$bku 2018 Q2 10-Q

Concept	2018 Q2	2017 Q2
Revenue	$348.9M	$298.8M
YoY Change	16.74%	14.73%
Cost Of Revenue
YoY Change
Gross Profit
YoY Change
Gross Profit Margin
Selling, General & Admin
YoY Change
% of Gross Profit
Research & Development	$8.644M	$3.745M
YoY Change	130.81%	0.64%
% of Gross Profit
Depreciation & Amortization	$15.80M	$15.20M
YoY Change	3.95%	18.75%
% of Gross Profit
Operating Expenses	$8.644M	$3.745M
YoY Change	130.81%	0.64%
Operating Profit
YoY Change
Interest Expense	$93.59M	$59.25M
YoY Change	57.97%	28.37%
% of Operating Profit
Other Income/Expense, Net
YoY Change
Pretax Income	$117.0M	$95.43M
YoY Change	22.6%	12.64%
Income Tax	$27.09M	$29.02M
% Of Pretax Income	23.16%	30.41%
Net Earnings	$89.90M	$66.41M
YoY Change	35.38%	17.07%
Net Earnings / Revenue	25.77%	22.22%
Basic Earnings Per Share	$0.82	$0.60
Diluted Earnings Per Share	$0.82	$0.60
COMMON SHARES
Basic Shares Outstanding	104.9M shares	105.7M shares
Diluted Shares Outstanding	105.5M shares	106.1M shares

Concept	2018 Q2	2017 Q2
SHORT-TERM ASSETS
Cash & Short-Term Investments
YoY Change
Cash & Equivalents	$379.3M	$228.4M
Short-Term Investments
Other Short-Term Assets
YoY Change
Inventory
Prepaid Expenses
Receivables
Other Receivables
Total Short-Term Assets
YoY Change
LONG-TERM ASSETS
Property, Plant & Equipment	$591.0M	$573.0M
YoY Change	3.14%	19.62%
Goodwill
YoY Change
Intangibles
YoY Change
Long-Term Investments
YoY Change
Other Assets		$26.00M
YoY Change		-63.89%
Total Long-Term Assets
YoY Change
TOTAL ASSETS
Total Short-Term Assets
Total Long-Term Assets
Total Assets	$31.35B	$28.99B
YoY Change	8.13%	10.2%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable
YoY Change
Accrued Expenses
YoY Change
Deferred Revenue
YoY Change
Short-Term Debt
YoY Change
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities
YoY Change
LONG-TERM LIABILITIES
Long-Term Debt	$403.0M	$403.0M
YoY Change	0.0%	0.0%
Other Long-Term Liabilities	$598.0M	$282.0M
YoY Change	112.06%	-29.32%
Total Long-Term Liabilities	$1.001B	$685.0M
YoY Change	46.13%	-14.59%
TOTAL LIABILITIES
Total Short-Term Liabilities
Total Long-Term Liabilities	$1.001B	$685.0M
Total Liabilities	$28.25B	$26.41B
YoY Change	6.96%	10.15%
SHAREHOLDERS EQUITY
Retained Earnings	$1.592B	$1.032B
YoY Change	54.23%	17.24%
Common Stock	$1.062M	$1.068M
YoY Change	-0.56%	2.5%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$3.099B	$2.581B
YoY Change
Total Liabilities & Shareholders Equity	$31.35B	$28.99B
YoY Change	8.13%	10.2%

Concept	2018 Q2	2017 Q2
OPERATING ACTIVITIES
Net Income	$89.90M	$66.41M
YoY Change	35.38%	17.07%
Depreciation, Depletion And Amortization	$15.80M	$15.20M
YoY Change	3.95%	18.75%
Cash From Operating Activities	$91.80M	$93.50M
YoY Change	-1.82%	8.47%
INVESTING ACTIVITIES
Capital Expenditures	-$42.10M	-$24.90M
YoY Change	69.08%	611.43%
Acquisitions
YoY Change
Other Investing Activities	-$455.4M	-$1.075B
YoY Change	-57.63%	-19.91%
Cash From Investing Activities	-$497.4M	-$1.100B
YoY Change	-54.77%	-18.26%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	585.2M	995.0M
YoY Change	-41.19%	-27.53%
NET CHANGE
Cash From Operating Activities	91.80M	93.50M
Cash From Investing Activities	-497.4M	-1.100B
Cash From Financing Activities	585.2M	995.0M
Net Change In Cash	179.6M	-11.10M
YoY Change	-1718.02%	-109.75%
FREE CASH FLOW
Cash From Operating Activities	$91.80M	$93.50M
Capital Expenditures	-$42.10M	-$24.90M
Free Cash Flow	$133.9M	$118.4M
YoY Change	13.09%	32.0%

Frame	Concept Type	Concept / XBRL Key	Value	Unit
	bku	Discontinuation Cash Flow Hedge Notional Amount DiscontinuationCashFlowHedgeNotionalAmount	0	USD
	us-gaap	Available For Sale Securities Gross Realized Gains AvailableForSaleSecuritiesGrossRealizedGains	2292000	USD
	bku	Amortization Accretion Of Discounts And Premiums AmortizationAccretionOfDiscountsAndPremiums	49408000	USD
	bku	Amortization Accretion Of Discounts And Premiums AmortizationAccretionOfDiscountsAndPremiums	69157000	USD
	bku	Amountsreclassifiedfrom Aoc Iintoearningsasaresultofdiscontinuationofcashflowhedgesorearlyextinguishmentofdebt AmountsreclassifiedfromAOCIintoearningsasaresultofdiscontinuationofcashflowhedgesorearlyextinguishmentofdebt	0	USD
	bku	Amountsreclassifiedfrom Aoc Iintoearningsasaresultofdiscontinuationofcashflowhedgesorearlyextinguishmentofdebt AmountsreclassifiedfromAOCIintoearningsasaresultofdiscontinuationofcashflowhedgesorearlyextinguishmentofdebt	0	USD
CY2018Q2	bku	Availableforsalesecurities Gross Unrealized Loss Considered Insignificantfor Otti Analysis AvailableforsalesecuritiesGrossUnrealizedLossConsideredInsignificantforOTTIAnalysis	313000	USD
CY2018Q2	bku	Derivative Asset Liability Fair Value Of Collateral DerivativeAssetLiabilityFairValueOfCollateral	24266000	USD
	bku	Discontinuation Cash Flow Hedge Notional Amount DiscontinuationCashFlowHedgeNotionalAmount	0	USD
CY2018Q2	bku	Branches Located In New York BranchesLocatedInNewYork	5	banking_center
CY2017Q4	bku	Derivative Asset Liability Collateral Offset DerivativeAssetLiabilityCollateralOffset	0	USD
CY2018Q2	bku	Derivative Asset Liability Collateral Offset DerivativeAssetLiabilityCollateralOffset	0	USD
CY2017Q4	bku	Derivative Asset Liability Fair Value Amount Not Offset Against Collateral DerivativeAssetLiabilityFairValueAmountNotOffsetAgainstCollateral	44000	USD
CY2018Q2	bku	Derivative Asset Liability Fair Value Amount Not Offset Against Collateral DerivativeAssetLiabilityFairValueAmountNotOffsetAgainstCollateral	24661000	USD
CY2017Q4	bku	Derivative Asset Liability Fair Value Gross Liability Asset DerivativeAssetLiabilityFairValueGrossLiabilityAsset	0	USD
CY2018Q2	bku	Derivative Asset Liability Fair Value Gross Liability Asset DerivativeAssetLiabilityFairValueGrossLiabilityAsset	0	USD
CY2017Q4	bku	Derivative Asset Liability Fair Value Of Collateral DerivativeAssetLiabilityFairValueOfCollateral	259000	USD
CY2018Q2	bku	Dividend Equivalent Rights DividendEquivalentRights	3023314	shares
	bku	Dividends Declared And Payable DividendsDeclaredAndPayable	23034000	USD
	bku	Dividends Declared And Payable DividendsDeclaredAndPayable	22916000	USD
	bku	Effective Duration Of Investment Portfolio EffectiveDurationOfInvestmentPortfolio	P1Y6M4D
CY2016Q4	bku	Fdic Indemnification Assetand Liabilitynet FDICIndemnificationAssetandLiabilitynet	515910000	USD
CY2017Q4	bku	Fdic Indemnification Assetand Liabilitynet FDICIndemnificationAssetandLiabilitynet	295635000	USD
CY2018Q2	bku	Fdic Indemnification Assetand Liabilitynet FDICIndemnificationAssetandLiabilitynet	200783000	USD
CY2017	bku	Fair Value Assets Level Transfers Amount FairValueAssetsLevelTransfersAmount	0	USD
	bku	Fair Value Assets Level Transfers Amount FairValueAssetsLevelTransfersAmount	0	USD
	bku	Fair Value Inputs Averagefarepertrip Taxi Medallion FairValueInputsAveragefarepertripTaxiMedallion	16.02	USD
	bku	Fair Value Inputs Days Workedper Month Taxi Medallion FairValueInputsDaysWorkedperMonthTaxiMedallion	25.8
	bku	Fair Value Inputs Numberoftripspershift Taxi Medallion FairValueInputsNumberoftripspershiftTaxiMedallion	15.7
	bku	Fair Value Inputs Second Shift Rental Achievement Rate Taxi Medallion FairValueInputsSecondShiftRentalAchievementRateTaxiMedallion	0.548
CY2018Q2	bku	Financialcollateralpledgedforinterestrateswaps Financialcollateralpledgedforinterestrateswaps	38000000	USD
CY2017Q2	bku	Gain Loss On Indemnification Asset GainLossOnIndemnificationAsset	-2588000	USD
	bku	Gain Loss On Indemnification Asset GainLossOnIndemnificationAsset	-9336000	USD
CY2017	bku	Gain Loss On Indemnification Asset GainLossOnIndemnificationAsset	-22220000	USD
CY2018Q2	bku	Gain Loss On Indemnification Asset GainLossOnIndemnificationAsset	-1400000	USD
	bku	Gain Loss On Indemnification Asset GainLossOnIndemnificationAsset	-5015000	USD
CY2017Q2	bku	Gain Lossonindemnificationassetfromcoveredloanssold GainLossonindemnificationassetfromcoveredloanssold	2759000	USD
	bku	Gain Lossonindemnificationassetfromcoveredloanssold GainLossonindemnificationassetfromcoveredloanssold	1257000	USD
CY2018Q2	bku	Gain Lossonindemnificationassetfromcoveredloanssold GainLossonindemnificationassetfromcoveredloanssold	1601000	USD
	bku	Gain Lossonindemnificationassetfromcoveredloanssold GainLossonindemnificationassetfromcoveredloanssold	243000	USD
CY2017Q4	bku	Gross Amounts Recognized Derivative Assets And Liabilities GrossAmountsRecognizedDerivativeAssetsAndLiabilities	44000	USD
CY2018Q2	bku	Gross Amounts Recognized Derivative Assets And Liabilities GrossAmountsRecognizedDerivativeAssetsAndLiabilities	24661000	USD
CY2017Q2	bku	Income Loss From Resolution Of Covered Assets IncomeLossFromResolutionOfCoveredAssets	8361000	USD
	bku	Income Loss From Resolution Of Covered Assets IncomeLossFromResolutionOfCoveredAssets	15666000	USD
CY2018Q2	bku	Income Loss From Resolution Of Covered Assets IncomeLossFromResolutionOfCoveredAssets	4238000	USD
	bku	Income Loss From Resolution Of Covered Assets IncomeLossFromResolutionOfCoveredAssets	7555000	USD
CY2018Q2	bku	Interestratederivativecontractscentrallyclearedthroughthe Cme InterestratederivativecontractscentrallyclearedthroughtheCME	0	USD
CY2017Q4	bku	Investmentsecuritiesrecordedatfairvalue Investmentsecuritiesrecordedatfairvalue	6680832	USD
CY2018Q2	bku	Investmentsecuritiesrecordedatfairvalue Investmentsecuritiesrecordedatfairvalue	7093068	USD
CY2017Q4	bku	Loans And Leases Receivable Allowance Covered And Not Covered LoansAndLeasesReceivableAllowanceCoveredAndNotCovered	144795000	USD
CY2018Q2	bku	Loans And Leases Receivable Allowance Covered And Not Covered LoansAndLeasesReceivableAllowanceCoveredAndNotCovered	134971000	USD
CY2017Q4	bku	Loans And Leases Receivable Deferred Income Covered And Not Covered LoansAndLeasesReceivableDeferredIncomeCoveredAndNotCovered	-45017000	USD
CY2017Q4	bku	Loans And Leases Receivable Net Of Deferred Income Covered LoansAndLeasesReceivableNetOfDeferredIncomeCovered	503118000	USD
CY2017Q4	bku	Number Of Held To Maturity Securities NumberOfHeldToMaturitySecurities	1	security
CY2018Q2	bku	Loans And Leases Receivable Deferred Income Covered And Not Covered LoansAndLeasesReceivableDeferredIncomeCoveredAndNotCovered	-42257000	USD
CY2018Q2	bku	Loans And Leases Receivable Net Of Deferred Income Covered LoansAndLeasesReceivableNetOfDeferredIncomeCovered	451350000	USD
CY2018Q2	bku	Number Of Geographic Areas Branches Located In NumberOfGeographicAreasBranchesLocatedIn	15	county
CY2017Q4	bku	Loans And Leases Receivable Net Of Deferred Income Covered And Not Covered LoansAndLeasesReceivableNetOfDeferredIncomeCoveredAndNotCovered	21416504000	USD
CY2018Q2	bku	Loans And Leases Receivable Net Of Deferred Income Covered And Not Covered LoansAndLeasesReceivableNetOfDeferredIncomeCoveredAndNotCovered	21869723000	USD
CY2017Q4	bku	Loansand Leases Receivable Gross Coveredand Non Covered LoansandLeasesReceivableGrossCoveredandNonCovered	21371487000	USD
CY2018Q2	bku	Loansand Leases Receivable Gross Coveredand Non Covered LoansandLeasesReceivableGrossCoveredandNonCovered	21827466000	USD
CY2009Q2	bku	Maximum Amount Fdic Will Reimburse MaximumAmountFDICWillReimburse	4000000000.0	USD
CY2018Q2	bku	Number Of Branches NumberOfBranches	87	branch
CY2018Q2	bku	Number Of Held To Maturity Securities NumberOfHeldToMaturitySecurities	1	security
CY2009Q2	bku	Number Of Loss Sharing Agreements NumberOfLossSharingAgreements	2
CY2018Q2	bku	Number Of Securities Amount Of Impairment Insignificant NumberOfSecuritiesAmountOfImpairmentInsignificant	32	security
CY2017Q2	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
CY2018Q2	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
CY2017Q4	bku	Percent Of Total Loans PercentOfTotalLoans	1.000
CY2018Q2	bku	Percent Of Total Loans PercentOfTotalLoans	1.000
	bku	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Date Of Grant Closing Price Maximum ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodDateOfGrantClosingPriceMaximum	40.84
	bku	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Date Of Grant Closing Price Maximum ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodDateOfGrantClosingPriceMaximum	42.80
	bku	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Date Of Grant Closing Price Minimum ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodDateOfGrantClosingPriceMinimum	34.41
	bku	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Date Of Grant Closing Price Minimum ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodDateOfGrantClosingPriceMinimum	40.28
	bku	Sharebased Compensation Arrangement By Sharebased Payment Award Equity Instruments Other Than Options Aggregate Grant Date Fair Value Vested SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateGrantDateFairValueVested	17142000	USD
	bku	Sharebased Compensation Arrangement By Sharebased Payment Award Equity Instruments Other Than Options Aggregate Grant Date Fair Value Vested SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateGrantDateFairValueVested	17825000	USD
CY2017Q4	bku	Unpaid Principal Balance Of Aci Loans UnpaidPrincipalBalanceOfAciLoans	1100000000	USD
CY2018Q2	bku	Unpaid Principal Balance Of Aci Loans UnpaidPrincipalBalanceOfAciLoans	900000000	USD
CY2018Q2	bku	Value Of Pledged Real Estate Loans With Unpaid Principal Balance ValueOfPledgedRealEstateLoansWithUnpaidPrincipalBalance	10300000000	USD
	bku	Weighted Average Life Of Investment Portfolio WeightedAverageLifeOfInvestmentPortfolio	P4Y9M7D
	dei	Amendment Flag AmendmentFlag	false
	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	Q2
	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2018
	dei	Document Period End Date DocumentPeriodEndDate	2018-06-30
	dei	Document Type DocumentType	10-Q
	dei	Entity Central Index Key EntityCentralIndexKey	0001504008
CY2018Q3	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	105352328	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
CY2017Q4	invest	Derivative Notional Amount DerivativeNotionalAmount	4392790000	USD
CY2018Q2	invest	Derivative Notional Amount DerivativeNotionalAmount	4481040000	USD
CY2016Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	41247000	USD
CY2017Q2	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	59285000	USD
CY2017Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	54986000	USD
CY2018Q2	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	50660000	USD
CY2017Q4	us-gaap	Advances From Federal Home Loan Banks AdvancesFromFederalHomeLoanBanks	4771000000	USD
CY2018Q2	us-gaap	Advances From Federal Home Loan Banks AdvancesFromFederalHomeLoanBanks	5071000000	USD
CY2017Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	1498227000	USD
CY2018Q2	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	1455554000	USD
CY2017Q2	us-gaap	Allowance For Loan And Lease Loss Recovery Of Bad Debts AllowanceForLoanAndLeaseLossRecoveryOfBadDebts	985000	USD
	us-gaap	Allowance For Loan And Lease Loss Recovery Of Bad Debts AllowanceForLoanAndLeaseLossRecoveryOfBadDebts	2037000	USD
CY2018Q2	us-gaap	Allowance For Loan And Lease Loss Recovery Of Bad Debts AllowanceForLoanAndLeaseLossRecoveryOfBadDebts	768000	USD
	us-gaap	Allowance For Loan And Lease Loss Recovery Of Bad Debts AllowanceForLoanAndLeaseLossRecoveryOfBadDebts	934000	USD
CY2017Q2	us-gaap	Allowance For Loan And Lease Losses Write Offs AllowanceForLoanAndLeaseLossesWriteOffs	10237000	USD
	us-gaap	Allowance For Loan And Lease Losses Write Offs AllowanceForLoanAndLeaseLossesWriteOffs	25061000	USD
CY2018Q2	us-gaap	Allowance For Loan And Lease Losses Write Offs AllowanceForLoanAndLeaseLossesWriteOffs	12268000	USD
	us-gaap	Allowance For Loan And Lease Losses Write Offs AllowanceForLoanAndLeaseLossesWriteOffs	22900000	USD
CY2017Q4	us-gaap	Amortization Method Qualified Affordable Housing Project Investments AmortizationMethodQualifiedAffordableHousingProjectInvestments	64000000	USD
CY2018Q2	us-gaap	Amortization Method Qualified Affordable Housing Project Investments AmortizationMethodQualifiedAffordableHousingProjectInvestments	61000000	USD
CY2017Q4	us-gaap	Assets Assets	30346986000	USD
CY2018Q2	us-gaap	Assets Assets	31349571000	USD
CY2017Q4	us-gaap	Assets Fair Value Disclosure Recurring AssetsFairValueDisclosureRecurring	6739196000	USD
CY2018Q2	us-gaap	Assets Fair Value Disclosure Recurring AssetsFairValueDisclosureRecurring	7164790000	USD
CY2017Q4	us-gaap	Available For Sale Securities AvailableForSaleSecurities	6680832000	USD
CY2018Q2	us-gaap	Available For Sale Securities AvailableForSaleSecurities	7030614000	USD
CY2017Q4	us-gaap	Available For Sale Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	98906000	USD
CY2018Q2	us-gaap	Available For Sale Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	64852000	USD
CY2017Q4	us-gaap	Available For Sale Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	5860000	USD
CY2018Q2	us-gaap	Available For Sale Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	33969000	USD
CY2017Q4	us-gaap	Available For Sale Securities Amortized Cost AvailableForSaleSecuritiesAmortizedCost	6587786000	USD
CY2018Q2	us-gaap	Available For Sale Securities Amortized Cost AvailableForSaleSecuritiesAmortizedCost	6999731000	USD
CY2017Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	1314000	USD
CY2018Q2	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	1240000	USD
CY2017Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue	1175013000	USD
CY2018Q2	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue	2627651000	USD
CY2017Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	4546000	USD
CY2018Q2	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	32729000	USD
CY2017Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	1080493000	USD
CY2018Q2	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	2580948000	USD
CY2017Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	94520000	USD
CY2018Q2	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	46703000	USD
CY2018Q2	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost	2374418000	USD
CY2018Q2	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	2384147000	USD
CY2018Q2	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost	3512471000	USD
CY2018Q2	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	3524379000	USD
CY2018Q2	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost	377802000	USD
CY2018Q2	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue	381778000	USD
CY2018Q2	us-gaap	Available For Sale Securities Debt Maturities Within One Year Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost	735040000	USD
CY2018Q2	us-gaap	Available For Sale Securities Debt Maturities Within One Year Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue	740310000	USD
CY2017Q2	us-gaap	Available For Sale Securities Gross Realized Gains AvailableForSaleSecuritiesGrossRealizedGains	656000	USD
CY2018Q2	us-gaap	Available For Sale Securities Gross Realized Gains AvailableForSaleSecuritiesGrossRealizedGains	2554000	USD
	us-gaap	Available For Sale Securities Gross Realized Gains AvailableForSaleSecuritiesGrossRealizedGains	6041000	USD
CY2017Q2	us-gaap	Available For Sale Securities Gross Realized Losses AvailableForSaleSecuritiesGrossRealizedLosses	29000	USD
	us-gaap	Available For Sale Securities Gross Realized Losses AvailableForSaleSecuritiesGrossRealizedLosses	29000	USD
CY2018Q2	us-gaap	Available For Sale Securities Gross Realized Losses AvailableForSaleSecuritiesGrossRealizedLosses	4000	USD
	us-gaap	Available For Sale Securities Gross Realized Losses AvailableForSaleSecuritiesGrossRealizedLosses	2514000	USD
CY2017Q4	us-gaap	Available For Sale Securities Pledged As Collateral AvailableForSaleSecuritiesPledgedAsCollateral	2600000000	USD
CY2018Q2	us-gaap	Available For Sale Securities Pledged As Collateral AvailableForSaleSecuritiesPledgedAsCollateral	2200000000	USD
CY2017Q2	us-gaap	Availableforsale Securities Gross Realized Gain Loss Excluding Other Than Temporary Impairments AvailableforsaleSecuritiesGrossRealizedGainLossExcludingOtherThanTemporaryImpairments	627000	USD
	us-gaap	Availableforsale Securities Gross Realized Gain Loss Excluding Other Than Temporary Impairments AvailableforsaleSecuritiesGrossRealizedGainLossExcludingOtherThanTemporaryImpairments	2263000	USD
CY2018Q2	us-gaap	Availableforsale Securities Gross Realized Gain Loss Excluding Other Than Temporary Impairments AvailableforsaleSecuritiesGrossRealizedGainLossExcludingOtherThanTemporaryImpairments	2550000	USD
	us-gaap	Availableforsale Securities Gross Realized Gain Loss Excluding Other Than Temporary Impairments AvailableforsaleSecuritiesGrossRealizedGainLossExcludingOtherThanTemporaryImpairments	3527000	USD
CY2018Q2	us-gaap	Availableforsale Securities In Unrealized Loss Positions Qualitative Disclosure Number Of Positions1 AvailableforsaleSecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions1	147	security
CY2017Q4	us-gaap	Bank Owned Life Insurance BankOwnedLifeInsurance	252462000	USD
CY2018Q2	us-gaap	Bank Owned Life Insurance BankOwnedLifeInsurance	261758000	USD
CY2016Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	448313000	USD
CY2017Q2	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	228360000	USD
CY2017Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	194582000	USD
CY2018Q2	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	379256000	USD
	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	-219953000	USD
	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	184674000	USD
CY2017Q4	us-gaap	Cash And Due From Banks CashAndDueFromBanks	35246000	USD
CY2018Q2	us-gaap	Cash And Due From Banks CashAndDueFromBanks	10937000	USD
CY2017Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2018Q2	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
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	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.42
CY2018Q2	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.21
	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.42
CY2017Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2018Q2	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2017Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	400000000	shares
CY2018Q2	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	400000000	shares
CY2017Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	106848185	shares
CY2018Q2	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	106241116	shares
CY2017Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	106848185	shares
CY2018Q2	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	106241116	shares
CY2017Q4	us-gaap	Common Stock Value CommonStockValue	1068000	USD
CY2018Q2	us-gaap	Common Stock Value CommonStockValue	1062000	USD
CY2017Q2	us-gaap	Communications And Information Technology CommunicationsAndInformationTechnology	3745000	USD
	us-gaap	Communications And Information Technology CommunicationsAndInformationTechnology	7029000	USD
CY2018Q2	us-gaap	Communications And Information Technology CommunicationsAndInformationTechnology	3900000	USD
	us-gaap	Communications And Information Technology CommunicationsAndInformationTechnology	7585000	USD
CY2017Q2	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	67078000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	146738000	USD
CY2018Q2	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	84230000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	161907000	USD
	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	24983000	USD
	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	24074000	USD
CY2017Q4	us-gaap	Deposits Deposits	21878479000	USD
CY2018Q2	us-gaap	Deposits Deposits	22177950000	USD
CY2017Q4	us-gaap	Deposits Savings Deposits DepositsSavingsDeposits	10715024000	USD
CY2018Q2	us-gaap	Derivative Liabilities DerivativeLiabilities	1000	USD
CY2017Q4	us-gaap	Derivative Liability Collateral Right To Reclaim Cash Offset DerivativeLiabilityCollateralRightToReclaimCashOffset	0	USD
CY2018Q2	us-gaap	Deposits Savings Deposits DepositsSavingsDeposits	10590438000	USD
	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	29837000	USD
	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	31391000	USD
CY2017Q4	us-gaap	Derivative Asset Collateral Obligation To Return Cash Offset DerivativeAssetCollateralObligationToReturnCashOffset	0	USD
CY2018Q2	us-gaap	Derivative Asset Collateral Obligation To Return Cash Offset DerivativeAssetCollateralObligationToReturnCashOffset	0	USD
CY2017Q4	us-gaap	Derivative Asset Fair Value Gross Liability DerivativeAssetFairValueGrossLiability	7996000	USD
CY2018Q2	us-gaap	Derivative Asset Fair Value Gross Liability DerivativeAssetFairValueGrossLiability	4294000	USD
CY2017Q4	us-gaap	Derivative Asset Fair Value Of Collateral DerivativeAssetFairValueOfCollateral	5221000	USD
CY2018Q2	us-gaap	Derivative Asset Fair Value Of Collateral DerivativeAssetFairValueOfCollateral	25114000	USD
CY2017Q4	us-gaap	Derivative Assets DerivativeAssets	0	USD
CY2018Q2	us-gaap	Derivative Assets DerivativeAssets	396000	USD
CY2017Q4	us-gaap	Derivative Assets Liabilities At Fair Value Net DerivativeAssetsLiabilitiesAtFairValueNet	-215000	USD
CY2018Q2	us-gaap	Derivative Assets Liabilities At Fair Value Net DerivativeAssetsLiabilitiesAtFairValueNet	395000	USD
CY2018Q2	us-gaap	Derivative Collateral Obligation To Return Securities DerivativeCollateralObligationToReturnSecurities	25000000	USD
CY2017Q4	us-gaap	Derivative Fair Value Of Derivative Asset DerivativeFairValueOfDerivativeAsset	13217000	USD
CY2018Q2	us-gaap	Derivative Fair Value Of Derivative Asset DerivativeFairValueOfDerivativeAsset	29804000	USD
CY2017Q4	us-gaap	Derivative Fair Value Of Derivative Asset Amount Not Offset Against Collateral DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral	13217000	USD
CY2018Q2	us-gaap	Derivative Fair Value Of Derivative Asset Amount Not Offset Against Collateral DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral	29804000	USD
CY2017Q4	us-gaap	Derivative Fair Value Of Derivative Liability DerivativeFairValueOfDerivativeLiability	13173000	USD
CY2018Q2	us-gaap	Derivative Fair Value Of Derivative Liability DerivativeFairValueOfDerivativeLiability	5143000	USD
CY2017Q4	us-gaap	Derivative Fair Value Of Derivative Liability Amount Not Offset Against Collateral DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral	13173000	USD
CY2018Q2	us-gaap	Derivative Fair Value Of Derivative Liability Amount Not Offset Against Collateral DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral	5143000	USD
CY2017Q4	us-gaap	Derivative Liabilities DerivativeLiabilities	215000	USD
CY2018Q2	us-gaap	Derivative Liability Collateral Right To Reclaim Cash Offset DerivativeLiabilityCollateralRightToReclaimCashOffset	0	USD
CY2017Q4	us-gaap	Derivative Liability Fair Value Gross Asset DerivativeLiabilityFairValueGrossAsset	7996000	USD
CY2018Q2	us-gaap	Derivative Liability Fair Value Gross Asset DerivativeLiabilityFairValueGrossAsset	4294000	USD
CY2017Q4	us-gaap	Derivative Liability Fair Value Of Collateral DerivativeLiabilityFairValueOfCollateral	4962000	USD
CY2018Q2	us-gaap	Derivative Liability Fair Value Of Collateral DerivativeLiabilityFairValueOfCollateral	848000	USD
	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	46073000	USD
	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	45857000	USD
CY2017Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.60
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CY2018Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.82
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CY2017Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.60
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CY2018Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.82
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.59
CY2017Q2	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.304
	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.306
CY2018Q2	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.232
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	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	0.21
	us-gaap	Employee Service Share Based Compensation Tax Benefit From Exercise Of Stock Options EmployeeServiceShareBasedCompensationTaxBenefitFromExerciseOfStockOptions	3800000	USD
	us-gaap	Employee Service Share Based Compensation Tax Benefit From Exercise Of Stock Options EmployeeServiceShareBasedCompensationTaxBenefitFromExerciseOfStockOptions	1100000	USD
CY2017Q4	us-gaap	Fdic Indemnification Asset FDICIndemnificationAsset	295635000	USD
CY2018Q2	us-gaap	Fdic Indemnification Asset FDICIndemnificationAsset	200783000	USD
CY2017Q2	us-gaap	Fdic Indemnification Asset Accretion Of Discount FDICIndemnificationAssetAccretionOfDiscount	45663000	USD
	us-gaap	Fdic Indemnification Asset Accretion Of Discount FDICIndemnificationAssetAccretionOfDiscount	90126000	USD
CY2017	us-gaap	Fdic Indemnification Asset Accretion Of Discount FDICIndemnificationAssetAccretionOfDiscount	176466000	USD
CY2018Q2	us-gaap	Fdic Indemnification Asset Accretion Of Discount FDICIndemnificationAssetAccretionOfDiscount	44250000	USD
	us-gaap	Fdic Indemnification Asset Accretion Of Discount FDICIndemnificationAssetAccretionOfDiscount	84597000	USD
CY2017	us-gaap	Fdic Indemnification Asset Cash Payments Received FDICIndemnificationAssetCashPaymentsReceived	21589000	USD
	us-gaap	Fdic Indemnification Asset Cash Payments Received FDICIndemnificationAssetCashPaymentsReceived	5240000	USD
CY2017Q2	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	5588000	USD
	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	11063000	USD
CY2018Q2	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	4623000	USD
	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	9435000	USD
CY2017Q4	us-gaap	Federal Home Loan Bank Stock And Federal Reserve Bank Stock FederalHomeLoanBankStockAndFederalReserveBankStock	265989000	USD
CY2018Q2	us-gaap	Federal Home Loan Bank Stock And Federal Reserve Bank Stock FederalHomeLoanBankStockAndFederalReserveBankStock	278739000	USD
CY2017Q2	us-gaap	Fees And Commissions FeesAndCommissions	3252000	USD
	us-gaap	Fees And Commissions FeesAndCommissions	6455000	USD
CY2018Q2	us-gaap	Fees And Commissions FeesAndCommissions	3510000	USD
	us-gaap	Fees And Commissions FeesAndCommissions	6997000	USD
CY2016Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	152953000	USD
CY2017Q1	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	151281000	USD
CY2017Q2	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	155648000	USD
CY2017Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	144795000	USD
CY2018Q1	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	137476000	USD
CY2018Q2	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	134971000	USD
CY2017Q4	us-gaap	Financing Receivable Recorded Investment Current FinancingReceivableRecordedInvestmentCurrent	20840121000	USD
CY2018Q2	us-gaap	Financing Receivable Recorded Investment Current FinancingReceivableRecordedInvestmentCurrent	21268413000	USD
CY2017Q4	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	170065000	USD
CY2018Q2	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	184253000	USD
CY2017Q2	us-gaap	Gain Loss On Investments GainLossOnInvestments	627000	USD
	us-gaap	Gain Loss On Investments GainLossOnInvestments	2263000	USD
CY2018Q2	us-gaap	Gain Loss On Investments GainLossOnInvestments	2142000	USD
	us-gaap	Gain Loss On Investments GainLossOnInvestments	2506000	USD
CY2017Q2	us-gaap	Gain Loss On Sale Of Loans And Leases GainLossOnSaleOfLoansAndLeases	-404000	USD
	us-gaap	Gain Loss On Sale Of Loans And Leases GainLossOnSaleOfLoansAndLeases	4154000	USD
CY2018Q2	us-gaap	Gain Loss On Sale Of Loans And Leases GainLossOnSaleOfLoansAndLeases	768000	USD
	us-gaap	Gain Loss On Sale Of Loans And Leases GainLossOnSaleOfLoansAndLeases	4269000	USD
CY2017Q4	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	10000000	USD
CY2018Q2	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	10000000	USD
CY2017Q2	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	212831000	USD
	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	199527000	USD
CY2018Q2	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	177550000	USD
	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	177395000	USD
CY2017Q2	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	4400000	USD
	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	6300000	USD
CY2018Q2	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	4366000	USD
CY2017Q4	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	174940000	USD
CY2018Q2	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	175552000	USD
CY2017Q4	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	18839000	USD
CY2018Q2	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	20799000	USD
CY2017Q4	us-gaap	Impaired Financing Receivable Unpaid Principal Balance ImpairedFinancingReceivableUnpaidPrincipalBalance	174865000	USD
CY2018Q2	us-gaap	Impaired Financing Receivable Unpaid Principal Balance ImpairedFinancingReceivableUnpaidPrincipalBalance	175428000	USD
CY2017Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	95428000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	185508000	USD
CY2018Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	116994000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	227825000	USD
CY2017Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	29021000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	56808000	USD
CY2018Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	27094000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	52690000	USD
	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	41298000	USD
	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	18677000	USD
	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	1286950000	USD
	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	299471000	USD
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	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	25242000	USD
CY2017Q4	us-gaap	Intangible Assets Net Including Goodwill IntangibleAssetsNetIncludingGoodwill	77796000	USD
CY2018Q2	us-gaap	Intangible Assets Net Including Goodwill IntangibleAssetsNetIncludingGoodwill	77740000	USD
CY2017Q2	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	298835000	USD
	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	582373000	USD
CY2018Q2	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	348855000	USD
	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	676631000	USD
CY2017Q2	us-gaap	Interest And Dividend Income Securities InterestAndDividendIncomeSecurities	46054000	USD
	us-gaap	Interest And Dividend Income Securities InterestAndDividendIncomeSecurities	89773000	USD
CY2018Q2	us-gaap	Interest And Dividend Income Securities InterestAndDividendIncomeSecurities	56092000	USD
	us-gaap	Interest And Dividend Income Securities InterestAndDividendIncomeSecurities	106077000	USD
CY2017Q2	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	249409000	USD
	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	485771000	USD
CY2018Q2	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	288264000	USD
	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	562264000	USD
CY2017Q4	us-gaap	Interest Bearing Deposits In Banks InterestBearingDepositsInBanks	159336000	USD
CY2018Q2	us-gaap	Interest Bearing Deposits In Banks InterestBearingDepositsInBanks	368319000	USD
CY2017Q4	us-gaap	Interest Bearing Domestic Deposit Demand InterestBearingDomesticDepositDemand	1757581000	USD
CY2018Q2	us-gaap	Interest Bearing Domestic Deposit Demand InterestBearingDomesticDepositDemand	1621940000	USD
CY2017Q2	us-gaap	Interest Expense InterestExpense	59246000	USD
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CY2018Q2	us-gaap	Interest Expense InterestExpense	93592000	USD
	us-gaap	Interest Expense InterestExpense	173559000	USD
CY2017Q2	us-gaap	Interest Expense Borrowings InterestExpenseBorrowings	19732000	USD
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CY2018Q2	us-gaap	Interest Expense Borrowings InterestExpenseBorrowings	28294000	USD
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CY2017Q2	us-gaap	Interest Expense Deposits InterestExpenseDeposits	39514000	USD
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CY2018Q2	us-gaap	Interest Expense Deposits InterestExpenseDeposits	65298000	USD
	us-gaap	Interest Expense Deposits InterestExpenseDeposits	121659000	USD
CY2017Q2	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	225970000	USD
	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	444463000	USD
CY2018Q2	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	246268000	USD
	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	490930000	USD
CY2017Q2	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	239589000	USD
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CY2018Q2	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	255263000	USD
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	us-gaap	Interest Paid Net InterestPaidNet	108036000	USD
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CY2018Q2	us-gaap	Interest Rate Cash Flow Hedge Gain Loss To Be Reclassified During Next12 Months Net InterestRateCashFlowHedgeGainLossToBeReclassifiedDuringNext12MonthsNet	-8000000	USD
CY2017Q4	us-gaap	Interest Rate Derivative Assets At Fair Value InterestRateDerivativeAssetsAtFairValue	27627000	USD
CY2018Q2	us-gaap	Interest Rate Derivative Assets At Fair Value InterestRateDerivativeAssetsAtFairValue	35807000	USD
CY2017Q4	us-gaap	Interest Rate Derivative Liabilities At Fair Value InterestRateDerivativeLiabilitiesAtFairValue	25373000	USD
CY2018Q2	us-gaap	Interest Rate Derivative Liabilities At Fair Value InterestRateDerivativeLiabilitiesAtFairValue	34810000	USD
CY2017Q4	us-gaap	Investments Investments	6690832000	USD
CY2018Q2	us-gaap	Investments Investments	7103068000	USD
CY2017Q4	us-gaap	Investments Fair Value Disclosure InvestmentsFairValueDisclosure	6690832000	USD
CY2018Q2	us-gaap	Investments Fair Value Disclosure InvestmentsFairValueDisclosure	7103068000	USD
CY2017Q2	us-gaap	Labor And Related Expense LaborAndRelatedExpense	60388000	USD
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CY2018Q2	us-gaap	Labor And Related Expense LaborAndRelatedExpense	65537000	USD
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CY2017Q4	us-gaap	Liabilities Liabilities	27320924000	USD
CY2018Q2	us-gaap	Liabilities Liabilities	28250138000	USD
CY2017Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	30346986000	USD
CY2018Q2	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	31349571000	USD
CY2017Q4	us-gaap	Liabilities Fair Value Disclosure Recurring LiabilitiesFairValueDisclosureRecurring	25373000	USD
CY2018Q2	us-gaap	Liabilities Fair Value Disclosure Recurring LiabilitiesFairValueDisclosureRecurring	34810000	USD
CY2017Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	144537000	USD
CY2018Q2	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	134381000	USD
CY2017Q4	us-gaap	Loans And Leases Receivable Deferred Income LoansAndLeasesReceivableDeferredIncome	-48165000	USD
CY2018Q2	us-gaap	Loans And Leases Receivable Deferred Income LoansAndLeasesReceivableDeferredIncome	-45817000	USD
CY2017Q4	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	20865221000	USD
CY2018Q2	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	21372556000	USD
CY2017Q2	us-gaap	Loans And Leases Receivable Impaired Interest Lost On Nonaccrual Loans LoansAndLeasesReceivableImpairedInterestLostOnNonaccrualLoans	1377000	USD
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CY2018Q2	us-gaap	Loans And Leases Receivable Impaired Interest Lost On Nonaccrual Loans LoansAndLeasesReceivableImpairedInterestLostOnNonaccrualLoans	1805000	USD
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CY2017Q4	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	20913386000	USD
CY2018Q2	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	21418373000	USD
CY2017Q4	us-gaap	Loans And Leases Receivable Net Reported Amount LoansAndLeasesReceivableNetReportedAmount	20768849000	USD
CY2018Q2	us-gaap	Loans And Leases Receivable Net Reported Amount LoansAndLeasesReceivableNetReportedAmount	21283992000	USD
CY2017Q4	us-gaap	Loans And Leases Receivable Net Reported Amount Covered And Not Covered LoansAndLeasesReceivableNetReportedAmountCoveredAndNotCovered	21271709000	USD
CY2018Q2	us-gaap	Loans And Leases Receivable Net Reported Amount Covered And Not Covered LoansAndLeasesReceivableNetReportedAmountCoveredAndNotCovered	21734752000	USD
CY2017Q4	us-gaap	Loans Receivable Held For Sale Net Not Part Of Disposal Group LoansReceivableHeldForSaleNetNotPartOfDisposalGroup	34097000	USD
CY2018Q2	us-gaap	Loans Receivable Held For Sale Net Not Part Of Disposal Group LoansReceivableHeldForSaleNetNotPartOfDisposalGroup	46829000	USD
CY2017Q4	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	402830000	USD
CY2018Q2	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	402799000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	1025881000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	528680000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-1374771000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-573900000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	128937000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	229894000	USD
CY2017Q2	us-gaap	Net Income Loss NetIncomeLoss	66407000	USD
	us-gaap	Net Income Loss NetIncomeLoss	128700000	USD
CY2018Q2	us-gaap	Net Income Loss NetIncomeLoss	89900000	USD
	us-gaap	Net Income Loss NetIncomeLoss	175135000	USD
CY2017Q2	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	63924000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	123895000	USD
CY2018Q2	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	86437000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	168459000	USD
CY2017Q2	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	63931000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	123910000	USD
CY2018Q2	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	86449000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	168482000	USD
	us-gaap	Noncash Or Part Noncash Acquisition Investments Acquired1 NoncashOrPartNoncashAcquisitionInvestmentsAcquired1	0	USD
	us-gaap	Noncash Or Part Noncash Acquisition Investments Acquired1 NoncashOrPartNoncashAcquisitionInvestmentsAcquired1	272500000	USD
CY2017Q4	us-gaap	Noninterest Bearing Domestic Deposit Demand NoninterestBearingDomesticDepositDemand	3071032000	USD
CY2018Q2	us-gaap	Noninterest Bearing Domestic Deposit Demand NoninterestBearingDomesticDepositDemand	3315550000	USD
CY2017Q2	us-gaap	Noninterest Expense NoninterestExpense	160435000	USD
	us-gaap	Noninterest Expense NoninterestExpense	316992000	USD
CY2018Q2	us-gaap	Noninterest Expense NoninterestExpense	161247000	USD
	us-gaap	Noninterest Expense NoninterestExpense	323064000	USD
CY2017Q2	us-gaap	Noninterest Income NoninterestIncome	29893000	USD
	us-gaap	Noninterest Income NoninterestIncome	58037000	USD
CY2018Q2	us-gaap	Noninterest Income NoninterestIncome	31973000	USD
	us-gaap	Noninterest Income NoninterestIncome	59959000	USD
CY2017Q2	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	7504000	USD
	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	12055000	USD
CY2018Q2	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	5223000	USD
	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	12053000	USD
CY2017Q2	us-gaap	Occupancy Net OccupancyNet	19251000	USD
	us-gaap	Occupancy Net OccupancyNet	37860000	USD
CY2018Q2	us-gaap	Occupancy Net OccupancyNet	18985000	USD
	us-gaap	Occupancy Net OccupancyNet	37817000	USD
CY2018Q2	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	90000000	USD
CY2017Q2	us-gaap	Operating Leases Income Statement Depreciation Expense On Property Subject To Or Held For Lease OperatingLeasesIncomeStatementDepreciationExpenseOnPropertySubjectToOrHeldForLease	8733000	USD
	us-gaap	Operating Leases Income Statement Depreciation Expense On Property Subject To Or Held For Lease OperatingLeasesIncomeStatementDepreciationExpenseOnPropertySubjectToOrHeldForLease	16750000	USD
CY2018Q2	us-gaap	Operating Leases Income Statement Depreciation Expense On Property Subject To Or Held For Lease OperatingLeasesIncomeStatementDepreciationExpenseOnPropertySubjectToOrHeldForLease	9476000	USD
	us-gaap	Operating Leases Income Statement Depreciation Expense On Property Subject To Or Held For Lease OperatingLeasesIncomeStatementDepreciationExpenseOnPropertySubjectToOrHeldForLease	18792000	USD
CY2017Q2	us-gaap	Operating Leases Income Statement Lease Revenue OperatingLeasesIncomeStatementLeaseRevenue	13141000	USD
	us-gaap	Operating Leases Income Statement Lease Revenue OperatingLeasesIncomeStatementLeaseRevenue	26780000	USD
CY2018Q2	us-gaap	Operating Leases Income Statement Lease Revenue OperatingLeasesIncomeStatementLeaseRevenue	17492000	USD
	us-gaap	Operating Leases Income Statement Lease Revenue OperatingLeasesIncomeStatementLeaseRevenue	31594000	USD
CY2017Q4	us-gaap	Other Assets OtherAssets	664382000	USD
CY2018Q2	us-gaap	Other Assets OtherAssets	675379000	USD
CY2017Q2	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax	12748000	USD
	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax	37851000	USD
CY2018Q2	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax	-20382000	USD
	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax	-58534000	USD
CY2017Q2	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	7713000	USD
	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	22900000	USD
CY2018Q2	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-14981000	USD
	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-43022000	USD
CY2017Q2	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax	5035000	USD
	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax	14951000	USD
CY2018Q2	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax	-5401000	USD
	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax	-15512000	USD
CY2017Q2	us-gaap	Other Comprehensive Income Loss Before Tax OtherComprehensiveIncomeLossBeforeTax	1107000	USD
	us-gaap	Other Comprehensive Income Loss Before Tax OtherComprehensiveIncomeLossBeforeTax	29814000	USD
CY2018Q2	us-gaap	Other Comprehensive Income Loss Before Tax OtherComprehensiveIncomeLossBeforeTax	-7714000	USD
	us-gaap	Other Comprehensive Income Loss Before Tax OtherComprehensiveIncomeLossBeforeTax	-17998000	USD
CY2017Q2	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Before Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesBeforeTax	-11641000	USD
	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Before Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesBeforeTax	-8037000	USD
CY2018Q2	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Before Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesBeforeTax	12668000	USD
	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Before Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesBeforeTax	40536000	USD
CY2017Q2	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Net Of Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax	-7042000	USD
	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Net Of Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax	-4862000	USD
CY2018Q2	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Net Of Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax	9311000	USD
	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Net Of Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax	29794000	USD
CY2017Q2	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesTax	-4599000	USD
	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesTax	-3175000	USD
CY2018Q2	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesTax	3357000	USD
	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesTax	10742000	USD
CY2017Q2	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	671000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	18038000	USD
CY2018Q2	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-5670000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-13228000	USD
CY2017Q2	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	627000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	2263000	USD
CY2018Q2	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	2551000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	3527000	USD
CY2017Q2	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	379000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	1369000	USD
CY2018Q2	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	1875000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	2592000	USD
CY2017Q2	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	248000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	894000	USD
CY2018Q2	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	676000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	935000	USD
CY2017Q2	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesBeforeTax	-2571000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesBeforeTax	-5462000	USD
CY2018Q2	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesBeforeTax	728000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesBeforeTax	-211000	USD
CY2017Q2	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax	-1556000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax	-3305000	USD
CY2018Q2	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax	535000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax	-155000	USD
CY2017Q2	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesTax	-1015000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesTax	-2157000	USD
CY2018Q2	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesTax	193000	USD

bku

Discontinuation Cash Flow Hedge Notional Amount

DiscontinuationCashFlowHedgeNotionalAmount

0

USD

us-gaap

Available For Sale Securities Gross Realized Gains

AvailableForSaleSecuritiesGrossRealizedGains

2292000

USD

bku

Amortization Accretion Of Discounts And Premiums

AmortizationAccretionOfDiscountsAndPremiums

49408000

USD

bku

Amortization Accretion Of Discounts And Premiums

AmortizationAccretionOfDiscountsAndPremiums

69157000

USD

bku

Amountsreclassifiedfrom Aoc Iintoearningsasaresultofdiscontinuationofcashflowhedgesorearlyextinguishmentofdebt

AmountsreclassifiedfromAOCIintoearningsasaresultofdiscontinuationofcashflowhedgesorearlyextinguishmentofdebt

0

USD

bku

Amountsreclassifiedfrom Aoc Iintoearningsasaresultofdiscontinuationofcashflowhedgesorearlyextinguishmentofdebt

AmountsreclassifiedfromAOCIintoearningsasaresultofdiscontinuationofcashflowhedgesorearlyextinguishmentofdebt

0

USD

CY2018Q2

bku

Availableforsalesecurities Gross Unrealized Loss Considered Insignificantfor Otti Analysis

AvailableforsalesecuritiesGrossUnrealizedLossConsideredInsignificantforOTTIAnalysis

313000

USD

CY2018Q2

bku

Derivative Asset Liability Fair Value Of Collateral

DerivativeAssetLiabilityFairValueOfCollateral

24266000

USD

bku

Discontinuation Cash Flow Hedge Notional Amount

DiscontinuationCashFlowHedgeNotionalAmount

0

USD

CY2018Q2

bku

Branches Located In New York

BranchesLocatedInNewYork

5

banking_center

CY2017Q4

bku

Derivative Asset Liability Collateral Offset

DerivativeAssetLiabilityCollateralOffset

0

USD

CY2018Q2

bku

Derivative Asset Liability Collateral Offset

DerivativeAssetLiabilityCollateralOffset

0

USD

CY2017Q4

bku

Derivative Asset Liability Fair Value Amount Not Offset Against Collateral

DerivativeAssetLiabilityFairValueAmountNotOffsetAgainstCollateral

44000

USD

CY2018Q2

bku

Derivative Asset Liability Fair Value Amount Not Offset Against Collateral

DerivativeAssetLiabilityFairValueAmountNotOffsetAgainstCollateral

24661000

USD

CY2017Q4

bku

Derivative Asset Liability Fair Value Gross Liability Asset

DerivativeAssetLiabilityFairValueGrossLiabilityAsset

0

USD

CY2018Q2

bku

Derivative Asset Liability Fair Value Gross Liability Asset

DerivativeAssetLiabilityFairValueGrossLiabilityAsset

0

USD

CY2017Q4

bku

Derivative Asset Liability Fair Value Of Collateral

DerivativeAssetLiabilityFairValueOfCollateral

259000

USD

CY2018Q2

bku

Dividend Equivalent Rights

DividendEquivalentRights

3023314

shares

bku

Dividends Declared And Payable

DividendsDeclaredAndPayable

23034000

USD

bku

Dividends Declared And Payable

DividendsDeclaredAndPayable

22916000

USD

bku

Effective Duration Of Investment Portfolio

EffectiveDurationOfInvestmentPortfolio

P1Y6M4D

CY2016Q4

bku

Fdic Indemnification Assetand Liabilitynet

FDICIndemnificationAssetandLiabilitynet

515910000

USD

CY2017Q4

bku

Fdic Indemnification Assetand Liabilitynet

FDICIndemnificationAssetandLiabilitynet

295635000

USD

CY2018Q2

bku

Fdic Indemnification Assetand Liabilitynet

FDICIndemnificationAssetandLiabilitynet

200783000

USD

CY2017

bku

Fair Value Assets Level Transfers Amount

FairValueAssetsLevelTransfersAmount

0

USD

bku

Fair Value Assets Level Transfers Amount

FairValueAssetsLevelTransfersAmount

0

USD

bku

Fair Value Inputs Averagefarepertrip Taxi Medallion

FairValueInputsAveragefarepertripTaxiMedallion

16.02

USD

bku

Fair Value Inputs Days Workedper Month Taxi Medallion

FairValueInputsDaysWorkedperMonthTaxiMedallion

25.8

bku

Fair Value Inputs Numberoftripspershift Taxi Medallion

FairValueInputsNumberoftripspershiftTaxiMedallion

15.7

bku

Fair Value Inputs Second Shift Rental Achievement Rate Taxi Medallion

FairValueInputsSecondShiftRentalAchievementRateTaxiMedallion

0.548

CY2018Q2

bku

Financialcollateralpledgedforinterestrateswaps

38000000

USD

CY2017Q2

bku

Gain Loss On Indemnification Asset

GainLossOnIndemnificationAsset

-2588000

USD

bku

Gain Loss On Indemnification Asset

GainLossOnIndemnificationAsset

-9336000

USD

CY2017

bku

Gain Loss On Indemnification Asset

GainLossOnIndemnificationAsset

-22220000

USD

CY2018Q2

bku

Gain Loss On Indemnification Asset

GainLossOnIndemnificationAsset

-1400000

USD

bku

Gain Loss On Indemnification Asset

GainLossOnIndemnificationAsset

-5015000

USD

CY2017Q2

bku

Gain Lossonindemnificationassetfromcoveredloanssold

GainLossonindemnificationassetfromcoveredloanssold

2759000

USD

bku

Gain Lossonindemnificationassetfromcoveredloanssold

GainLossonindemnificationassetfromcoveredloanssold

1257000

USD

CY2018Q2

bku

Gain Lossonindemnificationassetfromcoveredloanssold

GainLossonindemnificationassetfromcoveredloanssold

1601000

USD

bku

Gain Lossonindemnificationassetfromcoveredloanssold

GainLossonindemnificationassetfromcoveredloanssold

243000

USD

CY2017Q4

bku

Gross Amounts Recognized Derivative Assets And Liabilities

GrossAmountsRecognizedDerivativeAssetsAndLiabilities

44000

USD

CY2018Q2

bku

Gross Amounts Recognized Derivative Assets And Liabilities

GrossAmountsRecognizedDerivativeAssetsAndLiabilities

24661000

USD

CY2017Q2

bku

Income Loss From Resolution Of Covered Assets

IncomeLossFromResolutionOfCoveredAssets

8361000

USD

bku

Income Loss From Resolution Of Covered Assets

IncomeLossFromResolutionOfCoveredAssets

15666000

USD

CY2018Q2

bku

Income Loss From Resolution Of Covered Assets

IncomeLossFromResolutionOfCoveredAssets

4238000

USD

bku

Income Loss From Resolution Of Covered Assets

IncomeLossFromResolutionOfCoveredAssets

7555000

USD

CY2018Q2

bku

Interestratederivativecontractscentrallyclearedthroughthe Cme

InterestratederivativecontractscentrallyclearedthroughtheCME

0

USD

CY2017Q4

bku

Investmentsecuritiesrecordedatfairvalue

6680832

USD

CY2018Q2

bku

Investmentsecuritiesrecordedatfairvalue

7093068

USD

CY2017Q4

bku

Loans And Leases Receivable Allowance Covered And Not Covered

LoansAndLeasesReceivableAllowanceCoveredAndNotCovered

144795000

USD

CY2018Q2

bku

Loans And Leases Receivable Allowance Covered And Not Covered

LoansAndLeasesReceivableAllowanceCoveredAndNotCovered

134971000

USD

CY2017Q4

bku

Loans And Leases Receivable Deferred Income Covered And Not Covered

LoansAndLeasesReceivableDeferredIncomeCoveredAndNotCovered

-45017000

USD

CY2017Q4

bku

Loans And Leases Receivable Net Of Deferred Income Covered

LoansAndLeasesReceivableNetOfDeferredIncomeCovered

503118000

USD

CY2017Q4

bku

Number Of Held To Maturity Securities

NumberOfHeldToMaturitySecurities

1

security

CY2018Q2

bku

Loans And Leases Receivable Deferred Income Covered And Not Covered

LoansAndLeasesReceivableDeferredIncomeCoveredAndNotCovered

-42257000

USD

CY2018Q2

bku

Loans And Leases Receivable Net Of Deferred Income Covered

LoansAndLeasesReceivableNetOfDeferredIncomeCovered

451350000

USD

CY2018Q2

bku

Number Of Geographic Areas Branches Located In

NumberOfGeographicAreasBranchesLocatedIn

15

county

CY2017Q4

bku

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

LoansAndLeasesReceivableNetOfDeferredIncomeCoveredAndNotCovered

21416504000

USD

CY2018Q2

bku

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

LoansAndLeasesReceivableNetOfDeferredIncomeCoveredAndNotCovered

21869723000

USD

CY2017Q4

bku

Loansand Leases Receivable Gross Coveredand Non Covered

LoansandLeasesReceivableGrossCoveredandNonCovered

21371487000

USD

CY2018Q2

bku

Loansand Leases Receivable Gross Coveredand Non Covered

LoansandLeasesReceivableGrossCoveredandNonCovered

21827466000

USD

CY2009Q2

bku

Maximum Amount Fdic Will Reimburse

MaximumAmountFDICWillReimburse

4000000000.0

USD

CY2018Q2

bku

Number Of Branches

NumberOfBranches

87

branch

CY2018Q2

bku

Number Of Held To Maturity Securities

NumberOfHeldToMaturitySecurities

1

security

CY2009Q2

bku

Number Of Loss Sharing Agreements

NumberOfLossSharingAgreements

2

CY2018Q2

bku

Number Of Securities Amount Of Impairment Insignificant

NumberOfSecuritiesAmountOfImpairmentInsignificant

32

security

CY2017Q2

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

CY2018Q2

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

CY2017Q4

bku

Percent Of Total Loans

PercentOfTotalLoans

1.000

CY2018Q2

bku

Percent Of Total Loans

PercentOfTotalLoans

1.000

bku

Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Date Of Grant Closing Price Maximum

ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodDateOfGrantClosingPriceMaximum

40.84

bku

Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Date Of Grant Closing Price Maximum

ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodDateOfGrantClosingPriceMaximum

42.80

bku

Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Date Of Grant Closing Price Minimum

ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodDateOfGrantClosingPriceMinimum

34.41

bku

Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Date Of Grant Closing Price Minimum

ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodDateOfGrantClosingPriceMinimum

40.28

bku

Sharebased Compensation Arrangement By Sharebased Payment Award Equity Instruments Other Than Options Aggregate Grant Date Fair Value Vested

SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateGrantDateFairValueVested

17142000

USD

bku

Sharebased Compensation Arrangement By Sharebased Payment Award Equity Instruments Other Than Options Aggregate Grant Date Fair Value Vested

SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateGrantDateFairValueVested

17825000

USD

CY2017Q4

bku

Unpaid Principal Balance Of Aci Loans

UnpaidPrincipalBalanceOfAciLoans

1100000000

USD

CY2018Q2

bku

Unpaid Principal Balance Of Aci Loans

UnpaidPrincipalBalanceOfAciLoans

900000000

USD

CY2018Q2

bku

Value Of Pledged Real Estate Loans With Unpaid Principal Balance

ValueOfPledgedRealEstateLoansWithUnpaidPrincipalBalance

10300000000

USD

bku

Weighted Average Life Of Investment Portfolio

WeightedAverageLifeOfInvestmentPortfolio

P4Y9M7D

dei

Amendment Flag

AmendmentFlag

false

dei

Current Fiscal Year End Date

CurrentFiscalYearEndDate

--12-31

dei

Document Fiscal Period Focus

DocumentFiscalPeriodFocus

Q2

dei

Document Fiscal Year Focus

DocumentFiscalYearFocus

2018

dei

Document Period End Date

DocumentPeriodEndDate

2018-06-30

dei

Document Type

DocumentType

10-Q

dei

Entity Central Index Key

EntityCentralIndexKey

0001504008

CY2018Q3

dei

Entity Common Stock Shares Outstanding

EntityCommonStockSharesOutstanding

105352328

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

CY2017Q4

invest

Derivative Notional Amount

DerivativeNotionalAmount

4392790000

USD

CY2018Q2

invest

Derivative Notional Amount

DerivativeNotionalAmount

4481040000

USD

CY2016Q4

us-gaap

Accumulated Other Comprehensive Income Loss Net Of Tax

AccumulatedOtherComprehensiveIncomeLossNetOfTax

41247000

USD

CY2017Q2

us-gaap

Accumulated Other Comprehensive Income Loss Net Of Tax

AccumulatedOtherComprehensiveIncomeLossNetOfTax

59285000

USD

CY2017Q4

us-gaap

Accumulated Other Comprehensive Income Loss Net Of Tax

AccumulatedOtherComprehensiveIncomeLossNetOfTax

54986000

USD

CY2018Q2

us-gaap

Accumulated Other Comprehensive Income Loss Net Of Tax

AccumulatedOtherComprehensiveIncomeLossNetOfTax

50660000

USD

CY2017Q4

us-gaap

Advances From Federal Home Loan Banks

AdvancesFromFederalHomeLoanBanks

4771000000

USD

CY2018Q2

us-gaap

Advances From Federal Home Loan Banks

AdvancesFromFederalHomeLoanBanks

5071000000

USD

CY2017Q4

us-gaap

Additional Paid In Capital

AdditionalPaidInCapital

1498227000

USD

CY2018Q2

us-gaap

Additional Paid In Capital

AdditionalPaidInCapital

1455554000

USD

CY2017Q2

us-gaap

Allowance For Loan And Lease Loss Recovery Of Bad Debts

AllowanceForLoanAndLeaseLossRecoveryOfBadDebts

985000

USD

us-gaap

Allowance For Loan And Lease Loss Recovery Of Bad Debts

AllowanceForLoanAndLeaseLossRecoveryOfBadDebts

2037000

USD

CY2018Q2

us-gaap

Allowance For Loan And Lease Loss Recovery Of Bad Debts

AllowanceForLoanAndLeaseLossRecoveryOfBadDebts

768000

USD

us-gaap

Allowance For Loan And Lease Loss Recovery Of Bad Debts

AllowanceForLoanAndLeaseLossRecoveryOfBadDebts

934000

USD

CY2017Q2

us-gaap

Allowance For Loan And Lease Losses Write Offs

AllowanceForLoanAndLeaseLossesWriteOffs

10237000

USD

us-gaap

Allowance For Loan And Lease Losses Write Offs

AllowanceForLoanAndLeaseLossesWriteOffs

25061000

USD

CY2018Q2

us-gaap

Allowance For Loan And Lease Losses Write Offs

AllowanceForLoanAndLeaseLossesWriteOffs

12268000

USD

us-gaap

Allowance For Loan And Lease Losses Write Offs

AllowanceForLoanAndLeaseLossesWriteOffs

22900000

USD

CY2017Q4

us-gaap

Amortization Method Qualified Affordable Housing Project Investments

AmortizationMethodQualifiedAffordableHousingProjectInvestments

64000000

USD

CY2018Q2

us-gaap

Amortization Method Qualified Affordable Housing Project Investments

AmortizationMethodQualifiedAffordableHousingProjectInvestments

61000000

USD

CY2017Q4

us-gaap

Assets

30346986000

USD

CY2018Q2

us-gaap

Assets

31349571000

USD

CY2017Q4

us-gaap

Assets Fair Value Disclosure Recurring

AssetsFairValueDisclosureRecurring

6739196000

USD

CY2018Q2

us-gaap

Assets Fair Value Disclosure Recurring

AssetsFairValueDisclosureRecurring

7164790000

USD

CY2017Q4

us-gaap

Available For Sale Securities

AvailableForSaleSecurities

6680832000

USD

CY2018Q2

us-gaap

Available For Sale Securities

AvailableForSaleSecurities

7030614000

USD

CY2017Q4

us-gaap

Available For Sale Securities Accumulated Gross Unrealized Gain Before Tax

AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax

98906000

USD

CY2018Q2

us-gaap

Available For Sale Securities Accumulated Gross Unrealized Gain Before Tax

AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax

64852000

USD

CY2017Q4

us-gaap

Available For Sale Securities Accumulated Gross Unrealized Loss Before Tax

AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax

5860000

USD

CY2018Q2

us-gaap

Available For Sale Securities Accumulated Gross Unrealized Loss Before Tax

AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax

33969000

USD

CY2017Q4

us-gaap

Available For Sale Securities Amortized Cost

AvailableForSaleSecuritiesAmortizedCost

6587786000

USD

CY2018Q2

us-gaap

Available For Sale Securities Amortized Cost

AvailableForSaleSecuritiesAmortizedCost

6999731000

USD

CY2017Q4

us-gaap

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

AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss

1314000

USD

CY2018Q2

us-gaap

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

AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss

1240000

USD

CY2017Q4

us-gaap

Available For Sale Securities Continuous Unrealized Loss Position Fair Value

AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue

1175013000

USD

CY2018Q2

us-gaap

Available For Sale Securities Continuous Unrealized Loss Position Fair Value

AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue

2627651000

USD

CY2017Q4

us-gaap

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

AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss

4546000

USD

CY2018Q2

us-gaap

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

AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss

32729000

USD

CY2017Q4

us-gaap

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

AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue

1080493000

USD

CY2018Q2

us-gaap

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

AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue

2580948000

USD

CY2017Q4

us-gaap

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

AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue

94520000

USD

CY2018Q2

us-gaap

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

AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue

46703000

USD

CY2018Q2

us-gaap

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

AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost

2374418000

USD

CY2018Q2

us-gaap

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

AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue

2384147000

USD

CY2018Q2

us-gaap

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

AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost

3512471000

USD

CY2018Q2

us-gaap

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

AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue

3524379000

USD

CY2018Q2

us-gaap

Available For Sale Securities Debt Maturities After Ten Years Amortized Cost

AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost

377802000

USD

CY2018Q2

us-gaap

Available For Sale Securities Debt Maturities After Ten Years Fair Value

AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue

381778000

USD

CY2018Q2

us-gaap

Available For Sale Securities Debt Maturities Within One Year Amortized Cost

AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost

735040000

USD

CY2018Q2

us-gaap

Available For Sale Securities Debt Maturities Within One Year Fair Value

AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue

740310000

USD

CY2017Q2

us-gaap

Available For Sale Securities Gross Realized Gains

AvailableForSaleSecuritiesGrossRealizedGains

656000

USD

CY2018Q2

us-gaap

Available For Sale Securities Gross Realized Gains

AvailableForSaleSecuritiesGrossRealizedGains

2554000

USD

us-gaap

Available For Sale Securities Gross Realized Gains

AvailableForSaleSecuritiesGrossRealizedGains

6041000

USD

CY2017Q2

us-gaap

Available For Sale Securities Gross Realized Losses

AvailableForSaleSecuritiesGrossRealizedLosses

29000

USD

us-gaap

Available For Sale Securities Gross Realized Losses

AvailableForSaleSecuritiesGrossRealizedLosses

29000

USD

CY2018Q2

us-gaap

Available For Sale Securities Gross Realized Losses

AvailableForSaleSecuritiesGrossRealizedLosses

4000

USD

us-gaap

Available For Sale Securities Gross Realized Losses

AvailableForSaleSecuritiesGrossRealizedLosses

2514000

USD

CY2017Q4

us-gaap

Available For Sale Securities Pledged As Collateral

AvailableForSaleSecuritiesPledgedAsCollateral

2600000000

USD

CY2018Q2

us-gaap

Available For Sale Securities Pledged As Collateral

AvailableForSaleSecuritiesPledgedAsCollateral

2200000000

USD

CY2017Q2

us-gaap

Availableforsale Securities Gross Realized Gain Loss Excluding Other Than Temporary Impairments

AvailableforsaleSecuritiesGrossRealizedGainLossExcludingOtherThanTemporaryImpairments

627000

USD

us-gaap

Availableforsale Securities Gross Realized Gain Loss Excluding Other Than Temporary Impairments

AvailableforsaleSecuritiesGrossRealizedGainLossExcludingOtherThanTemporaryImpairments

2263000

USD

CY2018Q2

us-gaap

Availableforsale Securities Gross Realized Gain Loss Excluding Other Than Temporary Impairments

AvailableforsaleSecuritiesGrossRealizedGainLossExcludingOtherThanTemporaryImpairments

2550000

USD

us-gaap

Availableforsale Securities Gross Realized Gain Loss Excluding Other Than Temporary Impairments

AvailableforsaleSecuritiesGrossRealizedGainLossExcludingOtherThanTemporaryImpairments

3527000

USD

CY2018Q2

us-gaap

Availableforsale Securities In Unrealized Loss Positions Qualitative Disclosure Number Of Positions1

AvailableforsaleSecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions1

147

security

CY2017Q4

us-gaap

Bank Owned Life Insurance

BankOwnedLifeInsurance

252462000

USD

CY2018Q2

us-gaap

Bank Owned Life Insurance

BankOwnedLifeInsurance

261758000

USD

CY2016Q4

us-gaap

Cash And Cash Equivalents At Carrying Value

CashAndCashEquivalentsAtCarryingValue

448313000

USD

CY2017Q2

us-gaap

Cash And Cash Equivalents At Carrying Value

CashAndCashEquivalentsAtCarryingValue

228360000

USD

CY2017Q4

us-gaap

Cash And Cash Equivalents At Carrying Value

CashAndCashEquivalentsAtCarryingValue

194582000

USD

CY2018Q2

us-gaap

Cash And Cash Equivalents At Carrying Value

CashAndCashEquivalentsAtCarryingValue

379256000

USD

us-gaap

Cash And Cash Equivalents Period Increase Decrease

CashAndCashEquivalentsPeriodIncreaseDecrease

-219953000

USD

us-gaap

Cash And Cash Equivalents Period Increase Decrease

CashAndCashEquivalentsPeriodIncreaseDecrease

184674000

USD

CY2017Q4

us-gaap

Cash And Due From Banks

CashAndDueFromBanks

35246000

USD

CY2018Q2

us-gaap

Cash And Due From Banks

CashAndDueFromBanks

10937000

USD

CY2017Q4

us-gaap

Commitments And Contingencies

CommitmentsAndContingencies

USD

CY2018Q2

us-gaap

Commitments And Contingencies

CommitmentsAndContingencies

USD

CY2017Q2

us-gaap

Common Stock Dividends Per Share Declared

CommonStockDividendsPerShareDeclared

0.21

us-gaap

Common Stock Dividends Per Share Declared

CommonStockDividendsPerShareDeclared

0.42

CY2018Q2

us-gaap

Common Stock Dividends Per Share Declared

CommonStockDividendsPerShareDeclared

0.21

us-gaap

Common Stock Dividends Per Share Declared

CommonStockDividendsPerShareDeclared

0.42

CY2017Q4

us-gaap

Common Stock Par Or Stated Value Per Share

CommonStockParOrStatedValuePerShare

0.01

CY2018Q2

us-gaap

Common Stock Par Or Stated Value Per Share

CommonStockParOrStatedValuePerShare

0.01

CY2017Q4

us-gaap

Common Stock Shares Authorized

CommonStockSharesAuthorized

400000000

shares

CY2018Q2

us-gaap

Common Stock Shares Authorized

CommonStockSharesAuthorized

400000000

shares

CY2017Q4

us-gaap

Common Stock Shares Issued

CommonStockSharesIssued

106848185

shares

CY2018Q2

us-gaap

Common Stock Shares Issued

CommonStockSharesIssued

106241116

shares

CY2017Q4

us-gaap

Common Stock Shares Outstanding

CommonStockSharesOutstanding

106848185

shares

CY2018Q2

us-gaap

Common Stock Shares Outstanding

CommonStockSharesOutstanding

106241116

shares

CY2017Q4

us-gaap

Common Stock Value

CommonStockValue

1068000

USD

CY2018Q2

us-gaap

Common Stock Value

CommonStockValue

1062000

USD

CY2017Q2

us-gaap

Communications And Information Technology

CommunicationsAndInformationTechnology

3745000

USD

us-gaap

Communications And Information Technology

CommunicationsAndInformationTechnology

7029000

USD

CY2018Q2

us-gaap

Communications And Information Technology

CommunicationsAndInformationTechnology

3900000

USD

us-gaap

Communications And Information Technology

CommunicationsAndInformationTechnology

7585000

USD

CY2017Q2

us-gaap

Comprehensive Income Net Of Tax

ComprehensiveIncomeNetOfTax

67078000

USD

us-gaap

Comprehensive Income Net Of Tax

ComprehensiveIncomeNetOfTax

146738000

USD

CY2018Q2

us-gaap

Comprehensive Income Net Of Tax

ComprehensiveIncomeNetOfTax

84230000

USD

us-gaap

Comprehensive Income Net Of Tax

ComprehensiveIncomeNetOfTax

161907000

USD

us-gaap

Deferred Income Tax Expense Benefit

DeferredIncomeTaxExpenseBenefit

24983000

USD

us-gaap

Deferred Income Tax Expense Benefit

DeferredIncomeTaxExpenseBenefit

24074000

USD

CY2017Q4

us-gaap

Deposits

21878479000

USD

CY2018Q2

us-gaap

Deposits

22177950000

USD

CY2017Q4

us-gaap

Deposits Savings Deposits

DepositsSavingsDeposits

10715024000

USD

CY2018Q2

us-gaap

Derivative Liabilities

DerivativeLiabilities

1000

USD

CY2017Q4

us-gaap

Derivative Liability Collateral Right To Reclaim Cash Offset

DerivativeLiabilityCollateralRightToReclaimCashOffset

0

USD

CY2018Q2

us-gaap

Deposits Savings Deposits

DepositsSavingsDeposits

10590438000

USD

us-gaap

Depreciation Amortization And Accretion Net

DepreciationAmortizationAndAccretionNet

29837000

USD

us-gaap

Depreciation Amortization And Accretion Net

DepreciationAmortizationAndAccretionNet

31391000

USD

CY2017Q4

us-gaap

Derivative Asset Collateral Obligation To Return Cash Offset

DerivativeAssetCollateralObligationToReturnCashOffset

0

USD

CY2018Q2

us-gaap

Derivative Asset Collateral Obligation To Return Cash Offset

DerivativeAssetCollateralObligationToReturnCashOffset

0

USD

CY2017Q4

us-gaap

Derivative Asset Fair Value Gross Liability

DerivativeAssetFairValueGrossLiability

7996000

USD

CY2018Q2

us-gaap

Derivative Asset Fair Value Gross Liability

DerivativeAssetFairValueGrossLiability

4294000

USD

CY2017Q4

us-gaap

Derivative Asset Fair Value Of Collateral

DerivativeAssetFairValueOfCollateral

5221000

USD

CY2018Q2

us-gaap

Derivative Asset Fair Value Of Collateral

DerivativeAssetFairValueOfCollateral

25114000

USD

CY2017Q4

us-gaap

Derivative Assets

DerivativeAssets

0

USD

CY2018Q2

us-gaap

Derivative Assets

DerivativeAssets

396000

USD

CY2017Q4

us-gaap

Derivative Assets Liabilities At Fair Value Net

DerivativeAssetsLiabilitiesAtFairValueNet

-215000

USD

CY2018Q2

us-gaap

Derivative Assets Liabilities At Fair Value Net

DerivativeAssetsLiabilitiesAtFairValueNet

395000

USD

CY2018Q2

us-gaap

Derivative Collateral Obligation To Return Securities

DerivativeCollateralObligationToReturnSecurities

25000000

USD

CY2017Q4

us-gaap

Derivative Fair Value Of Derivative Asset

DerivativeFairValueOfDerivativeAsset

13217000

USD

CY2018Q2

us-gaap

Derivative Fair Value Of Derivative Asset

DerivativeFairValueOfDerivativeAsset

29804000

USD

CY2017Q4

us-gaap

Derivative Fair Value Of Derivative Asset Amount Not Offset Against Collateral

DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral

13217000

USD

CY2018Q2

us-gaap

Derivative Fair Value Of Derivative Asset Amount Not Offset Against Collateral

DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral

29804000

USD

CY2017Q4

us-gaap

Derivative Fair Value Of Derivative Liability

DerivativeFairValueOfDerivativeLiability

13173000

USD

CY2018Q2

us-gaap

Derivative Fair Value Of Derivative Liability

DerivativeFairValueOfDerivativeLiability

5143000

USD

CY2017Q4

us-gaap

Derivative Fair Value Of Derivative Liability Amount Not Offset Against Collateral

DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral

13173000

USD

CY2018Q2

us-gaap

Derivative Fair Value Of Derivative Liability Amount Not Offset Against Collateral

DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral

5143000

USD

CY2017Q4

us-gaap

Derivative Liabilities

DerivativeLiabilities

215000

USD

CY2018Q2

us-gaap

Derivative Liability Collateral Right To Reclaim Cash Offset

DerivativeLiabilityCollateralRightToReclaimCashOffset

0

USD

CY2017Q4

us-gaap

Derivative Liability Fair Value Gross Asset

DerivativeLiabilityFairValueGrossAsset

7996000

USD

CY2018Q2

us-gaap

Derivative Liability Fair Value Gross Asset

DerivativeLiabilityFairValueGrossAsset

4294000

USD

CY2017Q4

us-gaap

Derivative Liability Fair Value Of Collateral

DerivativeLiabilityFairValueOfCollateral

4962000

USD

CY2018Q2

us-gaap

Derivative Liability Fair Value Of Collateral

DerivativeLiabilityFairValueOfCollateral

848000

USD

us-gaap

Dividends Common Stock Cash

DividendsCommonStockCash

46073000

USD

us-gaap

Dividends Common Stock Cash

DividendsCommonStockCash

45857000

USD

CY2017Q2

us-gaap

Earnings Per Share Basic

EarningsPerShareBasic

0.60

us-gaap

Earnings Per Share Basic

EarningsPerShareBasic

1.18

CY2018Q2

us-gaap

Earnings Per Share Basic

EarningsPerShareBasic

0.82

us-gaap

Earnings Per Share Basic

EarningsPerShareBasic

1.60

CY2017Q2

us-gaap

Earnings Per Share Diluted

EarningsPerShareDiluted

0.60

us-gaap

Earnings Per Share Diluted

EarningsPerShareDiluted

1.17

CY2018Q2

us-gaap

Earnings Per Share Diluted

EarningsPerShareDiluted

0.82

us-gaap

Earnings Per Share Diluted

EarningsPerShareDiluted

1.59

CY2017Q2

us-gaap

Effective Income Tax Rate Continuing Operations

EffectiveIncomeTaxRateContinuingOperations

0.304

us-gaap

Effective Income Tax Rate Continuing Operations

EffectiveIncomeTaxRateContinuingOperations

0.306

CY2018Q2

us-gaap

Effective Income Tax Rate Continuing Operations

EffectiveIncomeTaxRateContinuingOperations

0.232

us-gaap

Effective Income Tax Rate Continuing Operations

EffectiveIncomeTaxRateContinuingOperations

0.231

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

0.21

us-gaap

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

EmployeeServiceShareBasedCompensationTaxBenefitFromExerciseOfStockOptions

3800000

USD

us-gaap

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

EmployeeServiceShareBasedCompensationTaxBenefitFromExerciseOfStockOptions

1100000

USD

CY2017Q4

us-gaap

Fdic Indemnification Asset

FDICIndemnificationAsset

295635000

USD

CY2018Q2

us-gaap

Fdic Indemnification Asset

FDICIndemnificationAsset

200783000

USD

CY2017Q2

us-gaap

Fdic Indemnification Asset Accretion Of Discount

FDICIndemnificationAssetAccretionOfDiscount

45663000

USD

us-gaap

Fdic Indemnification Asset Accretion Of Discount

FDICIndemnificationAssetAccretionOfDiscount

90126000

USD

CY2017

us-gaap

Fdic Indemnification Asset Accretion Of Discount

FDICIndemnificationAssetAccretionOfDiscount

176466000

USD

CY2018Q2

us-gaap

Fdic Indemnification Asset Accretion Of Discount

FDICIndemnificationAssetAccretionOfDiscount

44250000

USD

us-gaap

Fdic Indemnification Asset Accretion Of Discount

FDICIndemnificationAssetAccretionOfDiscount

84597000

USD

CY2017

us-gaap

Fdic Indemnification Asset Cash Payments Received

FDICIndemnificationAssetCashPaymentsReceived

21589000

USD

us-gaap

Fdic Indemnification Asset Cash Payments Received

FDICIndemnificationAssetCashPaymentsReceived

5240000

USD

CY2017Q2

us-gaap

Federal Deposit Insurance Corporation Premium Expense

FederalDepositInsuranceCorporationPremiumExpense

5588000

USD

us-gaap

Federal Deposit Insurance Corporation Premium Expense

FederalDepositInsuranceCorporationPremiumExpense

11063000

USD

CY2018Q2

us-gaap

Federal Deposit Insurance Corporation Premium Expense

FederalDepositInsuranceCorporationPremiumExpense

4623000

USD

us-gaap

Federal Deposit Insurance Corporation Premium Expense

FederalDepositInsuranceCorporationPremiumExpense

9435000

USD

CY2017Q4

us-gaap

Federal Home Loan Bank Stock And Federal Reserve Bank Stock

FederalHomeLoanBankStockAndFederalReserveBankStock

265989000

USD

CY2018Q2

us-gaap

Federal Home Loan Bank Stock And Federal Reserve Bank Stock

FederalHomeLoanBankStockAndFederalReserveBankStock

278739000

USD

CY2017Q2

us-gaap

Fees And Commissions

FeesAndCommissions

3252000

USD

us-gaap

Fees And Commissions

FeesAndCommissions

6455000

USD

CY2018Q2

us-gaap

Fees And Commissions

FeesAndCommissions

3510000

USD

us-gaap

Fees And Commissions

FeesAndCommissions

6997000

USD

CY2016Q4

us-gaap

Financing Receivable Allowance For Credit Losses