Mortgage Banking [Abstract] MORTGAGE BANKING OPERATIONS Mortgage Banking Operations [Text Block] Mortgage banking operation. Schedule of Accounts, Notes, Loans and Financing Receivable [Table] Schedule of Accounts, Notes, Loans and Financing Receivable [Table] Class of Financing Receivable, Type [Axis] Class of Financing Receivable, Type [Axis] Class of Financing Receivable, Type [Domain] Class of Financing Receivable, Type [Domain] Single family [Member] Residential Mortgage [Member] Single family residential mortgage servicing rights [Member] Single family residential mortgage servicing rights [Member] Single family mortgage servicing rights Accounts, Notes, Loans and Financing Receivable [Line Items] Accounts, Notes, Loans and Financing Receivable [Line Items] Servicing Asset at Fair Value, Amount [Roll Forward] Servicing Asset at Fair Value, Amount [Roll Forward] Beginning balance Servicing Asset at Fair Value, Amount Additions and amortization: Additions And Amortization [Abstract] Additions And Amortization [Abstract] Originations Servicing Asset at Fair Value, Additions Sale of single family MSRs Servicing Asset at Fair Value, Disposals Changes due to modeled amortization Changes in Fair Value of Mortgage Servicing Rights Due to Modeled Amortization Changes in the fair value of mortgage servicing rights due to modeled amortization. Net additions and amortization Servicing Asset at Fair Value, Additions and Amortization, Net Servicing Asset at Fair Value, Additions and Amortization, Net Changes in fair value of MSR due to changes in market inputs and/or model updates Servicing Asset at Fair Value, Other Changes in Fair Value Ending balance Derivative Instruments and Hedging Activities Disclosure [Abstract] DERIVATIVES AND HEDGING ACTIVITIES Derivative Instruments and Hedging Activities Disclosure [Text Block] 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] Constant prepayment rate [Member] Measurement Input, Prepayment Rate [Member] Discount rate [Member] Measurement Input, Discount Rate [Member] Fair Value Measurement Inputs and Valuation Techniques Fair Value Measurement Inputs and Valuation Techniques [Line Items] Servicing asset, measurement input Servicing Asset, Weighted Average Measurement Input Servicing Asset, Weighted Average Measurement Input Restructuring and Related Activities [Abstract] Restructuring reserve rollforward Schedule of Restructuring Reserve by Type of Cost [Table Text Block] Receivables [Abstract] Measurement Frequency [Axis] Measurement Frequency [Axis] Fair Value, Measurement Frequency [Domain] Fair Value, Measurement Frequency [Domain] Recurring [Member] Fair Value, Measurements, Recurring [Member] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Level 3 [Member] Fair Value, Inputs, Level 3 [Member] Financing Receivable Portfolio Segment [Axis] Financing Receivable Portfolio Segment [Axis] Financing Receivable Portfolio Segment [Domain] Financing Receivable Portfolio Segment [Domain] Consumer loans [Member] Consumer Portfolio Segment [Member] Commercial real estate loans [Member] Commercial Real Estate Portfolio Segment [Member] Commercial and industrial loans [Member] Commercial Portfolio Segment [Member] Home equity and other [Member] Home Equity Line of Credit [Member] Non-owner occupied commercial real estate [Member] Non Owner Occupied Commercial Real Estate [Member] Non Owner Occupied Commercial Real Estate [Member] Multifamily [Member] Multifamily Residential [Member] Residential multifamily property. Construction/land development [Member] Construction Loans [Member] Owner occupied commercial real estate [Member] Owner Occupied Commercial Real Estate [Member] Owner Occupied Commercial Real Estate [Member] Commercial business [Member] Commercial Loan [Member] Loans held for investment Accounts, Notes, Loans and Financing Receivable, Classified [Abstract] Total loans before fees and costs Loans and Leases Receivable, before Fees, Gross Net deferred loan fees and costs Unamortized Loan Commitment and Origination Fees and Unamortized Discounts or Premiums Total loans Loans and Leases Receivable, Gross Allowance for loan losses Loans and Leases Receivable, Allowance Loans held for investment Loans and Leases Receivable, Net Amount Fair value of loans held for investment Loans Receivable, Fair Value Disclosure Stockholders' Equity Note [Abstract] Reclassification out of Accumulated Other Comprehensive Income [Table] Reclassification out of Accumulated Other Comprehensive Income [Table] Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Gains and Losses on Available-for-Sale Securities [Member] Accumulated Net Investment Gain (Loss) Attributable to Parent [Member] Reclassification out of Accumulated Other Comprehensive Income [Axis] Reclassification out of Accumulated Other Comprehensive Income [Axis] Reclassification out of Accumulated Other Comprehensive Income [Domain] Reclassification out of Accumulated Other Comprehensive Income [Domain] Reclassification out of Accumulated Other Comprehensive Income (Loss) [Member] Reclassification out of Accumulated Other Comprehensive Income [Member] Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items] Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items] Gain (loss) on sale of investment securities available for sale Debt Securities, Available-for-sale, Realized Gain (Loss) Income tax (benefit) expense Income Tax Expense (Benefit) Total, net of tax Reclassification from AOCI, Current Period, Net of Tax, Attributable to Parent Derivative [Table] Derivative [Table] Concentration of Credit or Market Risk [Axis] Concentration of Credit or Market Risk [Axis] Fair Value, Concentration of Risk, Disclosure Items [Domain] Fair Value, Concentration of Risk, Disclosure Items [Domain] Concentration of credit risk, master netting arrangements [Member] Fair Value, Concentration of Credit Risk, Master Netting Arrangements [Member] Derivative [Line Items] Derivative [Line Items] Gross fair value, derivative assets Derivative Asset, Fair Value, Gross Asset Netting adjustments, derivative assets Derivative Asset Fair Value Amount Offset Against Other Derivatives The amount as of the balance sheet date of the fair value of derivative assets that in accordance with the entity's accounting policy was offset against other derivative contracts under a master netting arrangement. Derivative assets Derivative Asset Securities pledged, derivative assets Derivative Asset, Fair Value of Collateral Net amount - derivative assets Derivative Asset, Fair Value, Amount Offset Against Collateral Derivatives before netting, derivative Liabilities Derivative Liability, Fair Value, Gross Liability Netting adjustments, derivative liabilities Derivative Liability Fair Value Amount Offset Against Other Derivatives The amount as of the balance sheet date of the fair value of derivative liabilities that in accordance with the entity's accounting policy were offset against other derivative contracts under a master netting arrangement. Derivative liabilities Derivative Liability Securities pledged, derivative liabilities Derivative Liability, Fair Value of Collateral Net amount, derivative liabilities Derivative Liability, Fair Value, Amount Offset Against Collateral Cash collateral, as part of netting adjustment Right to reclaim cash in excess of fair value of derivative liability The right to reclaim cash that is in excess of fair value of derivative liability. Class of Financing Receivable [Domain] Multifamily DUS [Member] Multifamily DUS [Member] Multifamily DUS - commercial mortgage. Small Business Administration Loan [Member] Small Business Administration Loan [Member] Small Business Administration Loan [Member] CRE-Non-DUS [Member] Commercial Real Estate, Excluding DUS [Member] Commercial Real Estate, Excluding DUS [Member] Loans held for sale Loans Receivable Held-for-sale, Net, Not Part of Disposal Group Total loans held for sale Loans Receivable Held-for-sale, Amount Loans held for sale, discontinued operations Disposal Group, Including Discontinued Operation, Loans Held For Sale Disposal Group, Including Discontinued Operation, Loans Held For Sale Fair Value Disclosures [Abstract] Fair Value, by Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping [Table] Level 1 [Member] Fair Value, Inputs, Level 1 [Member] Level 2 [Member] Fair Value, Inputs, Level 2 [Member] 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 value [Member] Reported Value Measurement [Member] Fair value [Member] Estimate of Fair Value Measurement [Member] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Assets: Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] Cash and cash equivalents Cash and Cash Equivalents, Fair Value Disclosure Investment securities held to maturity Debt Securities, Held-to-maturity, Fair Value Loans held for sale, fair value option Loans Held-for-sale, Fair Value Disclosure Single family mortgage servicing rights Federal Home Loan Bank stock Investment in Federal Home Loan Bank Stock, Fair Value Disclosure Liabilities: Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract] Time deposits Deposits, Fair Value Disclosure Federal Home Loan Bank advances Federal Home Loan Bank Borrowings, Fair Value Disclosure Federal funds purchased and securities sold under agreements to repurchase Securities Loaned or Sold under Agreements to Repurchase, Fair Value Disclosure Long-term debt Debt Instrument, Fair Value Disclosure Accounting Policies [Abstract] SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Significant Accounting Policies [Text Block] Loss Contingencies [Table] Loss Contingencies [Table] Loss Contingency Nature [Axis] Loss Contingency Nature [Axis] Loss Contingency, Nature [Domain] Loss Contingency, Nature [Domain] Representations and warranties reserve for loan receivables [Member] Representations and Warranties Reserve for Loan Receivables [Member] A reserve for expected or probable losses from the repurchase of loan receivables related to certain representations and warranties made at the time the loan was sold. Loss Contingencies [Line Items] Loss Contingencies [Line Items] Mortgage Repurchase Losses [Roll Forward] Loss Contingency Accrual [Roll Forward] Balance, beginning of period Loss Contingency Accrual Additions (reductions), net of adjustments Loss Contingency Accrual, Provision Realized losses Loss Contingency Accrual, Payments Balance, end of period Statement of Financial Position [Abstract] Interest-bearing instruments Interest-bearing Deposits in Banks and Other Financial Institutions Investment securities held at fair value (AFS) Investments, Fair Value Disclosure Fair value of loans held for sale Allowance for losses on loans held for investment Fair value of mortgage servicing rights Preferred stock, par value (in dollars per share) Preferred Stock, No Par Value Preferred stock, shares authorized (in shares) Preferred Stock, Shares Authorized Preferred stock, shares issued (in shares) Preferred Stock, Shares Issued Preferred stock, shares outstanding (in shares) Preferred Stock, Shares Outstanding Common stock, par value (in dollars per share) Common Stock, No Par Value Common stock, shares authorized (in shares) Common Stock, Shares Authorized Common stock, shares issued (in shares) Common Stock, Shares, Issued Common stock, shares outstanding (in shares) Common Stock, Shares, Outstanding Investments, Debt and Equity Securities [Abstract] Security pledged under repurchase agreement Pledged Financial Instruments, Not Separately Reported, Securities for Repurchase Agreements Tax exempt interest income on available-for-sale securities Interest Income, Securities, Operating, Tax Exempt Mortgage loans on real estate, by loan Mortgage Loans on Real Estate, by Loan Disclosure [Table Text Block] Tabular disclosure of mortgage loans on Real Estate, held for sale and sold. Net gain on loan origination and sale activity Net Gain on Mortgage Loan Origination and Sale Activity [Table Text Block] Net gain on mortgage loan origination and sale activity. Company's portfolio of loans serviced for others Portfolio of Loans Serviced for Others [Table Text Block] Company's portfolio of loans serviced for others. Mortgage repurchase losses Mortgage Repurchase Losses [Table Text Block] Mortgage Repurchase Losses rollforward Revenue from mortgage servicing, including the effects of derivative risk management instruments Schedule of Revenue from Mortgage Servicing Including Effects of Derivative Risk Management Instruments [Table Text Block] Revenue from mortgage servicing, including the effects of derivative risk management instruments. Key economic assumptions used in measuring initial FV of capitalized single family MSRs Key Economic Assumptions Used in Measuring Initial Value of Capitalized Single Family Created from Loan Sales with Retained Servicing [Table Text Block] Key economic assumptions used in measuring the initial value of capitalized single family MSRs created from loan sales with retained servicing. Schedule of sensitivity analysis of fair value, transferor's interests in transferred financial assets Schedule of Sensitivity Analysis of Fair Value, Transferor's Interests in Transferred Financial Assets [Table Text Block] Changes in single family MSRs measured at fair value Schedule of Servicing Assets at Fair Value [Table Text Block] Changes in multifamily MSRs measured at the lower of amortized cost or fair value Servicing Asset at Amortized Cost [Table Text Block] Projected amortization expense for the gross carrying value of multifamily MSRs Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] Business Combinations [Abstract] Schedule of Business Acquisitions, by Acquisition [Table] Schedule of Business Acquisitions, by Acquisition [Table] Business Acquisition [Axis] Business Acquisition [Axis] Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] Silvergate Bank Branch, San Diego County Silvergate Bank Branch, San Diego County [Member] Silvergate Bank Branch, San Diego County [Member] Business Acquisition [Line Items] Business Acquisition [Line Items] Goodwill from acquisition Goodwill LOANS AND CREDIT QUALITY Financing Receivables [Text Block] Banking and Thrift [Abstract] Certificates of deposit outstanding Time Deposits, Rolling Year Maturity [Abstract] Within one year Time Deposit Maturities, Next Rolling Twelve Months One to two years Time Deposit Maturities, Rolling Year Two Two to three years Time Deposit Maturities, Rolling Year Three Three to four years Time Deposit Maturities, Rolling Year Four Four to five years Time Deposit Maturities, Rolling Year Five Thereafter Time Deposit Maturities, after Rolling Year Five Total Time Deposits Proceeds from sale of loans originated as held for sale Proceeds from Sale of Mortgage Loans Held-for-sale Proceeds from sale of loans originated as held for investment Proceeds from Sale of Loans Held-for-investment Federal Home Loan Bank to secure borrowings Pledged Financial Instruments, Not Separately Reported, Securities for Federal Home Loan Bank Washington and California State to secure public deposits Pledged Assets Not Separately Reported Securities Pledged For State and Local Governments Pledged Assets Not Separately Reported Securities Pledged For State and Local Governments. Securities pledged to secure derivatives in a liability position Pledged Financial Instruments, Securities pledged to secure derivatives in a liability position Pledged Financial Instruments, Securities pledged to secure derivatives in a liability position Other securities pledged Pledged Assets Separately Reported Other Securities Pledged Pledged Assets Separately Reported Other Securities Pledged Total securities pledged as collateral Pledged Financial Instruments, Not Separately Reported, Securities Leases [Abstract] 2019 Operating Leases, Future Minimum Payments, Remainder of Fiscal Year 2020 Operating Leases, Future Minimum Payments, Due in Two Years 2021 Operating Leases, Future Minimum Payments, Due in Three Years 2022 Operating Leases, Future Minimum Payments, Due in Four Years 2023 Operating Leases, Future Minimum Payments, Due in Five Years 2024 and thereafter Operating Leases, Future Minimum Payments, Due Thereafter Total minimum payments Operating Leases, Future Minimum Payments Due Debt Securities, Available-for-sale [Table] Debt Securities, Available-for-sale [Table] Adjustments for New Accounting Pronouncements [Axis] Adjustments for New Accounting Pronouncements [Axis] Type of Adoption [Domain] Type of Adoption [Domain] Accounting Standards Update 2017-12 [Member] Accounting Standards Update 2017-12 [Member] Financial Instrument [Axis] Financial Instrument [Axis] Financial Instruments [Domain] Financial Instruments [Domain] Residential mortgage-backed securities [Member] Residential Mortgage Backed Securities [Member] Commercial mortgage-backed securities [Member] Commercial Mortgage Backed Securities [Member] Residential collateralized mortgage obligations [Member] Collateralized Residential Mortgage Obligations [Member] The category includes multiclass, pay-through securitizations collateralized by residential mortgages secured by assets, such as automobiles and boats, which are generally structured so that the collections of principal and interest due from the underlying debtors are paid to the holders of the CMO. Commercial collateralized mortgage obligations [Member] Collateralized Commercial Mortgage Obligations [Member] The category includes multiclass, pay-through securitizations collateralized by commercial mortgages secured by assets, such as automobiles and boats, which are generally structured so that the collections of principal and interest due from the underlying debtors are paid to the holders of the CMO. Municipal bonds [Member] Municipal Bonds [Member] Corporate debt securities [Member] Corporate Debt Securities [Member] US Treasury securities [Member] US Treasury Securities [Member] Agency debentures [Member] Agency Securities [Member] Collateralized mortgage obligations [Member] Collateralized Mortgage Obligations [Member] Debt Securities, Available-for-sale [Line Items] Debt Securities, Available-for-sale [Line Items] AVAILABLE FOR SALE Debt Securities, Available-for-sale [Abstract] 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 Fair value Debt Securities, Available-for-sale HELD TO MATURITY Debt Securities, Held-to-maturity [Abstract] Amortized cost Debt Securities, Held-to-maturity Gross unrealized gains Debt Securities, Held-to-maturity, Accumulated Unrecognized Gain Gross unrealized losses Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss Fair value Schedule of Financing Receivables Past Due [Table] Schedule of Financing Receivables Past Due [Table] Financing Receivables, Period Past Due [Axis] Financing Receivables, Period Past Due [Axis] Financing Receivables, Period Past Due [Domain] Financing Receivables, Period Past Due [Domain] 30 to 59 days past due [Member] Financing Receivables, 30 to 59 Days Past Due [Member] 60 to 89 days past due [Member] Financing Receivables, 60 to 89 Days Past Due [Member] 90 days or more past due [Member] Financing Receivables, Equal to Greater than 90 Days Past Due [Member] Financing Receivable, Recorded Investment, Past Due [Line Items] Financing Receivable, Recorded Investment, Past Due [Line Items] Total past due Financing Receivable, Recorded Investment, Past Due Current Financing Receivable, Recorded Investment, Current Total loans 90-days or more past due and still accruing Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing FAIR VALUE MEASUREMENT Fair Value Disclosures [Text Block] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Interest rate lock and purchase loan commitments [Member] Interest Rate Lock Commitments [Member] Asset Class [Axis] Asset Class [Axis] Asset Class [Domain] Asset Class [Domain] Available-for-sale Securities [Member] Available-for-sale Securities [Member] Loans held for sale [Member] Loans held for sale [Member] Loans held for sale [Member] Loans held for investment [Member] Loans held for investment [Member] Loans held for investment [Member] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Fair Value Changes and Activity for Level 3 [Roll Forward] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Beginning balance Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs Additions Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases Transfers Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net Settlements Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements Realized/unrealized gains (losses) Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings Ending balance Decrease in investment securities held to maturity Investment securities available for sale Fair value measurement methodologies Fair Value Measurement Methodologies [Table Text Block] Fair value measurement methodologies. Schedule of fair value hierarchy measurement Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Schedule of inputs used to measure fair value Fair Value Measurement Inputs and Valuation Techniques [Table Text Block] Schedule of fair value changes and activity for Level 3 Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] Schedule of assets that had changes in their recorded fair value Fair Value Measurements, Nonrecurring [Table Text Block] Schedule of the fair value hierarchy Fair Value, by Balance Sheet Grouping [Table Text Block] Schedule of Financing Receivable, Allowance for Credit Losses [Table] Schedule of Financing Receivable, Allowance for Credit Losses [Table] Financing Receivable, Modification, Type of Concession [Axis] Financing Receivable, Modification, Type of Concession [Axis] Describes the type of concession given by the entity to debtor. Financing Receivable, Concessions [Domain] Financing Receivable, Concessions [Domain] Concessions given to a borrower under a loan modification. Interest rate reduction [Member] Interest Rate Reduction [Member] Interest rate reduction. Payment restructure [Member] Payment Restructure [Member] Payment restructure. Financing Receivable, Impaired [Line Items] Financing Receivable, Impaired [Line Items] Number of loan modifications - TDR Financing Receivable, Modifications, Number of Contracts Recorded investment - TDR Financing Receivable, Modifications, Recorded Investment at Period End Financing Receivable, Modifications, Recorded Investment at Period End Related charge-offs - TDR Financing Receivables, Impaired, Troubled Debt Restructuring, Write-down Statement of Stockholders' Equity [Abstract] Statement [Table] Statement [Table] Common stock [Member] Common Stock [Member] Additional Paid-in Capital [Member] Additional Paid-in Capital [Member] Retained Earnings [Member] Retained Earnings [Member] Accumulated Other Comprehensive Income (Loss) [Member] AOCI Attributable to Parent [Member] Statement [Line Items] Statement [Line Items] Stockholders' Equity Attributable to Parent [Abstract] Stockholders' Equity Attributable to Parent [Abstract] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Common stock shares outstanding, beginning balance (in shares) Beginning balance Stockholders' Equity Attributable to Parent Net income (loss) Net Income (Loss) Attributable to Parent Common stock issued, (in shares) Stock Issued During Period, Shares, New Issues Common stock issued Stock Issued During Period, Value, New Issues Share-based compensation expense Adjustments to Additional Paid in Capital, Share-based Compensation, Stock Options, Requisite Service Period Recognition Cumulative effect of adoption of new accounting standards Cumulative Effect of New Accounting Principle in Period of Adoption Other comprehensive (loss) income Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Common stock repurchased and retired (in shares) Stock Repurchased and Retired During Period, Shares Common stock repurchased and retired Stock Repurchased and Retired During Period, Value Reclassification to temporary equity Reclassifications Of Permanent To Temporary Equity Reclassifications Of Permanent To Temporary Equity Common stock shares outstanding, ending balance (in shares) Ending balance Increase (Decrease) in Temporary Equity [Roll Forward] Increase (Decrease) in Temporary Equity [Roll Forward] Beginning balance Temporary Equity, Carrying Amount, Including Portion Attributable to Noncontrolling Interests Ending balance Servicing contracts [Member] Servicing Contracts [Member] Servicing fees and other Servicing Fees and Other Servicing fees and other. Changes in fair value of single family MSRs due to modeled amortization Amortization of multifamily and SBA MSRs Amortization of Mortgage Servicing Rights (MSRs) Net servicing income Net Servicing Income Servicing and other related fees, net of payments. Changes in fair value due to changes in model inputs and/or assumptions Net (loss) gain from derivatives economically hedging MSR Derivative, Gain (Loss) on Derivative, Net Mortgage servicing rights, risk management Mortgage servicing rights, risk management Changes in MSR fair value due to changes in model inputs and assumptions, net of risk management derivatives. Loan servicing income Servicing Fees Net, Including Discontinued Operations Servicing Fees Net, Including Discontinued Operations MSR transaction costs, discontinued operations Disposal Group, Including Discontinued Operation, Servicing Fees Net1 Disposal Group, Including Discontinued Operation, Servicing Fees Net1 Derivatives designated as a hedging instrument Derivative, Fair Value, Net Notional amount and fair value for derivatives Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block] Fair value, concentration of risk Fair Value, Concentration of Risk [Table Text Block] Net gains (losses) recognized on economic hedge derivatives Derivative Instruments, Gain (Loss) [Table Text Block] Gain On Mortgage Loan Origination And Sale Activities [Table] Gain On Mortgage Loan Origination And Sale Activities [Table] Schedule detailing gain on mortgage loan origination and sale activities. Gain on mortgage loan origination and sale activities [Line Items] Gain on mortgage loan origination and sale activities [Line Items] Gain on mortgage loan origination and sale activities [Line Items] Servicing value and secondary market gains Gain (Loss) on Sale of Mortgage Loans Loan origination and funding fees Loan Origination and Funding Fees Loan origination and funding fees received. Total gain on loan origination and sale activities Net Gains Losses on Mortgage Loan Origination and Sales Activities Net gain on mortgage loan origination and sale activities. Gain (loss) on loan origination and sales activities, loans held for investment Net Gains Losses On Mortgage Loan Origination And Sales Activities, Loans Held For Investment Net Gains Losses On Mortgage Loan Origination And Sales Activities, Loans Held For Investment Total gain on loan origination and sale activities Net Gains Losses On Mortgage Loan Origination And Sales Activities, Including Discontinued Operations Net Gains Losses On Mortgage Loan Origination And Sales Activities, Including Discontinued Operations Net gains on mortgage loan origination and sales activities, discontinued operations Disposal Group, Including Discontinued Operation, Net Gains Losses On Mortgage Loan Origination And Sales Activities Disposal Group, Including Discontinued Operation, Net Gains Losses On Mortgage Loan Origination And Sales Activities Income Statement [Abstract] Interest income: Interest and Dividend Income, Operating [Abstract] Loans Interest and Fee Income, Loans and Leases Investment securities Interest and Dividend Income, Securities, Operating Other Other Interest and Dividend Income Total interest income Interest and Dividend Income, Operating Interest expense: Interest Expense [Abstract] Deposits Interest Expense, Deposits Federal Home Loan Bank advances Interest Expense, Federal Home Loan Bank and Federal Reserve Bank Advances, Short-term Federal funds purchased and securities sold under agreements to repurchase Interest Expense, Securities Sold under Agreements to Repurchase Long-term debt Interest Expense, Long-term Debt Other Interest Expense, Other Total interest expense Interest Expense Net interest income Interest Income (Expense), Net Provision for credit losses Provision for Loan, Lease, and Other Losses Net interest income after provision for credit losses Interest Income (Expense), after Provision for Loan Loss Noninterest income: Noninterest Income [Abstract] Net gain on loan origination and sale activities Loan servicing income Servicing Fees Net1 Servicing Fees Net1 Depositor and other retail banking fees Depositor and Other Retail Banking Fees Depositor and other retail banking fees. Insurance agency commissions Insurance Commissions and Fees Gain (loss) on sale of investment securities available for sale, net Other Noninterest Income (Expense), Other Noninterest Income (Expense), Other Total noninterest income Noninterest Income Noninterest expense: Noninterest Expense [Abstract] Salaries and related costs Labor and Related Expense General and administrative General and Administrative Expense Amortization of core deposit intangibles Amortization of Intangible Assets Legal Legal Fees Consulting Professional Fees Federal Deposit Insurance Corporation assessments Federal Deposit Insurance Corporation Premium Expense Occupancy Occupancy, Net Information services Communications and Information Technology Net (cost) benefit from operation and sale of other real estate owned Net cost (income) from operations and sale of other real estate owned Amount of net cost (income) from operations and sale of other real estate owned during the period. Total noninterest expense Noninterest Expense Income from continuing operations before income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Income tax expense from continuing operations Income from continuing operations Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest (Loss) income from discontinued operations before income taxes (includes net loss on disposal of $10,796 and $23,020 for the three and six months ended June 30, 2019) Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax Income tax (benefit) expense from discontinued operations Discontinued Operation, Tax Effect of Discontinued Operation (Loss) income from discontinued operations Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest NET (LOSS) INCOME Basic earnings per common share: Earnings Per Share, Basic [Abstract] Basic income from continuing operations per share (in dollars per share) Income (Loss) from Continuing Operations, Per Basic Share Basic (loss) income from discontinued operations per share (in dollars per share) Discontinued Operation, Income (Loss) from Discontinued Operation, Net of Tax, Per Basic Share Basic income per share (in dollars per share) Earnings Per Share, Basic Diluted earnings per common share Earnings Per Share, Diluted [Abstract] Diluted income from continuing operations per share (in dollars per share) Income (Loss) from Continuing Operations, Per Diluted Share Diluted (loss) income from discontinued operations per share (in dollars per share) Discontinued Operation, Income (Loss) from Discontinued Operation, Net of Tax, Per Diluted Share Diluted income per share (in dollars per share) Earnings Per Share, Diluted Basic weighted average number of shares outstanding (in shares) Weighted Average Number of Shares Outstanding, Basic Diluted weighted average number of shares outstanding (in shares) Weighted Average Number of Shares Outstanding, Diluted Cash paid for amounts included in the measurement of lease liabilities: Cash Paid For Amounts Included In The Measurement Of Lease Liabilities [Abstract] Cash Paid For Amounts Included In The Measurement Of Lease Liabilities [Abstract] Operating cash flows from operating leases Operating Lease, Payments Operating cash flows from finance leases Finance Lease, Interest Payment on Liability Financing cash flows from finance leases Finance Lease, Principal Payments Right-of-use assets obtained in exchange for lease obligations: Right-Of-Use Assets Obtained In Exchange For Lease Obligations [Abstract] Right-Of-Use Assets Obtained In Exchange For Lease Obligations [Abstract] Operating leases Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Finance leases Right-of-Use Asset Obtained in Exchange for Finance Lease Liability Discontinued Operations and Disposal Groups [Abstract] Disposal Groups, Including Discontinued Operations [Table] Disposal Groups, Including Discontinued Operations [Table] Disposal Group Name [Axis] Disposal Group Name [Axis] Disposal Group Name [Domain] Disposal Group Name [Domain] Discontinued Operations, Held-for-sale [Member] Discontinued Operations, Held-for-sale [Member] Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] Disposal Group, Including Discontinued Operation, Assets [Abstract] Disposal Group, Including Discontinued Operation, Assets [Abstract] Loans held-for-sale, at fair value Disposal Group, Including Discontinued Operation, Loans Held-For-Sale, Fair Value Disclosure Disposal Group, Including Discontinued Operation, Loans Held-For-Sale, Fair Value Disclosure Mortgage serving rights Disposal Group, Including Discontinued Operation, Service Assets Disposal Group, Including Discontinued Operation, Service Assets Premises and equipment, net Disposal Group, Including Discontinued Operation, Property, Plant and Equipment Other assets Disposal Group, Including Discontinued Operation, Other Assets Assets of discontinued operations Disposal Group, Including Discontinued Operation, Assets Disposal Group, Including Discontinued Operation, Liabilities [Abstract] Disposal Group, Including Discontinued Operation, Liabilities [Abstract] Deposits Disposal Group, Including Discontinued Operation, Deposits Disposal Group, Including Discontinued Operation, Deposits Accrued expenses and other liabilities Disposal Group, Including Discontinued Operation, Accrued Liabilities Liabilities of discontinued operations Disposal Group, Including Discontinued Operation, Liabilities Derivative assets included in other assets Disposal Group, Including Discontinued Operation, Derivative Asset Disposal Group, Including Discontinued Operation, Derivative Asset Statement of Cash Flows [Abstract] CASH FLOWS FROM OPERATING ACTIVITIES: Net Cash Provided by (Used in) Operating Activities [Abstract] Net (loss) income Adjustments to reconcile net income to net cash provided by (used in) operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Depreciation, amortization and accretion Depreciation, Amortization and Accretion, Net Net fair value adjustment and gain on sale of loans held for sale Increase (Decrease) in Loans Held-for-sale Gain on sale of mortgage servicing rights, gross Gain (Loss) on Disposition of Assets Loss on sale of HLC mortgage origination assets, net Gain (Loss) on Disposition of Other Assets Fair value adjustment of loans held for investment Gains Losses on Loans Held for Investment Gains losses on loans held for investment. Origination of mortgage servicing rights Increase (Decrease) in Mortgage Servicing Rights Increase (Decrease) in Mortgage Servicing Rights Change in fair value of mortgage servicing rights Mortgage Servicing Rights (MSR) Impairment (Recovery) Net loss (gain) on sale of investment securities Net (gain) loss on sale of loans originated as held for investment Gain (Loss) on Sale of Loans and Leases Net fair value adjustment, gain on sale and provision for losses on other real estate owned Net fair value adjustment, gain (loss) and provision on Other Real Estate Owned Net fair value adjustment, gain (loss) and provision on Other Real Estate Owned Loss on disposal of fixed assets Gain (Loss) on Disposition of Property Plant Equipment Loss on lease abandonment and exit costs Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal Deferred income taxes Increase (Decrease) in Deferred Income Taxes Share-based compensation expense Share-based Compensation Origination of loans held for sale Payments for Origination of Mortgage Loans Held-for-sale Proceeds from sale of loans originated as held for sale Proceeds from Sale of Loans Held-for-sale Changes in operating assets and liabilities: Increase (Decrease) in Operating Capital [Abstract] Decrease in accounts receivable and other assets Increase (decrease) in accounts receivable and other assets Increase or decrease in accounts receivable and other assets. (Decrease) increase in accounts payable and other liabilities Increase (Decrease) in Accounts Payable and Other Liabilities Increase (decrease) in accounts payable and other liabilities. Net cash (used in) 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 [Abstract] Purchase of investment securities Payments to Acquire Investments Proceeds from sale of investment securities Proceeds from Sale of Debt Securities, Available-for-sale Principal repayments and maturities of investment securities Proceeds from Maturities, Prepayments and Calls of Debt Securities, Available-for-sale Proceeds from sale of other real estate owned Proceeds from Sale of Other Real Estate Proceeds from sale of mortgage servicing rights Proceeds from Sale of Mortgage Servicing Rights (MSR) Net cash provided by disposal of discontinued operations Proceeds from Divestiture of Businesses and Interests in Affiliates Origination of loans held for investment and principal repayments, net Payments for (Proceeds from) Loans and Leases Purchase of property and equipment Payments to Acquire Property, Plant, and Equipment Net cash used for acquisitions Payments to Acquire Businesses, Net of Cash Acquired Net cash provided by (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] Increase in deposits, net Increase (Decrease) in Deposits Proceeds from Federal Home Loan Bank advances Proceeds from FHLBank Borrowings, Financing Activities Repayment of Federal Home Loan Bank advances Payments of FHLBank Borrowings, Financing Activities Proceeds from federal funds purchased and securities sold under agreements to repurchase Proceeds from Federal Funds Purchased and Securities Sold under Agreements to Repurchase Proceeds from Federal Funds Purchased and Securities Sold under Agreements to Repurchase Repayment of federal funds purchased and securities sold under agreements to repurchase Payments for Securities Sold under Agreements to Repurchase The cash outflow from investments sold under the agreement to repurchase such investment. Proceeds from line of credit draws Proceeds from Lines of Credit Repayment of lease principal Proceeds from Federal Home Loan Bank stock repurchase Proceeds from Sale of Federal Home Loan Bank Stock Purchase of Federal Home Loan Bank stock Payments to Acquire Federal Home Loan Bank Stock Stock repurchased Payments for Repurchase of Common Stock Proceeds from stock issuance, net Proceeds from Issuance of Common Stock Net cash provided by financing activities Net Cash Provided by (Used in) Financing Activities NET INCREASE IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect CASH, CASH EQUIVALENTS AND RESTRICTED CASH: Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents [Abstract] Cash, cash equivalents and restricted cash, beginning of year Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Cash, cash equivalents and restricted cash, end of period Less restricted cash included in other assets Restricted Cash and Cash Equivalents CASH AND CASH EQUIVALENTS AT END OF PERIOD Cash and Cash Equivalents, at Carrying Value SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION: Supplemental Cash Flow Information [Abstract] Cash paid during the period for: Cash Paid During Year for [Abstract] Cash paid during the period for. Interest paid Interest Paid, Excluding Capitalized Interest, Operating Activities Federal and state income taxes (refunded) paid, net Income Taxes Paid, Net Non-cash activities: Noncash Investing Activities [Abstract] Noncash investing activities. Loans held for investment foreclosed and transferred to other real estate owned Loans Held for Investment Foreclosed and Transferred to Other Real Estate Owned Loans held for investment foreclosed and transferred to other real estate owned. Loans transferred from held for investment to held for sale Transfer of Portfolio Loans and Leases to Held-for-sale Loans transferred from held for sale to held for investment Transfer of Loans Held-for-sale to Portfolio Loans Ginnie Mae loans (derecognized) recognized with the right to repurchase, net Loans Recognized with Right to Repurchase GNMA loans recognized with the right to repurchase, net. Receivable from sale of mortgage servicing rights Receivable from sale of mortgage servicing rights Receivable from sale of mortgage servicing rights Acquisition: Acquisition [Abstract] Acquisition [Abstract] Assets acquired Business Combinations, Recognized Identifiable Business Combinations, Recognized Identifiable Liabilities assumed Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities Goodwill Goodwill from acquisition Goodwill from acquisition Interest expense on deposits Interest Expense, Deposits [Abstract] NOW accounts Interest Expense, Negotiable Order of Withdrawal (NOW) Deposits Statement savings accounts Interest Expense, Savings Deposits Money market accounts Interest Expense, Money Market Deposits Certificates of deposit Interest Expense, Time Deposits Interest expense on deposits, Total Net interest income Disposal Group, Including Discontinued Operation, Interest Income Noninterest income Disposal Group, Including Discontinued Operation, Noninterest Income Disposal Group, Including Discontinued Operation, Noninterest Income Noninterest expense Disposal Group, Including Discontinued Operation, Noninterest Expense Disposal Group, Including Discontinued Operation, Noninterest Expense (Loss) income before income taxes Income tax (benefit) expense (Loss) income from discontinued operations Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent Statement of Comprehensive Income [Abstract] Tax expense (benefit) on unrealized holding gain (loss) on securities Other Comprehensive Income (Loss), Securities, Available-for-Sale, Unrealized Holding Gain (Loss) Arising During Period, Tax Tax expense (benefit) on reclassification adjustment for net gain on securities included in net income Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax Operating lease cost Operating Lease, Cost Finance lease cost: Finance Lease, Cost [Abstract] Amortization of right-of-use assets Finance Lease, Right-of-Use Asset, Amortization Interest on lease liabilities Finance Lease, Interest Expense Short-term lease Short-term Lease, Cost Variable lease cost Variable Lease, Cost Sublease income Sublease Income Total lease cost Lease, Cost Single family [Member] Single Family Residential [Member] Single family residential. Commercial loans [Member] U.S. government and agency [Member] Single family other [Member] Single Family Residential Mortgage Loans, Excluding U.S. Government Agency Mortgage Backed Securities [Member] Single family residential mortgage loans, excluding loans held in U.S. Government Agency mortgage pools. Other [Member] Commercial Mortgage, Other [Member] Commercial Mortgage, Other [Member] Loans serviced for others Continuing Involvement with Transferred Financial Assets, Principal Amount Outstanding ASSETS Assets [Abstract] Cash and cash equivalents (includes interest-earning instruments of $75,416 and $28,534) Investment securities (includes $799,397 and $851,968 carried at fair value) Marketable Securities Loans held for sale (includes $81,566 and $52,186 carried at fair value) Loans held for investment (net of allowance for loan losses of $43,254 and $41,470; includes $4,475 and $4,057 carried at fair value) Mortgage servicing rights (includes $67,723 and $75,047 carried at fair value) Servicing Asset Other real estate owned Other Real Estate, Foreclosed Assets, and Repossessed Assets Federal Home Loan Bank stock, at cost Federal Home Loan Bank Stock Premises and equipment, net Property, Plant and Equipment, Net Lease right-of-use assets Operating And Finance Lease, Right-Of-Use Asset Operating And Finance Lease, Right-Of-Use Asset Goodwill Other assets Other Assets Assets of discontinued operations Total assets Assets LIABILITIES AND SHAREHOLDERS' EQUITY Liabilities and Equity [Abstract] Liabilities: Liabilities [Abstract] Deposits Deposits Federal Home Loan Bank advances Advances from Federal Home Loan Banks Accounts payable and other liabilities Accounts Payable and Accrued Liabilities Federal funds purchased and securities sold under agreements to repurchase Federal Funds Purchased and Securities Sold under Agreements to Repurchase Long-term debt Long-term Debt Lease liabilities Operating And Finance Lease, Liability Operating And Finance Lease, Liability Liabilities of discontinued operations Total liabilities Liabilities Commitments and contingencies (Note 8) Commitments and Contingencies Shareholders' equity: Temporary shareholders' equity Temporary Equity [Abstract] Shares subject to repurchase Redeemable Noncontrolling Interest, Equity, Carrying Amount Permanent shareholders' equity Permanent Shareholders' Equity [Abstract] Permanent Shareholders' Equity [Abstract] Preferred stock, no par value, authorized 10,000 shares, issued and outstanding, 0 shares and 0 shares Preferred Stock, Value, Issued Common stock, no par value, authorized 160,000,000 shares, issued and outstanding, 26,085,164 shares and 26,995,348 shares Common Stock, Value, Issued Additional paid-in capital Additional Paid in Capital Retained earnings Retained Earnings (Accumulated Deficit) Accumulated other comprehensive income (loss) Accumulated Other Comprehensive Income (Loss), Net of Tax Total permanent shareholders' equity Total liabilities, temporary shareholders' equity and permanent shareholders' equity Liabilities and Equity Disposal Group Classification [Axis] Disposal Group Classification [Axis] Disposal Group Classification [Domain] Disposal Group Classification [Domain] Discontinued Operations, Disposed of by Sale [Member] Discontinued Operations, Disposed of by Sale [Member] Proceeds from asset sales Book value of asset sales Disposal Group, Including Discontinued Operation, Assets Sold During Period Disposal Group, Including Discontinued Operation, Assets Sold During Period (Loss) gain on assets sold Disposal Group, Including Discontinued Operation, Gain On Assets Sold Disposal Group, Including Discontinued Operation, Gain On Assets Sold Transaction costs Disposal Group, Including Discontinued Operation, Transaction Costs Disposal Group, Including Discontinued Operation, Transaction Costs Compensation expense related to the transactions Disposal Group, Including Discontinued Operation, Labor And Related Expense Disposal Group, Including Discontinued Operation, Labor And Related Expense Facility and IT related costs Disposal Group, Including Discontinued Operation, Occupancy, Net Disposal Group, Including Discontinued Operation, Occupancy, Net Total costs Disposal Group, Including Discontinued Operation, Consideration Including Reimbursed Costs Disposal Group, Including Discontinued Operation, Consideration Including Reimbursed Costs Net loss on disposal Discontinued Operation, Gain (Loss) from Disposal of Discontinued Operation, before Income Tax AVAILABLE FOR SALE Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss [Abstract] Less than 12 months, Gross unrealized losses Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss Less than 12 months, Fair value Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months Twelve months or more, Gross unrealized losses Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss Twelve months or more, Fair value Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer Total, Gross unrealized losses Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss Total, Fair value Debt Securities, Available-for-sale, Unrealized Loss Position HELD TO MATURITY Debt Securities, Held-to-maturity, Fair Value to Amortized Cost [Abstract] Less than 12 months, Gross unrealized losses Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss Less than 12 months, Fair value Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value Twelve months or more, Gross unrealized losses Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss Twelve months or more, Fair value Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value Total, Gross unrealized losses Debt Securities, Held-to-maturity, Unrealized Loss Position, Accumulated Loss Total, Fair value Debt Securities, Held-to-maturity, Unrealized Loss Position, Fair Value Net loss on disposal Proceeds Gross gains Debt Securities, Available-for-sale, Realized Gain Gross losses Debt Securities, Available-for-sale, Realized Loss Allowance for Doubtful Accounts Receivable [Roll Forward] Allowance for Doubtful Accounts Receivable [Roll Forward] Beginning balance Financing Receivable, Allowance for Credit Losses Recoveries, net of (charge-offs) Financing Receivable, Allowance for Credit Losses, Write-downs (Recovery) Financing Receivable, Allowance for Credit Losses, Write-downs (Recovery) Ending balance Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value Measurements, Recurring and Nonrecurring [Table] Nonrecurring [Member] Fair Value, Measurements, Nonrecurring [Member] Level 2 [Member] Level 3 [Member] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Loans held for investment Gains (losses) on loans held for investment Total assets Assets, Fair Value Disclosure Total gains (Losses) Gain (Loss) on Disposition of Assets for Financial Service Operations Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Discontinued Operations, Discontinued Operations, Policy [Policy Text Block] Recent Accounting Developments New Accounting Pronouncements, Policy [Policy Text Block] Loans and Leases Receivable Finance, Loans and Leases Receivable, Policy [Policy Text Block] Allowance for Loan and Lease Losses Financing Receivable, Allowance for Credit Losses, Policy for Uncollectible Amounts [Policy Text Block] Derivatives and Hedging Activities Derivatives, Policy [Policy Text Block] Mortgage Banking Operations Loans and Leases Receivable, Mortgage Banking Activities, Policy [Policy Text Block] Fair Value Measurement Fair Value Measurement, Policy [Policy Text Block] Revenue Revenue from Contract with Customer [Policy Text Block] Schedule of Financing Receivable, Recorded Investment, Credit Quality Indicator [Table] Schedule of Financing Receivable, Recorded Investment, Credit Quality Indicator [Table] Credit Quality Indicator [Axis] Internal Credit Assessment [Axis] Financing Receivable, by Credit Quality Indicator [Domain] Internal Credit Assessment [Domain] Pass [Member] Pass [Member] Watch [Member] Watch [Member] A category of financing receivables that has a remote risk of default but is exhibiting deficiency or weakness that requires monitoring. Special mention [Member] Special Mention [Member] Substandard [Member] Substandard [Member] Doubtful [Member] Doubtful [Member] Loss [Member] Unlikely to be Collected Financing Receivable [Member] Financing Receivable, Recorded Investment [Line Items] Financing Receivable, Recorded Investment [Line Items] Designated Loan Grades by Loan Portfolio Segment and Loan Class [Abstract] Designated Loan Grades by Loan Portfolio Segment and Loan Class [Abstract] Designated loan grades by loan portfolio segment and loan class. Total loans Key economic assumptions and the sensitivity of the current fair value for single family MSRs Expected weighted-average life Servicing Assets and Servicing Liabilities at Fair Value, Assumptions Used to Estimate Fair Value, Weighted Average Life Constant prepayment rate (as a percent) Fair Value Input Prepayment Rate Rate at which loans or a loan portfolio are expected to prepay principal balances, used as an input to measure fair value. Impact on fair value of 25 basis points adverse change in interest rates Impact on Fair Value of Twenty Five Basis Points Decrease Impact on fair value of 25 basis points decrease. Impact on fair value of 50 basis points adverse change in interest rates Impact on Fair Value of Fifty Basis Points Decrease Impact on fair value of 50 basis points decrease. Discount rate (as a percent) Fair Value Input Discount Rate Interest rate used to find the present value of an amount to be paid or received in the future as an input to measure fair value. For example, but not limited to, weighted average cost of capital (WACC), cost of capital, cost of equity and cost of debt. Impact on fair value of 100 basis points increase Impact on Fair Value of Hundred Basis Points Increase Impact on fair value of 100 basis points increase. Impact on fair value of 200 basis points increase Impact on Fair Value of Two Hundred Basis Points Increase Impact on fair value of 200 basis points increase. Measurement Input, Implied Spread [Member] Measurement Input, Implied Spread [Member] Measurement Input, Implied Spread [Member] Market price movement [Member] Measurement Input, Price Volatility [Member] Range [Axis] Range [Axis] Range [Domain] Range [Domain] Minimum [Member] Minimum [Member] Maximum [Member] Maximum [Member] Weighted average [Member] Weighted Average [Member] Loans held for investment, fair value option Loans held for investment, fair vale inputs Loans Held-for-Investment, Measurement Input Loans Held-for-Investment, Measurement Input Loans held for sale, fair value inputs Loans Held-for-sale, Measurement Input Reported Value Measurement [Member] Estimate of Fair Value Measurement [Member] Allowance: collectively evaluated for impairment Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment Allowance: individually evaluated for impairment Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment Allowance for credit losses Loans: collectively evaluated for impairment Financing Receivable, Collectively Evaluated for Impairment Loans: individually evaluated for impairment Financing Receivable, Individually Evaluated for Impairment Total Financing Receivable, Gross Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income (Loss) [Table] 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] Cumulative effect of adoption of new accounting standards Other comprehensive income (loss) before reclassifications OCI, before Reclassifications, Net of Tax, Attributable to Parent Amounts reclassified from accumulated other comprehensive income (loss) Other comprehensive income (loss) BUSINESS COMBINATIONS Business Combination Disclosure [Text Block] Revenue from Contract with Customer [Abstract] Percentage of revenue streams in scope with ASU 2014-09 Revenue Recognition, Percentage Of Revenue In Scope With Accounting Standard Update 2014-09 Revenue Recognition, Percentage Of Revenue In Scope With Accounting Standard Update 2014-09 Loans held for investment Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] Activity in allowance for credit losses Allowance for Credit Losses on Financing Receivables [Table Text Block] Allowance for credit losses by loan portfolio segment and loan class Allowance for Credit Losses by Loan Portfolio Segment and Loan Class [Table Text Block] Allowance for credit losses by loan portfolio segment and loan class. Recorded investment in loans by Impairment Methodology Loans by Impairment Methodology [Table Text Block] Gives the balance of loans collectively evalulated for impairment and loans individually evaluated for impairment. Impaired loans by loan portfolio segment and loan class Impaired Financing Receivables [Table Text Block] Average recorded investment in impaired loans Average Recorded Investment of Impaired Loans [Table Text Block] The average recorded investment of impaired loans held for investment, by loan class. Designated loan grades by loan portfolio segment and loan class Financing Receivable Credit Quality Indicators [Table Text Block] Past due loans by portfolio segment and loan class Past Due Financing Receivables [Table Text Block] Performing and non-performing loan balances by portfolio segment and loan class Performing and Nonaccrual Loan Balances by Loan Portfolio Segment and Loan Class [Table Text Block] Performing and nonaccrual loan balances by loan portfolio segment and loan class. TDR activity by loan portfolio segment and loan class Troubled Debt Restructurings on Financing Receivables [Table Text Block] TDR balances that subsequently re-defaulted Redefaulted Troubled Debt Restructurings on Financing Receivables [Table Text Block] Redefaulted troubled debt restructurings on financing receivables. Fair Value Hierarchy and NAV [Domain] Level 1 [Member] Collateralized mortgage obligations residential [Member] Collateralized Mortgage Obligations Residential [Member] Collateralized mortgage obligations residential. Collateralized mortgage obligations commercial [Member] Collateralized Mortgage Obligations Commercial [Member] Collateralized mortgage obligations commercial. US treasury securities [Member] Us Treasury Collateralized Mortgage Obligations [Member] US treasury collateralized mortgage obligations. Eurodollar futures [Member] Eurodollar Future [Member] Forward sale commitments [Member] Forward Contracts [Member] Interest rate swaptions [Member] Interest Rate Swaption [Member] Interest rate swaps [Member] Interest Rate Swap [Member] Assets: Assets, Fair Value Disclosure [Abstract] Derivative assets Liabilities: Liabilities, Fair Value Disclosure [Abstract] Derivative liabilities Total liabilities Financial and Nonfinancial Liabilities, Fair Value Disclosure Earnings Per Share [Abstract] Schedule of earnings per share, basic and diluted Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Fair value inputs Debt Securities, Available-for-sale, Measurement Input HLC Based Mortgage Banking Operations HLC Based Mortgage Banking Operations [Member] HLC Based Mortgage Banking Operations [Member] Mortgage servicing rights, unpaid principle balance, sold, number of sales Mortgage Servicing Rights, Unpaid Principle Balance, Sold, Number Of Sales Mortgage Servicing Rights, Unpaid Principle Balance, Sold, Number Of Sales Mortgage servicing rights, unpaid principal balance, sold Mortgage Servicing Rights, Unpaid Principal Balance, Sold Mortgage Servicing Rights, Unpaid Principal Balance, Sold Percentage of loan portfolio sold Percentage Of Loans Serviced For Others, As A Percentage Of Total Loans Serviced For Others Percentage Of Loans Serviced For Others, As A Percentage Of Total Loans Serviced For Others Increase in income during period from discontinued operations before income taxes Home loan centers sold Home Loan Centers Sold Home Loan Centers Sold Projected Amortization Expense [Abstract] 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 2024 Finite-Lived Intangible Assets, Amortization Expense, Year Six Finite-Lived Intangible Assets, Amortization Expense, Year Six 2025 and thereafter Finite-Lived Intangible Assets, Amortization Expense, After Year Six Finite-Lived Intangible Assets, Amortization Expense, After Year Six Carrying value of multifamily MSR Servicing Asset at Amortized Cost Transfers between levels of fair value hierarchy Fair Value Measurement Transfers Between With Levels of Hierarchy for Assets and Liabilities Held Fair value measurement transfers between with levels of hierarchy for assets and liabilities held. INVESTMENT SECURITIES Marketable Securities [Table Text Block] LEASES Lessee, Finance Leases [Text Block] LEASES Lessee, Operating Leases [Text Block] 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 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 12(b) Security Title of 12(b) Security Trading Symbol Trading Symbol Security Exchange Name 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 Smaller Reporting Company Entity Small Business Emerging Growth Company Entity Emerging Growth Company Entity Shell Company Entity Shell Company Entity Common Stock, Shares Outstanding (in shares) Entity Common Stock, Shares Outstanding 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 Schedule of Impaired Financing Receivable [Table] Schedule of Impaired Financing Receivable [Table] Financing Receivable, Impaired [Line Items] Impaired loans by loan portfolio segment and loan class [Abstract] Impaired Loans by Loan Portfolio Segment and Loan Class [Abstract] Impaired loans by loan portfolio segment and loan class. Recorded investment with no related allowance recorded Impaired Financing Receivable, with No Related Allowance, Recorded Investment Recorded investment with related allowance recorded Impaired Financing Receivable, with Related Allowance, Recorded Investment Total recorded investment Impaired Financing Receivable, Recorded Investment Unpaid principal balance with no related allowance recorded Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance Unpaid principal balance with related allowance recorded Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance Total unpaid principal balance Impaired Financing Receivable, Unpaid Principal Balance Related allowance Impaired Financing Receivable, Related Allowance Performing TDRs Financing Receivable, Modifications, Performing, Recorded Investment The amount of the outstanding recorded investment related to financing receivables that have been modified by troubled debt restructurings and are currently performing in accordance with the contractual terms of the modification. Net cash (used in) provided by operating activities Cash Provided by (Used in) Operating Activities, Discontinued Operations Net cash provided by investing activities Cash Provided by (Used in) Investing Activities, Discontinued Operations Deposit balances, including stated rates Deposit Balances Including Stated Rates [Table Text Block] Deposit balances, including stated rates. Interest expense on deposits Interest Expense on Deposits [Table Text Block] Interest expense on deposits. Certificates of deposit outstanding Schedule of Maturities of Certificate of Deposits [Table Text Block] Schedule of maturities of certificate of deposits. Operating lease right-of-use assets Operating Lease, Right-of-Use Asset Operating lease liabilities Operating Lease, Liability Finance lease right-of-use assets Finance Lease, Right-of-Use Asset Finance lease liabilities Finance Lease, Liability Weighted Average Remaining lease term Weighted Average Remaining Lease Term [Abstract] Weighted Average Remaining Lease Term [Abstract] Operating leases Operating Lease, Weighted Average Remaining Lease Term Finance leases Finance Lease, Weighted Average Remaining Lease Term Weighted Average Discount Rate Weighted Average Lease Discount Rate [Abstract] Weighted Average Lease Discount Rate [Abstract] Operating leases Operating Lease, Weighted Average Discount Rate, Percent Finance leases Finance Lease, Weighted Average Discount Rate, Percent Financial Instrument [Axis] Federal Home Loan Bank Advances [Member] Federal Home Loan Bank Advances [Member] Federal Reserve Bank Advances [Member] Federal Reserve Bank Advances [Member] Geographical [Axis] Geographical [Axis] Geographical [Domain] Geographical [Domain] Washington WASHINGTON California CALIFORNIA Residential Mortgage And Multifamily [Member] Residential Mortgage And Multifamily [Member] Residential Mortgage And Multifamily [Member] Number of portfolio segments Number of Operating Segments Loans pledged as collateral Loans Pledged as Collateral Percentage of loan portfolio Percentage of Loan Portfolio Percentage of total loan portfolio. Allowance for unfunded commitments Allowance For Unfunded Commitments Allowance For Unfunded Commitments DISCONTINUED OPERATIONS Disposal Groups, Including Discontinued Operations, Disclosure [Text Block] DEPOSITS Deposit Liabilities Disclosures [Text Block] Average recorded investment Impaired Financing Receivable, Average Recorded Investment Interest Income Recognized Impaired Financing Receivable, Interest Income, Accrual Method Subsequent Events [Abstract] SUBSEQUENT EVENT Subsequent Events [Text Block] Schedule of accumulated other comprehensive income (loss) Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Reclassification out of accumulated other comprehensive income (loss) Reclassification out of Accumulated Other Comprehensive Income [Table Text Block] Commitments and Contingencies Disclosure [Abstract] Guarantor Obligations, Nature [Axis] Guarantor Obligations, Nature [Axis] Guarantor Obligations, Nature [Domain] Guarantor Obligations, Nature [Domain] Undisbursed construction loan funds [Member] Undisbursed construction loan funds [Member] Undisbursed construction loan funds Home equity and business banking credit lines [Member] Home Equity and Business Banking Credit Lines [Member] Home Equity and Business Banking Credit Lines Loss sharing relationship [Member] Loss Sharing Relationship [Member] A loss sharing relationship that is accounted for as a guarantee under U.S. GAAP. Credit risk [Member] Credit Risk [Member] Unfunded loan commitments Credit of Unfunded Commitments Credit of unfunded commitments. Unfunded commitment balance of loans sold on a servicing-retained basis Guarantor Obligations, Maximum Exposure, Undiscounted UPB of loans sold through DUS Loans sold through DUS Unpaid principal of Loans sold through DUS program. Reserve liability related to multifamily DUS program Reserve liability related to multifamily DUS Program Reserve liability related to multifamily DUS Program Losses incurred - related to DUS Loss Contingency, Loss in Period Reserve liability related to mortgage repurchase Number of material claims pending Loss Contingency, Pending Claims, Number Loss contingency provision Other comprehensive income (loss), net of tax: Other Comprehensive Income (Loss), Net of Tax [Abstract] Unrealized gain (loss) on investment securities available for sale: Other Comprehensive Income (Loss), Securities, Available-for-sale, Adjustment, after Tax [Abstract] Unrealized holding gain (loss) arising during the period, net of tax expense (benefit) of $2,703 and $(642) for the three months ended June 30, 2019 and 2018, and $5,205 and $(3,300) for the six months ended June 30, 2019 and 2018, respectively Other Comprehensive Income (Loss), Securities, Available-for-Sale, Unrealized Holding Gain (Loss) Arising During Period, after Tax Reclassification adjustment for net (gains) losses included in net income, net of tax expense (benefit) of $29 and $4 for the three months ended June 30, 2019 and 2018, and $(23) and $50 for the six months ended June 30, 2019 and 2018, respectively Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax Comprehensive income Comprehensive Income (Loss), Net of Tax, Attributable to Parent Schedule of Financing Receivable, Troubled Debt Restructurings [Table] Schedule of Financing Receivable, Troubled Debt Restructurings [Table] Financing Receivable, Modifications [Line Items] Financing Receivable, Modifications [Line Items] Number of days past due for consumer loans TDR to be re-default Trouble Debt Restructuring, Re-Default, Number Of Days Past Due, Consumer Trouble Debt Restructuring, Re-Default, Number of Days Past Due, Consumer Number of days past due for commercial loans TDR to be re-default Trouble Debt Restructuring, Re-Default, Number Of Days Past Due, Commercial Trouble Debt Restructuring, Re-Default, Number Of Days Past Due, Commercial TDR balances which have subsequently re-defaulted Redefaulted Troubled Debt Restructurings on Financing Receivable [Abstract] Re-defaulted troubled debt restructurings on financing receivable. Number of TDR loan relationships that re-defaulted Financing Receivable, Modifications, Subsequent Default, Number of Contracts Recorded investment Financing Receivable, Modifications, Subsequent Default, Recorded Investment ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) Comprehensive Income (Loss) Note [Text Block] Amortized cost and fair value of available for sale securities Debt Securities, Available-for-sale [Table Text Block] Amortized cost and fair value of held-to-maturity securities Debt Securities, Held-to-maturity [Table Text Block] Investment securities in an unrealized loss position Schedule of Unrealized Loss on Investments [Table Text Block] Computation of weighted average yield using coupon on the fair value Computation of Weighted Average Yield Using Coupon on Fair Value [Table Text Block] Sales of investment securities available for sale Schedule of Realized Gain (Loss) [Table Text Block] Carrying value of securities pledged as collateral Schedule of Financial Instruments Owned and Pledged as Collateral [Table Text Block] Due within one year, Fair value Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, within One Year, Fair Value Weighted Average Yield, due within one year Available for Sale Securities Debt Maturities within One Year Weighted Average Yield Available for sale securities debt maturities with in one year weighted average yield. Due in one through five years, Fair value Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after One Through Five Years, Fair Value Weighted Average Yield, due after one year through five years Available for Sale Securities Debt Maturities After One Through Five Years Weighted Average Yield Available-for-sale securities debt maturities year two through five fair value