndInformationTechnology	3746000	USD
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CY2017Q3	us-gaap	Communications And Information Technology CommunicationsAndInformationTechnology	3452000	USD
	us-gaap	Communications And Information Technology CommunicationsAndInformationTechnology	10481000	USD
CY2016Q3	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	59563000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	182795000	USD
CY2017Q3	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	61083000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	207821000	USD
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CY2016Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	62940000	USD
CY2017Q3	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	23910000	USD
CY2016Q4	us-gaap	Deposits Deposits	19490890000	USD
CY2017Q3	us-gaap	Deposits Deposits	21223244000	USD
CY2016Q4	us-gaap	Deposits Savings Deposits DepositsSavingsDeposits	9251593000	USD
CY2017Q3	us-gaap	Deposits Savings Deposits DepositsSavingsDeposits	9964242000	USD
	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	38971000	USD
	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	45204000	USD
CY2016Q4	us-gaap	Derivative Asset Collateral Obligation To Return Cash Offset DerivativeAssetCollateralObligationToReturnCashOffset	0	USD
CY2017Q3	us-gaap	Derivative Asset Collateral Obligation To Return Cash Offset DerivativeAssetCollateralObligationToReturnCashOffset	0	USD
CY2016Q4	us-gaap	Derivative Asset Fair Value Gross Liability DerivativeAssetFairValueGrossLiability	27485000	USD
CY2017Q3	us-gaap	Derivative Asset Fair Value Gross Liability DerivativeAssetFairValueGrossLiability	6814000	USD
CY2016Q4	us-gaap	Derivative Asset Fair Value Of Collateral DerivativeAssetFairValueOfCollateral	0	USD
CY2017Q3	us-gaap	Derivative Asset Fair Value Of Collateral DerivativeAssetFairValueOfCollateral	1539000	USD
CY2016Q4	us-gaap	Derivative Assets DerivativeAssets	2364000	USD
CY2017Q3	us-gaap	Derivative Assets DerivativeAssets	333000	USD
CY2016Q4	us-gaap	Derivative Assets Liabilities At Fair Value Net DerivativeAssetsLiabilitiesAtFairValueNet	2283000	USD
CY2017Q3	us-gaap	Derivative Assets Liabilities At Fair Value Net DerivativeAssetsLiabilitiesAtFairValueNet	333000	USD
CY2017Q3	us-gaap	Derivative Collateral Right To Reclaim Cash DerivativeCollateralRightToReclaimCash	2000000	USD
CY2016Q4	us-gaap	Derivative Fair Value Of Derivative Asset DerivativeFairValueOfDerivativeAsset	29849000	USD
CY2017Q3	us-gaap	Derivative Fair Value Of Derivative Asset DerivativeFairValueOfDerivativeAsset	8686000	USD
CY2016Q4	us-gaap	Derivative Fair Value Of Derivative Asset Amount Not Offset Against Collateral DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral	29849000	USD
CY2017Q3	us-gaap	Derivative Fair Value Of Derivative Asset Amount Not Offset Against Collateral DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral	8686000	USD
CY2016Q4	us-gaap	Derivative Fair Value Of Derivative Liability DerivativeFairValueOfDerivativeLiability	51362000	USD
CY2017Q3	us-gaap	Derivative Fair Value Of Derivative Liability DerivativeFairValueOfDerivativeLiability	18570000	USD
CY2016Q4	us-gaap	Derivative Fair Value Of Derivative Liability Amount Not Offset Against Collateral DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral	51362000	USD
CY2017Q3	us-gaap	Derivative Fair Value Of Derivative Liability Amount Not Offset Against Collateral DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral	18570000	USD
CY2016Q3	us-gaap	Derivative Instruments Loss Reclassified From Accumulated Oci Into Income Effective Portion DerivativeInstrumentsLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortion	3741000	USD
	us-gaap	Derivative Instruments Loss Reclassified From Accumulated Oci Into Income Effective Portion DerivativeInstrumentsLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortion	13050000	USD
CY2017Q3	us-gaap	Derivative Instruments Loss Reclassified From Accumulated Oci Into Income Effective Portion DerivativeInstrumentsLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortion	2001000	USD
	us-gaap	Derivative Instruments Loss Reclassified From Accumulated Oci Into Income Effective Portion DerivativeInstrumentsLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortion	7463000	USD
CY2016Q4	us-gaap	Derivative Liabilities DerivativeLiabilities	81000	USD
CY2017Q3	us-gaap	Derivative Liabilities DerivativeLiabilities	0	USD
CY2016Q4	us-gaap	Derivative Liability Collateral Right To Reclaim Cash Offset DerivativeLiabilityCollateralRightToReclaimCashOffset	0	USD
CY2017Q3	us-gaap	Derivative Liability Collateral Right To Reclaim Cash Offset DerivativeLiabilityCollateralRightToReclaimCashOffset	0	USD
CY2016Q4	us-gaap	Derivative Liability Fair Value Gross Asset DerivativeLiabilityFairValueGrossAsset	27485000	USD
CY2017Q3	us-gaap	Derivative Liability Fair Value Gross Asset DerivativeLiabilityFairValueGrossAsset	6814000	USD
CY2016Q4	us-gaap	Derivative Liability Fair Value Of Collateral DerivativeLiabilityFairValueOfCollateral	23796000	USD
CY2017Q3	us-gaap	Derivative Liability Fair Value Of Collateral DerivativeLiabilityFairValueOfCollateral	11756000	USD
	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	67444000	USD
	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	69118000	USD
CY2016Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.47
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.52
CY2017Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.62
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.79
CY2016Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.47
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.50
CY2017Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.62
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.79
CY2016Q3	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.317
	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.3324
CY2017Q3	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.322
	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.312
	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.35
CY2017Q3	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.35
	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.35
	us-gaap	Employee Service Share Based Compensation Tax Benefit From Exercise Of Stock Options EmployeeServiceShareBasedCompensationTaxBenefitFromExerciseOfStockOptions	3800000	USD
CY2016Q4	us-gaap	Fdic Indemnification Asset FDICIndemnificationAsset	515933000	USD
CY2017Q3	us-gaap	Fdic Indemnification Asset FDICIndemnificationAsset	349617000	USD
CY2016Q3	us-gaap	Fdic Indemnification Asset Accretion Of Discount FDICIndemnificationAssetAccretionOfDiscount	38957000	USD
	us-gaap	Fdic Indemnification Asset Accretion Of Discount FDICIndemnificationAssetAccretionOfDiscount	116711000	USD
CY2016	us-gaap	Fdic Indemnification Asset Accretion Of Discount FDICIndemnificationAssetAccretionOfDiscount	160091000	USD
CY2017Q3	us-gaap	Fdic Indemnification Asset Accretion Of Discount FDICIndemnificationAssetAccretionOfDiscount	45225000	USD
	us-gaap	Fdic Indemnification Asset Accretion Of Discount FDICIndemnificationAssetAccretionOfDiscount	135351000	USD
CY2016	us-gaap	Fdic Indemnification Asset Cash Payments Received FDICIndemnificationAssetCashPaymentsReceived	46083000	USD
	us-gaap	Fdic Indemnification Asset Cash Payments Received FDICIndemnificationAssetCashPaymentsReceived	16768000	USD
CY2016Q3	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	4943000	USD
	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	12866000	USD
CY2017Q3	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	5764000	USD
	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	16827000	USD
CY2016Q4	us-gaap	Federal Home Loan Bank Stock And Federal Reserve Bank Stock FederalHomeLoanBankStockAndFederalReserveBankStock	284272000	USD
CY2017Q3	us-gaap	Federal Home Loan Bank Stock And Federal Reserve Bank Stock FederalHomeLoanBankStockAndFederalReserveBankStock	270239000	USD
CY2016Q3	us-gaap	Fees And Commissions FeesAndCommissions	5171000	USD
	us-gaap	Fees And Commissions FeesAndCommissions	14529000	USD
CY2017Q3	us-gaap	Fees And Commissions FeesAndCommissions	4938000	USD
	us-gaap	Fees And Commissions FeesAndCommissions	15554000	USD
	us-gaap	Fees And Commissions Depositor Accounts FeesAndCommissionsDepositorAccounts	9800000	USD
CY2015Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	125828000	USD
CY2016Q2	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	135718000	USD
CY2016Q3	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	154476000	USD
CY2016Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	152953000	USD
CY2017Q2	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	155648000	USD
CY2017Q3	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	158573000	USD
CY2016Q3	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	26
	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	75
CY2017Q3	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	16
	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	119
CY2016Q3	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	36424000	USD
	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	92028000	USD
CY2017Q3	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	6417000	USD
	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	92624000	USD
CY2016Q3	us-gaap	Financing Receivable Modifications Subsequent Default Number Of Contracts1 FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1	9
	us-gaap	Financing Receivable Modifications Subsequent Default Number Of Contracts1 FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1	9
CY2017Q3	us-gaap	Financing Receivable Modifications Subsequent Default Number Of Contracts1 FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1	8
	us-gaap	Financing Receivable Modifications Subsequent Default Number Of Contracts1 FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1	10
CY2016Q3	us-gaap	Financing Receivable Modifications Subsequent Default Recorded Investment1 FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1	7604000	USD
	us-gaap	Financing Receivable Modifications Subsequent Default Recorded Investment1 FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1	7604000	USD
CY2017Q3	us-gaap	Financing Receivable Modifications Subsequent Default Recorded Investment1 FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1	2374000	USD
	us-gaap	Financing Receivable Modifications Subsequent Default Recorded Investment1 FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1	3778000	USD
CY2016Q4	us-gaap	Financing Receivable Recorded Investment Current FinancingReceivableRecordedInvestmentCurrent	18699976000	USD
CY2017Q3	us-gaap	Financing Receivable Recorded Investment Current FinancingReceivableRecordedInvestmentCurrent	20027206000	USD
CY2016Q4	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	131145000	USD
CY2017Q3	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	199611000	USD
	us-gaap	Gain Loss On Investments GainLossOnInvestments	10065000	USD
	us-gaap	Gain Loss On Investments GainLossOnInvestments	29194000	USD
CY2016Q3	us-gaap	Gain Loss On Sale Of Loans And Leases GainLossOnSaleOfLoansAndLeases	-7947000	USD
	us-gaap	Gain Loss On Sale Of Loans And Leases GainLossOnSaleOfLoansAndLeases	-7360000	USD
CY2017Q3	us-gaap	Gain Loss On Sale Of Loans And Leases GainLossOnSaleOfLoansAndLeases	2447000	USD
	us-gaap	Gain Loss On Sale Of Loans And Leases GainLossOnSaleOfLoansAndLeases	6601000	USD
CY2016Q4	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	10000000	USD
CY2017Q3	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	10000000	USD
CY2016Q3	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	138507000	USD
	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	99633000	USD
CY2017Q3	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	221657000	USD
	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	206900000	USD
CY2017Q3	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	2900000	USD
	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	8300000	USD
CY2016Q4	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	178828000	USD
CY2017Q3	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	211275000	USD
CY2016Q4	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	19241000	USD
CY2017Q3	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	23973000	USD
CY2016Q4	us-gaap	Impaired Financing Receivable Unpaid Principal Balance ImpairedFinancingReceivableUnpaidPrincipalBalance	178707000	USD
CY2017Q3	us-gaap	Impaired Financing Receivable Unpaid Principal Balance ImpairedFinancingReceivableUnpaidPrincipalBalance	211580000	USD
CY2016Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	74398000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	243343000	USD
CY2017Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	100031000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	285539000	USD
CY2016Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	23550000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	80896000	USD
CY2017Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	32252000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	89060000	USD
	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	8168000	USD
	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	46320000	USD
	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	1897808000	USD
	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	1732354000	USD
	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	9502000	USD
	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-15743000	USD
	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	44708000	USD
	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-33546000	USD
CY2016Q4	us-gaap	Intangible Assets Net Including Goodwill IntangibleAssetsNetIncludingGoodwill	78047000	USD
CY2017Q3	us-gaap	Intangible Assets Net Including Goodwill IntangibleAssetsNetIncludingGoodwill	77857000	USD
CY2016Q3	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	269981000	USD
	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	781252000	USD
CY2017Q3	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	309443000	USD
	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	891816000	USD
CY2016Q3	us-gaap	Interest And Dividend Income Securities Available For Sale InterestAndDividendIncomeSecuritiesAvailableForSale	39712000	USD
	us-gaap	Interest And Dividend Income Securities Available For Sale InterestAndDividendIncomeSecuritiesAvailableForSale	109963000	USD
CY2017Q3	us-gaap	Interest And Dividend Income Securities Available For Sale InterestAndDividendIncomeSecuritiesAvailableForSale	51851000	USD
	us-gaap	Interest And Dividend Income Securities Available For Sale InterestAndDividendIncomeSecuritiesAvailableForSale	141624000	USD
CY2016Q3	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	227233000	USD
	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	662439000	USD
CY2017Q3	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	253815000	USD
	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	739586000	USD
CY2016Q4	us-gaap	Interest Bearing Deposits In Banks InterestBearingDepositsInBanks	35413000	USD
CY2017Q3	us-gaap	Interest Bearing Deposits In Banks InterestBearingDepositsInBanks	3714000	USD
CY2016Q4	us-gaap	Interest Bearing Domestic Deposit Demand InterestBearingDomesticDepositDemand	1523064000	USD
CY2017Q3	us-gaap	Interest Bearing Domestic Deposit Demand InterestBearingDomesticDepositDemand	1828809000	USD
CY2016Q3	us-gaap	Interest Expense InterestExpense	48246000	USD
	us-gaap	Interest Expense InterestExpense	138366000	USD
CY2017Q3	us-gaap	Interest Expense InterestExpense	68179000	USD
	us-gaap	Interest Expense InterestExpense	180370000	USD
CY2016Q3	us-gaap	Interest Expense Borrowings InterestExpenseBorrowings	17278000	USD
	us-gaap	Interest Expense Borrowings InterestExpenseBorrowings	51939000	USD
CY2017Q3	us-gaap	Interest Expense Borrowings InterestExpenseBorrowings	22260000	USD
	us-gaap	Interest Expense Borrowings InterestExpenseBorrowings	60209000	USD
CY2016Q3	us-gaap	Interest Expense Deposits InterestExpenseDeposits	30968000	USD
	us-gaap	Interest Expense Deposits InterestExpenseDeposits	86427000	USD
CY2017Q3	us-gaap	Interest Expense Deposits InterestExpenseDeposits	45919000	USD
	us-gaap	Interest Expense Deposits InterestExpenseDeposits	120161000	USD
CY2016Q3	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	197327000	USD
	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	600437000	USD
CY2017Q3	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	203410000	USD
	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	647873000	USD
CY2016Q3	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	221735000	USD
	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	642886000	USD
CY2017Q3	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	241264000	USD
	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	711446000	USD
	us-gaap	Interest Paid Net InterestPaidNet	132398000	USD
	us-gaap	Interest Paid Net InterestPaidNet	169759000	USD
CY2017Q3	us-gaap	Interest Rate Cash Flow Hedge Gain Loss To Be Reclassified During Next12 Months Net InterestRateCashFlowHedgeGainLossToBeReclassifiedDuringNext12MonthsNet	6200000	USD
CY2016Q4	us-gaap	Interest Rate Derivative Assets At Fair Value InterestRateDerivativeAssetsAtFairValue	50232000	USD
CY2017Q3	us-gaap	Interest Rate Derivative Assets At Fair Value InterestRateDerivativeAssetsAtFairValue	28334000	USD
CY2016Q4	us-gaap	Interest Rate Derivative Liabilities At Fair Value InterestRateDerivativeLiabilitiesAtFairValue	61562000	USD
CY2017Q3	us-gaap	Interest Rate Derivative Liabilities At Fair Value InterestRateDerivativeLiabilitiesAtFairValue	27076000	USD
CY2016Q3	us-gaap	Labor And Related Expense LaborAndRelatedExpense	55162000	USD
	us-gaap	Labor And Related Expense LaborAndRelatedExpense	166374000	USD
CY2017Q3	us-gaap	Labor And Related Expense LaborAndRelatedExpense	58327000	USD
	us-gaap	Labor And Related Expense LaborAndRelatedExpense	178386000	USD
CY2016Q4	us-gaap	Liabilities Liabilities	25461722000	USD
CY2017Q3	us-gaap	Liabilities Liabilities	26931342000	USD
CY2016Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	27880151000	USD
CY2017Q3	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	29554831000	USD
CY2016Q4	us-gaap	Liabilities Fair Value Disclosure Recurring LiabilitiesFairValueDisclosureRecurring	61562000	USD
CY2017Q3	us-gaap	Liabilities Fair Value Disclosure Recurring LiabilitiesFairValueDisclosureRecurring	27076000	USD
	us-gaap	Life Insurance Corporate Or Bank Owned Change In Value LifeInsuranceCorporateOrBankOwnedChangeInValue	2973000	USD
	us-gaap	Life Insurance Corporate Or Bank Owned Change In Value LifeInsuranceCorporateOrBankOwnedChangeInValue	4647000	USD
CY2016Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	150853000	USD
CY2017Q3	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	153725000	USD
CY2016Q4	us-gaap	Loans And Leases Receivable Deferred Income LoansAndLeasesReceivableDeferredIncome	-48641000	USD
CY2017Q3	us-gaap	Loans And Leases Receivable Deferred Income LoansAndLeasesReceivableDeferredIncome	-44422000	USD
CY2016Q4	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	18732711000	USD
CY2017Q3	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	20028032000	USD
CY2016Q3	us-gaap	Loans And Leases Receivable Impaired Interest Lost On Nonaccrual Loans LoansAndLeasesReceivableImpairedInterestLostOnNonaccrualLoans	1100000	USD
	us-gaap	Loans And Leases Receivable Impaired Interest Lost On Nonaccrual Loans LoansAndLeasesReceivableImpairedInterestLostOnNonaccrualLoans	2300000	USD
CY2017Q3	us-gaap	Loans And Leases Receivable Impaired Interest Lost On Nonaccrual Loans LoansAndLeasesReceivableImpairedInterestLostOnNonaccrualLoans	1400000	USD
	us-gaap	Loans And Leases Receivable Impaired Interest Lost On Nonaccrual Loans LoansAndLeasesReceivableImpairedInterestLostOnNonaccrualLoans	3700000	USD
CY2016Q4	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	18781352000	USD
CY2017Q3	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	20072454000	USD
CY2016Q4	us-gaap	Loans And Leases Receivable Net Reported Amount LoansAndLeasesReceivableNetReportedAmount	18630499000	USD
CY2017Q3	us-gaap	Loans And Leases Receivable Net Reported Amount LoansAndLeasesReceivableNetReportedAmount	19918729000	USD
CY2016Q4	us-gaap	Loans And Leases Receivable Net Reported Amount Covered And Not Covered LoansAndLeasesReceivableNetReportedAmountCoveredAndNotCovered	19242441000	USD
CY2017Q3	us-gaap	Loans And Leases Receivable Net Reported Amount Covered And Not Covered LoansAndLeasesReceivableNetReportedAmountCoveredAndNotCovered	20451857000	USD
CY2016Q4	us-gaap	Loans Receivable Held For Sale Net Not Part Of Disposal Group LoansReceivableHeldForSaleNetNotPartOfDisposalGroup	41198000	USD
CY2017Q3	us-gaap	Loans Receivable Held For Sale Net Not Part Of Disposal Group LoansReceivableHeldForSaleNetNotPartOfDisposalGroup	31507000	USD
CY2016Q4	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	402809000	USD
CY2017Q3	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	402828000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	3090326000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	1397859000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-3323160000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-1784731000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	227288000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	231160000	USD
CY2016Q3	us-gaap	Net Income Loss NetIncomeLoss	50848000	USD
	us-gaap	Net Income Loss NetIncomeLoss	162447000	USD
CY2017Q3	us-gaap	Net Income Loss NetIncomeLoss	67779000	USD
	us-gaap	Net Income Loss NetIncomeLoss	196479000	USD
CY2016Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	48817000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	155925000	USD
CY2017Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	65254000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	189148000	USD
CY2016Q3	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	48736000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	155661000	USD
CY2017Q3	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	65260000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	189169000	USD
	us-gaap	Noncash Or Part Noncash Acquisition Investments Acquired1 NoncashOrPartNoncashAcquisitionInvestmentsAcquired1	0	USD
	us-gaap	Noncash Or Part Noncash Acquisition Investments Acquired1 NoncashOrPartNoncashAcquisitionInvestmentsAcquired1	107500000	USD
CY2016Q4	us-gaap	Noninterest Bearing Domestic Deposit Demand NoninterestBearingDomesticDepositDemand	2960591000	USD
CY2017Q3	us-gaap	Noninterest Bearing Domestic Deposit Demand NoninterestBearingDomesticDepositDemand	3096492000	USD
CY2016Q3	us-gaap	Noninterest Expense NoninterestExpense	148004000	USD
	us-gaap	Noninterest Expense NoninterestExpense	434224000	USD
CY2017Q3	us-gaap	Noninterest Expense NoninterestExpense	156705000	USD
	us-gaap	Noninterest Expense NoninterestExpense	473697000	USD
CY2016Q3	us-gaap	Noninterest Income NoninterestIncome	25075000	USD
	us-gaap	Noninterest Income NoninterestIncome	77130000	USD
CY2017Q3	us-gaap	Noninterest Income NoninterestIncome	53326000	USD
	us-gaap	Noninterest Income NoninterestIncome	111363000	USD
CY2016Q3	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	3779000	USD
	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	10118000	USD
CY2017Q3	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	4161000	USD
	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	12055000	USD
CY2016Q3	us-gaap	Occupancy Net OccupancyNet	18867000	USD
	us-gaap	Occupancy Net OccupancyNet	57199000	USD
CY2017Q3	us-gaap	Occupancy Net OccupancyNet	18829000	USD
	us-gaap	Occupancy Net OccupancyNet	56689000	USD
CY2016Q3	us-gaap	Operating Leases Income Statement Depreciation Expense On Property Subject To Or Held For Lease OperatingLeasesIncomeStatementDepreciationExpenseOnPropertySubjectToOrHeldForLease	6855000	USD
	us-gaap	Operating Leases Income Statement Depreciation Expense On Property Subject To Or Held For Lease OperatingLeasesIncomeStatementDepreciationExpenseOnPropertySubjectToOrHeldForLease	20004000	USD
CY2017Q3	us-gaap	Operating Leases Income Statement Depreciation Expense On Property Subject To Or Held For Lease OperatingLeasesIncomeStatementDepreciationExpenseOnPropertySubjectToOrHeldForLease	8905000	USD
	us-gaap	Operating Leases Income Statement Depreciation Expense On Property Subject To Or Held For Lease OperatingLeasesIncomeStatementDepreciationExpenseOnPropertySubjectToOrHeldForLease	25655000	USD
CY2016Q3	us-gaap	Operating Leases Income Statement Lease Revenue OperatingLeasesIncomeStatementLeaseRevenue	11188000	USD
	us-gaap	Operating Leases Income Statement Lease Revenue OperatingLeasesIncomeStatementLeaseRevenue	32762000	USD
CY2017Q3	us-gaap	Operating Leases Income Statement Lease Revenue OperatingLeasesIncomeStatementLeaseRevenue	13287000	USD
	us-gaap	Operating Leases Income Statement Lease Revenue OperatingLeasesIncomeStatementLeaseRevenue	40067000	USD
CY2016Q4	us-gaap	Other Assets OtherAssets	343773000	USD
CY2017Q3	us-gaap	Other Assets OtherAssets	316688000	USD
CY2016Q3	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax	2308000	USD
	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax	78348000	USD
CY2017Q3	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax	-12787000	USD
	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax	25064000	USD
CY2016Q3	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	1396000	USD
	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	47400000	USD
CY2017Q3	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-7736000	USD
	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	15164000	USD
CY2016Q3	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax	912000	USD
	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax	30948000	USD
CY2017Q3	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax	-5051000	USD
	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax	9900000	USD
CY2016Q3	us-gaap	Other Comprehensive Income Loss Before Tax OtherComprehensiveIncomeLossBeforeTax	14405000	USD
	us-gaap	Other Comprehensive Income Loss Before Tax OtherComprehensiveIncomeLossBeforeTax	33633000	USD
CY2017Q3	us-gaap	Other Comprehensive Income Loss Before Tax OtherComprehensiveIncomeLossBeforeTax	-11067000	USD
	us-gaap	Other Comprehensive Income Loss Before Tax OtherComprehensiveIncomeLossBeforeTax	18747000	USD
CY2016Q3	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Before Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesBeforeTax	12097000	USD
	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Before Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesBeforeTax	-44715000	USD
CY2017Q3	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Before Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesBeforeTax	1720000	USD
	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Before Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesBeforeTax	-6317000	USD
CY2016Q3	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Net Of Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax	7319000	USD
	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Net Of Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax	-27052000	USD
CY2017Q3	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Net Of Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax	1040000	USD
	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Net Of Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax	-3822000	USD
CY2016Q3	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesTax	4778000	USD
	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesTax	-17663000	USD
CY2017Q3	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesTax	680000	USD
	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesTax	-2495000	USD
CY2016Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	8715000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	20348000	USD
CY2017Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-6696000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	11342000	USD
CY2016Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	3008000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	10065000	USD

bku

Amortization Accretion Of Discounts And Premiums

AmortizationAccretionOfDiscountsAndPremiums

90360000

USD

bku

Amortization Accretion Of Discounts And Premiums

AmortizationAccretionOfDiscountsAndPremiums

71111000

USD

bku

Amountsreclassifiedfrom Aoc Iintoearningsasaresultofdiscontinuationofcashflowhedgesorearlyextinguishmentofdebt

AmountsreclassifiedfromAOCIintoearningsasaresultofdiscontinuationofcashflowhedgesorearlyextinguishmentofdebt

0

USD

bku

Amountsreclassifiedfrom Aoc Iintoearningsasaresultofdiscontinuationofcashflowhedgesorearlyextinguishmentofdebt

AmountsreclassifiedfromAOCIintoearningsasaresultofdiscontinuationofcashflowhedgesorearlyextinguishmentofdebt

0

USD

CY2017Q3

bku

Availablefor Sale Securities Pledgedas Collateralfor Interest Rate Swaps

AvailableforSaleSecuritiesPledgedasCollateralforInterestRateSwaps

40000000

USD

CY2017Q3

bku

Availableforsalesecurities Gross Unrealized Loss Considered Insignificantfor Otti Analysis

AvailableforsalesecuritiesGrossUnrealizedLossConsideredInsignificantforOTTIAnalysis

237000

USD

CY2017Q3

bku

Branches Located In New York

BranchesLocatedInNewYork

6

branch

bku

Decrease Increase In Fdic Indemnification Asset Claims Filed Investing Activities

DecreaseIncreaseInFDICIndemnificationAssetClaimsFiledInvestingActivities

30829000

USD

bku

Decrease Increase In Fdic Indemnification Asset Claims Filed Investing Activities

DecreaseIncreaseInFDICIndemnificationAssetClaimsFiledInvestingActivities

16768000

USD

CY2016Q4

bku

Derivative Asset Liability Collateral Offset

DerivativeAssetLiabilityCollateralOffset

0

USD

CY2017Q3

bku

Derivative Asset Liability Collateral Offset

DerivativeAssetLiabilityCollateralOffset

0

USD

CY2016Q4

bku

Derivative Asset Liability Fair Value Amount Not Offset Against Collateral

DerivativeAssetLiabilityFairValueAmountNotOffsetAgainstCollateral

-21513000

USD

CY2017Q3

bku

Derivative Asset Liability Fair Value Amount Not Offset Against Collateral

DerivativeAssetLiabilityFairValueAmountNotOffsetAgainstCollateral

-9884000

USD

CY2016Q4

bku

Derivative Asset Liability Fair Value Gross Liability Asset

DerivativeAssetLiabilityFairValueGrossLiabilityAsset

0

USD

CY2017Q3

bku

Derivative Asset Liability Fair Value Gross Liability Asset

DerivativeAssetLiabilityFairValueGrossLiabilityAsset

0

USD

CY2016Q4

bku

Derivative Asset Liability Fair Value Of Collateral

DerivativeAssetLiabilityFairValueOfCollateral

-23796000

USD

CY2017Q3

bku

Derivative Asset Liability Fair Value Of Collateral

DerivativeAssetLiabilityFairValueOfCollateral

-10217000

USD

bku

Discontinuation Cash Flow Hedge Notional Amount

DiscontinuationCashFlowHedgeNotionalAmount

0

USD

bku

Discontinuation Cash Flow Hedge Notional Amount

DiscontinuationCashFlowHedgeNotionalAmount

0

USD

CY2017Q3

bku

Dividend Equivalent Rights

DividendEquivalentRights

3023314

shares

bku

Dividends Declared And Payable

DividendsDeclaredAndPayable

22482000

USD

bku

Dividends Declared And Payable

DividendsDeclaredAndPayable

23045000

USD

CY2016Q4

bku

Due From Federal Reserve Bank

DueFromFederalReserveBank

372640000

USD

CY2017Q3

bku

Due From Federal Reserve Bank

DueFromFederalReserveBank

254004000

USD

bku

Effective Duration Of Investment Portfolio

EffectiveDurationOfInvestmentPortfolio

P1Y8M5D

CY2015Q4

bku

Fdic Indemnification Assetand Liabilitynet

FDICIndemnificationAssetandLiabilitynet

739843000

USD

CY2016Q4

bku

Fdic Indemnification Assetand Liabilitynet

FDICIndemnificationAssetandLiabilitynet

515910000

USD

CY2017Q3

bku

Fdic Indemnification Assetand Liabilitynet

FDICIndemnificationAssetandLiabilitynet

349617000

USD

CY2016Q4

bku

Fdic Indemnification Liability

FDICIndemnificationLiability

23000

USD

CY2017Q3

bku

Fdic Indemnification Liability

FDICIndemnificationLiability

0

USD

bku

Fair Value Assets Level Transfers Amount

FairValueAssetsLevelTransfersAmount

0

USD

bku

Fair Value Assets Level Transfers Amount

FairValueAssetsLevelTransfersAmount

0

USD

CY2017Q3

bku

Fair Value Inputs Averagefarepertrip Taxi Medallion

FairValueInputsAveragefarepertripTaxiMedallion

16.12

USD

CY2017Q3

bku

Fair Value Inputs Days Workedper Month Taxi Medallion

FairValueInputsDaysWorkedperMonthTaxiMedallion

25.6

CY2017Q3

bku

Fair Value Inputs Numberoftripspershift Taxi Medallion

FairValueInputsNumberoftripspershiftTaxiMedallion

15.4

CY2017Q3

bku

Fair Value Inputs Second Shift Rental Achievement Rate Taxi Medallion

FairValueInputsSecondShiftRentalAchievementRateTaxiMedallion

0.546

CY2016Q3

bku

Gain Loss On Indemnification Asset

GainLossOnIndemnificationAsset

993000

USD

bku

Gain Loss On Indemnification Asset

GainLossOnIndemnificationAsset

-9410000

USD

CY2016

bku

Gain Loss On Indemnification Asset

GainLossOnIndemnificationAsset

-17759000

USD

CY2017Q3

bku

Gain Loss On Indemnification Asset

GainLossOnIndemnificationAsset

-4838000

USD

bku

Gain Loss On Indemnification Asset

GainLossOnIndemnificationAsset

-14174000

USD

CY2016Q3

bku

Gain Lossonindemnificationassetfromcoveredloanssold

GainLossonindemnificationassetfromcoveredloanssold

8026000

USD

bku

Gain Lossonindemnificationassetfromcoveredloanssold

GainLossonindemnificationassetfromcoveredloanssold

11958000

USD

bku

Gain Lossonindemnificationassetfromcoveredloanssold

GainLossonindemnificationassetfromcoveredloanssold

1266000

USD

CY2016Q4

bku

Gross Amounts Recognized Derivative Assets And Liabilities

GrossAmountsRecognizedDerivativeAssetsAndLiabilities

-21513000

USD

CY2017Q3

bku

Gross Amounts Recognized Derivative Assets And Liabilities

GrossAmountsRecognizedDerivativeAssetsAndLiabilities

-9884000

USD

CY2016Q3

bku

Income Loss From Resolution Of Covered Assets

IncomeLossFromResolutionOfCoveredAssets

8883000

USD

bku

Income Loss From Resolution Of Covered Assets

IncomeLossFromResolutionOfCoveredAssets

26426000

USD

CY2017Q3

bku

Income Loss From Resolution Of Covered Assets

IncomeLossFromResolutionOfCoveredAssets

6400000

USD

bku

Income Loss From Resolution Of Covered Assets

IncomeLossFromResolutionOfCoveredAssets

22066000

USD

CY2017Q3

bku

Interestratederivativecontractscentrallyclearedthroughthe Cme

InterestratederivativecontractscentrallyclearedthroughtheCME

0

USD

CY2016Q4

bku

Loans And Leases Receivable Allowance Covered And Not Covered

LoansAndLeasesReceivableAllowanceCoveredAndNotCovered

152953000

USD

CY2017Q3

bku

Loans And Leases Receivable Allowance Covered And Not Covered

LoansAndLeasesReceivableAllowanceCoveredAndNotCovered

158573000

USD

CY2016Q4

bku

Loans And Leases Receivable Deferred Income Covered And Not Covered

LoansAndLeasesReceivableDeferredIncomeCoveredAndNotCovered

-42137000

USD

CY2017Q3

bku

Loans And Leases Receivable Deferred Income Covered And Not Covered

LoansAndLeasesReceivableDeferredIncomeCoveredAndNotCovered

-40105000

USD

CY2016Q4

bku

Loans And Leases Receivable Net Of Deferred Income Covered

LoansAndLeasesReceivableNetOfDeferredIncomeCovered

614042000

USD

CY2017Q3

bku

Loans And Leases Receivable Net Of Deferred Income Covered

LoansAndLeasesReceivableNetOfDeferredIncomeCovered

537976000

USD

CY2016Q4

bku

Loans And Leases Receivable Net Of Deferred Income Covered And Not Covered

LoansAndLeasesReceivableNetOfDeferredIncomeCoveredAndNotCovered

19395394000

USD

CY2017Q3

bku

Loans And Leases Receivable Net Of Deferred Income Covered And Not Covered

LoansAndLeasesReceivableNetOfDeferredIncomeCoveredAndNotCovered

20610430000

USD

CY2016Q4

bku

Loansand Leases Receivable Gross Coveredand Non Covered

LoansandLeasesReceivableGrossCoveredandNonCovered

19353257000

USD

CY2017Q3

bku

Loansand Leases Receivable Gross Coveredand Non Covered

LoansandLeasesReceivableGrossCoveredandNonCovered

20570325000

USD

CY2009Q2

bku

Maximum Amount Fdic Will Reimburse

MaximumAmountFDICWillReimburse

4000000000

USD

CY2017Q3

bku

Number Of Branches

NumberOfBranches

90

branch

CY2017Q3

bku

Number Of Geographic Areas Branches Located In

NumberOfGeographicAreasBranchesLocatedIn

15

county

CY2016Q4

bku

Number Of Held To Maturity Securities

NumberOfHeldToMaturitySecurities

1

security

CY2017Q3

bku

Number Of Held To Maturity Securities

NumberOfHeldToMaturitySecurities

1

security

CY2009Q2

bku

Number Of Loss Sharing Agreements

NumberOfLossSharingAgreements

2

CY2017Q3

bku

Number Of Securities Amount Of Impairment Insignificant

NumberOfSecuritiesAmountOfImpairmentInsignificant

20

security

CY2016Q3

bku

Number Of Securities Determined To Be Other Than Temporarily Impaired During The Period

NumberOfSecuritiesDeterminedToBeOtherThanTemporarilyImpairedDuringThePeriod

2

security

bku

Number Of Securities Determined To Be Other Than Temporarily Impaired During The Period

NumberOfSecuritiesDeterminedToBeOtherThanTemporarilyImpairedDuringThePeriod

2

security

CY2017Q3

bku

Number Of Securities Determined To Be Other Than Temporarily Impaired During The Period

NumberOfSecuritiesDeterminedToBeOtherThanTemporarilyImpairedDuringThePeriod

0

security

bku

Number Of Securities Determined To Be Other Than Temporarily Impaired During The Period

NumberOfSecuritiesDeterminedToBeOtherThanTemporarilyImpairedDuringThePeriod

0

security

bku

Number Of Subsidiaries

NumberOfSubsidiaries

1

subsidiary

CY2009Q2

bku

Percent Fdic Will Reimburse For Losses

PercentFDICWillReimburseForLosses

0.8

CY2009Q2

bku

Percent Of Losses In Excess Of Maximum Amount Fdic Will Reimburse

PercentOfLossesInExcessOfMaximumAmountFDICWillReimburse

0.95

CY2016Q4

bku

Percent Of Total Loans

PercentOfTotalLoans

1.000

CY2017Q3

bku

Percent Of Total Loans

PercentOfTotalLoans

1.000

CY2016Q4

bku

Unpaid Principal Balance Of Aci Loans

UnpaidPrincipalBalanceOfAciLoans

1500000000

USD

CY2017Q3

bku

Unpaid Principal Balance Of Aci Loans

UnpaidPrincipalBalanceOfAciLoans

1200000000

USD

CY2017Q3

bku

Value Of Pledged Real Estate Loans With Unpaid Principal Balance

ValueOfPledgedRealEstateLoansWithUnpaidPrincipalBalance

10500000000

USD

bku

Weighted Average Life Of Investment Portfolio

WeightedAverageLifeOfInvestmentPortfolio

P4Y10M24D

dei

Amendment Flag

AmendmentFlag

false

dei

Current Fiscal Year End Date

CurrentFiscalYearEndDate

--12-31

dei

Document Fiscal Period Focus

DocumentFiscalPeriodFocus

Q3

dei

Document Fiscal Year Focus

DocumentFiscalYearFocus

2017

dei

Document Period End Date

DocumentPeriodEndDate

2017-09-30

dei

Document Type

DocumentType

10-Q

dei

Entity Central Index Key

EntityCentralIndexKey

0001504008

CY2017Q4

dei

Entity Common Stock Shares Outstanding

EntityCommonStockSharesOutstanding

106820503

shares

dei

Entity Current Reporting Status

EntityCurrentReportingStatus

Yes

dei

Entity Filer Category

EntityFilerCategory

Large Accelerated Filer

dei

Entity Registrant Name

EntityRegistrantName

BankUnited, Inc.

dei

Entity Voluntary Filers

EntityVoluntaryFilers

No

dei

Entity Well Known Seasoned Issuer

EntityWellKnownSeasonedIssuer

Yes

CY2016Q4

invest

Derivative Notional Amount

DerivativeNotionalAmount

4217114000

USD

CY2017Q3

invest

Derivative Notional Amount

DerivativeNotionalAmount

4339440000

USD

CY2015Q4

us-gaap

Accumulated Other Comprehensive Income Loss Net Of Tax

AccumulatedOtherComprehensiveIncomeLossNetOfTax

22182000

USD

CY2016Q3

us-gaap

Accumulated Other Comprehensive Income Loss Net Of Tax

AccumulatedOtherComprehensiveIncomeLossNetOfTax

42530000

USD

CY2016Q4

us-gaap

Accumulated Other Comprehensive Income Loss Net Of Tax

AccumulatedOtherComprehensiveIncomeLossNetOfTax

41247000

USD

CY2017Q3

us-gaap

Accumulated Other Comprehensive Income Loss Net Of Tax

AccumulatedOtherComprehensiveIncomeLossNetOfTax

52589000

USD

CY2016Q4

us-gaap

Additional Paid In Capital

AdditionalPaidInCapital

1426459000

USD

CY2017Q3

us-gaap

Additional Paid In Capital

AdditionalPaidInCapital

1492790000

USD

us-gaap

Adjustments To Additional Paid In Capital Tax Effect From Share Based Compensation

AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation

847000

USD

CY2016Q4

us-gaap

Advances From Federal Home Loan Banks

AdvancesFromFederalHomeLoanBanks

5239348000

USD

CY2017Q3

us-gaap

Advances From Federal Home Loan Banks

AdvancesFromFederalHomeLoanBanks

4871000000

USD

CY2016Q3

us-gaap

Allowance For Loan And Lease Loss Recovery Of Bad Debts

AllowanceForLoanAndLeaseLossRecoveryOfBadDebts

1212000

USD

us-gaap

Allowance For Loan And Lease Loss Recovery Of Bad Debts

AllowanceForLoanAndLeaseLossRecoveryOfBadDebts

3033000

USD

CY2017Q3

us-gaap

Allowance For Loan And Lease Loss Recovery Of Bad Debts

AllowanceForLoanAndLeaseLossRecoveryOfBadDebts

1099000

USD

us-gaap

Allowance For Loan And Lease Loss Recovery Of Bad Debts

AllowanceForLoanAndLeaseLossRecoveryOfBadDebts

3136000

USD

CY2016Q3

us-gaap

Allowance For Loan And Lease Losses Write Offs

AllowanceForLoanAndLeaseLossesWriteOffs

6862000

USD

us-gaap

Allowance For Loan And Lease Losses Write Offs

AllowanceForLoanAndLeaseLossesWriteOffs

16834000

USD

CY2017Q3

us-gaap

Allowance For Loan And Lease Losses Write Offs

AllowanceForLoanAndLeaseLossesWriteOffs

36028000

USD

us-gaap

Allowance For Loan And Lease Losses Write Offs

AllowanceForLoanAndLeaseLossesWriteOffs

61089000

USD

CY2016Q4

us-gaap

Amortization Method Qualified Affordable Housing Project Investments

AmortizationMethodQualifiedAffordableHousingProjectInvestments

71000000

USD

CY2017Q3

us-gaap

Amortization Method Qualified Affordable Housing Project Investments

AmortizationMethodQualifiedAffordableHousingProjectInvestments

66000000

USD

CY2016Q4

us-gaap

Assets

27880151000

USD

CY2017Q3

us-gaap

Assets

29554831000

USD

CY2016Q4

us-gaap

Assets Fair Value Disclosure Recurring

AssetsFairValueDisclosureRecurring

6150975000

USD

CY2017Q3

us-gaap

Assets Fair Value Disclosure Recurring

AssetsFairValueDisclosureRecurring

6951942000

USD

CY2016Q4

us-gaap

Available For Sale Securities

AvailableForSaleSecurities

6073584000

USD

CY2017Q3

us-gaap

Available For Sale Securities

AvailableForSaleSecurities

6893472000

USD

CY2016Q4

us-gaap

Available For Sale Securities Accumulated Gross Unrealized Gain Before Tax

AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax

103806000

USD

CY2017Q3

us-gaap

Available For Sale Securities Accumulated Gross Unrealized Gain Before Tax

AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax

110304000

USD

CY2016Q4

us-gaap

Available For Sale Securities Accumulated Gross Unrealized Loss Before Tax

AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax

26425000

USD

CY2017Q3

us-gaap

Available For Sale Securities Accumulated Gross Unrealized Loss Before Tax

AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax

7858000

USD

CY2016Q4

us-gaap

Available For Sale Securities Amortized Cost

AvailableForSaleSecuritiesAmortizedCost

5996203000

USD

CY2017Q3

us-gaap

Available For Sale Securities Amortized Cost

AvailableForSaleSecuritiesAmortizedCost

6791026000

USD

CY2016Q4

us-gaap

Available For Sale Securities Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss

AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss

3673000

USD

CY2017Q3

us-gaap

Available For Sale Securities Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss

AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss

431000

USD

CY2016Q4

us-gaap

Available For Sale Securities Continuous Unrealized Loss Position Fair Value

AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue

1899556000

USD

CY2017Q3

us-gaap

Available For Sale Securities Continuous Unrealized Loss Position Fair Value

AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue

984789000

USD

CY2016Q4

us-gaap

Available For Sale Securities Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss

AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss

22752000

USD

CY2017Q3

us-gaap

Available For Sale Securities Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss

AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss

7427000

USD

CY2016Q4

us-gaap

Available For Sale Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value

AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue

1383990000

USD

CY2017Q3

us-gaap

Available For Sale Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value

AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue

936926000

USD

CY2016Q4

us-gaap

Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value

AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue

515566000

USD

CY2017Q3

us-gaap

Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value

AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue

47863000

USD

CY2017Q3

us-gaap

Available For Sale Securities Debt Maturities After Five Through Ten Years Amortized Cost

AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost

2252239000

USD

CY2017Q3

us-gaap

Available For Sale Securities Debt Maturities After Five Through Ten Years Fair Value

AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue

2282220000

USD

CY2017Q3

us-gaap

Available For Sale Securities Debt Maturities After One Through Five Years Amortized Cost

AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost

3363698000

USD

CY2017Q3

us-gaap

Available For Sale Securities Debt Maturities After One Through Five Years Fair Value

AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue

3406609000

USD

CY2017Q3

us-gaap

Available For Sale Securities Debt Maturities After Ten Years Amortized Cost

AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost

429387000

USD

CY2017Q3

us-gaap

Available For Sale Securities Debt Maturities After Ten Years Fair Value

AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue

436893000

USD

CY2017Q3

us-gaap

Available For Sale Securities Debt Maturities Within One Year Amortized Cost

AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost

684986000

USD

CY2017Q3

us-gaap

Available For Sale Securities Debt Maturities Within One Year Fair Value

AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue

697034000

USD

CY2017Q3

us-gaap

Available For Sale Securities Debt Maturities Without Single Maturity Date Amortized Cost

AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateAmortizedCost

60716000

USD

CY2017Q3

us-gaap

Available For Sale Securities Debt Maturities Without Single Maturity Date Fair Value

AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateFairValue

70716000

USD

CY2016Q3

us-gaap

Available For Sale Securities Gross Realized Gain Loss Net

AvailableForSaleSecuritiesGrossRealizedGainLossNet

3008000

USD

us-gaap

Available For Sale Securities Gross Realized Gain Loss Net

AvailableForSaleSecuritiesGrossRealizedGainLossNet

10065000

USD

CY2017Q3

us-gaap

Available For Sale Securities Gross Realized Gain Loss Net

AvailableForSaleSecuritiesGrossRealizedGainLossNet

26931000

USD

us-gaap

Available For Sale Securities Gross Realized Gain Loss Net

AvailableForSaleSecuritiesGrossRealizedGainLossNet

29194000

USD

CY2016Q3

us-gaap

Available For Sale Securities Gross Realized Gains

AvailableForSaleSecuritiesGrossRealizedGains

3471000

USD

us-gaap

Available For Sale Securities Gross Realized Gains

AvailableForSaleSecuritiesGrossRealizedGains

10528000

USD

CY2017Q3

us-gaap

Available For Sale Securities Gross Realized Gains

AvailableForSaleSecuritiesGrossRealizedGains

28261000

USD

us-gaap

Available For Sale Securities Gross Realized Gains

AvailableForSaleSecuritiesGrossRealizedGains

30553000

USD

CY2016Q3

us-gaap

Available For Sale Securities Gross Realized Losses

AvailableForSaleSecuritiesGrossRealizedLosses

0

USD

us-gaap

Available For Sale Securities Gross Realized Losses

AvailableForSaleSecuritiesGrossRealizedLosses

0

USD

CY2017Q3

us-gaap

Available For Sale Securities Gross Realized Losses

AvailableForSaleSecuritiesGrossRealizedLosses

1330000

USD

us-gaap

Available For Sale Securities Gross Realized Losses

AvailableForSaleSecuritiesGrossRealizedLosses

1359000

USD

CY2016Q4

us-gaap

Available For Sale Securities Pledged As Collateral

AvailableForSaleSecuritiesPledgedAsCollateral

1800000000

USD

CY2017Q3

us-gaap

Available For Sale Securities Pledged As Collateral

AvailableForSaleSecuritiesPledgedAsCollateral

2500000000

USD

CY2016Q3

us-gaap

Availableforsale Securities Gross Realized Gain Loss Excluding Other Than Temporary Impairments

AvailableforsaleSecuritiesGrossRealizedGainLossExcludingOtherThanTemporaryImpairments

3471000

USD

us-gaap

Availableforsale Securities Gross Realized Gain Loss Excluding Other Than Temporary Impairments

AvailableforsaleSecuritiesGrossRealizedGainLossExcludingOtherThanTemporaryImpairments

10528000

USD

CY2017Q3

us-gaap

Availableforsale Securities Gross Realized Gain Loss Excluding Other Than Temporary Impairments

AvailableforsaleSecuritiesGrossRealizedGainLossExcludingOtherThanTemporaryImpairments

26931000

USD

us-gaap

Availableforsale Securities Gross Realized Gain Loss Excluding Other Than Temporary Impairments

AvailableforsaleSecuritiesGrossRealizedGainLossExcludingOtherThanTemporaryImpairments

29194000

USD

CY2017Q3

us-gaap

Availableforsale Securities In Unrealized Loss Positions Qualitative Disclosure Number Of Positions1

AvailableforsaleSecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions1

54

security

CY2016Q4

us-gaap

Bank Owned Life Insurance

BankOwnedLifeInsurance

239736000

USD

CY2017Q3

us-gaap

Bank Owned Life Insurance

BankOwnedLifeInsurance

248876000

USD

CY2015Q4

us-gaap

Cash And Cash Equivalents At Carrying Value

CashAndCashEquivalentsAtCarryingValue

267500000

USD

CY2016Q3

us-gaap

Cash And Cash Equivalents At Carrying Value

CashAndCashEquivalentsAtCarryingValue

261954000

USD

CY2016Q4

us-gaap

Cash And Cash Equivalents At Carrying Value

CashAndCashEquivalentsAtCarryingValue

448313000

USD

CY2017Q3

us-gaap

Cash And Cash Equivalents At Carrying Value

CashAndCashEquivalentsAtCarryingValue

292601000

USD

us-gaap

Cash And Cash Equivalents Period Increase Decrease

CashAndCashEquivalentsPeriodIncreaseDecrease

-5546000

USD

us-gaap

Cash And Cash Equivalents Period Increase Decrease

CashAndCashEquivalentsPeriodIncreaseDecrease

-155712000

USD

CY2016Q4

us-gaap

Cash And Due From Banks

CashAndDueFromBanks

40260000

USD

CY2017Q3

us-gaap

Cash And Due From Banks

CashAndDueFromBanks

34883000

USD

CY2016Q4

us-gaap

Commitments And Contingencies

CommitmentsAndContingencies

USD

CY2017Q3

us-gaap

Commitments And Contingencies

CommitmentsAndContingencies

USD

CY2016Q3

us-gaap

Common Stock Dividends Per Share Declared

CommonStockDividendsPerShareDeclared

0.21

us-gaap

Common Stock Dividends Per Share Declared

CommonStockDividendsPerShareDeclared

0.63

CY2017Q3

us-gaap

Common Stock Dividends Per Share Declared

CommonStockDividendsPerShareDeclared

0.21

us-gaap

Common Stock Dividends Per Share Declared

CommonStockDividendsPerShareDeclared

0.63

CY2016Q4

us-gaap

Common Stock Par Or Stated Value Per Share

CommonStockParOrStatedValuePerShare

0.01

CY2017Q3

us-gaap

Common Stock Par Or Stated Value Per Share

CommonStockParOrStatedValuePerShare

0.01

CY2016Q4

us-gaap

Common Stock Shares Authorized

CommonStockSharesAuthorized

400000000

shares

CY2017Q3

us-gaap

Common Stock Shares Authorized

CommonStockSharesAuthorized

400000000

shares

CY2016Q4

us-gaap

Common Stock Shares Issued

CommonStockSharesIssued

104166945

shares

CY2017Q3

us-gaap

Common Stock Shares Issued

CommonStockSharesIssued

106821902

shares

CY2016Q4

us-gaap

Common Stock Shares Outstanding

CommonStockSharesOutstanding

104166945

shares

CY2017Q3

us-gaap

Common Stock Shares Outstanding

CommonStockSharesOutstanding

106821902

shares

CY2016Q4

us-gaap

Common Stock Value

CommonStockValue

1042000

USD

CY2017Q3

us-gaap

Common Stock Value

CommonStockValue

1068000

USD

CY2016Q3

us-gaap

Communications And Information Technology

CommunicationsAndInformationTechnology

3746000

USD

us-gaap

Communications And Information Technology

CommunicationsAndInformationTechnology

10800000

USD

CY2017Q3

us-gaap

Communications And Information Technology

CommunicationsAndInformationTechnology

3452000

USD

us-gaap

Communications And Information Technology

CommunicationsAndInformationTechnology

10481000

USD

CY2016Q3

us-gaap

Comprehensive Income Net Of Tax

ComprehensiveIncomeNetOfTax

59563000

USD

us-gaap

Comprehensive Income Net Of Tax

ComprehensiveIncomeNetOfTax

182795000

USD

CY2017Q3

us-gaap

Comprehensive Income Net Of Tax

ComprehensiveIncomeNetOfTax

61083000

USD

us-gaap

Comprehensive Income Net Of Tax

ComprehensiveIncomeNetOfTax

207821000

USD

us-gaap

Deferred Income Tax Expense Benefit

DeferredIncomeTaxExpenseBenefit

33958000

USD

us-gaap

Deferred Income Tax Expense Benefit

DeferredIncomeTaxExpenseBenefit

31625000

USD

CY2016Q4

us-gaap

Deferred Tax Assets Net

DeferredTaxAssetsNet

62940000

USD

CY2017Q3

us-gaap

Deferred Tax Assets Net

DeferredTaxAssetsNet

23910000

USD

CY2016Q4

us-gaap

Deposits

19490890000

USD

CY2017Q3

us-gaap

Deposits

21223244000

USD

CY2016Q4

us-gaap

Deposits Savings Deposits

DepositsSavingsDeposits

9251593000

USD

CY2017Q3

us-gaap

Deposits Savings Deposits

DepositsSavingsDeposits

9964242000

USD

us-gaap

Depreciation Amortization And Accretion Net

DepreciationAmortizationAndAccretionNet

38971000

USD

us-gaap

Depreciation Amortization And Accretion Net

DepreciationAmortizationAndAccretionNet

45204000

USD

CY2016Q4

us-gaap

Derivative Asset Collateral Obligation To Return Cash Offset

DerivativeAssetCollateralObligationToReturnCashOffset

0

USD

CY2017Q3

us-gaap

Derivative Asset Collateral Obligation To Return Cash Offset

DerivativeAssetCollateralObligationToReturnCashOffset

0

USD

CY2016Q4

us-gaap

Derivative Asset Fair Value Gross Liability

DerivativeAssetFairValueGrossLiability

27485000

USD

CY2017Q3

us-gaap

Derivative Asset Fair Value Gross Liability

DerivativeAssetFairValueGrossLiability

6814000

USD

CY2016Q4

us-gaap

Derivative Asset Fair Value Of Collateral

DerivativeAssetFairValueOfCollateral

0

USD

CY2017Q3

us-gaap

Derivative Asset Fair Value Of Collateral

DerivativeAssetFairValueOfCollateral

1539000

USD

CY2016Q4

us-gaap

Derivative Assets

DerivativeAssets

2364000

USD

CY2017Q3

us-gaap

Derivative Assets

DerivativeAssets

333000

USD

CY2016Q4

us-gaap

Derivative Assets Liabilities At Fair Value Net

DerivativeAssetsLiabilitiesAtFairValueNet

2283000

USD

CY2017Q3

us-gaap

Derivative Assets Liabilities At Fair Value Net

DerivativeAssetsLiabilitiesAtFairValueNet

333000

USD

CY2017Q3

us-gaap

Derivative Collateral Right To Reclaim Cash

DerivativeCollateralRightToReclaimCash

2000000

USD

CY2016Q4

us-gaap

Derivative Fair Value Of Derivative Asset

DerivativeFairValueOfDerivativeAsset

29849000

USD

CY2017Q3

us-gaap

Derivative Fair Value Of Derivative Asset

DerivativeFairValueOfDerivativeAsset

8686000

USD

CY2016Q4

us-gaap

Derivative Fair Value Of Derivative Asset Amount Not Offset Against Collateral

DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral

29849000

USD

CY2017Q3

us-gaap

Derivative Fair Value Of Derivative Asset Amount Not Offset Against Collateral

DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral

8686000

USD

CY2016Q4

us-gaap

Derivative Fair Value Of Derivative Liability

DerivativeFairValueOfDerivativeLiability

51362000

USD

CY2017Q3

us-gaap

Derivative Fair Value Of Derivative Liability

DerivativeFairValueOfDerivativeLiability

18570000

USD

CY2016Q4

us-gaap

Derivative Fair Value Of Derivative Liability Amount Not Offset Against Collateral

DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral

51362000

USD

CY2017Q3

us-gaap

Derivative Fair Value Of Derivative Liability Amount Not Offset Against Collateral

DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral

18570000

USD

CY2016Q3

us-gaap

Derivative Instruments Loss Reclassified From Accumulated Oci Into Income Effective Portion

DerivativeInstrumentsLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortion

3741000

USD

us-gaap

Derivative Instruments Loss Reclassified From Accumulated Oci Into Income Effective Portion

DerivativeInstrumentsLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortion

13050000

USD

CY2017Q3

us-gaap

Derivative Instruments Loss Reclassified From Accumulated Oci Into Income Effective Portion

DerivativeInstrumentsLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortion

2001000

USD

us-gaap

Derivative Instruments Loss Reclassified From Accumulated Oci Into Income Effective Portion

DerivativeInstrumentsLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortion

7463000

USD

CY2016Q4

us-gaap

Derivative Liabilities

DerivativeLiabilities

81000

USD

CY2017Q3

us-gaap

Derivative Liabilities

DerivativeLiabilities

0

USD

CY2016Q4

us-gaap

Derivative Liability Collateral Right To Reclaim Cash Offset

DerivativeLiabilityCollateralRightToReclaimCashOffset

0

USD

CY2017Q3

us-gaap

Derivative Liability Collateral Right To Reclaim Cash Offset

DerivativeLiabilityCollateralRightToReclaimCashOffset

0

USD

CY2016Q4

us-gaap

Derivative Liability Fair Value Gross Asset

DerivativeLiabilityFairValueGrossAsset

27485000

USD

CY2017Q3

us-gaap

Derivative Liability Fair Value Gross Asset

DerivativeLiabilityFairValueGrossAsset

6814000

USD

CY2016Q4

us-gaap

Derivative Liability Fair Value Of Collateral

DerivativeLiabilityFairValueOfCollateral

23796000

USD

CY2017Q3

us-gaap

Derivative Liability Fair Value Of Collateral

DerivativeLiabilityFairValueOfCollateral

11756000

USD

us-gaap

Dividends Common Stock Cash

DividendsCommonStockCash

67444000

USD

us-gaap

Dividends Common Stock Cash

DividendsCommonStockCash

69118000

USD

CY2016Q3

us-gaap

Earnings Per Share Basic

EarningsPerShareBasic

0.47

us-gaap

Earnings Per Share Basic

EarningsPerShareBasic

1.52

CY2017Q3

us-gaap

Earnings Per Share Basic

EarningsPerShareBasic

0.62

us-gaap

Earnings Per Share Basic

EarningsPerShareBasic

1.79

CY2016Q3

us-gaap

Earnings Per Share Diluted

EarningsPerShareDiluted

0.47

us-gaap

Earnings Per Share Diluted

EarningsPerShareDiluted

1.50

CY2017Q3

us-gaap

Earnings Per Share Diluted

EarningsPerShareDiluted

0.62

us-gaap

Earnings Per Share Diluted

EarningsPerShareDiluted

1.79

CY2016Q3

us-gaap

Effective Income Tax Rate Continuing Operations

EffectiveIncomeTaxRateContinuingOperations

0.317

us-gaap

Effective Income Tax Rate Continuing Operations

EffectiveIncomeTaxRateContinuingOperations

0.3324

CY2017Q3

us-gaap

Effective Income Tax Rate Continuing Operations

EffectiveIncomeTaxRateContinuingOperations

0.322

us-gaap

Effective Income Tax Rate Continuing Operations

EffectiveIncomeTaxRateContinuingOperations

0.312

us-gaap

Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate

EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate

0.35

CY2017Q3

us-gaap

Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate

EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate

0.35

us-gaap

Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate

EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate

0.35

us-gaap

Employee Service Share Based Compensation Tax Benefit From Exercise Of Stock Options

EmployeeServiceShareBasedCompensationTaxBenefitFromExerciseOfStockOptions

3800000

USD

CY2016Q4

us-gaap

Fdic Indemnification Asset

FDICIndemnificationAsset

515933000

USD

CY2017Q3

us-gaap

Fdic Indemnification Asset

FDICIndemnificationAsset

349617000

USD

CY2016Q3

us-gaap

Fdic Indemnification Asset Accretion Of Discount

FDICIndemnificationAssetAccretionOfDiscount

38957000

USD

us-gaap

Fdic Indemnification Asset Accretion Of Discount

FDICIndemnificationAssetAccretionOfDiscount

116711000

USD

CY2016

us-gaap

Fdic Indemnification Asset Accretion Of Discount

FDICIndemnificationAssetAccretionOfDiscount

160091000

USD

CY2017Q3

us-gaap

Fdic Indemnification Asset Accretion Of Discount

FDICIndemnificationAssetAccretionOfDiscount

45225000

USD

us-gaap

Fdic Indemnification Asset Accretion Of Discount

FDICIndemnificationAssetAccretionOfDiscount

135351000

USD

CY2016

us-gaap

Fdic Indemnification Asset Cash Payments Received

FDICIndemnificationAssetCashPaymentsReceived

46083000

USD

us-gaap

Fdic Indemnification Asset Cash Payments Received

FDICIndemnificationAssetCashPaymentsReceived

16768000

USD

CY2016Q3

us-gaap

Federal Deposit Insurance Corporation Premium Expense

FederalDepositInsuranceCorporationPremiumExpense

4943000

USD

us-gaap

Federal Deposit Insurance Corporation Premium Expense

FederalDepositInsuranceCorporationPremiumExpense

12866000

USD

CY2017Q3

us-gaap

Federal Deposit Insurance Corporation Premium Expense

FederalDepositInsuranceCorporationPremiumExpense

5764000

USD

us-gaap

Federal Deposit Insurance Corporation Premium Expense

FederalDepositInsuranceCorporationPremiumExpense

16827000

USD

CY2016Q4

us-gaap

Federal Home Loan Bank Stock And Federal Reserve Bank Stock

FederalHomeLoanBankStockAndFederalReserveBankStock

284272000

USD

CY2017Q3

us-gaap

Federal Home Loan Bank Stock And Federal Reserve Bank Stock

FederalHomeLoanBankStockAndFederalReserveBankStock

270239000

USD

CY2016Q3

us-gaap

Fees And Commissions

FeesAndCommissions

5171000

USD

us-gaap

Fees And Commissions

FeesAndCommissions

14529000

USD

CY2017Q3

us-gaap

Fees And Commissions

FeesAndCommissions

4938000

USD

us-gaap

Fees And Commissions

FeesAndCommissions

15554000

USD

us-gaap

Fees And Commissions Depositor Accounts

FeesAndCommissionsDepositorAccounts

9800000

USD

CY2015Q4

us-gaap

Financing Receivable Allowance For Credit Losses