$WTFC
WINTRUST FINANCIAL CORP Stock $wtfc

$wtfc Overview Financials Valuation SEC Filings Company Website

2017 Q4 Form 10-Q Financial Statement

#000101532817000222 Filed on November 08, 2017

Income Statement

Concept	2017 Q4	2016 Q3
Revenue	$251.8M	$271.2M
YoY Change	17.13%	17.68%
Cost Of Revenue
YoY Change
Gross Profit
YoY Change
Gross Profit Margin
Selling, General & Admin
YoY Change
% of Gross Profit
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$16.60M	$11.50M
YoY Change	16.08%	-5.74%
% of Gross Profit
Operating Expenses
YoY Change
Operating Profit
YoY Change
Interest Expense	$32.74M	$23.51M
YoY Change	35.1%	18.52%
% of Operating Profit
Other Income/Expense, Net
YoY Change
Pretax Income	$95.79M	$85.05M
YoY Change	8.44%	36.75%
Income Tax	$27.00M	$31.94M
% Of Pretax Income	28.19%	37.55%
Net Earnings	$68.78M	$53.12M
YoY Change	25.95%	38.48%
Net Earnings / Revenue	27.31%	19.58%
Basic Earnings Per Share	$1.19	$0.96
Diluted Earnings Per Share	$1.17	$0.92
COMMON SHARES
Basic Shares Outstanding	55.92M shares	51.68M shares
Diluted Shares Outstanding		55.73M shares

Balance Sheet

Concept	2017 Q4	2016 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments
YoY Change
Cash & Equivalents	$277.6M	$246.9M
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	$621.9M	$597.3M
YoY Change	4.12%	1.69%
Goodwill	$501.9M	$485.9M
YoY Change	0.66%	2.92%
Intangibles
YoY Change
Long-Term Investments
YoY Change
Other Assets
YoY Change
Total Long-Term Assets
YoY Change
TOTAL ASSETS
Total Short-Term Assets
Total Long-Term Assets
Total Assets	$27.92B	$25.32B
YoY Change	8.76%	14.91%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$537.0M	$446.0M
YoY Change	6.34%	23.89%
Accrued Expenses
YoY Change
Deferred Revenue
YoY Change
Short-Term Debt	$17.21M	$33.17M
YoY Change	-72.16%	-42.4%
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$537.0M	$446.0M
YoY Change	6.34%	23.89%
LONG-TERM LIABILITIES
Long-Term Debt	$659.0M	$601.0M
YoY Change	0.61%	-1.64%
Other Long-Term Liabilities
YoY Change
Total Long-Term Liabilities	$659.0M	$601.0M
YoY Change	0.61%	-1.64%
TOTAL LIABILITIES
Total Short-Term Liabilities	$537.0M	$446.0M
Total Long-Term Liabilities	$659.0M	$601.0M
Total Liabilities	$24.94B	$22.65B
YoY Change	8.56%	14.96%
SHAREHOLDERS EQUITY
Retained Earnings	$1.314B	$1.052B
YoY Change	19.8%	16.65%
Common Stock	$56.07M	$51.81M
YoY Change	7.87%	7.0%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$4.986M	$4.522M
YoY Change	8.65%	14.08%
Treasury Stock Shares	103.0K shares	96.52K shares
Shareholders Equity	$2.977B	$2.674B
YoY Change
Total Liabilities & Shareholders Equity	$27.92B	$25.32B
YoY Change	8.76%	14.91%

Cashflow Statement

Concept	2017 Q4	2016 Q3
OPERATING ACTIVITIES
Net Income	$68.78M	$53.12M
YoY Change	25.95%	38.48%
Depreciation, Depletion And Amortization	$16.60M	$11.50M
YoY Change	16.08%	-5.74%
Cash From Operating Activities	$252.6M	$9.800M
YoY Change	-35.82%	-85.24%
INVESTING ACTIVITIES
Capital Expenditures	-$19.60M	-$4.100M
YoY Change	250.0%	5.13%
Acquisitions
YoY Change
Other Investing Activities	-$595.7M	-$949.7M
YoY Change	25.57%	143.89%
Cash From Investing Activities	-$615.3M	-$953.7M
YoY Change	28.19%	142.55%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	388.4M	919.4M
YoY Change	254.7%	182.63%
NET CHANGE
Cash From Operating Activities	252.6M	9.800M
Cash From Investing Activities	-615.3M	-953.7M
Cash From Financing Activities	388.4M	919.4M
Net Change In Cash	25.70M	-24.50M
YoY Change	11.26%	1533.33%
FREE CASH FLOW
Cash From Operating Activities	$252.6M	$9.800M
Capital Expenditures	-$19.60M	-$4.100M
Free Cash Flow	$272.2M	$13.90M
YoY Change	-31.81%	-80.23%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
	dei	Amendment Flag AmendmentFlag	false
	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	Q3
	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2017
	dei	Document Period End Date DocumentPeriodEndDate	2017-09-30
	dei	Document Type DocumentType	10-Q
	dei	Entity Central Index Key EntityCentralIndexKey	0001015328
CY2017Q4	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	55923249	shares
	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
	dei	Entity Registrant Name EntityRegistrantName	WINTRUST FINANCIAL CORP
	dei	Trading Symbol TradingSymbol	WTFC
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CY2016Q4	us-gaap	Deposits Money Market Deposits DepositsMoneyMarketDeposits	4441811000	USD
CY2017Q3	us-gaap	Deposits Money Market Deposits DepositsMoneyMarketDeposits	4607995000	USD
CY2016Q3	us-gaap	Deposits Negotiable Order Of Withdrawal Now DepositsNegotiableOrderOfWithdrawalNOW	2552611000	USD
CY2016Q4	us-gaap	Deposits Negotiable Order Of Withdrawal Now DepositsNegotiableOrderOfWithdrawalNOW	2624442000	USD
CY2017Q3	us-gaap	Deposits Negotiable Order Of Withdrawal Now DepositsNegotiableOrderOfWithdrawalNOW	2273025000	USD
CY2016Q3	us-gaap	Deposits Savings Deposits DepositsSavingsDeposits	1977661000	USD
CY2016Q4	us-gaap	Deposits Savings Deposits DepositsSavingsDeposits	2180482000	USD
CY2017Q3	us-gaap	Deposits Savings Deposits DepositsSavingsDeposits	2673201000	USD
	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	38798000	USD
	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	46514000	USD
CY2016Q3	us-gaap	Derivative Fair Value Of Derivative Asset Amount Not Offset Against Collateral DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral	88828000	USD
CY2016Q4	us-gaap	Derivative Fair Value Of Derivative Asset Amount Not Offset Against Collateral DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral	56394000	USD
CY2017Q3	us-gaap	Derivative Fair Value Of Derivative Asset Amount Not Offset Against Collateral DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral	48198000	USD
CY2016Q3	us-gaap	Derivative Fair Value Of Derivative Liability Amount Not Offset Against Collateral DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral	87948000	USD
CY2016Q4	us-gaap	Derivative Fair Value Of Derivative Liability Amount Not Offset Against Collateral DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral	39839000	USD
CY2017Q3	us-gaap	Derivative Fair Value Of Derivative Liability Amount Not Offset Against Collateral DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral	35773000	USD
CY2017Q3	us-gaap	Derivative Net Liability Position Aggregate Fair Value DerivativeNetLiabilityPositionAggregateFairValue	9800000	USD
	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	17846000	USD
	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	22932000	USD
	us-gaap	Dividends Preferred Stock Cash DividendsPreferredStockCash	10884000	USD
	us-gaap	Dividends Preferred Stock Cash DividendsPreferredStockCash	7728000	USD
	us-gaap	Early Repayment Of Subordinated Debt EarlyRepaymentOfSubordinatedDebt	10695000	USD
	us-gaap	Early Repayment Of Subordinated Debt EarlyRepaymentOfSubordinatedDebt	0	USD
CY2016Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.96
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.84
CY2017Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.14
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	3.34
CY2016Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.92
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.72
CY2017Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.12
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	3.23
CY2016Q3	us-gaap	Equipment Expense EquipmentExpense	9449000	USD
	us-gaap	Equipment Expense EquipmentExpense	27523000	USD
CY2017Q3	us-gaap	Equipment Expense EquipmentExpense	9947000	USD
	us-gaap	Equipment Expense EquipmentExpense	28858000	USD
CY2016Q3	us-gaap	Fdic Indemnification Asset Additional Estimated Losses FDICIndemnificationAssetAdditionalEstimatedLosses	21000	USD
	us-gaap	Fdic Indemnification Asset Additional Estimated Losses FDICIndemnificationAssetAdditionalEstimatedLosses	751000	USD
CY2017Q3	us-gaap	Fdic Indemnification Asset Additional Estimated Losses FDICIndemnificationAssetAdditionalEstimatedLosses	159000	USD
	us-gaap	Fdic Indemnification Asset Additional Estimated Losses FDICIndemnificationAssetAdditionalEstimatedLosses	316000	USD
	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	9449000	USD
CY2016	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	9650000	USD
CY2017	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	8834000	USD
CY2016Q3	us-gaap	Federal Funds Sold And Securities Purchased Under Agreements To Resell FederalFundsSoldAndSecuritiesPurchasedUnderAgreementsToResell	4122000	USD
CY2016Q4	us-gaap	Federal Funds Sold And Securities Purchased Under Agreements To Resell FederalFundsSoldAndSecuritiesPurchasedUnderAgreementsToResell	2851000	USD
CY2017Q3	us-gaap	Federal Funds Sold And Securities Purchased Under Agreements To Resell FederalFundsSoldAndSecuritiesPurchasedUnderAgreementsToResell	56000	USD
CY2016Q3	us-gaap	Federal Home Loan Bank Advances Long Term FederalHomeLoanBankAdvancesLongTerm	419632000	USD
CY2016Q4	us-gaap	Federal Home Loan Bank Advances Long Term FederalHomeLoanBankAdvancesLongTerm	153831000	USD
CY2017Q3	us-gaap	Federal Home Loan Bank Advances Long Term FederalHomeLoanBankAdvancesLongTerm	468962000	USD
CY2016Q3	us-gaap	Federal Home Loan Bank Stock And Federal Reserve Bank Stock FederalHomeLoanBankStockAndFederalReserveBankStock	129630000	USD
CY2016Q4	us-gaap	Federal Home Loan Bank Stock And Federal Reserve Bank Stock FederalHomeLoanBankStockAndFederalReserveBankStock	133494000	USD
CY2017Q3	us-gaap	Federal Home Loan Bank Stock And Federal Reserve Bank Stock FederalHomeLoanBankStockAndFederalReserveBankStock	87192000	USD
CY2016Q3	us-gaap	Fees And Commissions Depositor Accounts FeesAndCommissionsDepositorAccounts	8024000	USD
	us-gaap	Fees And Commissions Depositor Accounts FeesAndCommissionsDepositorAccounts	23156000	USD
CY2017Q3	us-gaap	Fees And Commissions Depositor Accounts FeesAndCommissionsDepositorAccounts	8645000	USD
	us-gaap	Fees And Commissions Depositor Accounts FeesAndCommissionsDepositorAccounts	25606000	USD
CY2016Q3	us-gaap	Fees And Commissions Mortgage Banking FeesAndCommissionsMortgageBanking	34712000	USD
CY2016Q3	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	3686000	USD
	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	11339000	USD
CY2017Q3	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	3877000	USD
	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	11907000	USD
	us-gaap	Fees And Commissions Mortgage Banking FeesAndCommissionsMortgageBanking	93254000	USD
CY2017Q3	us-gaap	Fees And Commissions Mortgage Banking FeesAndCommissionsMortgageBanking	28184000	USD
	us-gaap	Fees And Commissions Mortgage Banking FeesAndCommissionsMortgageBanking	86061000	USD
CY2016Q3	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	119341000	USD
CY2017Q3	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	134395000	USD
CY2016Q3	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	111150000	USD
CY2017Q3	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	126446000	USD
CY2016Q3	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	7367000	USD
CY2017Q3	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	7235000	USD
CY2016Q3	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	1194000	USD
	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	4362000	USD
CY2017Q3	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	1949000	USD
	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	5244000	USD
CY2016Q3	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	6907000	USD
	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	18478000	USD
CY2017Q3	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	6418000	USD
	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	16563000	USD
CY2016Q3	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	18552165000	USD
CY2017Q3	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	20447199000	USD
CY2016Q3	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	91374000	USD
CY2017Q3	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	79320000	USD
CY2016	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	17	Loan
CY2017	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	19	Loan
CY2016Q3	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	2
	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	15
CY2017Q3	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	5
	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	13
CY2016Q3	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	71000	USD
CY2016Q3	us-gaap	Financing Receivable Modifications Subsequent Default Recorded Investment1 FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1	1191000	USD
	us-gaap	Financing Receivable Modifications Subsequent Default Recorded Investment1 FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1	1392000	USD
CY2017Q3	us-gaap	Financing Receivable Modifications Subsequent Default Recorded Investment1 FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1	1297000	USD
CY2017Q3	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	1663000	USD
	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	5386000	USD
CY2016Q3	us-gaap	Financing Receivable Modifications Subsequent Default Number Of Contracts1 FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1	5	Loan
	us-gaap	Financing Receivable Modifications Subsequent Default Number Of Contracts1 FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1	7	Loan
CY2017Q3	us-gaap	Financing Receivable Modifications Subsequent Default Number Of Contracts1 FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1	2	Loan
	us-gaap	Financing Receivable Modifications Subsequent Default Number Of Contracts1 FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1	3	Loan
	us-gaap	Financing Receivable Modifications Subsequent Default Recorded Investment1 FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1	1529000	USD
CY2016Q3	us-gaap	Financing Receivable Recorded Investment90 Days Past Due And Still Accruing FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing	37396000	USD
CY2016Q4	us-gaap	Financing Receivable Recorded Investment90 Days Past Due And Still Accruing FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing	33738000	USD
CY2017Q3	us-gaap	Financing Receivable Recorded Investment90 Days Past Due And Still Accruing FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing	29830000	USD
CY2016Q3	us-gaap	Financing Receivable Recorded Investment Current FinancingReceivableRecordedInvestmentCurrent	18958594000	USD
CY2016Q4	us-gaap	Financing Receivable Recorded Investment Current FinancingReceivableRecordedInvestmentCurrent	19508748000	USD
CY2017Q3	us-gaap	Financing Receivable Recorded Investment Current FinancingReceivableRecordedInvestmentCurrent	20769265000	USD
CY2016Q3	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	77645000	USD
CY2016Q4	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	77578000	USD
CY2017Q3	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	63436000	USD
CY2017Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense Remainder Of Fiscal Year FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear	1027000	USD
CY2017Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	2056000	USD
CY2017Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	2597000	USD
CY2017Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	3223000	USD
CY2017Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	3796000	USD
CY2016Q3	us-gaap	Foreclosed Real Estate Expense ForeclosedRealEstateExpense	1436000	USD
	us-gaap	Foreclosed Real Estate Expense ForeclosedRealEstateExpense	3344000	USD
CY2017Q3	us-gaap	Foreclosed Real Estate Expense ForeclosedRealEstateExpense	590000	USD
	us-gaap	Foreclosed Real Estate Expense ForeclosedRealEstateExpense	2994000	USD
	us-gaap	Gain Loss On Sale Of Mortgage Loans GainLossOnSaleOfMortgageLoans	74446000	USD
	us-gaap	Gain Loss On Sale Of Mortgage Loans GainLossOnSaleOfMortgageLoans	67239000	USD
	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	89000	USD
	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	88000	USD
	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	4305000	USD
	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	USD
	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	-935000	USD
	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	-969000	USD
CY2016Q3	us-gaap	Goodwill Goodwill	485938000	USD
CY2016Q4	us-gaap	Goodwill Goodwill	498587000	USD
CY2017Q3	us-gaap	Goodwill Goodwill	502021000	USD
	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	999000	USD
	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	USD
	us-gaap	Goodwill Translation And Purchase Accounting Adjustments GoodwillTranslationAndPurchaseAccountingAdjustments	2435000	USD
CY2016Q3	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	932767000	USD
CY2016Q4	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	635705000	USD
CY2017Q3	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	819340000	USD
CY2016Q3	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Gain HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain	13092000	USD
CY2016Q4	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Gain HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain	654000	USD
CY2017Q3	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Gain HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain	2434000	USD
CY2016Q3	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Loss HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss	3193000	USD
CY2016Q4	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Loss HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss	28757000	USD
CY2017Q3	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Loss HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss	14738000	USD
CY2017Q3	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss HeldToMaturitySecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	0	USD
CY2017Q3	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Accumulated Loss HeldToMaturitySecuritiesContinuousUnrealizedLossPositionAccumulatedLoss	14738000	USD
CY2017Q3	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionFairValue	516364000	USD
CY2017Q3	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	14738000	USD
CY2017Q3	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	516364000	USD
CY2017Q3	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	0	USD
CY2016Q3	us-gaap	Held To Maturity Securities Debt Maturities Next Rolling Twelve Months Fair Value HeldToMaturitySecuritiesDebtMaturitiesNextRollingTwelveMonthsFairValue	0	USD
CY2016Q4	us-gaap	Held To Maturity Securities Debt Maturities Next Rolling Twelve Months Fair Value HeldToMaturitySecuritiesDebtMaturitiesNextRollingTwelveMonthsFairValue	0	USD
CY2017Q3	us-gaap	Held To Maturity Securities Debt Maturities Next Rolling Twelve Months Fair Value HeldToMaturitySecuritiesDebtMaturitiesNextRollingTwelveMonthsFairValue	171000	USD
CY2016Q3	us-gaap	Held To Maturity Securities Debt Maturities Rolling After Ten Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesRollingAfterTenYearsFairValue	850801000	USD
CY2016Q4	us-gaap	Held To Maturity Securities Debt Maturities Rolling After Ten Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesRollingAfterTenYearsFairValue	510366000	USD
CY2017Q3	us-gaap	Held To Maturity Securities Debt Maturities Rolling After Ten Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesRollingAfterTenYearsFairValue	577550000	USD
CY2016Q3	us-gaap	Held To Maturity Securities Debt Maturities Rolling Year Six Through Ten Fair Value HeldToMaturitySecuritiesDebtMaturitiesRollingYearSixThroughTenFairValue	65842000	USD
CY2016Q4	us-gaap	Held To Maturity Securities Debt Maturities Rolling Year Six Through Ten Fair Value HeldToMaturitySecuritiesDebtMaturitiesRollingYearSixThroughTenFairValue	67820000	USD
CY2017Q3	us-gaap	Held To Maturity Securities Debt Maturities Rolling Year Six Through Ten Fair Value HeldToMaturitySecuritiesDebtMaturitiesRollingYearSixThroughTenFairValue	192581000	USD
CY2016Q3	us-gaap	Held To Maturity Securities Debt Maturities Rolling Year Two Through Five Fair Value HeldToMaturitySecuritiesDebtMaturitiesRollingYearTwoThroughFiveFairValue	26023000	USD
CY2016Q4	us-gaap	Held To Maturity Securities Debt Maturities Rolling Year Two Through Five Fair Value HeldToMaturitySecuritiesDebtMaturitiesRollingYearTwoThroughFiveFairValue	29416000	USD
CY2017Q3	us-gaap	Held To Maturity Securities Debt Maturities Rolling Year Two Through Five Fair Value HeldToMaturitySecuritiesDebtMaturitiesRollingYearTwoThroughFiveFairValue	36734000	USD
CY2016Q3	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	942700000	USD
CY2016Q3	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	942666000	USD
CY2016Q4	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	607602000	USD
CY2017Q3	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	807036000	USD
CY2016Q3	us-gaap	Heldtomaturity Securities Debt Maturities Next Rolling Twelve Months Amortized Cost HeldtomaturitySecuritiesDebtMaturitiesNextRollingTwelveMonthsAmortizedCost	0	USD
CY2016Q4	us-gaap	Heldtomaturity Securities Debt Maturities Next Rolling Twelve Months Amortized Cost HeldtomaturitySecuritiesDebtMaturitiesNextRollingTwelveMonthsAmortizedCost	0	USD
CY2017Q3	us-gaap	Heldtomaturity Securities Debt Maturities Next Rolling Twelve Months Amortized Cost HeldtomaturitySecuritiesDebtMaturitiesNextRollingTwelveMonthsAmortizedCost	170000	USD
CY2016Q3	us-gaap	Heldtomaturity Securities Debt Maturities Rolling After Ten Years Amortized Cost HeldtomaturitySecuritiesDebtMaturitiesRollingAfterTenYearsAmortizedCost	842005000	USD
CY2016Q4	us-gaap	Heldtomaturity Securities Debt Maturities Rolling After Ten Years Amortized Cost HeldtomaturitySecuritiesDebtMaturitiesRollingAfterTenYearsAmortizedCost	536247000	USD
CY2017Q3	us-gaap	Heldtomaturity Securities Debt Maturities Rolling After Ten Years Amortized Cost HeldtomaturitySecuritiesDebtMaturitiesRollingAfterTenYearsAmortizedCost	588869000	USD
CY2016Q3	us-gaap	Heldtomaturity Securities Debt Maturities Rolling Year Six Through Ten Amortized Cost HeldtomaturitySecuritiesDebtMaturitiesRollingYearSixThroughTenAmortizedCost	64835000	USD
CY2016Q4	us-gaap	Heldtomaturity Securities Debt Maturities Rolling Year Six Through Ten Amortized Cost HeldtomaturitySecuritiesDebtMaturitiesRollingYearSixThroughTenAmortizedCost	69664000	USD
CY2017Q3	us-gaap	Heldtomaturity Securities Debt Maturities Rolling Year Six Through Ten Amortized Cost HeldtomaturitySecuritiesDebtMaturitiesRollingYearSixThroughTenAmortizedCost	193387000	USD
CY2016Q3	us-gaap	Heldtomaturity Securities Debt Maturities Rolling Year Two Through Five Amortized Cost HeldtomaturitySecuritiesDebtMaturitiesRollingYearTwoThroughFiveAmortizedCost	25927000	USD
CY2016Q4	us-gaap	Heldtomaturity Securities Debt Maturities Rolling Year Two Through Five Amortized Cost HeldtomaturitySecuritiesDebtMaturitiesRollingYearTwoThroughFiveAmortizedCost	29794000	USD
CY2017Q3	us-gaap	Heldtomaturity Securities Debt Maturities Rolling Year Two Through Five Amortized Cost HeldtomaturitySecuritiesDebtMaturitiesRollingYearTwoThroughFiveAmortizedCost	36914000	USD
	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	94750000	USD
CY2016	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	105423000	USD
	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	84905000	USD
	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	4066000	USD
CY2016	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	5485000	USD
	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	3424000	USD
CY2016Q3	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	90540000	USD
CY2016Q4	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	90516000	USD
CY2017Q3	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	78600000	USD
CY2017Q3	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	78594000	USD
CY2016Q3	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	6836000	USD
CY2016Q4	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	6377000	USD
CY2017Q3	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	7218000	USD
CY2016Q3	us-gaap	Impaired Financing Receivable Unpaid Principal Balance ImpairedFinancingReceivableUnpaidPrincipalBalance	106758000	USD
CY2016Q4	us-gaap	Impaired Financing Receivable Unpaid Principal Balance ImpairedFinancingReceivableUnpaidPrincipalBalance	103046000	USD
CY2017Q3	us-gaap	Impaired Financing Receivable Unpaid Principal Balance ImpairedFinancingReceivableUnpaidPrincipalBalance	91091000	USD
CY2016Q3	us-gaap	Impaired Financing Receivable With No Related Allowance Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment	51518000	USD
CY2016Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment	57370000	USD
CY2017Q3	us-gaap	Impaired Financing Receivable With No Related Allowance Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment	47730000	USD
CY2016Q3	us-gaap	Impaired Financing Receivable With Related Allowance Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment	39022000	USD
CY2016Q4	us-gaap	Impaired Financing Receivable With Related Allowance Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment	33146000	USD
CY2017Q3	us-gaap	Impaired Financing Receivable With Related Allowance Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment	30864000	USD
CY2016Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	85054000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	243522000	USD
CY2017Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	104248000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	294212000	USD
CY2016Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	31939000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	91255000	USD
CY2017Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	38622000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	105311000	USD
	us-gaap	Increase Decrease In Broker Dealer Related Receivables Payables Net IncreaseDecreaseInBrokerDealerRelatedReceivablesPayablesNet	-2120000	USD
	us-gaap	Increase Decrease In Broker Dealer Related Receivables Payables Net IncreaseDecreaseInBrokerDealerRelatedReceivablesPayablesNet	-1550000	USD
	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	2408216000	USD
	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	1236548000	USD
	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	131504000	USD
	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	62599000	USD
	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	31082000	USD
	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-81157000	USD
	us-gaap	Increase Decrease In Trading Securities IncreaseDecreaseInTradingSecurities	644000	USD
	us-gaap	Increase Decrease In Trading Securities IncreaseDecreaseInTradingSecurities	-1346000	USD
CY2016Q3	us-gaap	Incremental Common Shares Attributable To Conversion Of Preferred Stock IncrementalCommonSharesAttributableToConversionOfPreferredStock	3109000	shares
	us-gaap	Incremental Common Shares Attributable To Conversion Of Preferred Stock IncrementalCommonSharesAttributableToConversionOfPreferredStock	3109000	shares
CY2017Q3	us-gaap	Incremental Common Shares Attributable To Conversion Of Preferred Stock IncrementalCommonSharesAttributableToConversionOfPreferredStock	0	shares
	us-gaap	Incremental Common Shares Attributable To Conversion Of Preferred Stock IncrementalCommonSharesAttributableToConversionOfPreferredStock	1317000	shares
CY2016Q3	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	938000	shares
	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	822000	shares
CY2017Q3	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	966000	shares
	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	988000	shares
CY2016Q3	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	7432000	USD
	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	21089000	USD
CY2017Q3	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	7851000	USD
	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	23580000	USD
CY2016Q3	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	208149000	USD
	us-gaap	Interest Income Deposits With Financial Institutions InterestIncomeDepositsWithFinancialInstitutions	2695000	USD
	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	597444000	USD
CY2017Q3	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	247688000	USD
	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	694628000	USD
CY2016Q3	us-gaap	Interest And Dividend Income Securities InterestAndDividendIncomeSecurities	15496000	USD
	us-gaap	Interest And Dividend Income Securities InterestAndDividendIncomeSecurities	49084000	USD
CY2017Q3	us-gaap	Interest And Dividend Income Securities InterestAndDividendIncomeSecurities	16058000	USD
	us-gaap	Interest And Dividend Income Securities InterestAndDividendIncomeSecurities	45155000	USD
CY2016Q3	us-gaap	Interest And Dividend Income Securities Trading Or Measured At Fair Value InterestAndDividendIncomeSecuritiesTradingOrMeasuredAtFairValue	18000	USD
	us-gaap	Interest And Dividend Income Securities Trading Or Measured At Fair Value InterestAndDividendIncomeSecuritiesTradingOrMeasuredAtFairValue	43000	USD
CY2017Q3	us-gaap	Interest And Dividend Income Securities Trading Or Measured At Fair Value InterestAndDividendIncomeSecuritiesTradingOrMeasuredAtFairValue	8000	USD
	us-gaap	Interest And Dividend Income Securities Trading Or Measured At Fair Value InterestAndDividendIncomeSecuritiesTradingOrMeasuredAtFairValue	23000	USD
CY2016Q3	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	190189000	USD
	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	541846000	USD
CY2017Q3	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	227120000	USD
	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	639143000	USD
CY2016Q3	us-gaap	Interest Bearing Deposit Liabilities InterestBearingDepositLiabilities	15436613000	USD
CY2016Q4	us-gaap	Interest Bearing Deposit Liabilities InterestBearingDepositLiabilities	15731255000	USD
CY2017Q3	us-gaap	Interest Bearing Deposit Liabilities InterestBearingDepositLiabilities	16392654000	USD
CY2016Q3	us-gaap	Interest Bearing Deposits In Banks InterestBearingDepositsInBanks	816104000	USD
CY2016Q4	us-gaap	Interest Bearing Deposits In Banks InterestBearingDepositsInBanks	980457000	USD
CY2017Q3	us-gaap	Interest Bearing Deposits In Banks InterestBearingDepositsInBanks	1218728000	USD
CY2016Q3	us-gaap	Interest Expense InterestExpense	23513000	USD
	us-gaap	Interest Expense InterestExpense	66029000	USD
CY2017Q3	us-gaap	Interest Expense InterestExpense	31700000	USD
	us-gaap	Interest Expense InterestExpense	81651000	USD
CY2016Q3	us-gaap	Interest Expense Borrowings InterestExpenseBorrowings	1137000	USD
	us-gaap	Interest Expense Borrowings InterestExpenseBorrowings	3281000	USD
CY2017Q3	us-gaap	Interest Expense Borrowings InterestExpenseBorrowings	1482000	USD
	us-gaap	Interest Expense Borrowings InterestExpenseBorrowings	3770000	USD
CY2016Q3	us-gaap	Interest Expense Deposits InterestExpenseDeposits	15621000	USD
	us-gaap	Interest Expense Deposits InterestExpenseDeposits	41996000	USD
CY2017Q3	us-gaap	Interest Expense Deposits InterestExpenseDeposits	23655000	USD
	us-gaap	Interest Expense Deposits InterestExpenseDeposits	58396000	USD
CY2016Q3	us-gaap	Interest Expense Federal Home Loan Bank And Federal Reserve Bank Advances Long Term InterestExpenseFederalHomeLoanBankAndFederalReserveBankAdvancesLongTerm	2577000	USD
	us-gaap	Interest Expense Federal Home Loan Bank And Federal Reserve Bank Advances Long Term InterestExpenseFederalHomeLoanBankAndFederalReserveBankAdvancesLongTerm	8447000	USD
CY2017Q3	us-gaap	Interest Expense Federal Home Loan Bank And Federal Reserve Bank Advances Long Term InterestExpenseFederalHomeLoanBankAndFederalReserveBankAdvancesLongTerm	2151000	USD
	us-gaap	Interest Expense Federal Home Loan Bank And Federal Reserve Bank Advances Long Term InterestExpenseFederalHomeLoanBankAndFederalReserveBankAdvancesLongTerm	6674000	USD
CY2016Q3	us-gaap	Interest Expense Junior Subordinated Debentures InterestExpenseJuniorSubordinatedDebentures	2400000	USD
	us-gaap	Interest Expense Junior Subordinated Debentures InterestExpenseJuniorSubordinatedDebentures	6973000	USD
CY2017Q3	us-gaap	Interest Expense Junior Subordinated Debentures InterestExpenseJuniorSubordinatedDebentures	2640000	USD
	us-gaap	Interest Expense Junior Subordinated Debentures InterestExpenseJuniorSubordinatedDebentures	7481000	USD
CY2016Q3	us-gaap	Interest Expense Subordinated Notes And Debentures InterestExpenseSubordinatedNotesAndDebentures	1778000	USD
	us-gaap	Interest Expense Subordinated Notes And Debentures InterestExpenseSubordinatedNotesAndDebentures	5332000	USD
CY2017Q3	us-gaap	Interest Expense Subordinated Notes And Debentures InterestExpenseSubordinatedNotesAndDebentures	1772000	USD
	us-gaap	Interest Expense Subordinated Notes And Debentures InterestExpenseSubordinatedNotesAndDebentures	5330000	USD
CY2016Q3	us-gaap	Interest Income Deposits With Financial Institutions InterestIncomeDepositsWithFinancialInstitutions	1156000	USD
CY2017Q3	us-gaap	Interest Income Deposits With Financial Institutions InterestIncomeDepositsWithFinancialInstitutions	3272000	USD
	us-gaap	Interest Income Deposits With Financial Institutions InterestIncomeDepositsWithFinancialInstitutions	6529000	USD
CY2016Q3	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	175065000	USD
	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	504681000	USD
CY2017Q3	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	208092000	USD
	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	590981000	USD
CY2016Q3	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	184636000	USD
	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	531415000	USD
CY2017Q3	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	215988000	USD
	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	612977000	USD
CY2016Q3	us-gaap	Interest Income Federal Funds Sold And Securities Purchased Under Agreements To Resell InterestIncomeFederalFundsSoldAndSecuritiesPurchasedUnderAgreementsToResell	1000	USD
	us-gaap	Interest Income Federal Funds Sold And Securities Purchased Under Agreements To Resell InterestIncomeFederalFundsSoldAndSecuritiesPurchasedUnderAgreementsToResell	3000	USD
CY2017Q3	us-gaap	Interest Income Federal Funds Sold And Securities Purchased Under Agreements To Resell InterestIncomeFederalFundsSoldAndSecuritiesPurchasedUnderAgreementsToResell	0	USD
	us-gaap	Interest Income Federal Funds Sold And Securities Purchased Under Agreements To Resell InterestIncomeFederalFundsSoldAndSecuritiesPurchasedUnderAgreementsToResell	2000	USD
CY2016Q3	us-gaap	Interest Receivable And Other Assets InterestReceivableAndOtherAssets	660923000	USD
CY2016Q4	us-gaap	Interest Receivable And Other Assets InterestReceivableAndOtherAssets	593796000	USD
CY2017Q3	us-gaap	Interest Receivable And Other Assets InterestReceivableAndOtherAssets	580612000	USD
CY2016Q3	us-gaap	Junior Subordinated Debenture Owed To Unconsolidated Subsidiary Trust JuniorSubordinatedDebentureOwedToUnconsolidatedSubsidiaryTrust	253600000	USD
CY2016Q3	us-gaap	Junior Subordinated Debenture Owed To Unconsolidated Subsidiary Trust JuniorSubordinatedDebentureOwedToUnconsolidatedSubsidiaryTrust	253566000	USD
CY2016Q4	us-gaap	Junior Subordinated Debenture Owed To Unconsolidated Subsidiary Trust JuniorSubordinatedDebentureOwedToUnconsolidatedSubsidiaryTrust	253600000	USD
CY2016Q4	us-gaap	Junior Subordinated Debenture Owed To Unconsolidated Subsidiary Trust JuniorSubordinatedDebentureOwedToUnconsolidatedSubsidiaryTrust	253566000	USD
CY2017Q3	us-gaap	Junior Subordinated Debenture Owed To Unconsolidated Subsidiary Trust JuniorSubordinatedDebentureOwedToUnconsolidatedSubsidiaryTrust	253566000	USD
CY2016Q3	us-gaap	Labor And Related Expense LaborAndRelatedExpense	103718000	USD
	us-gaap	Labor And Related Expense LaborAndRelatedExpense	300423000	USD
CY2017Q3	us-gaap	Labor And Related Expense LaborAndRelatedExpense	106251000	USD
	us-gaap	Labor And Related Expense LaborAndRelatedExpense	312069000	USD
CY2016Q3	us-gaap	Liabilities Liabilities	22647285000	USD
CY2016Q4	us-gaap	Liabilities Liabilities	22972936000	USD
CY2017Q3	us-gaap	Liabilities Liabilities	24449237000	USD
CY2016Q3	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	25321759000	USD
CY2016Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	25668553000	USD
CY2017Q3	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	27358162000	USD
CY2015Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	105400000	USD
CY2016Q2	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	114356000	USD
CY2016Q3	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	117693000	USD
CY2016Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	122291000	USD
CY2017Q2	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	129591000	USD
CY2017Q3	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	133119000	USD
CY2015Q4	us-gaap	Loans And Leases Receivable Allowance Covered LoansAndLeasesReceivableAllowanceCovered	3026000	USD
CY2016Q2	us-gaap	Loans And Leases Receivable Allowance Covered LoansAndLeasesReceivableAllowanceCovered	2412000	USD
CY2016Q3	us-gaap	Loans And Leases Receivable Allowance Covered LoansAndLeasesReceivableAllowanceCovered	1422000	USD
CY2016Q4	us-gaap	Loans And Leases Receivable Allowance Covered LoansAndLeasesReceivableAllowanceCovered	1322000	USD
CY2017Q2	us-gaap	Loans And Leases Receivable Allowance Covered LoansAndLeasesReceivableAllowanceCovered	1074000	USD
CY2017Q3	us-gaap	Loans And Leases Receivable Allowance Covered LoansAndLeasesReceivableAllowanceCovered	758000	USD
CY2017Q3	us-gaap	Loans And Leases Receivable Net Reported Amount Covered LoansAndLeasesReceivableNetReportedAmountCovered	46601000	USD
CY2016Q3	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	19101261000	USD
CY2016Q4	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	19703172000	USD
CY2017Q3	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	20912781000	USD
CY2016Q3	us-gaap	Loans And Leases Receivable Net Reported Amount Covered LoansAndLeasesReceivableNetReportedAmountCovered	95940000	USD
CY2016Q4	us-gaap	Loans And Leases Receivable Net Reported Amount Covered LoansAndLeasesReceivableNetReportedAmountCovered	58145000	USD
CY2016Q3	us-gaap	Loans And Leases Receivable Net Reported Amount Covered And Not Covered LoansAndLeasesReceivableNetReportedAmountCoveredAndNotCovered	19078086000	USD
CY2016Q4	us-gaap	Loans And Leases Receivable Net Reported Amount Covered And Not Covered LoansAndLeasesReceivableNetReportedAmountCoveredAndNotCovered	19637704000	USD
CY2017Q3	us-gaap	Loans And Leases Receivable Net Reported Amount Covered And Not Covered LoansAndLeasesReceivableNetReportedAmountCoveredAndNotCovered	20825505000	USD
CY2016Q3	us-gaap	Loans Held For Sale Fair Value Disclosure LoansHeldForSaleFairValueDisclosure	559634000	USD
CY2016Q4	us-gaap	Loans Held For Sale Fair Value Disclosure LoansHeldForSaleFairValueDisclosure	418374000	USD
CY2017Q3	us-gaap	Loans Held For Sale Fair Value Disclosure LoansHeldForSaleFairValueDisclosure	370282000	USD
CY2017Q3	us-gaap	Loans Payable To Bank LoansPayableToBank	150000000	USD
CY2016Q3	us-gaap	Marketable Securities Realized Gain Loss MarketableSecuritiesRealizedGainLoss	3305000	USD
	us-gaap	Marketable Securities Realized Gain Loss MarketableSecuritiesRealizedGainLoss	6070000	USD
CY2017Q3	us-gaap	Marketable Securities Realized Gain Loss MarketableSecuritiesRealizedGainLoss	39000	USD
	us-gaap	Marketable Securities Realized Gain Loss MarketableSecuritiesRealizedGainLoss	31000	USD
CY2016Q3	us-gaap	Marketable Securities Realized Gain Loss Excluding Other Than Temporary Impairments MarketableSecuritiesRealizedGainLossExcludingOtherThanTemporaryImpairments	3305000	USD
	us-gaap	Marketable Securities Realized Gain Loss Excluding Other Than Temporary Impairments MarketableSecuritiesRealizedGainLossExcludingOtherThanTemporaryImpairments	6070000	USD
CY2017Q3	us-gaap	Marketable Securities Realized Gain Loss Excluding Other Than Temporary Impairments MarketableSecuritiesRealizedGainLossExcludingOtherThanTemporaryImpairments	39000	USD
	us-gaap	Marketable Securities Realized Gain Loss Excluding Other Than Temporary Impairments MarketableSecuritiesRealizedGainLossExcludingOtherThanTemporaryImpairments	31000	USD
CY2016Q3	us-gaap	Marketing And Advertising Expense MarketingAndAdvertisingExpense	7365000	USD
	us-gaap	Marketing And Advertising Expense MarketingAndAdvertisingExpense	18085000	USD
CY2017Q3	us-gaap	Marketing And Advertising Expense MarketingAndAdvertisingExpense	9572000	USD
	us-gaap	Marketing And Advertising Expense MarketingAndAdvertisingExpense	23448000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	2066059000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	1521842000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-2012302000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-1688317000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	-82605000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	148382000	USD
CY2016Q3	us-gaap	Net Income Loss NetIncomeLoss	53115000	USD
	us-gaap	Net Income Loss NetIncomeLoss	152267000	USD
CY2017Q3	us-gaap	Net Income Loss NetIncomeLoss	65626000	USD
	us-gaap	Net Income Loss NetIncomeLoss	188901000	USD
CY2016Q3	us-gaap	Net Income Loss Attributable To Parent Diluted NetIncomeLossAttributableToParentDiluted	51065000	USD
	us-gaap	Net Income Loss Attributable To Parent Diluted NetIncomeLossAttributableToParentDiluted	146118000	USD
CY2017Q3	us-gaap	Net Income Loss Attributable To Parent Diluted NetIncomeLossAttributableToParentDiluted	63576000	USD
	us-gaap	Net Income Loss Attributable To Parent Diluted NetIncomeLossAttributableToParentDiluted	182751000	USD
CY2016Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	49487000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	141383000	USD
CY2017Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	63576000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	181173000	USD
CY2016Q3	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	5711042000	USD
CY2016Q4	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	5927377000	USD
CY2017Q3	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	6502409000	USD
CY2016Q3	us-gaap	Noninterest Expense NoninterestExpense	176615000	USD
	us-gaap	Noninterest Expense NoninterestExpense	501314000	USD
CY2017Q3	us-gaap	Noninterest Expense NoninterestExpense	183575000	USD
	us-gaap	Noninterest Expense NoninterestExpense	535237000	USD
	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Forfeitures In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice	48.93
CY2016Q3	us-gaap	Noninterest Income NoninterestIncome	86604000	USD
	us-gaap	Noninterest Income NoninterestIncome	240155000	USD
CY2017Q3	us-gaap	Noninterest Income NoninterestIncome	79731000	USD
	us-gaap	Noninterest Income NoninterestIncome	238468000	USD
CY2016Q3	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	13569000	USD
	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	40821000	USD
CY2017Q3	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	13585000	USD
	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	43943000	USD
CY2016Q3	us-gaap	Notes Payable NotesPayable	56191000	USD
CY2016Q4	us-gaap	Notes Payable NotesPayable	52445000	USD
CY2017Q3	us-gaap	Notes Payable NotesPayable	41216000	USD
	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	3	segment
CY2016Q3	us-gaap	Occupancy Net OccupancyNet	12767000	USD
	us-gaap	Occupancy Net OccupancyNet	36658000	USD
CY2017Q3	us-gaap	Occupancy Net OccupancyNet	13079000	USD
	us-gaap	Occupancy Net OccupancyNet	38766000	USD
CY2016Q3	us-gaap	Operating Leases Income Statement Depreciation Expense On Property Subject To Or Held For Lease OperatingLeasesIncomeStatementDepreciationExpenseOnPropertySubjectToOrHeldForLease	3605000	USD
	us-gaap	Operating Leases Income Statement Depreciation Expense On Property Subject To Or Held For Lease OperatingLeasesIncomeStatementDepreciationExpenseOnPropertySubjectToOrHeldForLease	9040000	USD
CY2017Q3	us-gaap	Operating Leases Income Statement Depreciation Expense On Property Subject To Or Held For Lease OperatingLeasesIncomeStatementDepreciationExpenseOnPropertySubjectToOrHeldForLease	6794000	USD
	us-gaap	Operating Leases Income Statement Depreciation Expense On Property Subject To Or Held For Lease OperatingLeasesIncomeStatementDepreciationExpenseOnPropertySubjectToOrHeldForLease	17092000	USD
CY2016Q3	us-gaap	Operating Leases Income Statement Lease Revenue OperatingLeasesIncomeStatementLeaseRevenue	4459000	USD
	us-gaap	Operating Leases Income Statement Lease Revenue OperatingLeasesIncomeStatementLeaseRevenue	11270000	USD
CY2017Q3	us-gaap	Operating Leases Income Statement Lease Revenue OperatingLeasesIncomeStatementLeaseRevenue	8461000	USD
	us-gaap	Operating Leases Income Statement Lease Revenue OperatingLeasesIncomeStatementLeaseRevenue	21048000	USD
CY2016Q3	us-gaap	Other Borrowings OtherBorrowings	241366000	USD
CY2016Q4	us-gaap	Other Borrowings OtherBorrowings	262486000	USD
CY2017Q3	us-gaap	Other Borrowings OtherBorrowings	251680000	USD
CY2016Q3	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	1822000	USD
	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	23467000	USD
CY2017Q3	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	609000	USD
	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	14896000	USD
CY2016Q3	us-gaap	Other Comprehensive Income Loss Before Reclassifications Net Of Tax OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax	925000	USD
	us-gaap	Other Comprehensive Income Loss Before Reclassifications Net Of Tax OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax	25516000	USD
CY2017Q3	us-gaap	Other Comprehensive Income Loss Before Reclassifications Net Of Tax OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax	5087000	USD
	us-gaap	Other Comprehensive Income Loss Before Reclassifications Net Of Tax OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax	24124000	USD
CY2016Q3	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Before Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentBeforeTax	-2237000	USD
	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Before Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentBeforeTax	6966000	USD
CY2017Q3	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Before Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentBeforeTax	5643000	USD
	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Before Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentBeforeTax	10678000	USD
CY2016Q3	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	-1644000	USD
	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	5006000	USD
CY2017Q3	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	4206000	USD
	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	7916000	USD
CY2016Q3	us-gaap	Other Comprehensive Income Loss Foreign Currency Translation Adjustment Tax OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax	-593000	USD
	us-gaap	Other Comprehensive Income Loss Foreign Currency Translation Adjustment Tax OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax	1960000	USD
CY2017Q3	us-gaap	Other Comprehensive Income Loss Foreign Currency Translation Adjustment Tax OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax	1437000	USD
	us-gaap	Other Comprehensive Income Loss Foreign Currency Translation Adjustment Tax OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax	2762000	USD
CY2016Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	1861000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	30129000	USD
CY2017Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	5051000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	23842000	USD
CY2016Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	3305000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	6070000	USD
CY2017Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	39000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	31000	USD
CY2016Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	2005000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	3684000	USD
CY2017Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	24000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	19000	USD
CY2016Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	1300000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	2386000	USD
CY2017Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	15000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	12000	USD
CY2016Q3	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax	2773000	USD
	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax	2728000	USD
CY2017Q3	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax	394000	USD
	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax	1699000	USD
CY2016Q3	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	1683000	USD
	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	1656000	USD
CY2017Q3	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	236000	USD
	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	1030000	USD
CY2016Q3	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax	1090000	USD
	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax	1072000	USD
CY2017Q3	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax	158000	USD
	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax	669000	USD
CY2016Q3	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	2525000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	33669000	USD
CY2017Q3	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	811000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	25783000	USD
CY2016Q3	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	1532000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	20444000	USD
CY2017Q3	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	653000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	15815000	USD
CY2016Q3	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	993000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	13225000	USD
CY2017Q3	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	158000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	9968000	USD
	wtfc	Fdic Indemnification Liability Cash Proceeds From Payments To FDICIndemnificationLiabilityCashProceedsFromPaymentsTo	2124000	USD
	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Forfeitures In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice	43.07
CY2016Q3	us-gaap	Other Intangible Assets Net OtherIntangibleAssetsNet	20736000	USD
CY2016Q4	us-gaap	Other Intangible Assets Net OtherIntangibleAssetsNet	21851000	USD
CY2017Q3	us-gaap	Other Intangible Assets Net OtherIntangibleAssetsNet	18651000	USD
CY2016Q3	us-gaap	Other Long Term Debt OtherLongTermDebt	18360000	USD
CY2016Q4	us-gaap	Other Long Term Debt OtherLongTermDebt	18154000	USD
CY2017Q3	us-gaap	Other Long Term Debt OtherLongTermDebt	49502000	USD
CY2016Q3	us-gaap	Other Noninterest Expense OtherNoninterestExpense	20564000	USD
	us-gaap	Other Noninterest Expense OtherNoninterestExpense	55196000	USD
CY2017Q3	us-gaap	Other Noninterest Expense OtherNoninterestExpense	17760000	USD
	us-gaap	Other Noninterest Expense OtherNoninterestExpense	54194000	USD
CY2016Q3	us-gaap	Other Than Temporary Impairment Losses Investments Availableforsale Securities OtherThanTemporaryImpairmentLossesInvestmentsAvailableforsaleSecurities	0	USD
	us-gaap	Other Than Temporary Impairment Losses Investments Availableforsale Securities OtherThanTemporaryImpairmentLossesInvestmentsAvailableforsaleSecurities	0	USD
CY2017Q3	us-gaap	Other Than Temporary Impairment Losses Investments Availableforsale Securities OtherThanTemporaryImpairmentLossesInvestmentsAvailableforsaleSecurities	0	USD
	us-gaap	Other Than Temporary Impairment Losses Investments Availableforsale Securities OtherThanTemporaryImpairmentLossesInvestmentsAvailableforsaleSecurities	0	USD
	us-gaap	Payments For Origination And Purchases Of Loans Held For Sale PaymentsForOriginationAndPurchasesOfLoansHeldForSale	3208468000	USD
	us-gaap	Payments For Origination And Purchases Of Loans Held For Sale PaymentsForOriginationAndPurchasesOfLoansHeldForSale	2812685000	USD
	us-gaap	Payments For Proceeds From Federal Home Loan Bank Stock PaymentsForProceedsFromFederalHomeLoanBankStock	28049000	USD
	us-gaap	Payments For Proceeds From Federal Home Loan Bank Stock PaymentsForProceedsFromFederalHomeLoanBankStock	-46302000	USD
	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	1303218000	USD
	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	1176279000	USD
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	549000	USD
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	295000	USD
	us-gaap	Payments Of Dividends PaymentsOfDividends	28730000	USD
	us-gaap	Payments Of Dividends PaymentsOfDividends	30660000	USD
	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	3169020000	USD
	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	446278000	USD
	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	578315000	USD
	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	284000	USD
	us-gaap	Payments To Acquire Held To Maturity Securities PaymentsToAcquireHeldToMaturitySecurities	472803000	USD
	us-gaap	Payments To Acquire Held To Maturity Securities PaymentsToAcquireHeldToMaturitySecurities	287976000	USD
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	28276000	USD
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	39583000	USD
CY2016Q3	us-gaap	Percentage Of Interest Bearing Domestic Deposits To Deposits Money Market PercentageOfInterestBearingDomesticDepositsToDepositsMoneyMarket	0.21
CY2016Q4	us-gaap	Percentage Of Interest Bearing Domestic Deposits To Deposits Money Market PercentageOfInterestBearingDomesticDepositsToDepositsMoneyMarket	0.21
CY2017Q3	us-gaap	Percentage Of Interest Bearing Domestic Deposits To Deposits Money Market PercentageOfInterestBearingDomesticDepositsToDepositsMoneyMarket	0.20
CY2016Q3	us-gaap	Percentage Of Interest Bearing Domestic Deposits To Deposits Savings PercentageOfInterestBearingDomesticDepositsToDepositsSavings	0.09
CY2016Q4	us-gaap	Percentage Of Interest Bearing Domestic Deposits To Deposits Savings PercentageOfInterestBearingDomesticDepositsToDepositsSavings	0.10
CY2017Q3	us-gaap	Percentage Of Interest Bearing Domestic Deposits To Deposits Savings PercentageOfInterestBearingDomesticDepositsToDepositsSavings	0.12
CY2016Q3	us-gaap	Percentage Of Interest Bearing Domestic Deposits To Deposits Time Deposits PercentageOfInterestBearingDomesticDepositsToDepositsTimeDeposits	0.20
CY2016Q4	us-gaap	Percentage Of Interest Bearing Domestic Deposits To Deposits Time Deposits PercentageOfInterestBearingDomesticDepositsToDepositsTimeDeposits	0.20
CY2017Q3	us-gaap	Percentage Of Interest Bearing Domestic Deposits To Deposits Time Deposits PercentageOfInterestBearingDomesticDepositsToDepositsTimeDeposits	0.20
CY2016Q3	us-gaap	Preferred Stock Dividends And Other Adjustments PreferredStockDividendsAndOtherAdjustments	3628000	USD
	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	40.57
	us-gaap	Preferred Stock Dividends And Other Adjustments PreferredStockDividendsAndOtherAdjustments	10884000	USD
CY2017Q3	us-gaap	Preferred Stock Dividends And Other Adjustments PreferredStockDividendsAndOtherAdjustments	2050000	USD
	us-gaap	Preferred Stock Dividends And Other Adjustments PreferredStockDividendsAndOtherAdjustments	7728000	USD
CY2016Q3	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	20000000	shares
CY2016Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	20000000	shares
CY2017Q3	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	20000000	shares
CY2016Q2	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	152900000	USD
	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	152823000	USD
	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	0	USD
	us-gaap	Proceeds From Life Insurance Policies ProceedsFromLifeInsurancePolicies	659000	USD
	us-gaap	Proceeds From Life Insurance Policies ProceedsFromLifeInsurancePolicies	0	USD
	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	1128428000	USD
	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	190799000	USD
	us-gaap	Proceeds From Payments For In Interest Bearing Deposits In Banks ProceedsFromPaymentsForInInterestBearingDepositsInBanks	-204085000	USD
	us-gaap	Proceeds From Payments For In Interest Bearing Deposits In Banks ProceedsFromPaymentsForInInterestBearingDepositsInBanks	-236531000	USD
	us-gaap	Proceeds From Repayments Of Other Debt ProceedsFromRepaymentsOfOtherDebt	-24545000	USD
	us-gaap	Proceeds From Repayments Of Other Debt ProceedsFromRepaymentsOfOtherDebt	-20111000	USD
CY2016Q3	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	1114666000	USD
	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	2186662000	USD
CY2017Q3	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	136789000	USD
	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	146518000	USD
	us-gaap	Proceeds From Sale Of Foreclosed Assets ProceedsFromSaleOfForeclosedAssets	29223000	USD
	us-gaap	Proceeds From Sale Of Foreclosed Assets ProceedsFromSaleOfForeclosedAssets	12892000	USD
	us-gaap	Proceeds From Sale Of Mortgage Loans Held For Sale ProceedsFromSaleOfMortgageLoansHeldForSale	3111318000	USD
	us-gaap	Proceeds From Sale Of Mortgage Loans Held For Sale ProceedsFromSaleOfMortgageLoansHeldForSale	2916368000	USD
	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	6900000	USD
	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	20300000	USD
CY2016Q3	us-gaap	Professional Fees ProfessionalFees	5508000	USD
	us-gaap	Professional Fees ProfessionalFees	14986000	USD
CY2017Q3	us-gaap	Professional Fees ProfessionalFees	6786000	USD
	us-gaap	Professional Fees ProfessionalFees	18956000	USD
CY2016Q3	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	597263000	USD
CY2016Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	597301000	USD
CY2017Q3	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	609978000	USD
CY2016Q3	us-gaap	Property Subject To Or Available For Operating Lease Net PropertySubjectToOrAvailableForOperatingLeaseNet	116355000	USD
CY2016Q4	us-gaap	Property Subject To Or Available For Operating Lease Net PropertySubjectToOrAvailableForOperatingLeaseNet	129402000	USD
CY2017Q3	us-gaap	Property Subject To Or Available For Operating Lease Net PropertySubjectToOrAvailableForOperatingLeaseNet	193828000	USD
CY2016Q3	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	9741000	USD
	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	27433000	USD
CY2017Q3	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	7942000	USD
	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	22210000	USD
CY2016Q3	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	9571000	USD
	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	26734000	USD
CY2017Q3	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	7896000	USD
	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	21996000	USD
CY2016Q3	us-gaap	Receivables From Brokers Dealers And Clearing Organizations ReceivablesFromBrokersDealersAndClearingOrganizations	25511000	USD
CY2016Q4	us-gaap	Receivables From Brokers Dealers And Clearing Organizations ReceivablesFromBrokersDealersAndClearingOrganizations	25181000	USD
CY2017Q3	us-gaap	Receivables From Brokers Dealers And Clearing Organizations ReceivablesFromBrokersDealersAndClearingOrganizations	23631000	USD
CY2016Q3	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax	1359000	USD
	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax	2094000	USD
CY2017Q3	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax	16000	USD
	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax	-618000	USD
CY2016Q3	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	1051748000	USD
CY2016Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	1096518000	USD
CY2017Q3	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	1254759000	USD
CY2016Q3	us-gaap	Revenues Revenues	271240000	USD
	us-gaap	Revenues Revenues	771570000	USD
CY2017Q3	us-gaap	Revenues Revenues	295719000	USD
	us-gaap	Revenues Revenues	851445000	USD
CY2016Q3	us-gaap	Secured Debt SecuredDebt	133642000	USD
CY2016Q4	us-gaap	Secured Debt SecuredDebt	130078000	USD
CY2017Q3	us-gaap	Secured Debt SecuredDebt	141003000	USD
	us-gaap	Servicing Asset At Fair Value Period Increase Decrease ServicingAssetAtFairValuePeriodIncreaseDecrease	-4810000	USD
	us-gaap	Servicing Asset At Fair Value Period Increase Decrease ServicingAssetAtFairValuePeriodIncreaseDecrease	1338000	USD
	us-gaap	Share Based Compensation ShareBasedCompensation	6778000	USD
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	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Dividend Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate	0.009
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CY2017Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Available For Grant ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant	4000000	shares
CY2016Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	813666	shares
CY2017Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	640759	shares
CY2016Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	39.27
CY2017Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	41.58
	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	2700000	USD
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	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod	86039	shares
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	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	8.61
CY2016Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	26363000	USD
CY2017Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	43122000	USD
CY2015Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	1551734	shares
CY2016Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	1843495	shares
CY2016Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	1698912	shares
CY2017Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	1183312	shares
CY2015Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	41.32
CY2016Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	41.27
CY2016Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	41.50
CY2017Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	41.87
	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	37.43
	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	41.04
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	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1	P4Y6M
CY2016Q3	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Intrinsic Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1	13265000	USD
CY2017Q3	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Intrinsic Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1	23532000	USD
	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1	P3Y6M0D
	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1	P3Y6M0D
	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P4Y9M18D
	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P4Y2M12D
CY2016Q3	us-gaap	Short Term Borrowings ShortTermBorrowings	33173000	USD
CY2016Q4	us-gaap	Short Term Borrowings ShortTermBorrowings	61809000	USD
CY2017Q3	us-gaap	Short Term Borrowings ShortTermBorrowings	19959000	USD
CY2016Q2	us-gaap	Stock Issued During Period Shares New Issues StockIssuedDuringPeriodSharesNewIssues	3000000	shares
	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	184366	shares
	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	499222	shares
	us-gaap	Stock Issued During Period Value Acquisitions StockIssuedDuringPeriodValueAcquisitions	152823000	USD
	us-gaap	Stock Issued During Period Value Conversion Of Convertible Securities StockIssuedDuringPeriodValueConversionOfConvertibleSecurities	0	USD
	us-gaap	Stock Issued During Period Value Conversion Of Convertible Securities StockIssuedDuringPeriodValueConversionOfConvertibleSecurities	0	USD
	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	1933000	USD
	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	1921000	USD
	us-gaap	Stock Issued During Period Value Issued For Services StockIssuedDuringPeriodValueIssuedForServices	1190000	USD
	us-gaap	Stock Issued During Period Value Issued For Services StockIssuedDuringPeriodValueIssuedForServices	1193000	USD
	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	37000	USD
	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	-295000	USD
CY2015Q4	us-gaap	Stockholders Equity StockholdersEquity	2352274000	USD
CY2016Q3	us-gaap	Stockholders Equity StockholdersEquity	2674474000	USD
CY2016Q4	us-gaap	Stockholders Equity StockholdersEquity	2695617000	USD
CY2017Q3	us-gaap	Stockholders Equity StockholdersEquity	2908925000	USD
CY2016Q3	us-gaap	Subordinated Debt SubordinatedDebt	138943000	USD
CY2016Q4	us-gaap	Subordinated Debt SubordinatedDebt	138971000	USD
CY2017Q3	us-gaap	Subordinated Debt SubordinatedDebt	139052000	USD
CY2016Q3	us-gaap	Time Deposits TimeDeposits	4201477000	USD
CY2016Q4	us-gaap	Time Deposits TimeDeposits	4274903000	USD
CY2017Q3	us-gaap	Time Deposits TimeDeposits	4666675000	USD
CY2016Q3	us-gaap	Trading Gains Losses TradingGainsLosses	-432000	USD
	us-gaap	Trading Gains Losses TradingGainsLosses	-916000	USD
CY2017Q3	us-gaap	Trading Gains Losses TradingGainsLosses	-129000	USD
	us-gaap	Trading Gains Losses TradingGainsLosses	-869000	USD
CY2016Q3	us-gaap	Trading Securities TradingSecurities	1092000	USD
CY2016Q4	us-gaap	Trading Securities TradingSecurities	1989000	USD
CY2017Q3	us-gaap	Trading Securities TradingSecurities	643000	USD
CY2016Q3	us-gaap	Treasury Stock Shares TreasuryStockShares	96521	shares
CY2016Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	97749	shares
CY2017Q3	us-gaap	Treasury Stock Shares TreasuryStockShares	101738	shares
CY2016Q3	us-gaap	Treasury Stock Value TreasuryStockValue	4522000	USD
CY2016Q4	us-gaap	Treasury Stock Value TreasuryStockValue	4589000	USD
CY2017Q3	us-gaap	Treasury Stock Value TreasuryStockValue	4884000	USD
CY2016Q3	us-gaap	Unamortized Loan Commitment And Origination Fees And Unamortized Discounts Or Premiums UnamortizedLoanCommitmentAndOriginationFeesAndUnamortizedDiscountsOrPremiums	873000	USD
CY2016Q4	us-gaap	Unamortized Loan Commitment And Origination Fees And Unamortized Discounts Or Premiums UnamortizedLoanCommitmentAndOriginationFeesAndUnamortizedDiscountsOrPremiums	2600000	USD
CY2017Q3	us-gaap	Unamortized Loan Commitment And Origination Fees And Unamortized Discounts Or Premiums UnamortizedLoanCommitmentAndOriginationFeesAndUnamortizedDiscountsOrPremiums	8000000	USD
CY2016Q3	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	4047000	shares
	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	3931000	shares
CY2017Q3	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	966000	shares
	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	2305000	shares
CY2016Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	55726000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	53694000	shares
CY2017Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	56762000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	56597000	shares
CY2016Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	51679000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	49763000	shares
CY2017Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	55796000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	54292000	shares
	wtfc	Accretion Amortization Of Discount Premium On Loans AccretionAmortizationOfDiscountPremiumOnLoans	23416000	USD
	wtfc	Accretion Amortization Of Discount Premium On Loans AccretionAmortizationOfDiscountPremiumOnLoans	16885000	USD
CY2016Q3	wtfc	Allowance For Unfunded Lending Related Commitments AllowanceForUnfundedLendingRelatedCommitments	1648000	USD
CY2017Q3	wtfc	Allowance For Unfunded Lending Related Commitments AllowanceForUnfundedLendingRelatedCommitments	1276000	USD
CY2017Q3	wtfc	Assets Nonrecurring Fair Value Losses Recognized AssetsNonrecurringFairValueLossesRecognized	4749000	USD
	wtfc	Assets Nonrecurring Fair Value Losses Recognized AssetsNonrecurringFairValueLossesRecognized	12349000	USD
CY2017Q3	wtfc	Assets Percentage AssetsPercentage	0.08
	wtfc	Bank Owned Life Insurance Net Of Claims BankOwnedLifeInsuranceNetOfClaims	2613000	USD
	wtfc	Bank Owned Life Insurance Net Of Claims BankOwnedLifeInsuranceNetOfClaims	2770000	USD
CY2016Q3	wtfc	Benefit Attributable To Federal Deposit Insurance Corporation Loss Share Agreements BenefitAttributableToFederalDepositInsuranceCorporationLossShareAgreements	677000	USD
	wtfc	Benefit Attributable To Federal Deposit Insurance Corporation Loss Share Agreements BenefitAttributableToFederalDepositInsuranceCorporationLossShareAgreements	2796000	USD
CY2017Q3	wtfc	Benefit Attributable To Federal Deposit Insurance Corporation Loss Share Agreements BenefitAttributableToFederalDepositInsuranceCorporationLossShareAgreements	180000	USD
	wtfc	Benefit Attributable To Federal Deposit Insurance Corporation Loss Share Agreements BenefitAttributableToFederalDepositInsuranceCorporationLossShareAgreements	850000	USD
CY2016Q3	wtfc	Brokerage Trust And Asset Management Revenue BrokerageTrustAndAssetManagementRevenue	19334000	USD
	wtfc	Brokerage Trust And Asset Management Revenue BrokerageTrustAndAssetManagementRevenue	56506000	USD
CY2017Q3	wtfc	Brokerage Trust And Asset Management Revenue BrokerageTrustAndAssetManagementRevenue	19803000	USD
	wtfc	Brokerage Trust And Asset Management Revenue BrokerageTrustAndAssetManagementRevenue	59856000	USD
CY2016Q3	wtfc	Certain Loans Acquired Accretable Yield Amortized To Indemnification Asset CertainLoansAcquiredAccretableYieldAmortizedToIndemnificationAsset	1744000	USD
	wtfc	Certain Loans Acquired Accretable Yield Amortized To Indemnification Asset CertainLoansAcquiredAccretableYieldAmortizedToIndemnificationAsset	5539000	USD
CY2017Q3	wtfc	Certain Loans Acquired Accretable Yield Amortized To Indemnification Asset CertainLoansAcquiredAccretableYieldAmortizedToIndemnificationAsset	371000	USD
	wtfc	Certain Loans Acquired Accretable Yield Amortized To Indemnification Asset CertainLoansAcquiredAccretableYieldAmortizedToIndemnificationAsset	1086000	USD
CY2017Q3	wtfc	Certain Loans Acquired In Transfer Not Accountedfoas Debt Securities Accretable Yield To Be Amortized To Indemnification Asset CertainLoansAcquiredInTransferNotAccountedfoasDebtSecuritiesAccretableYieldToBeAmortizedToIndemnificationAsset	24000	USD
CY2017Q3	wtfc	Change In Contribution Assets ChangeInContributionAssets	2036403000	USD
CY2017Q3	wtfc	Change In Contribution Interest Income Expense Net ChangeInContributionInterestIncomeExpenseNet	31352000	USD
	wtfc	Change In Contribution Interest Income Expense Net ChangeInContributionInterestIncomeExpenseNet	81562000	USD
CY2017Q3	wtfc	Change In Contribution Non Interest Income ChangeInContributionNonInterestIncome	-6873000	USD
	wtfc	Change In Contribution Non Interest Income ChangeInContributionNonInterestIncome	-1687000	USD
CY2017Q3	wtfc	Change In Contribution Operating Income Loss ChangeInContributionOperatingIncomeLoss	12511000	USD
	wtfc	Change In Contribution Operating Income Loss ChangeInContributionOperatingIncomeLoss	36634000	USD
CY2017Q3	wtfc	Change In Contribution Revenues ChangeInContributionRevenues	24479000	USD
	wtfc	Change In Contribution Revenues ChangeInContributionRevenues	79875000	USD
CY2017Q3	wtfc	Common Securities Proportion To Junior Subordinated Debentures CommonSecuritiesProportionToJuniorSubordinatedDebentures	0.03
CY2017Q1	wtfc	Common Stock Dividends Per Share Declared Annualized CommonStockDividendsPerShareDeclaredAnnualized	0.56
CY2017Q2	wtfc	Common Stock Dividends Per Share Declared Annualized CommonStockDividendsPerShareDeclaredAnnualized	0.56
CY2017Q3	wtfc	Common Stock Dividends Per Share Declared Annualized CommonStockDividendsPerShareDeclaredAnnualized	0.56
CY2016Q3	wtfc	Covered Loans90 Days Past Due And Still Accruing CoveredLoans90DaysPastDueAndStillAccruing	4806000	USD
CY2016Q4	wtfc	Covered Loans90 Days Past Due And Still Accruing CoveredLoans90DaysPastDueAndStillAccruing	2492000	USD
CY2017Q3	wtfc	Covered Loans90 Days Past Due And Still Accruing CoveredLoans90DaysPastDueAndStillAccruing	2233000	USD
CY2016Q3	wtfc	Covered Loans Charged Off CoveredLoansChargedOff	918000	USD
	wtfc	Covered Loans Charged Off CoveredLoansChargedOff	1291000	USD
CY2017Q3	wtfc	Covered Loans Charged Off CoveredLoansChargedOff	155000	USD
	wtfc	Covered Loans Charged Off CoveredLoansChargedOff	491000	USD
CY2016Q3	wtfc	Covered Loans Current CoveredLoansCurrent	84802000	USD
CY2016Q4	wtfc	Covered Loans Current CoveredLoansCurrent	51754000	USD
CY2017Q3	wtfc	Covered Loans Current CoveredLoansCurrent	41313000	USD
CY2016Q3	wtfc	Covered Loans Net Charge Offs CoveredLoansNetChargeOffs	143000	USD
	wtfc	Covered Loans Net Charge Offs CoveredLoansNetChargeOffs	-1891000	USD
CY2017Q3	wtfc	Covered Loans Net Charge Offs CoveredLoansNetChargeOffs	91000	USD
	wtfc	Covered Loans Net Charge Offs CoveredLoansNetChargeOffs	-499000	USD
CY2016Q3	wtfc	Covered Loans Nonaccrual CoveredLoansNonaccrual	2331000	USD
CY2016Q4	wtfc	Covered Loans Nonaccrual CoveredLoansNonaccrual	2121000	USD
CY2017Q3	wtfc	Covered Loans Nonaccrual CoveredLoansNonaccrual	1936000	USD
CY2016Q3	wtfc	Debt Currentand Noncurrent DebtCurrentandNoncurrent	799941000	USD
CY2016Q4	wtfc	Debt Currentand Noncurrent DebtCurrentandNoncurrent	555288000	USD
CY2017Q3	wtfc	Debt Currentand Noncurrent DebtCurrentandNoncurrent	859694000	USD
CY2016Q3	wtfc	Deposits Percentage DepositsPercentage	1
CY2016Q4	wtfc	Deposits Percentage DepositsPercentage	1
CY2017Q3	wtfc	Deposits Percentage DepositsPercentage	1
	wtfc	Effective Income Tax Rate Reconciliation Sharebased Compensation Excess Tax Benefit Amount EffectiveIncomeTaxRateReconciliationSharebasedCompensationExcessTaxBenefitAmount	5000000	USD
CY2015Q4	wtfc	Fdic Indemnification Liability Asset FDICIndemnificationLiabilityAsset	6100000	USD
CY2016Q2	wtfc	Fdic Indemnification Liability Asset FDICIndemnificationLiabilityAsset	11729000	USD
CY2016Q3	wtfc	Fdic Indemnification Liability Asset FDICIndemnificationLiabilityAsset	17945000	USD
CY2016Q4	wtfc	Fdic Indemnification Liability Asset FDICIndemnificationLiabilityAsset	16701000	USD
CY2017Q2	wtfc	Fdic Indemnification Liability Asset FDICIndemnificationLiabilityAsset	15375000	USD
CY2017Q3	wtfc	Fdic Indemnification Liability Asset FDICIndemnificationLiabilityAsset	15472000	USD
CY2016Q3	wtfc	Fdic Indemnification Liability Asset Amortization FDICIndemnificationLiabilityAssetAmortization	456000	USD
	wtfc	Fdic Indemnification Liability Asset Amortization FDICIndemnificationLiabilityAssetAmortization	1322000	USD
CY2017Q3	wtfc	Fdic Indemnification Liability Asset Amortization FDICIndemnificationLiabilityAssetAmortization	311000	USD
	wtfc	Fdic Indemnification Liability Asset Amortization FDICIndemnificationLiabilityAssetAmortization	1010000	USD
CY2016Q3	wtfc	Fdic Indemnification Liability Cash Proceeds From Payments To FDICIndemnificationLiabilityCashProceedsFromPaymentsTo	1704000	USD
	wtfc	Marketable Securities Gross Realized Losses Excluding Other Than Temporary Impairments MarketableSecuritiesGrossRealizedLossesExcludingOtherThanTemporaryImpairments	75000	USD
CY2017Q3	wtfc	Fdic Indemnification Liability Cash Proceeds From Payments To FDICIndemnificationLiabilityCashProceedsFromPaymentsTo	-1049000	USD
	wtfc	Fdic Indemnification Liability Cash Proceeds From Payments To FDICIndemnificationLiabilityCashProceedsFromPaymentsTo	-258000	USD
CY2016Q3	wtfc	Fdic Indemnification Liability Change In Expected Reimbursements From To Fdic FDICIndemnificationLiabilityChangeInExpectedReimbursementsFromToFDIC	4077000	USD
	wtfc	Fdic Indemnification Liability Change In Expected Reimbursements From To Fdic FDICIndemnificationLiabilityChangeInExpectedReimbursementsFromToFDIC	9150000	USD
CY2017Q3	wtfc	Fdic Indemnification Liability Change In Expected Reimbursements From To Fdic FDICIndemnificationLiabilityChangeInExpectedReimbursementsFromToFDIC	994000	USD
	wtfc	Fdic Indemnification Liability Change In Expected Reimbursements From To Fdic FDICIndemnificationLiabilityChangeInExpectedReimbursementsFromToFDIC	-1665000	USD
	wtfc	Fdic Loss Sharing Agreement Percentage FDICLossSharingAgreementPercentage	0.8
CY2016Q3	wtfc	Fees From Covered Call Options FeesFromCoveredCallOptions	3633000	USD
	wtfc	Fees From Covered Call Options FeesFromCoveredCallOptions	9994000	USD
CY2017Q3	wtfc	Fees From Covered Call Options FeesFromCoveredCallOptions	1143000	USD
	wtfc	Fees From Covered Call Options FeesFromCoveredCallOptions	2792000	USD
CY2016Q3	wtfc	Financing Receivable Allowance For Credit Losses Other Adjustments FinancingReceivableAllowanceForCreditLossesOtherAdjustments	-112000	USD
	wtfc	Financing Receivable Allowance For Credit Losses Other Adjustments FinancingReceivableAllowanceForCreditLossesOtherAdjustments	-324000	USD
CY2017Q3	wtfc	Financing Receivable Allowance For Credit Losses Other Adjustments FinancingReceivableAllowanceForCreditLossesOtherAdjustments	-39000	USD
	wtfc	Financing Receivable Allowance For Credit Losses Other Adjustments FinancingReceivableAllowanceForCreditLossesOtherAdjustments	-125000	USD
CY2016Q3	wtfc	Financing Receivables Modifications Weighted Average Extension Term FinancingReceivablesModificationsWeightedAverageExtensionTerm	P22M
	wtfc	Financing Receivables Modifications Weighted Average Extension Term FinancingReceivablesModificationsWeightedAverageExtensionTerm	P6M
CY2017Q3	wtfc	Financing Receivables Modifications Weighted Average Extension Term FinancingReceivablesModificationsWeightedAverageExtensionTerm	P36M
	wtfc	Financing Receivables Modifications Weighted Average Extension Term FinancingReceivablesModificationsWeightedAverageExtensionTerm	P36M
CY2017Q3	wtfc	Impaired Loans Fair Value Losses Recognized ImpairedLoansFairValueLossesRecognized	4259000	USD
	wtfc	Impaired Loans Fair Value Losses Recognized ImpairedLoansFairValueLossesRecognized	10589000	USD
CY2017Q2	wtfc	Increase Decrease In Loss Share Liabilities IncreaseDecreaseInLossShareLiabilities	-4900000	USD
CY2016Q3	wtfc	Increase In Fdic Indemnification Asset IncreaseInFdicIndemnificationAsset	677000	USD
	wtfc	Increase In Fdic Indemnification Asset IncreaseInFdicIndemnificationAsset	2796000	USD
CY2017Q3	wtfc	Increase In Fdic Indemnification Asset IncreaseInFdicIndemnificationAsset	180000	USD
	wtfc	Increase In Fdic Indemnification Asset IncreaseInFdicIndemnificationAsset	850000	USD
CY2017Q3	wtfc	Interest Income Expense Net Percentage InterestIncomeExpenseNetPercentage	0.17
	wtfc	Interest Income Expense Net Percentage InterestIncomeExpenseNetPercentage	0.15
CY2016Q3	wtfc	Interest Income Federal Home Loan Banks And Federal Reserve Bank Stock InterestIncomeFederalHomeLoanBanksAndFederalReserveBankStock	1094000	USD
	wtfc	Interest Income Federal Home Loan Banks And Federal Reserve Bank Stock InterestIncomeFederalHomeLoanBanksAndFederalReserveBankStock	3143000	USD
CY2017Q3	wtfc	Interest Income Federal Home Loan Banks And Federal Reserve Bank Stock InterestIncomeFederalHomeLoanBanksAndFederalReserveBankStock	1080000	USD
	wtfc	Interest Income Federal Home Loan Banks And Federal Reserve Bank Stock InterestIncomeFederalHomeLoanBanksAndFederalReserveBankStock	3303000	USD
CY2016Q3	wtfc	Interest Income On Brokerage Customer Receivables InterestIncomeOnBrokerageCustomerReceivables	195000	USD
	wtfc	Interest Income On Brokerage Customer Receivables InterestIncomeOnBrokerageCustomerReceivables	630000	USD
CY2017Q3	wtfc	Interest Income On Brokerage Customer Receivables InterestIncomeOnBrokerageCustomerReceivables	150000	USD
	wtfc	Interest Income On Brokerage Customer Receivables InterestIncomeOnBrokerageCustomerReceivables	473000	USD
	wtfc	Issuance Of Common Shares Resulting From Exercise Of Stock Options Employee Stock Purchase Plan And Conversion Of Common Stock Warrants IssuanceOfCommonSharesResultingFromExerciseOfStockOptionsEmployeeStockPurchasePlanAndConversionOfCommonStockWarrants	9796000	USD
	wtfc	Issuance Of Common Shares Resulting From Exercise Of Stock Options Employee Stock Purchase Plan And Conversion Of Common Stock Warrants IssuanceOfCommonSharesResultingFromExerciseOfStockOptionsEmployeeStockPurchasePlanAndConversionOfCommonStockWarrants	23360000	USD
CY2016Q3	wtfc	Loan Forgiveness LoanForgiveness	0	USD
	wtfc	Loan Forgiveness LoanForgiveness	300000	USD
CY2017Q3	wtfc	Loan Forgiveness LoanForgiveness	73000	USD
	wtfc	Loan Forgiveness LoanForgiveness	73000	USD
CY2016Q3	wtfc	Loans And Leases Receivable Net Of Deferred Income Including Covered Loans LoansAndLeasesReceivableNetOfDeferredIncomeIncludingCoveredLoans	19197201000	USD
CY2016Q4	wtfc	Loans And Leases Receivable Net Of Deferred Income Including Covered Loans LoansAndLeasesReceivableNetOfDeferredIncomeIncludingCoveredLoans	19761317000	USD
CY2017Q3	wtfc	Loans And Leases Receivable Net Of Deferred Income Including Covered Loans LoansAndLeasesReceivableNetOfDeferredIncomeIncludingCoveredLoans	20959382000	USD
CY2016Q3	wtfc	Loans Heldfor Investment.Fair Value Disclosure LoansHeldforInvestment.FairValueDisclosure	17603000	USD
CY2017Q3	wtfc	Loans Heldfor Investment.Fair Value Disclosure LoansHeldforInvestment.FairValueDisclosure	29414000	USD
	wtfc	Payments Received From The Fdic For Indemnification PaymentsReceivedFromTheFDICForIndemnification	2124000	USD
CY2016Q3	wtfc	Loans Net Of Unearned Income Excluding Covered Loans90 Days Past Due And Still Accruing LoansNetOfUnearnedIncomeExcludingCoveredLoans90DaysPastDueAndStillAccruing	32590000	USD
CY2016Q4	wtfc	Loans Net Of Unearned Income Excluding Covered Loans90 Days Past Due And Still Accruing LoansNetOfUnearnedIncomeExcludingCoveredLoans90DaysPastDueAndStillAccruing	31246000	USD
CY2017Q3	wtfc	Loans Net Of Unearned Income Excluding Covered Loans90 Days Past Due And Still Accruing LoansNetOfUnearnedIncomeExcludingCoveredLoans90DaysPastDueAndStillAccruing	27597000	USD
CY2016Q3	wtfc	Loans Net Of Unearned Income Excluding Covered Loans Current LoansNetOfUnearnedIncomeExcludingCoveredLoansCurrent	18873792000	USD
CY2016Q4	wtfc	Loans Net Of Unearned Income Excluding Covered Loans Current LoansNetOfUnearnedIncomeExcludingCoveredLoansCurrent	19456994000	USD
CY2017Q3	wtfc	Loans Net Of Unearned Income Excluding Covered Loans Current LoansNetOfUnearnedIncomeExcludingCoveredLoansCurrent	20727952000	USD
CY2016Q3	wtfc	Loans Net Of Unearned Income Excluding Covered Loans Nonaccrual Status LoansNetOfUnearnedIncomeExcludingCoveredLoansNonaccrualStatus	75314000	USD
CY2016Q4	wtfc	Loans Net Of Unearned Income Excluding Covered Loans Nonaccrual Status LoansNetOfUnearnedIncomeExcludingCoveredLoansNonaccrualStatus	75457000	USD
CY2017Q3	wtfc	Loans Net Of Unearned Income Excluding Covered Loans Nonaccrual Status LoansNetOfUnearnedIncomeExcludingCoveredLoansNonaccrualStatus	61500000	USD
CY2016Q3	wtfc	Marketable Securities Gross Realized Gains Excluding Other Than Temporary Impairments MarketableSecuritiesGrossRealizedGainsExcludingOtherThanTemporaryImpairments	3429000	USD
	wtfc	Marketable Securities Gross Realized Gains Excluding Other Than Temporary Impairments MarketableSecuritiesGrossRealizedGainsExcludingOtherThanTemporaryImpairments	7466000	USD
CY2017Q3	wtfc	Marketable Securities Gross Realized Gains Excluding Other Than Temporary Impairments MarketableSecuritiesGrossRealizedGainsExcludingOtherThanTemporaryImpairments	58000	USD
	wtfc	Marketable Securities Gross Realized Gains Excluding Other Than Temporary Impairments MarketableSecuritiesGrossRealizedGainsExcludingOtherThanTemporaryImpairments	106000	USD
CY2016Q3	wtfc	Marketable Securities Gross Realized Losses Excluding Other Than Temporary Impairments MarketableSecuritiesGrossRealizedLossesExcludingOtherThanTemporaryImpairments	124000	USD
	wtfc	Marketable Securities Gross Realized Losses Excluding Other Than Temporary Impairments MarketableSecuritiesGrossRealizedLossesExcludingOtherThanTemporaryImpairments	1396000	USD
CY2017Q3	wtfc	Marketable Securities Gross Realized Losses Excluding Other Than Temporary Impairments MarketableSecuritiesGrossRealizedLossesExcludingOtherThanTemporaryImpairments	19000	USD
CY2016Q3	wtfc	No Wand Interest Bearing Demand Deposits Percentage NOWandInterestBearingDemandDepositsPercentage	0.12
CY2016Q4	wtfc	No Wand Interest Bearing Demand Deposits Percentage NOWandInterestBearingDemandDepositsPercentage	0.12
CY2017Q3	wtfc	No Wand Interest Bearing Demand Deposits Percentage NOWandInterestBearingDemandDepositsPercentage	0.10
CY2016Q3	wtfc	Net Provision For Covered Loan Losses NetProvisionForCoveredLoanLosses	-170000	USD
	wtfc	Net Provision For Covered Loan Losses NetProvisionForCoveredLoanLosses	-699000	USD
CY2017Q3	wtfc	Net Provision For Covered Loan Losses NetProvisionForCoveredLoanLosses	-45000	USD
	wtfc	Net Provision For Covered Loan Losses NetProvisionForCoveredLoanLosses	-213000	USD
CY2016Q3	wtfc	Non Interest Bearing Percentage NonInterestBearingPercentage	0.27
CY2016Q4	wtfc	Non Interest Bearing Percentage NonInterestBearingPercentage	0.27
CY2017Q3	wtfc	Non Interest Bearing Percentage NonInterestBearingPercentage	0.28
CY2017Q3	wtfc	Non Interest Income Percentage NonInterestIncomePercentage	-0.08
	wtfc	Non Interest Income Percentage NonInterestIncomePercentage	-0.01
CY2017Q3	wtfc	Number Of Subsidiaries NumberOfSubsidiaries	15	subsidiary
CY2017Q3	wtfc	Number Of Unconsolidated Subsidiary Trusts NumberOfUnconsolidatedSubsidiaryTrusts	11	trust
CY2017Q3	wtfc	Operating Income Loss Percentage OperatingIncomeLossPercentage	0.24
	wtfc	Operating Income Loss Percentage OperatingIncomeLossPercentage	0.24
CY2016Q3	wtfc	Other Comprehensive Income Loss Securities Transferred From Available For Sale To Held To Maturity Adjustment Before Tax OtherComprehensiveIncomeLossSecuritiesTransferredFromAvailableForSaleToHeldToMaturityAdjustmentBeforeTax	-3781000	USD
	wtfc	Other Comprehensive Income Loss Securities Transferred From Available For Sale To Held To Maturity Adjustment Before Tax OtherComprehensiveIncomeLossSecuritiesTransferredFromAvailableForSaleToHeldToMaturityAdjustmentBeforeTax	-11038000	USD
CY2017Q3	wtfc	Other Comprehensive Income Loss Securities Transferred From Available For Sale To Held To Maturity Adjustment Before Tax OtherComprehensiveIncomeLossSecuritiesTransferredFromAvailableForSaleToHeldToMaturityAdjustmentBeforeTax	33000	USD
	wtfc	Other Comprehensive Income Loss Securities Transferred From Available For Sale To Held To Maturity Adjustment Before Tax OtherComprehensiveIncomeLossSecuritiesTransferredFromAvailableForSaleToHeldToMaturityAdjustmentBeforeTax	1483000	USD
CY2016Q3	wtfc	Other Comprehensive Income Loss Securities Transferred From Available For Sale To Held To Maturity Adjustment Net Of Tax OtherComprehensiveIncomeLossSecuritiesTransferredFromAvailableForSaleToHeldToMaturityAdjustmentNetOfTax	-2295000	USD
	wtfc	Other Comprehensive Income Loss Securities Transferred From Available For Sale To Held To Maturity Adjustment Net Of Tax OtherComprehensiveIncomeLossSecuritiesTransferredFromAvailableForSaleToHeldToMaturityAdjustmentNetOfTax	-6707000	USD
CY2017Q3	wtfc	Other Comprehensive Income Loss Securities Transferred From Available For Sale To Held To Maturity Adjustment Net Of Tax OtherComprehensiveIncomeLossSecuritiesTransferredFromAvailableForSaleToHeldToMaturityAdjustmentNetOfTax	20000	USD
	wtfc	Other Comprehensive Income Loss Securities Transferred From Available For Sale To Held To Maturity Adjustment Net Of Tax OtherComprehensiveIncomeLossSecuritiesTransferredFromAvailableForSaleToHeldToMaturityAdjustmentNetOfTax	900000	USD
CY2016Q3	wtfc	Other Comprehensive Income Loss Securities Transferred From Available For Sale To Held To Maturity Adjustment Tax Effect OtherComprehensiveIncomeLossSecuritiesTransferredFromAvailableForSaleToHeldToMaturityAdjustmentTaxEffect	-1486000	USD
	wtfc	Other Comprehensive Income Loss Securities Transferred From Available For Sale To Held To Maturity Adjustment Tax Effect OtherComprehensiveIncomeLossSecuritiesTransferredFromAvailableForSaleToHeldToMaturityAdjustmentTaxEffect	-4331000	USD
CY2017Q3	wtfc	Other Comprehensive Income Loss Securities Transferred From Available For Sale To Held To Maturity Adjustment Tax Effect OtherComprehensiveIncomeLossSecuritiesTransferredFromAvailableForSaleToHeldToMaturityAdjustmentTaxEffect	13000	USD
	wtfc	Other Comprehensive Income Loss Securities Transferred From Available For Sale To Held To Maturity Adjustment Tax Effect OtherComprehensiveIncomeLossSecuritiesTransferredFromAvailableForSaleToHeldToMaturityAdjustmentTaxEffect	583000	USD
CY2017Q3	wtfc	Ownership Interest Percentage In Unconsolidated Subsidary Trusts OwnershipInterestPercentageInUnconsolidatedSubsidaryTrusts	1
	wtfc	Payments Received From The Fdic For Indemnification PaymentsReceivedFromTheFDICForIndemnification	-258000	USD
CY2016Q3	wtfc	Percentage Of Covered Loans PercentageOfCoveredLoans	0.00
CY2016Q4	wtfc	Percentage Of Covered Loans PercentageOfCoveredLoans	0.00
CY2017Q3	wtfc	Percentage Of Covered Loans PercentageOfCoveredLoans	0.00
CY2016Q3	wtfc	Percentage Of Loans And Leases Receivable Gross Carrying Amount PercentageOfLoansAndLeasesReceivableGrossCarryingAmount	1
CY2016Q4	wtfc	Percentage Of Loans And Leases Receivable Gross Carrying Amount PercentageOfLoansAndLeasesReceivableGrossCarryingAmount	1
CY2017Q3	wtfc	Percentage Of Loans And Leases Receivable Gross Carrying Amount PercentageOfLoansAndLeasesReceivableGrossCarryingAmount	1
CY2016Q3	wtfc	Percentage Of Loans Net Of Unearned Income Including Covered Loans PercentageOfLoansNetOfUnearnedIncomeIncludingCoveredLoans	1
CY2016Q4	wtfc	Percentage Of Loans Net Of Unearned Income Including Covered Loans PercentageOfLoansNetOfUnearnedIncomeIncludingCoveredLoans	1
CY2017Q3	wtfc	Percentage Of Loans Net Of Unearned Income Including Covered Loans PercentageOfLoansNetOfUnearnedIncomeIncludingCoveredLoans	1
CY2016Q3	wtfc	Proceeds From Calls Of Held To Maturity Securities ProceedsFromCallsOfHeldToMaturitySecurities	141885000	USD
	wtfc	Proceeds From Calls Of Held To Maturity Securities ProceedsFromCallsOfHeldToMaturitySecurities	423866000	USD
CY2017Q3	wtfc	Proceeds From Calls Of Held To Maturity Securities ProceedsFromCallsOfHeldToMaturitySecurities	17000	USD
	wtfc	Proceeds From Calls Of Held To Maturity Securities ProceedsFromCallsOfHeldToMaturitySecurities	51079000	USD
	wtfc	Proceeds From Maturities Of Held To Maturity Securities ProceedsFromMaturitiesOfHeldToMaturitySecurities	502000	USD
	wtfc	Proceeds From Maturities Of Held To Maturity Securities ProceedsFromMaturitiesOfHeldToMaturitySecurities	51282000	USD
	wtfc	Proceeds From Payments To Federal Home Loan Bank Borrowings ProceedsFromPaymentsToFederalHomeLoanBankBorrowings	-440257000	USD
	wtfc	Proceeds From Payments To Federal Home Loan Bank Borrowings ProceedsFromPaymentsToFederalHomeLoanBankBorrowings	313000000	USD
CY2016Q3	wtfc	Provision For Covered Loan Losses Before Benefit Attributable To Fdic Loss Share Agreements ProvisionForCoveredLoanLossesBeforeBenefitAttributableToFdicLossShareAgreements	847000	USD
	wtfc	Provision For Covered Loan Losses Before Benefit Attributable To Fdic Loss Share Agreements ProvisionForCoveredLoanLossesBeforeBenefitAttributableToFdicLossShareAgreements	3495000	USD
CY2017Q3	wtfc	Provision For Covered Loan Losses Before Benefit Attributable To Fdic Loss Share Agreements ProvisionForCoveredLoanLossesBeforeBenefitAttributableToFdicLossShareAgreements	225000	USD
	wtfc	Provision For Covered Loan Losses Before Benefit Attributable To Fdic Loss Share Agreements ProvisionForCoveredLoanLossesBeforeBenefitAttributableToFdicLossShareAgreements	1063000	USD
CY2017Q3	wtfc	Real Estate Acquired Through Foreclosure Fair Value Losses Recognized RealEstateAcquiredThroughForeclosureFairValueLossesRecognized	490000	USD
	wtfc	Real Estate Acquired Through Foreclosure Fair Value Losses Recognized RealEstateAcquiredThroughForeclosureFairValueLossesRecognized	1760000	USD
CY2016Q3	wtfc	Reclassification From Accumulated Other Comprehensive Income Amortizaton Of Unrealized Gains Losses On Investment Securities Transferred To Held To Maturity From Available For Sale Net Of Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeAmortizatonOfUnrealizedGainsLossesOnInvestmentSecuritiesTransferredToHeldToMaturityFromAvailableForSaleNetOfTax	-2295000	USD
	wtfc	Reclassification From Accumulated Other Comprehensive Income Amortizaton Of Unrealized Gains Losses On Investment Securities Transferred To Held To Maturity From Available For Sale Net Of Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeAmortizatonOfUnrealizedGainsLossesOnInvestmentSecuritiesTransferredToHeldToMaturityFromAvailableForSaleNetOfTax	-6707000	USD
CY2017Q3	wtfc	Reclassification From Accumulated Other Comprehensive Income Amortizaton Of Unrealized Gains Losses On Investment Securities Transferred To Held To Maturity From Available For Sale Net Of Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeAmortizatonOfUnrealizedGainsLossesOnInvestmentSecuritiesTransferredToHeldToMaturityFromAvailableForSaleNetOfTax	20000	USD
	wtfc	Reclassification From Accumulated Other Comprehensive Income Amortizaton Of Unrealized Gains Losses On Investment Securities Transferred To Held To Maturity From Available For Sale Net Of Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeAmortizatonOfUnrealizedGainsLossesOnInvestmentSecuritiesTransferredToHeldToMaturityFromAvailableForSaleNetOfTax	900000	USD
CY2016Q3	wtfc	Reclassification From To Allowance For Unfunded Lending Related Commitments ReclassificationFromToAllowanceForUnfundedLendingRelatedCommitments	-579000	USD
	wtfc	Reclassification From To Allowance For Unfunded Lending Related Commitments ReclassificationFromToAllowanceForUnfundedLendingRelatedCommitments	-700000	USD
CY2017Q3	wtfc	Reclassification From To Allowance For Unfunded Lending Related Commitments ReclassificationFromToAllowanceForUnfundedLendingRelatedCommitments	94000	USD
	wtfc	Reclassification From To Allowance For Unfunded Lending Related Commitments ReclassificationFromToAllowanceForUnfundedLendingRelatedCommitments	62000	USD
CY2016Q3	wtfc	Recoveries Of Covered Loans Charged Off RecoveriesOfCoveredLoansChargedOff	775000	USD
	wtfc	Recoveries Of Covered Loans Charged Off RecoveriesOfCoveredLoansChargedOff	3182000	USD
CY2017Q3	wtfc	Recoveries Of Covered Loans Charged Off RecoveriesOfCoveredLoansChargedOff	64000	USD
	wtfc	Recoveries Of Covered Loans Charged Off RecoveriesOfCoveredLoansChargedOff	990000	USD
CY2017Q3	wtfc	Revenues Percentage RevenuesPercentage	0.09
	wtfc	Revenues Percentage RevenuesPercentage	0.10
CY2017Q3	wtfc	Securities By A Single Nongoverment Sponsored Issuer Exceeding Ten Percent Of Shareholders Equity SecuritiesByASingleNongovermentSponsoredIssuerExceedingTenPercentOfShareholdersEquity	0	securities
	wtfc	Stock Issued During Period Value Stock Options And Warrants Exercised StockIssuedDuringPeriodValueStockOptionsAndWarrantsExercised	5773000	USD
	wtfc	Stock Issued During Period Value Stock Options And Warrants Exercised StockIssuedDuringPeriodValueStockOptionsAndWarrantsExercised	20246000	USD
CY2016Q3	wtfc	Trade Date Securities Payable TradeDateSecuritiesPayable	0	USD
CY2016Q4	wtfc	Trade Date Securities Payable TradeDateSecuritiesPayable	0	USD
CY2017Q3	wtfc	Trade Date Securities Payable TradeDateSecuritiesPayable	880000	USD
CY2016Q3	wtfc	Trade Date Securities Receivable TradeDateSecuritiesReceivable	677000	USD
CY2016Q4	wtfc	Trade Date Securities Receivable TradeDateSecuritiesReceivable	0	USD
CY2017Q3	wtfc	Trade Date Securities Receivable TradeDateSecuritiesReceivable	189896000	USD
CY2017Q3	wtfc	Trust Preferred Securities Proportion To Junior Subordinated Debentures TrustPreferredSecuritiesProportionToJuniorSubordinatedDebentures	0.97
CY2016Q3	wtfc	Wealth Management Deposits WealthManagementDeposits	2283233000	USD
CY2016Q4	wtfc	Wealth Management Deposits WealthManagementDeposits	2209617000	USD
CY2017Q3	wtfc	Wealth Management Deposits WealthManagementDeposits	2171758000	USD
CY2016Q3	wtfc	Wealth Management Deposits Percentage WealthManagementDepositsPercentage	0.11
CY2016Q4	wtfc	Wealth Management Deposits Percentage WealthManagementDepositsPercentage	0.10
CY2017Q3	wtfc	Wealth Management Deposits Percentage WealthManagementDepositsPercentage	0.10
CY2016Q3	wtfc	Weighted Average Stated Interest Rate Basis Points WeightedAverageStatedInterestRateBasisPoints	0.0150
	wtfc	Weighted Average Stated Interest Rate Basis Points WeightedAverageStatedInterestRateBasisPoints	0.0030
CY2017Q3	wtfc	Weighted Average Stated Interest Rate Basis Points WeightedAverageStatedInterestRateBasisPoints	0.0225
	wtfc	Weighted Average Stated Interest Rate Basis Points WeightedAverageStatedInterestRateBasisPoints	0.0188

Files In Submission

Name	View Source	Status
0001015328-17-000222-index-headers.html	Edgar Link	pending
0001015328-17-000222-index.html	Edgar Link	pending
0001015328-17-000222.txt	Edgar Link	pending
0001015328-17-000222-xbrl.zip	Edgar Link	pending
exhibit3112017q3.htm	Edgar Link	pending
exhibit3122017q3.htm	Edgar Link	pending
exhibit3212017q3.htm	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xlsx	Edgar Link	pending
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report.css	Edgar Link	pending
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wtfc-20170930.xml	Edgar Link	completed
wtfc-20170930.xsd	Edgar Link	pending
wtfc-20170930x10q.htm	Edgar Link	pending
wtfc-20170930_cal.xml	Edgar Link	unprocessable
wtfc-20170930_def.xml	Edgar Link	unprocessable
wtfc-20170930_lab.xml	Edgar Link	unprocessable
wtfc-20170930_pre.xml	Edgar Link	unprocessable

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$WTFC
WINTRUST FINANCIAL CORP Stock $wtfc

2017 Q4 Form 10-Q Financial Statement

#000101532817000222 Filed on November 08, 2017

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$WTFC WINTRUST FINANCIAL CORP Stock $wtfc

2017 Q4 Form 10-Q Financial Statement

#000101532817000222 Filed on November 08, 2017

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$WTFC
WINTRUST FINANCIAL CORP Stock $wtfc