Revenue from Contract with Customer [Abstract] Disaggregation of Revenue Disaggregation of Revenue [Table Text Block] Investments in Qualified Affordable Housing Partnerships, Tax Credit and Other Investments, Net [Abstract] Investments in Qualified Affordable Housing Partnerships, Tax Credit and Other Investments, Net [Abstract] Minimum compliance period for qualified affordable housing partnerships to fully utilize the tax credits (in years) Minimum Compliance Period to Fully Utilize Tax Credits Represents the minimum compliance period, to meet regulatory requirements for affordable housing, to fully utilize the tax credits. Investments in qualified affordable housing partnerships, net Amortization Method Qualified Affordable Housing Project Investments Accrued expenses and other liabilities — Unfunded commitments Qualified Affordable Housing Project Investments, Commitment Tax credits and other tax benefits recognized Affordable Housing Tax Credits and Other Tax Benefits, Amount Amortization expense included in income tax expense Amortization Method Qualified Affordable Housing Project Investments, Amortization Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Goodwill and Intangible Assets Disclosure [Abstract] Goodwill Goodwill Number of reportable segments Number of Reportable Segments Goodwill impairment Goodwill, Impaired, Accumulated Impairment Loss Changes in the carrying amount of goodwill Goodwill, Period Increase (Decrease) Schedule of goodwill by reporting unit Schedule of Goodwill [Table Text Block] Schedule of gross carrying value of core deposit intangible assets and accumulated amortization Schedule of Finite-Lived Intangible Assets [Table Text Block] Schedule of estimated future amortization expense of core deposit intangibles Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] Accounting Policies [Abstract] Current Accounting Developments New Accounting Pronouncements and Changes in Accounting Principles [Text Block] Statement of Stockholders' Equity [Abstract] Dividends declared per common share (in dollars per share) Common Stock, Dividends, Per Share, Declared Segment Reporting [Abstract] Number of operating segments Number of Operating Segments Number of business segments Number of Business Divisions The total number of business divisions that meet the criteria of an operating segment. Leases [Abstract] Direct Financing and Sales-Type Leases Sales-type and Direct Financing Leases, Lease Receivable, Fiscal Year Maturity [Abstract] Remainder of 2019 Sales-type and Direct Financing Leases, Lease Receivable, Payments to be Received, Remainder of Fiscal Year 2020 Sales-type and Direct Financing Leases, Lease Receivable, Payments to be Received, Two Years 2021 Sales-type and Direct Financing Leases, Lease Receivable, Payments to be Received, Three Years 2022 Sales-type and Direct Financing Leases, Lease Receivable, Payments to be Received, Four Years 2023 Sales-type and Direct Financing Leases, Lease Receivable, Payments to be Received, Five Years Thereafter Sales-type and Direct Financing Leases, Lease Receivable, Payments to be Received, Thereafter Total minimum lease payments Sales-type and Direct Financing Leases, Lease Receivable, Payments to be Received Less: imputed interest Sales-type and Direct Financing Leases, Lease Receivable, Undiscounted Excess Amount Present value of lease receivables Sales-type and Direct Financing Leases, Lease Receivable Derivative Instruments and Hedging Activities Disclosure [Abstract] Derivative [Table] Derivative [Table] Derivative, Risk Category [Axis] Derivative, Risk Category [Axis] Derivative, Risk Category [Axis] Derivative, Risk Category [Domain] Derivative, Risk Category [Domain] [Domain] for Derivative, Risk Category [Axis] Credit contracts Credit Risk Contract [Member] Hedging Designation [Axis] Hedging Designation [Axis] Hedging Designation [Domain] Hedging Designation [Domain] Derivatives not designated as hedging instruments Not Designated as Hedging Instrument [Member] Derivative Instrument [Axis] Derivative Instrument [Axis] Derivative Contract [Domain] Derivative Contract [Domain] Credit contracts Position [Axis] Position [Axis] Position [Domain] Position [Domain] RPA protection sold Long [Member] RPA protection purchased Short [Member] Derivative [Line Items] Derivative [Line Items] Notional amount Derivative, Notional Amount Derivative assets - Fair value Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement Derivative liabilities - Fair value Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement Stockholders' Equity and Earnings Per Share [Abstract] Stockholders' Equity and Earnings Per Share [Abstract] Stockholders' Equity and Earnings Per Share Stockholders Equity and Earnings Per Share Note Disclosure [Text Block] The entire disclosure for shareholders' equity and earnings per share, comprised of portions attributable to the parent entity and noncontrolling interest, if any. Subsequent Events [Abstract] Subsequent Events Subsequent Events [Text Block] Statement [Table] Statement [Table] Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Common Stock Common Stock [Member] Common Stock and Additional Paid-In Capital Common Stock Including Additional Paid in Capital [Member] Retained Earnings Retained Earnings [Member] Treasury Stock Treasury Stock [Member] AOCI, Net of Tax AOCI Attributable to Parent [Member] Statement [Line Items] Statement [Line Items] Increase (Decrease) in Stockholders' Equity Increase (Decrease) in Stockholders' Equity [Roll Forward] Beginning balance Stockholders' Equity Attributable to Parent Beginning balance (in shares) Shares, Outstanding Cumulative effect of a change in accounting principle Cumulative Effect of New Accounting Principle in Period of Adoption Reclassification of tax effects in AOCI resulting from the new federal corporate income tax rate Tax Cuts and Jobs Act, Reclassification from AOCI to Retained Earnings, Tax Effect Net income Net Income (Loss) Attributable to Parent Other comprehensive income (loss) Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Warrants exercised Stock Issued During Period, Value, Warrants Exercised Stock Issued During Period, Value, Warrants Exercised Warrants exercised (in shares) Common Stock, Shares Issued on Warrant Exercise Common Stock, Shares Issued on Warrant Exercise Net activity of common stock pursuant to various stock compensation plans and agreements Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture Net activity of common stock pursuant to various stock compensation plans and agreements (in shares) Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture Cash dividends on common stock Dividends, Common Stock, Cash Ending balance Ending balance (in shares) Fair Value Disclosures [Abstract] Fair Value Measurement Inputs and Valuation Techniques [Table] Fair Value Measurement Inputs and Valuation Techniques [Table] Measurement Input Type [Axis] Measurement Input Type [Axis] Measurement Input Type [Domain] Measurement Input Type [Domain] Equity volatility Measurement Input, Price Volatility [Member] Liquidity discount Measurement Input, Discount for Lack of Marketability [Member] Discount Measurement Input, Discount Rate [Member] Selling cost Measurement Input, Cost to Sell [Member] Equity warrants Equity Contract [Member] Asset Class [Axis] Asset Class [Axis] Asset Class [Domain] Asset Class [Domain] Non-PCI Loans Receivables Originated Or Acquired Without Deteriorated Credit Quality [Member] Receivables originated by the entity or purchased with no evidence of credit deterioration at acquisition. OREO Other Real Estate Owned [Member] Represents other real estate owned. Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Significant Unobservable Inputs (Level 3) Fair Value, Inputs, Level 3 [Member] Valuation Approach and Technique [Axis] Valuation Approach and Technique [Axis] Valuation Approach and Technique [Domain] Valuation Approach and Technique [Domain] Black-Scholes option pricing model Black-Scholes Option Pricing Model [Member] Black-Scholes Option Pricing Model [Member] Discounted cash flows Valuation, Income Approach [Member] Fair value of collateral, discount Valuation Technique, Fair Value Of Collateral Discount [Member] Valuation Technique, Fair Value Of Collateral Discount [Member] Fair value of property, selling cost Valuation Technique, Fair Value Of Valuation Technique, Fair Value Of Property, Selling Cost [Member] Valuation Technique, Fair Value Of Property, Selling Cost Individual analysis of each investment, expected future tax benefits and distributions Valuation Technique, Individual Analysis [Member] Valuation Technique, Individual Analysis [Member] Fair value of collateral, contract value Valuation Technique, Fair Value Of Collateral, Contract Value [Member] Valuation Technique, Fair Value Of Collateral, Contract Value [Member] Measurement Frequency [Axis] Measurement Frequency [Axis] Measurement Frequency [Domain] Measurement Frequency [Domain] Fair Value, Measurements, Recurring Fair Value, Recurring [Member] Fair Value, Measurements, Nonrecurring Fair Value, Nonrecurring [Member] Statistical Measurement [Axis] Statistical Measurement [Axis] Statistical Measurement [Domain] Statistical Measurement [Domain] Weighted Average Weighted Average [Member] Minimum Minimum [Member] Maximum Maximum [Member] Quantitative information Fair Value Measurement Inputs and Valuation Techniques [Line Items] Measurement input Equity Warrants, Measurement Input Equity Warrants, Measurement Input Non-PCI impaired loans Impaired Loans, Fair Value Disclosure Impaired Loans, Fair Value Disclosure OREO Assets, Fair Value Disclosure Investments in tax credit and other investments, net Impaired Tax Credit Investment, Fair Value Disclosure Impaired Tax Credit Investment, Fair Value Disclosure Non-PCI impaired loans, measurement input Non-PCI Impaired Loans, Measurement Input Non-PCI Impaired Loans, Measurement Input OREO, measurement input Fair Value Inputs Selling Cost Represents selling cost used as an input to measure fair value. Derivative Instruments, Gain (Loss) [Table] Derivative Instruments, Gain (Loss) [Table] Interest rate contracts Interest Rate Contract [Member] Foreign exchange contracts Foreign Exchange Contract [Member] Equity contracts Commodity contracts Commodity Contract [Member] Income Statement Location [Axis] Income Statement Location [Axis] Income Statement Location [Domain] Income Statement Location [Domain] Interest rate contracts and other derivative income Interest rate contracts and other derivative income [Member] Interest rate contracts and other derivative income [Member] Foreign exchange income Foreign Currency Gain (Loss) [Member] Lending fees Lending fees [Member] Lending fees [Member] Derivative Instruments, Gain (Loss) [Line Items] Derivative Instruments, Gain (Loss) [Line Items] Net gains (losses) recognized for derivative not designated as hedging instruments Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net Fair Value, Recurring and Nonrecurring [Table] Fair Value, Recurring and Nonrecurring [Table] Non-PCI impaired loans Class of Financing Receivable [Axis] Class of Financing Receivable [Axis] Class of Financing Receivable [Domain] Class of Financing Receivable [Domain] Commercial and industrial (“C&I”) Commercial And Industrial Loan [Member] Commercial And Industrial Loan [Member] Commercial real estate (“CRE”) Commercial Real Estate [Member] Real estate loan Real Estate Loan [Member] HELOCs Home Equity Line of Credit [Member] Quoted Prices in Active Markets for Identical Assets (Level 1) Fair Value, Inputs, Level 1 [Member] Significant Other Observable Inputs (Level 2) Fair Value, Inputs, Level 2 [Member] Financing Receivable Portfolio Segment [Axis] Financing Receivable Portfolio Segment [Axis] Financing Receivable Portfolio Segment [Domain] Financing Receivable Portfolio Segment [Domain] Commercial lending Commercial Portfolio Segment [Member] Consumer lending Consumer Portfolio Segment [Member] Real Estate, Type of Property [Axis] Real Estate, Type of Property [Axis] Real Estate [Domain] Real Estate [Domain] Single-family residential Single Family [Member] Fair Value, Assets Measured on a Nonrecurring Basis Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Hedging Relationship [Axis] Hedging Relationship [Axis] Hedging Relationship [Domain] Hedging Relationship [Domain] Fair Value Hedging Fair Value Hedging [Member] Derivative instruments designated as hedging instruments Designated as Hedging Instrument [Member] Interest Expense Interest Expense [Member] Interest rate contracts Interest Rate Swap [Member] Cash and Cash Equivalents [Axis] Cash and Cash Equivalents [Axis] Cash and Cash Equivalents [Domain] Cash and Cash Equivalents [Domain] Certificates of deposits Certificates of Deposit [Member] Recognized on interest rate swaps Change in Unrealized Gain (Loss) on Fair Value Hedging Instruments Recognized on certificates of deposit Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge Investments in Tax Credit and Other Investments, Net [Table] Investments in Tax Credit and Other Investments, Net [Table] Investments in Tax Credit and Other Investments, Net [Table] Investment, Name [Axis] Investment, Name [Axis] Investment, Name [Domain] Investment, Name [Domain] DC Solar Tax Credit Investments DC Solar Tax Credit Investments [Member] DC Solar Tax Credit Investments [Member] Amortization of tax credit and other investments Amortization of Tax Credit And Other Investments [Member] Amortization of Tax Credit And Other Investments [Member] Balance Sheet Location [Axis] Balance Sheet Location [Axis] Balance Sheet Location [Domain] Balance Sheet Location [Domain] Tax credit investments Investments In Tax Credit And Other Investments, Net [Member] Investments In Tax Credit And Other Investments, Net [Member] Accrued expenses and other liabilities - unfunded commitments Accrued Expenses And Other Liabilities, Unfunded Commitments [Member] Accrued Expenses And Other Liabilities, Unfunded Commitments [Member] Investments in Tax Credit and Other Investments, Net [Line Items] Investments in Tax Credit and Other Investments, Net [Line Items] [Line Items] for Investments in Tax Credit and Other Investments, Net [Table] Number of solar energy tax credit funds Number Of Tax Credit Funds Number Of Tax Credit Funds Investments in tax credit and other investments, net Investments in Tax Credit and Other Investments, Net Represents the net amount of investments in the projects, excluding affordable housing projects, that qualify for Community Reinvestment Act (CRA) credits or other types of tax credits. Accrued expenses and other liabilities — Unfunded commitments Other Tax Credit Investments, Commitment Amount of commitment or contingent commitments to investments in certain limited partnerships that qualify for Community Reinvestment Act (CRA) credits or other types of tax credits. Amortization expense of tax credit and other investments Noninterest Expense, Amortization of Tax Credit Investments Amortization of investments in projects that qualify for Community Reinvestment Act ("CRA") and other tax credits, included as a component of noninterest expense. Marketable equity securities Equity Securities, FV-NI Unrealized gains (losses) recognized on marketable equity securities held Marketable Securities, Unrealized Gain (Loss) Pre-tax impairment charge Tax Credit Investments, Pre-tax Impairment Charge Tax Credit Investments, Pre-tax Impairment Charge Loss Contingencies [Table] Loss Contingencies [Table] Single Family Residential Single Family Residential [Member] Single Family Residential [Member] Multifamily Residential Multifamily Residential [Member] Multifamily Residential [Member] Single Family and Multi-family Residential Single Family Residential And Multi-Family Residential [Member] Single Family Residential and Multi-family Residential [Member] Type of Guarantees [Axis] Type of Guarantees [Axis] Type of Guarantees [Axis] Type of Guarantees [Domain] Type of Guarantees [Domain] [Domain] for Type of Guarantees [Axis] Loans Sold or Securitized With Recourse Loans Sold or Securitized With Recourse [Member] Loans Sold or Securitized With Recourse [Member] Loss Contingency Nature [Axis] Loss Contingency Nature [Axis] Loss Contingency, Nature [Domain] Loss Contingency, Nature [Domain] Loans Sold or Securitized with Recourse Guarantee Obligations [Member] Guarantees Loss Contingencies [Line Items] Maximum Potential Future Payments Guarantor Obligations, Maximum Exposure, Undiscounted Carrying Value Guarantor Obligations, Current Carrying Value Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Product and Service [Axis] Product and Service [Axis] Product and Service [Domain] Product and Service [Domain] Deposit service charges and related fee income Deposit Service Charges And Related Fee Income [Member] Deposit Service Charges And Related Fee Income [Member] Card income Card Income [Member] Card Income [Member] Wealth management fees Wealth Management Fees [Member] Wealth Management Fees [Member] Segments [Axis] Segments [Axis] Segments [Domain] Segments [Domain] Consumer and Business Banking Consumer and Business Banking [Member] A component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements. Commercial Banking Commercial Banking [Member] A component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements. Other Other Segments [Member] Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Revenue from contracts with customers Revenue from Contract with Customer, Excluding Assessed Tax Other sources of noninterest income Other Sources Of Noninterest Income Other sources of noninterest income not derived from contracts with customers. Total noninterest income Noninterest Income Contract with customer, asset, net Contract with Customer, Asset, after Allowance for Credit Loss Contracts with customers, receivables, net Contracts with Customers, Receivables, Net Contracts with Customers, Receivables, Net Loans and Leases Receivable Disclosure [Abstract] Financing Receivable, Troubled Debt Restructuring [Table] Financing Receivable, Troubled Debt Restructuring [Table] Credit Loss Status [Axis] Credit Loss Status [Axis] Credit Loss Status [Domain] Credit Loss Status [Domain] Loans Modified as TDRs Financing Receivable, Troubled Debt Restructuring [Line Items] Number of Loans Financing Receivable, Modifications, Number of Contracts Pre- Modification Outstanding Recorded Investment Financing Receivable, Troubled Debt Restructuring, Premodification Post- Modification Outstanding Recorded Investment Financing Receivable, Troubled Debt Restructuring, Postmodification Financial Impact Financing Receivables, Impaired, Troubled Debt Restructuring, Write-down Equity [Abstract] Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income (Loss) [Table] Scenario [Axis] Scenario [Axis] Scenario [Domain] Scenario [Domain] Scenario, Adjustment Scenario, Adjustment [Member] Available- for-Sale Investment Securities AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent [Member] Foreign Currency Translation Adjustments Accumulated Foreign Currency Adjustment Attributable to Parent [Member] Adjustments for New Accounting Pronouncements [Axis] Adjustments for New Accounting Pronouncements [Axis] Type of Adoption [Domain] Type of Adoption [Domain] ASU 2016-01 Accounting Standards Update 2016-01 [Member] ASU 2018-02 Accounting Standards Update 2018-02 [Member] Accumulated Other Comprehensive Income (Loss) [Line Items] Accumulated Other Comprehensive Income (Loss) [Line Items] AOCI Attributable to Parent, Net of Tax [Roll Forward] AOCI Attributable to Parent, Net of Tax [Roll Forward] Reclassification of tax effects in AOCI resulting from the new federal corporate income tax rate Net unrealized gains (losses) arising during the period OCI, before Reclassifications, Net of Tax, Attributable to Parent Amounts reclassified from AOCI Reclassification from AOCI, Current Period, Net of Tax, Attributable to Parent Other comprehensive income (loss) Fair Value, Financial Assets and Liabilities Measured on Recurring and Nonrecurring Basis Schedule of financial assets (liabilities) measured at fair value on a recurring basis Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Reconciliation of the beginning and ending balances for warrants measured at fair value on a recurring basis using significant unobservable inputs (Level 3) Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] Schedule of quantitative information about significant unobservable inputs used in the valuation of assets classified as Level 3 Fair Value Measurement Inputs and Valuation Techniques [Table Text Block] Schedule of assets with fair value changes measured on a nonrecurring basis Fair Value Measurements, Nonrecurring [Table Text Block] Schedule of increase (decrease) in value of assets for which a fair value adjustment has been included on the Consolidated Statement of Income, nonrecurring basis Fair Value Adjustment of Financial Assets on Nonrecurring Basis [Table Text Block] Tabular disclosure of the increase (decrease) in value of financial assets that are measured at fair value on a nonrecurring basis for which a fair value adjustment has been included in the income statement. Schedule of the carrying and fair values per the fair value hierarchy of financial instruments measured on a nonrecurring basis Fair Value, by Balance Sheet Grouping [Table Text Block] Investments, Debt and Equity Securities [Abstract] Schedule of Other Than Temporary Impairment, Credit Losses Recognized in Earnings [Table] Schedule of Other than Temporary Impairment, Credit Losses Recognized in Earnings [Table] Financial Instrument [Axis] Financial Instrument [Axis] Financial Instruments [Domain] Financial Instruments [Domain] Foreign bonds Foreign Government And Corporate Debt Securities [Member] Foreign Government And Corporate Debt Securities [Member] U.S. government agency and U.S. government sponsored enterprise mortgage-backed securities Mortgage Backed Securities Issued By US Government Agencies And Government Sponsored Enterprise [Member] Mortgage Backed Securities Issued By US Government Agencies And Government Sponsored Enterprise [Member] U.S. Treasury securities US Treasury Securities [Member] Debt Security Category [Axis] Debt Security Category [Axis] Other Than Temporary Impairment Credit Losses Recognized in Earnings, Categories of Investments [Domain] Other than Temporary Impairment, Credit Losses Recognized in Earnings, Categories of Investments [Domain] Investment securities available-for-sale Available-for-sale Securities [Member] Other Than Temporary Impairment Credit Losses Recognized in Earnings Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items] Number of available-for-sale debt securities in an unrealized loss position Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions OTTI credit losses Other than Temporary Impairment, Credit Losses Recognized in Earnings, Additions, No Previous Impairment Schedule of credit-related commitments Schedule of Unfunded Commitments and Credit Exposures [Table Text Block] Tabular disclosure of outstanding commitments to extend credit that are not reflected in the consolidated financial statements. Schedule of guarantees outstanding Schedule of Guarantor Obligations [Table Text Block] Schedule of Accounts, Notes, Loans and Financing Receivable [Table] Schedule of Accounts, Notes, Loans and Financing Receivable [Table] PCI Loans Financial Asset Acquired with Credit Deterioration [Member] Construction and land Construction And Land Loan [Member] Class of financing receivables related to construction and land. Other consumer Other Consumer [Member] Class of financing receivable related to consumer loans, except for residential single-family loans and HELOCs Multifamily residential Multifamily [Member] LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES Accounts, Notes, Loans and Financing Receivable [Line Items] Loans held-for-investment Financing Receivable, before Allowance for Credit Loss Allowance for loan losses Financing Receivable, Allowance for Credit Loss Loans held-for-investment, net Loans and Leases Receivable, Net Amount Net deferred loan fees, unearned fees, unamortized premiums and unaccreted discounts Unamortized Loan Commitment and Origination Fees and Unamortized Discounts or Premiums Discount related to ASC 310-30 Financing Receivable, Discount Financing Receivable, Discount Equity contracts Warrant [Member] Equity, Public Companies Equity, Public Companies [Member] Equity, Public Companies [Member] Equity, Private Companies Equity, Private Companies [Member] Equity, Private Companies [Member] Credit-risk-related contingent features Credit-Risk-Related Contingent Features [Member] Credit-Risk-Related Contingent Features [Member] Counterparty Name [Axis] Counterparty Name [Axis] Counterparty Name [Domain] Counterparty Name [Domain] LCH London Clearing House [Member] London Clearing House Financial Counterparty Financial Counterparty [Member] Financial Counterparty [Member] Chicago Mercantile Exchange (CME) Chicago Mercantile Exchange (CME) [Member] Chicago Mercantile Exchange (CME) [Member] Energy [Axis] Energy [Axis] Energy [Domain] Energy [Domain] Oil Oil [Member] Natural gas Natural Gas [Member] Derivative asset Derivative Asset, Fair Value, Gross Asset Derivative liability Derivative Liability, Fair Value, Gross Liability Original maturity (in years) Derivative, Original Maturity Derivative, Original Maturity Maximum exposure of RPAs with protection sold Credit Derivative, Maximum Exposure, Undiscounted Weighted average remaining maturity of outstanding RPAs Derivative, Average Remaining Maturity Number of companies that issued the equity (issuers portion only) Number of Companies that Issued the Warrants (Issuers Portion Only) Number of Companies that Issued the Warrants (Issuers Portion Only) Derivative assets (liabilities), at fair value, net Derivative Assets (Liabilities), at Fair Value, Net Derivative, nonmonetary notional amount, energy measure Derivative, Nonmonetary Notional Amount, Energy Measure Aggregate fair value of derivative instruments in net liability position Derivative, Net Liability Position, Aggregate Fair Value Collateral posted Collateral Already Posted, Aggregate Fair Value Dispositions Classification [Abstract] Dispositions [Abstract] Dispositions Divestiture Of Businesses [Text Block] Divestiture Of Businesses [Text Block] Financing Receivable, Troubled Debt Restructuring [Line Items] Period beyond which a TDR generally becomes delinquent Number of Days Troubled Debt Restructurings Become Delinquent Duration of delinquency related to troubled debt restructuring loans where it becomes a nonaccrual loan and is considered to have defaulted. Number of Loans Financing Receivable, Troubled Debt Restructuring, Subsequent Default, Number of Contracts Recorded Investment Financing Receivable, Troubled Debt Restructuring, Subsequent Default Additional funds committed to lend to borrowers whose terms have been modified Financing Receivable, Troubled Debt Restructuring, Commitment to Lend Schedule of Available-for-sale Securities [Table] Schedule of Available-for-sale Securities [Table] U.S. government agency and U.S. government sponsored enterprise debt securities US Government-sponsored Enterprises Debt Securities [Member] U.S. government agency and U.S. government sponsored enterprise mortgage-backed securities - Commercial mortgage-backed securities Commercial Mortgage Backed Securities Issued By US Government Agencies And Government Sponsored Enterprise [Member] Debt securities collateralized by commercial real estate mortgage loans (mortgages), issued by US Government Agencies, such as the Government National Mortgage Association (GNMA or Ginnie Mae). Includes debt securities issued by Government Sponsored Enterprises, such as the Federal Home Loan Mortgage Corporation (FHLMC or Freddie Mac), Federal National Mortgage Association (FNMA or Fannie Mae), and the Federal Home Loan Bank (FHLB). U.S. government agency and U.S. government sponsored enterprise mortgage-backed securities - Residential mortgage-backed securities Residential Mortgage Backed Securities Issued By US Government Agencies And Government Sponsored Enterprise [Member] Debt securities collateralized by residential real estate mortgage loans (mortgages), issued by US Government Agencies, such as the Government National Mortgage Association (GNMA or Ginnie Mae). Includes debt securities issued by Government Sponsored Enterprises, such as the Federal Home Loan Mortgage Corporation (FHLMC or Freddie Mac), Federal National Mortgage Association (FNMA or Fannie Mae), and the Federal Home Loan Bank (FHLB). Municipal securities US States and Political Subdivisions Debt Securities [Member] Non-agency commercial mortgage-backed securities Commercial Mortgage Backed Securities [Member] Non-agency residential mortgage-backed securities Residential Mortgage Backed Securities [Member] Corporate debt securities Corporate Debt Securities [Member] Asset-backed securities Asset-backed Securities [Member] Schedule of Available-for-sale Debt Securities Debt Securities, Available-for-sale [Line Items] Total available-for-sale debt investment securities, Amortized Cost Debt Securities, Available-for-sale, Amortized Cost Gross Unrealized Gains Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax Gross Unrealized Losses Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax Available-for-sale debt securities, Fair Value Debt Securities, Available-for-sale Derivatives Derivative Instruments and Hedging Activities Disclosure [Text Block] Schedule of Impaired Financing Receivable [Table] Schedule of Impaired Financing Receivable [Table] Impaired loans disclosures Financing Receivable, Impaired [Line Items] Unpaid Principal Balance Impaired Financing Receivable, Unpaid Principal Balance Recorded Investment With No Allowance Impaired Financing Receivable, with No Related Allowance, Recorded Investment Recorded Investment With Allowance Impaired Financing Receivable, with Related Allowance, Recorded Investment Total Recorded Investment Impaired Financing Receivable, Recorded Investment Related Allowance Impaired Financing Receivable, Related Allowance Average Recorded Investment Impaired Financing Receivable, Average Recorded Investment Recognized Interest Income Impaired Financing Receivable, Interest Income, Accrual Method Loan Restructuring Modification [Axis] Loan Restructuring Modification [Axis] Loan Restructuring Modification [Domain] Loan Restructuring Modification [Domain] Principal Principal Forbearance Payments, Term Extensions, Principal Deferments [Member] Principal Forbearance Payments, Term Extensions, Principal Deferments [Member] Interest Rate Reduction Contractual Interest Rate Reduction [Member] Other (2) Other Modifications [Member] Other Modifications [Member] Schedule of notional and gross fair values of derivatives Schedule of Derivative Instruments [Table Text Block] Schedule of net gains (losses) recognized on the Consolidated Statement of Income related to derivatives designated as fair value hedge Schedule Of Fair Value Hedge Gain (Loss) In Statement Of Financial Performance [Table Text Block] Schedule Of Fair Value Hedge Gain (Loss) In Statement Of Financial Performance [Table Text Block] Schedule of the carrying amount and associated cumulative basis adjustment related to the application of fair value hedge accounting that is included in the carrying amount of the hedged certificates of deposit Hedged Items In Fair Value Hedging Relationship [Table Text Block] Table shows the carrying amount and associated cumulative basis adjustment related to the application of hedge accounting that is included in the carrying amount of hedged assets and liabilities in fair value hedging relationships. [Table Text Block] Tabular disclosure of gains and losses on derivative instruments qualified and designated in net investment hedges Schedule of Derivative Instruments, Gain (Loss) Of Net Investment Hedges [Table Text Block] Schedule of Derivative Instruments, Gain (Loss) Of Net Investment Hedges [Table Text Block] Schedule of the net (losses) gains recognized on the Company’s Consolidated Statement of Income related to derivatives not designated as hedging instruments Gains (Losses) On Derivatives Not Designated As Hedging Instruments Under GAAP [Table Text Block] Gains (Losses) On Derivatives Not Designated As Hedging Instruments Under GAAP Schedule of gross derivative fair values, the balance sheet netting adjustments and the resulting net fair values recorded on the consolidated balance sheet, as well as the cash and non-cash collateral associated with master netting arrangements Offsetting Derivative Assets And Liabilities [Table Text Block] Tabular disclosure of derivatives that are subject to offsetting, including master netting arrangements. Operating Leases Lessee, Operating Lease, Liability, Payment, Due [Abstract] Remainder of 2019 Lessee, Operating Lease, Liability, Payments, Remainder of Fiscal Year 2020 Lessee, Operating Lease, Liability, Payments, Due Year Two 2021 Lessee, Operating Lease, Liability, Payments, Due Year Three 2022 Lessee, Operating Lease, Liability, Payments, Due Year Four 2023 Lessee, Operating Lease, Liability, Payments, Due Year Five Thereafter Lessee, Operating Lease, Liability, Payments, Due after Year Five Total minimum lease payments Lessee, Operating Lease, Liability, Payments, Due Less: imputed interest Lessee, Operating Lease, Liability, Undiscounted Excess Amount Present value of lease liabilities Operating Lease, Liability Finance Leases Finance Lease, Liability, Payment, Due [Abstract] Remainder of 2019 Finance Lease, Liability, Payments, Remainder of Fiscal Year 2020 Finance Lease, Liability, Payments, Due Year Two 2021 Finance Lease, Liability, Payments, Due Year Three 2022 Finance Lease, Liability, Payments, Due Year Four 2023 Finance Lease, Liability, Payments, Due Year Five Thereafter Finance Lease, Liability, Payments, Due after Year Five Total minimum lease payments Finance Lease, Liability, Payment, Due Less: imputed interest Finance Lease, Liability, Undiscounted Excess Amount Present value of lease liabilities Finance Lease, Liability Income Tax Disclosure [Abstract] Schedule of Income Tax Expense and Effective Tax Rate Schedule Of Income Tax Expense And Effective Rate [Table Text Block] Schedule Of Income Tax Expense And Effective Rate [Table Text Block] Schedule of Acquired Finite-Lived Intangible Asset by Major Class [Table] Schedule of Acquired Finite-Lived Intangible Asset by Major Class [Table] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Core Deposit Intangibles Core Deposits [Member] Acquired Finite-Lived Intangible Assets [Line Items] Acquired Finite-Lived Intangible Assets [Line Items] Amortization expense Amortization of Intangible Assets Year Ended December 31, Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract] Remainder of 2019 Finite-Lived Intangible Assets, Amortization Expense, Remainder of Fiscal Year 2020 Finite-Lived Intangible Assets, Amortization Expense, Year Two 2021 Finite-Lived Intangible Assets, Amortization Expense, Year Three 2022 Finite-Lived Intangible Assets, Amortization Expense, Year Four 2023 Finite-Lived Intangible Assets, Amortization Expense, Year Five Thereafter Finite-Lived Intangible Assets, Amortization Expense, after Year Five Net carrying balance Finite-Lived Intangible Assets, Net Schedule of the changes in components of accumulated other comprehensive income (loss) balances Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Schedule of components of other comprehensive income (loss), reclassifications to net income and the related tax effects Comprehensive Income (Loss) [Table Text Block] Statement of Cash Flows [Abstract] CASH FLOWS FROM OPERATING ACTIVITIES Net Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to reconcile net income to net cash provided by operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Depreciation and amortization Depreciation, Depletion and Amortization Accretion of discount and amortization of premiums, net Accretion Amortization of Discount and Premiums, Net Accretion of discount and amortization of premiums related to investment securities, loans receivables, and borrowings. Stock compensation costs Share-based Payment Arrangement, Noncash Expense Deferred income tax (benefit) expense Deferred Income Tax Expense (Benefit) Provision for credit losses Provision for Loan, Lease, and Other Losses Net gains on sales of loans Gain (Loss) on Sales of Loans, Net Net gains on sales of available-for-sale investment securities Debt Securities, Available-for-sale, Realized Gain (Loss), Excluding Other-than-temporary Impairment Net gains on sales of fixed assets Gain (Loss) on Disposition of Property Plant Equipment Net gain on sale of business Gain (Loss) on Disposition of Business Loans held-for-sale: Loans Held for Sale, Operating [Abstract] Loans Held for Sale, Operating [Abstract] Originations and purchases Payments for Origination and Purchases of Loans Held-for-sale Proceeds from sales and paydowns/payoffs of loans originally classified as held-for-sale Proceeds from Sale and Collection of Loans Held-for-sale Proceeds from distributions received from equity method investees Proceeds from Equity Method Investment, Distribution Net change in accrued interest receivable and other assets Increase (Decrease) in Other Operating Assets Net change in accrued expenses and other liabilities Increase (Decrease) in Accrued Liabilities and Other Operating Liabilities Other net operating activities Other Operating Activities, Cash Flow Statement Total adjustments Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities Net cash provided by operating activities Net Cash Provided by (Used in) Operating Activities CASH FLOWS FROM INVESTING ACTIVITIES Net Cash Provided by (Used in) Investing Activities, Continuing Operations [Abstract] Net (increase) decrease in: Net Increase (Decrease) in [Abstract] abstract Investments in qualified affordable housing partnerships, tax credit and other investments Payments or (Proceeds from) Qualified Affordable Housing Partnerships and Other Tax Credit Investments The net cash outflow or inflow for the increase (decrease) in investments in qualified affordable housing partnerships and other investments that qualify for Community Reinvestment Act (CRA) credits or other types of tax credits. Interest-bearing deposits with banks Proceeds from (Payments for) in Interest-bearing Deposits in Banks Resale agreements: Resale Agreements [Abstract] Resale Agreements [Abstract] Proceeds from paydowns and maturities Proceeds from Securities Purchased under Agreements to Resell Purchases Payments for Securities Purchased under Agreements to Resell Available-for-sale investment securities: Available for Sale Investment Securities [Abstract] Available for Sale Investment Securities [Abstract] Proceeds from sales Proceeds from Sale of Debt Securities, Available-for-sale Proceeds from repayments, maturities and redemptions Proceeds from Maturities, Prepayments and Calls of Debt Securities, Available-for-sale Purchases Payments to Acquire Debt Securities, Available-for-sale Loans held-for-investment: Loans Held for Sale, Financing [Abstract] Loans Held for Sale, Financing [Abstract] Proceeds from sales of loans originally classified as held-for-investment Proceeds from Sale of Loans Receivable Purchases Payments to Acquire Loans Receivable Other changes in loans held-for-investment, net Payments for (Proceeds from) Loans and Leases Premises and equipment: Proceeds from Sale of [Abstract] Purchases Payments to Acquire Property, Plant, and Equipment Payment on sale of business, net of cash transferred Net Cash Outflow On Sale Of Business The net cash outflow associated with the sale of a business during the period. Proceeds from sales of other real estate owned (“OREO”) Proceeds from Sale of Other Real Estate Proceeds from distributions received from equity method investees Proceeds from Equity Method Investment, Distribution, Return of Capital Other net investing activities Payments for (Proceeds from) Other Investing Activities Net cash used in investing activities Net Cash Provided by (Used in) Investing Activities CASH FLOWS FROM FINANCING ACTIVITIES Net Cash Provided by (Used in) Financing Activities [Abstract] Net increase in deposits Increase (Decrease) in Deposits Net (decrease) increase in short-term borrowings Proceeds from (Repayments of) Short-term Debt Proceeds Proceeds from FHLBank Borrowings, Financing Activities Repayment Payments of FHLBank Borrowings, Financing Activities Repayments of finance lease liabilities Finance Lease, Principal Payments Repayment of long-term debt Repayments of Long-term Debt Common stock: Common Stock [Abstract] Common Stock [Abstract] Proceeds from issuance pursuant to various stock compensation plans and agreements Proceeds, Issuance of Shares, Share-based Payment Arrangement, Including Option Exercised Stock tendered for payment of withholding taxes Payment, Tax Withholding, Share-based Payment Arrangement Cash dividends paid Payments of Ordinary Dividends Net cash provided by financing activities Net Cash Provided by (Used in) Financing Activities Effect of exchange rate changes on cash and cash equivalents Effect of Exchange Rate on Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents NET INCREASE IN CASH AND CASH EQUIVALENTS Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents CASH AND CASH EQUIVALENTS, END OF PERIOD SUPPLEMENTAL CASH FLOW INFORMATION Supplemental Cash Flow Information [Abstract] Cash paid during the period for: Cash Paid During Period for [Abstract] Interest Interest Paid, Excluding Capitalized Interest, Operating Activities Income taxes, net Income Taxes Paid, Net Noncash investing and financing activities: Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] Loans transferred from held-for-investment to held-for-sale Transfer of Portfolio Loans and Leases to Held-for-sale RESALE AND REPURCHASE AGREEMENTS [Abstract] RESALE AND REPURCHASE AGREEMENTS [Abstract] Schedule of gross repurchase agreements maturities Schedule of Repurchase Agreements Maturities [Table Text Block] Schedule of Repurchase Agreements Maturities [Table Text Block] Schedule of balance sheet offsetting for resale and repurchase agreements Schedule of Securities Financing Transactions [Table Text Block] Fair Value Measurement and Fair Value of Financial Instruments Fair Value Disclosures [Text Block] Fair Value, by Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping [Table] Measurement Basis [Axis] Measurement Basis [Axis] Fair Value Measurement [Domain] Fair Value Measurement [Domain] Portion at Fair Value Measurement [Member] Portion at Fair Value Measurement [Member] Carrying Amount Reported Value Measurement [Member] Estimated Fair Value Estimate of Fair Value Measurement [Member] Summary of carrying amounts and fair values of the Company's financial instruments Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Financial assets: Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Interest-bearing deposits with banks Interest Bearing Deposits With Banks Interest-bearing deposits with banks include cash placed with other banks with original maturities greater than three months and less than one year. Resale agreements Securities Purchased under Agreements to Resell Restricted equity securities, at cost Federal Home Loan Bank Stock and Federal Reserve Bank Stock Loans held-for-sale Loans Receivable Held-for-sale, Net, Not Part of Disposal Group Loans held-for-investment, net Mortgage servicing rights Servicing Asset at Amortized Cost Accrued interest receivable Interest Receivable Financial liabilities: Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract] Demand, checking, savings and money market deposits Core Deposits The aggregate of all deposit liabilities held by the entity excluding time deposits. Time deposits Time Deposits Short-term borrowings Short-term Debt FHLB advances Advances from Federal Home Loan Banks Repurchase agreements Securities Sold under Agreements to Repurchase Long-term debt Long-term Debt Accrued interest payable Interest Payable Carrying amount of repurchase agreements eligible for netting against resale agreements Securities Sold under Agreements to Repurchase, Asset Gross repurchase agreements Securities Sold under Agreements to Repurchase, Gross Securities Purchased under Resale Agreements and Sold under Repurchase Agreements Repurchase Agreements, Resale Agreements, Securities Borrowed, and Securities Loaned Disclosure [Text Block] Income Statement [Abstract] INTEREST AND DIVIDEND INCOME Interest and Dividend Income, Operating [Abstract] Loans receivable, including fees Interest and Fee Income, Loans and Leases Available-for-sale investment securities Interest Income, Debt Securities, Available-for-sale, Operating Resale agreements Interest Income, Securities Purchased under Agreements to Resell Restricted equity securities Dividend Income, Investments in Federal Home Loan Bank and Federal Reserve Bank Stock Dividend income derived from investments in Federal Home Loan Bank and Federal Reserve Bank stock. Interest-bearing cash and deposits with banks Interest Income, Deposits with Financial Institutions Total interest and dividend income Interest and Dividend Income, Operating INTEREST EXPENSE Interest Expense [Abstract] Deposits Interest Expense, Deposits Federal funds purchased and other short-term borrowings Interest Expense, Other Short-term Borrowings FHLB advances Interest Expense, Federal Home Loan Bank and Federal Reserve Bank Advances, Long-term Repurchase agreements Interest Expense, Securities Sold under Agreements to Repurchase Long-term debt and finance lease liabilities Interest Expense, Other Long-term Debt Total interest expense Interest Expense Net interest income before provision for credit losses Interest Income (Expense), Net Net interest income after provision for credit losses Interest Income (Expense), after Provision for Loan Loss NONINTEREST INCOME Noninterest Income [Abstract] Lending fees Lending Fees LC fees and commissions, and Ancillary loan and lease fees Deposit account fees Deposit account fees Fee and commission revenue earned from transactions originating at the branch level, which include : NSF fees, debit cards fees and other fees. Foreign exchange income Foreign exchange income Foreign exchange income Wealth management fees Wealth Management Fees Wealth Management Fees Interest rate contracts and other derivative income Interest rate contracts and other derivative income Fee income earned from assisting customers in hedging interest rates and other derivative income. Net gains on sales of loans Net gains on sales of available-for-sale investment securities Net gain on sale of business Other income Noninterest Income, Other Operating Income NONINTEREST EXPENSE Noninterest Expense [Abstract] Compensation and employee benefits Labor and Related Expense Occupancy and equipment expense Occupancy, Net Deposit insurance premiums and regulatory assessments Federal Deposit Insurance Corporation Premium Expense Legal expense Legal Fees Data processing Information Technology and Data Processing Consulting expense Professional Fees Deposit related expense Deposit Related Expenses Deposit Related Expenses Computer software expense Computer Software Expense The expense contains computer software expense, amortization, and maintenance expense. Other operating expense Other Noninterest Expense Amortization of tax credit and other investments Total noninterest expense Noninterest Expense INCOME BEFORE INCOME TAXES Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest INCOME TAX EXPENSE Income Tax Expense (Benefit) NET INCOME EARNINGS PER SHARE (“EPS”) Earnings Per Share [Abstract] BASIC (in dollars per share) Earnings Per Share, Basic DILUTED (in dollars per share) Earnings Per Share, Diluted WEIGHTED-AVERAGE NUMBER OF SHARES OUTSTANDING Weighted Average Number of Shares Outstanding, Diluted [Abstract] BASIC (in shares) Weighted Average Number of Shares Outstanding, Basic DILUTED (in shares) Weighted Average Number of Shares Outstanding, Diluted Share-based Payment Arrangement [Abstract] Stock Compensation Plans Share-based Payment Arrangement [Text Block] Income before income taxes Income before incomes taxes, % change Income (Loss) from Continuing Operations before Income Taxes, Change Between Current and Prior Period, Percent Income (Loss) from Continuing Operations before Income Taxes, Change Between Current and Prior Period, Percent Income tax expense Income tax expense, % change Income Tax Expense (Benefit), Change Between Current and Prior Period, Percent Income Tax Expense (Benefit), Change Between Current and Prior Period, Percent Effective tax rate (as a percent) Effective Income Tax Rate Reconciliation, Percent Effective tax rate, % change Effective Income Tax Rate Reconciliation, Change Between Current and Prior Period, Percent Effective Income Tax Rate Reconciliation, Change Between Current and Prior Period, Percent Schedule of amortized cost, gross unrealized gains, gross unrealized losses and fair value by major categories of available-for-sale investment securities Marketable Securities [Table Text Block] Schedule of fair value and associated gross unrealized losses of available-for-sale investment securities Schedule of Unrealized Loss on Investments [Table Text Block] Schedule of the proceeds, gross realized gains, and tax expense related to the sales of available-for-sale investment securities Schedule of Realized Gain (Loss) [Table Text Block] Schedule of contractual maturities of available-for-sale investment securities Investments Classified by Contractual Maturity Date [Table Text Block] Schedule of restricted equity securities Schedule Of Restricted Equity Securities [Table Text Block] Schedule of Restricted Equity Securities [Table Text Block] Interest rate contracts Investment securities available-for-sale Debt Securities, Available-for-sale [Abstract] Equity securities with readily determinable fair value Total investments in tax credit and other investments Investments, Fair Value Disclosure Derivative Derivative Instrument Detail [Abstract] Derivative asset netting adjustments Derivative Asset, Obligation to Return Cash and Right to Reclaim Cash, Net Adjustment Derivative Asset, Obligation to Return Cash and Right to Reclaim Cash, Net Adjustment Derivative asset, after netting Derivative Asset Derivative liability netting adjustment Derivative Liability, Obligation to Return Cash and Right to Reclaim Cash, Net Adjustment Derivative Liability, Obligation to Return Cash and Right to Reclaim Cash, Net Adjustment Derivative liability, after netting Derivative Liability Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Crude oil Crude Oil [Member] Derivative Instruments Derivatives, Fair Value [Line Items] Derivative Asset [Abstract] Derivative Asset [Abstract] Less: Master netting agreements Derivative Asset, Fair Value, Gross Liability Less: Cash collateral received/paid Derivative Asset, Collateral, Obligation to Return Cash, Offset Derivative Liability [Abstract] Derivative Liability [Abstract] Less: Master netting agreements Derivative Liability, Fair Value, Gross Asset Less: Cash collateral received/paid Derivative Liability, Collateral, Right to Reclaim Cash, Offset Customer Counterparty Customer Counterparty [Member] Customer Counterparty [Member] Written options Written Option [Member] Written Option [Member] Purchased options Purchased Options [Member] Purchased Options [Member] Sold collars and corridors Sold Collars and Corridors [Member] Sold Collars and Corridors [Member] Collars and corridors Collars and Corridors [Member] Collars and Corridors [Member] Swaps Swap [Member] Before-Tax Other Comprehensive Income (Loss), before Tax [Abstract] Net unrealized gains (losses) arising during the period OCI, before Reclassifications, before Tax, Attributable to Parent Net realized gains reclassified into net income Reclassification from AOCI, Current Period, before Tax, Attributable to Parent Net change, other comprehensive income (loss) Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent Tax Effect Other Comprehensive Income (Loss), Tax [Abstract] Net unrealized gains (losses) arising during the period Other Comprehensive Income (Loss) before Reclassifications, Tax Net realized gains reclassified into net income Reclassification from AOCI, Current Period, Tax Net change, other comprehensive income (loss) Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent Net-of-Tax Other Comprehensive Income (Loss), Net of Tax [Abstract] Net unrealized gains (losses) arising during the period Net realized gains reclassified into net income Operating lease cost Operating Lease, Cost Finance lease cost: Income and Expenses, Lessee [Abstract] Amortization of right-of-use assets Finance Lease, Right-of-Use Asset, Amortization Interest on lease liabilities Finance Lease, Interest Expense Variable lease cost Variable Lease, Cost Sublease income Sublease Income Net lease cost Lease, Cost Statement of Financial Position [Abstract] ASSETS Assets [Abstract] Cash and due from banks Cash and Due from Banks Interest-bearing cash with banks Interest-bearing Deposits in Banks and Other Financial Institutions Cash and cash equivalents Securities purchased under resale agreements (“resale agreements”) Securities: Securities [Abstract] Securities [Abstract] Available-for-sale investment securities, at fair value (includes assets pledged as collateral of $493,693 in 2019 and $435,833 in 2018) Restricted equity securities, at cost Loans held-for-investment (net of allowance for loan losses of $330,625 in 2019 and $311,322 in 2018; includes assets pledged as collateral of $21,056,804 in 2019 and $20,590,035 in 2018) Premises and equipment (net of accumulated depreciation of $125,887 in 2019 and $118,547 in 2018) Property, Plant and Equipment, Net Operating lease right-of-use assets Operating Lease, Right-of-Use Asset Other assets Other Assets TOTAL Assets LIABILITIES Liabilities [Abstract] Noninterest-bearing Noninterest-bearing Deposit Liabilities Interest-bearing Interest-bearing Deposit Liabilities Total deposits Deposits Federal Home Loan Bank (“FHLB”) advances Securities sold under repurchase agreements (“repurchase agreements”) Long-term debt and finance lease liabilities Long-term Debt and Lease Obligation Long-term debt Operating lease liabilities Accrued expenses and other liabilities Accrued Liabilities and Other Liabilities Total liabilities Liabilities COMMITMENTS AND CONTINGENCIES (Note 12) Commitments and Contingencies STOCKHOLDERS’ EQUITY Stockholders' Equity Attributable to Parent [Abstract] Common stock, $0.001 par value, 200,000,000 shares authorized; 166,532,188 and 165,867,587 shares issued in 2019 and 2018, respectively Common Stock, Value, Issued Additional paid-in capital Additional Paid in Capital Retained earnings Retained Earnings (Accumulated Deficit) Treasury stock, at cost — 20,985,619 shares in 2019 and 20,906,224 shares in 2018 Treasury Stock, Value Accumulated other comprehensive loss (“AOCI”), net of tax Accumulated Other Comprehensive Income (Loss), Net of Tax Total stockholders’ equity TOTAL Liabilities and Equity Leases Lessee and Lessor, Operating Leases, Finance Leases and Direct Financing Leases [Text Block] Lessee and Lessor, Operating Leases, Finance Leases and Direct Financing Leases [Text Block] Loans Receivable and Allowance for Credit Losses Loans, Notes, Trade and Other Receivables Disclosure [Text Block] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Award Type [Axis] Award Type [Axis] Award Type [Domain] Award Type [Domain] RSUs Restricted Stock Units (RSUs) [Member] Performance-Based RSUs Performance Based Restricted Stock Settled in Stock [Member] Performance-based restricted stock awards as awarded by a company to their employees as a form of incentive compensation. Time-Based RSUs Time Based Restricted Stock Settled in Stock [Member] Time-based restricted stock awards as awarded by a company to their employees as a form of incentive compensation. Vesting [Axis] Vesting [Axis] Vesting [Domain] Vesting [Domain] Ratably Ratably Vesting [Member] RatablyVesting [Member] Cliff Cliff Vesting [Member] Cliff Vesting [Member] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Stock options outstanding (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding, Number Vesting period Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period Potential for awards to vest (as a percent) Share-based Compensation Arrangement by Share-based Payment Award, Percentage of Target Award Available for Grant Share-based Compensation Arrangement by Share-based Payment Award, Percentage of Target Award Available for Grant Total unrecognized compensation cost Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount Weighted average period to recognize unrecognized compensation cost Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition Forwards and spot Forwards and Spots [Member] Forwards and Spots [Member] Collars Collars [Member] Collars [Member] Changes in accretable yield for PCI loans Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward] Accretable yield for PCI loans, beginning of period Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Accretion Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Accretion Changes in expected cash flows Changes in Expected Cash Flows Represents the change in the estimate of cash flows expected to be collected. This relates to loans not accounted as debt securities, with evidence of deterioration of credit quality since origination that was acquired by completion of a transfer for which it is probable, at acquisition, that the investor will be unable to collect all contractually required payments receivable. Accretable yield for PCI loans, end of period Assets, Resale Agreements Offsetting Securities Purchased under Agreements to Resell [Abstract] Gross Amounts of Recognized Assets Securities Purchased under Agreements to Resell, Gross Gross Amounts Offset on the Consolidated Balance Sheet Securities Purchased under Agreements to Resell, Liability Net Amounts of Assets Presented on the Consolidated Balance Sheet Gross Amounts Not Offset on the Consolidated Balance Sheet Securities Purchased under Agreements to Resell Gross Amounts Not Offset [Abstract] No definition required. Collateral Received Securities Purchased under Agreements to Resell, Collateral, Obligation to Return Securities Net Amount Securities Purchased under Agreements to Resell, Amount Offset Against Collateral Liabilities, Repurchase Agreements Offsetting Securities Sold under Agreements to Repurchase [Abstract] Gross Amounts of Recognized Liabilities Gross Amounts Offset on the Consolidated Balance Sheet Net Amounts of Liabilities Presented on the Consolidated Balance Sheet Gross Amounts Not Offset on the Consolidated Balance Sheet Securities Sold under Agreements to Repurchase Gross Amounts Not Offset [Abstract] No definition required. Collateral Pledged Securities Sold under Agreements to Repurchase, Collateral, Right to Reclaim Securities Net Amount Securities Sold under Agreements to Repurchase, Amount Offset Against Collateral Basic: Earnings Per Share, Basic [Abstract] Net income Net Income (Loss) Available to Common Stockholders, Basic Basic weighted average number of shares outstanding (in shares) Basic EPS (in dollars per share) Diluted: Earnings Per Share, Diluted [Abstract] Net income Net Income (Loss) Available to Common Stockholders, Diluted Diluted potential common shares (in shares) Weighted Average Number Diluted Shares Outstanding Adjustment Diluted weighted average number of shares outstanding (in shares) Diluted EPS (in dollars per share) Financing Receivable, Allowance for Credit Loss [Table] Financing Receivable, Allowance for Credit Loss [Table] Acquired with deteriorated credit quality Financing Receivable Allowance for Credit Losses Financing Receivable, Allowance for Credit Loss [Line Items] Allowance for loan losses Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract] Individually evaluated for impairment Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment Collectively evaluated for impairment Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment Allowance for loan losses Loans and Leases Receivable, Allowance Recorded investment in loans Recorded Investment in Total Loans Receivable Related to Each Balance in Allowance for Loan Losses [Abstract] No definition available. Individually evaluated for impairment Financing Receivable, Individually Evaluated for Impairment Collectively evaluated for impairment Financing Receivable, Collectively Evaluated for Impairment Summary of stock compensation expense and related net tax benefit Share-based Payment Arrangement, Cost by Plan [Table Text Block] Summary of activity for time-based and performance-based restricted stock units Share-based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity [Table Text Block] Goodwill and Other Intangible Assets Goodwill and Intangible Assets Disclosure [Text Block] Lessee, Lease, Description [Table] Lessee, Lease, Description [Table] Operating lease right-of use assets Operating Lease, Right-of-Use Assets [Member] Operating Lease, Right-of-Use Assets [Member] Premises and equipment Premises And Equipment [Member] Premises And Equipment [Member] Operating lease liabilities Operating Lease, Liabilities [Member] Operating Lease, Liabilities [Member] Long-term debt and finance lease liabilities Long-term Debt and Finance Lease Liabilities [Member] Long-term Debt and Finance Lease Liabilities [Member] Lessee, Lease, Description [Line Items] Lessee, Lease, Description [Line Items] Operating lease assets Finance lease assets Finance Lease, Right-of-Use Asset Total lease assets Lease, Right-of-Use Asset Lease, Right-of-Use Asset Finance lease liabilities Total lease liabilities Lease, Liability Lease, Liability Statement of Comprehensive Income [Abstract] Other comprehensive income (loss), net of tax: Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract] Net changes in unrealized gains (losses) on available-for-sale investment securities Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax, Portion Attributable to Parent Foreign currency translation adjustments Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Parent COMPREHENSIVE INCOME Comprehensive Income (Loss), Net of Tax, Attributable to Parent Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Total Segment Reporting Information Segment Reporting Information [Line Items] Net interest income before provision for credit losses Provision for credit losses Noninterest income Noninterest expense Segment income before income taxes Segment net income Segment assets Available for sale debt investment securities Pledged as Collateral, at Fair Value Pledged Assets Separately Reported, Securities Pledged as Collateral, at Fair Value Loans held-for-investment pledged as collateral Loans Pledged as Collateral Premises and equipment, accumulated depreciation Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Common stock, shares authorized (in shares) Common Stock, Shares Authorized Common stock, shares issued (in shares) Common Stock, Shares, Issued Treasury stock, shares (in shares) Treasury Stock, Shares Subsequent Event [Table] Subsequent Event [Table] Subsequent Event Type [Axis] Subsequent Event Type [Axis] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Subsequent Event Subsequent Event [Member] Scenario, Forecast Forecast [Member] Subsequent events Subsequent Event [Line Items] Dividends declared per common share (in dollars per share) Dividends payable per common share (in dollars per share) Dividends Payable, Amount Per Share Net investment hedges Net Investment Hedging [Member] Foreign exchange contracts (Losses) gains recognized in AOCI Other Comprehensive Income (Loss), Net Investment Hedge Gain (Loss) Other comprehensive income (loss) on derivatives instrument designated and qualifying in Net Investment Hedge Period Increase (Decrease). Available-for-sale investment securities Available-for-sale Securities, Debt Maturities [Abstract] Amortized Cost Debt Securities, Available-for-sale, Amortized Cost, Fiscal Year Maturity [Abstract] Due within one year Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, within One Year, Amortized Cost Due after one year through five years Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after One Through Five Years, Amortized Cost Due after five years through ten years Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after Five Through Ten Years, Amortized Cost Due after ten years Debt Securities, Available-for-sale, Allocated and Single Maturity Date, Maturity, after 10 Years, Amortized Cost Fair Value Debt Securities, Available-for-sale, Fair Value, Fiscal Year Maturity [Abstract] Due within one year Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, within One Year, Fair Value Due after one year through five years Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after One Through Five Years, Fair Value Due after five years through ten years Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after Five Through Ten Years, Fair Value Due after ten years Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after 10 Years, Fair Value Total available-for-sale debt investment securities Time-Based RSUs Settled in Shares Performance-Based RSUs Settled in Shares Time-Based RSUs Settled in Cash Time Based Restricted Stock Settled in Cash [Member] [Member] Time Based Restricted Stock Settled in Cash [Member] Shares Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Outstanding, at beginning of period (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Vested (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Forfeited (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Outstanding, at end of period (in shares) Weighted-Average Grant Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Outstanding, at beginning of period (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Granted (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Vested (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Forfeited (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Outstanding, at end of period (in dollars per share) Single-family residential and home equity line of credit Single-family Residential and Home Equity Line of Credit [Member] Single-family Residential and Home Equity Line of Credit [Member] Number of units in multifamily properties used to secure multifamily residential loans Number of Units in the Multifamily Properties Used as Collateral Number of Units in the Multifamily Properties Used as Collateral Loan-to-value ratio (or less at origination) Loan to Value Ratio Ratio which compares the amount of the borrower’s first mortgage with the appraised value of the property. It is computed as Current Loan Balance ÷ Current Appraised Value Loans receivable pledged to secure borrowings and to provide additional borrowing capacity from the FHLB and the Federal Reserve Bank Cover page. Document Type Document Type Document Quarterly Report Document Quarterly Report Document Period End Date Document Period End Date Document Transition Report Document Transition Report Entity File Number Entity File Number Entity Registrant Name Entity Registrant Name Entity Central Index Key Entity Central Index Key Current Fiscal Year End Date Current Fiscal Year End Date Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Amendment Flag Amendment Flag Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Entity Tax Identification Number Entity Tax Identification Number Entity Address, Address Line One Entity Address, Address Line One Entity Address, Address Line Two Entity Address, Address Line Two Entity Address, City or Town Entity Address, City or Town Entity Address, State or Province Entity Address, State or Province Entity Address, Postal Zip Code Entity Address, Postal Zip Code City Area Code City Area Code Local Phone Number Local Phone Number Title of each class Title of 12(b) Security Trading Symbol Trading Symbol Name of each exchange on which registered Security Exchange Name Entity Current Reporting Status Entity Current Reporting Status Entity Interactive Data Current Entity Interactive Data Current Entity Filer Category Entity Filer Category Entity Small Business Entity Small Business Entity Emerging Growth Company Entity Emerging Growth Company Entity Shell Company Entity Shell Company Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Organization, Consolidation and Presentation of Financial Statements [Abstract] Number of wholly-owned subsidiaries that are statutory business trusts (the Trusts) Number of Wholly Owned Statutory Business Trusts Represents the number of wholly owned subsidiaries of the entity that are statutory business trusts, which are not consolidated. Schedule of Goodwill [Table] Schedule of Goodwill [Table] Reporting Unit [Axis] Reporting Unit [Axis] Reporting Unit [Domain] Reporting Unit [Domain]