Debt Disclosure [Abstract] Advance line maintained to purchase federal funds Advance Line Maintained to Purchase Federal Funds Advance Line Maintained to Purchase Federal Funds Federal funds purchased Federal Funds Purchased Receivables [Abstract] Schedule of Accounts, Notes, Loans and Financing Receivable [Table] Schedule of Accounts, Notes, Loans and Financing Receivable [Table] Financing Receivable Portfolio Segment [Axis] Financing Receivable Portfolio Segment [Axis] Financing Receivable Portfolio Segment [Domain] Financing Receivable Portfolio Segment [Domain] Commercial business Commercial Portfolio Segment [Member] One-to-four family residential Residential Portfolio Segment [Member] Real estate construction and land development Real Estate Construction and Land Development [Member] Total real estate construction and land development. Consumer Consumer Portfolio Segment [Member] Class of Financing Receivable, Type [Axis] Class of Financing Receivable, Type [Axis] Class of Financing Receivable, Type [Domain] Class of Financing Receivable, Type [Domain] Commercial and industrial Commercial and Industrial [Member] Commercial and industrial. Owner-occupied commercial real estate Owner Occupied Commercial Real Estate [Member] Owner occupied commercial real estate. Non-owner occupied commercial real estate Non Owner Occupied Commercial Real Estate [Member] Non owner occupied commercial real estate. One-to-four family residential One to Four Family Real Estate Construction [Member] One to Four Family Real Estate Construction [Member] Accounts, Notes, Loans and Financing Receivable [Line Items] Accounts, Notes, Loans and Financing Receivable [Line Items] Gross nonaccrual loans Financing Receivable, Recorded Investment, Nonaccrual Status Fair Value Disclosures [Abstract] Fair Value Measurements Fair Value Measurement and Measurement Inputs, Recurring and Nonrecurring [Text Block] Statement of Financial Position [Abstract] ASSETS Assets [Abstract] Cash on hand and in banks Cash and Due from Banks Interest earning deposits Interest-bearing Deposits in Banks and Other Financial Institutions Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Investment securities available for sale, at fair value Available-for-sale Securities Loans held for sale Loans Receivable Held-for-sale, Net, Not Part of Disposal Group Loans receivable, net Loans and Leases Receivable, Net of Deferred Income Allowance for loan losses Loans and Leases Receivable, Allowance Total loans receivable, net Loans and Leases Receivable, Net Amount Other real estate owned Other Real Estate Premises and equipment, net Property, Plant and Equipment, Net Federal Home Loan Bank stock, at cost Federal Home Loan Bank Stock Bank owned life insurance Bank Owned Life Insurance Accrued interest receivable Interest Receivable Prepaid expenses and other assets Prepaid Expense and Other Assets Other intangible assets, net Intangible Assets, Net (Excluding Goodwill) Goodwill Goodwill Total assets Assets LIABILITIES AND STOCKHOLDERS' EQUITY Liabilities and Equity [Abstract] Deposits Deposits Junior subordinated debentures Junior Subordinated Notes Securities sold under agreement to repurchase Securities Sold under Agreements to Repurchase Accrued expenses and other liabilities Other Liabilities Total liabilities Liabilities Stockholders’ equity: Stockholders' Equity Attributable to Parent [Abstract] Preferred stock, no par value, 2,500,000 shares authorized; no shares issued and outstanding at December 31, 2019 and 2018 Preferred Stock, Value, Issued Common stock, no par value, 50,000,000 shares authorized; 36,618,729 and 36,874,055 shares issued and outstanding at December 31, 2019 and 2018, respectively Common Stock, Value, Issued Retained earnings Retained Earnings (Accumulated Deficit) Accumulated other comprehensive income (loss), net Accumulated Other Comprehensive Income (Loss), Net of Tax Total stockholders’ equity Stockholders' Equity Attributable to Parent Total liabilities and stockholders’ equity Liabilities and Equity Disclosure of Compensation Related Costs, Share-based Payments [Abstract] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Vesting [Axis] Vesting [Axis] Vesting [Domain] Vesting [Domain] Share-based Compensation Award, Tranche One [Member] Share-based Compensation Award, Tranche One [Member] Share-based Compensation Award, Tranche Two [Member] Share-based Compensation Award, Tranche Two [Member] Award Type [Axis] Award Type [Axis] Equity Award [Domain] Equity Award [Domain] Employee Stock Option [Member] Employee Stock Option [Member] Restricted Stock Awards Restricted Stock [Member] Plan Name [Axis] Plan Name [Axis] Plan Name [Domain] Plan Name [Domain] the Plan Two Thousand Fourteen Omnibus Equity Plan [Member] Two Thousand Fourteen Omnibus Equity Plan [Member] Option One [Member] Option One [Member] Option One. Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Number of shares authorized for issuance Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized Shares remain available for future issuances under stock-based compensation plans Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant Vesting period Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Table] Fair Value Measurements, Recurring and Nonrecurring [Table] Product and Service [Axis] Product and Service [Axis] Product and Service [Domain] Product and Service [Domain] Commercial Business Commercial Business [Member] Total commercial business. Segments [Axis] Segments [Axis] Segments [Domain] Segments [Domain] Measurement Basis [Axis] Measurement Basis [Axis] Fair Value Measurement [Domain] Fair Value Measurement [Domain] Portion at Fair Value Measurement Portion at Fair Value Measurement [Member] Reported Value Measurement Reported Value Measurement [Member] Measurement Frequency [Axis] Measurement Frequency [Axis] Fair Value, Measurement Frequency [Domain] Fair Value, Measurement Frequency [Domain] Nonrecurring Fair Value, Measurements, Nonrecurring [Member] Financial Instrument Performance Status [Axis] Financial Instrument Performance Status [Axis] Financial Instrument Performance Status [Domain] Financial Instrument Performance Status [Domain] Impaired Loans Impaired Loans [Member] Impaired Loans [Member] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Fair Value, Measurements, Fair Value Hierarchy [Domain] Fair Value Hierarchy and NAV [Domain] Level 1 Fair Value, Inputs, Level 1 [Member] Level 2 Fair Value, Inputs, Level 2 [Member] Level 3 Fair Value, Inputs, Level 3 [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] Interest Rate Derivative Liabilities, at Fair Value Interest Rate Derivative Liabilities, at Fair Value Servicing Asset at Fair Value, Amount Servicing Asset at Fair Value, Amount Basis Basis for Assets Measured at Fair Value Basis for assets measured at fair value. Fair Value Loans Receivable, Fair Value Disclosure Net Losses (Gains) Recorded in Earnings Fair Value Assets Measured on Nonrecurring Basis Net Gains Losses Included in Earnings Amount of net gains and losses recorded in earnings for nonrecurring assets reported at fair value Goodwill and Intangible Assets Disclosure [Abstract] Goodwill impairment charges Goodwill, Impairment Loss Schedule of Finite-Lived Intangible Assets [Table] Schedule of Finite-Lived Intangible Assets [Table] Business Acquisition [Axis] Business Acquisition [Axis] Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] Puget Sound Bank Puget Sound Bank [Member] Puget Sound Bank [Member] Premier Commercial Premier Commercial Bancorp [Member] Premier Commercial Bancorp [Member] Washington Banking Washington Banking [Member] Washington Banking [Member] Valley Community Bancshares Valley Community Bancshares [Member] Valley Community Bancshares [Member] Northwest Commercial Bank [Member] Northwest Commercial Bank [Member] Northwest commercial bank. 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 Deposits Core Deposits [Member] Finite-Lived Intangible Assets [Line Items] Finite-Lived Intangible Assets [Line Items] Useful life Finite-Lived Intangible Asset, Useful Life Leases [Abstract] Lease, cost Lease, Cost [Table Text Block] Lease payment obligations Lessee, Operating Lease, Liability, Maturity [Table Text Block] Schedule of estimated future minimum annual rental commitments under noncancelable leases Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block] Schedule of FHLB advances Federal Home Loan Bank, Advances [Table Text Block] Equity [Abstract] Schedule of Business Acquisitions, by Acquisition [Table] Schedule of Business Acquisitions, by Acquisition [Table] Premier Merger Puget Sound Merger Business Acquisition [Line Items] Business Acquisition [Line Items] Number of shares issued Business Acquisition, Equity Interest Issued or Issuable, Number of Shares Share price (in usd per share) Business Acquisition, Share Price Fair value of shares issued Business Acquisition, Equity Interest Issued or Issuable, Value Assigned 2020 Operating Leases, Future Minimum Payments Due, Next Twelve Months 2021 Operating Leases, Future Minimum Payments, Due in Two Years 2022 Operating Leases, Future Minimum Payments, Due in Three Years 2023 Operating Leases, Future Minimum Payments, Due in Four Years 2024 Operating Leases, Future Minimum Payments, Due in Five Years Thereafter Operating Leases, Future Minimum Payments, Due Thereafter Future minimum annual rental commitments Operating Leases, Future Minimum Payments Due Class of Treasury Stock [Table] Class of Treasury Stock [Table] Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Shares Related to Withholding Taxes on the Vesting of Restricted Stock Shares Related to Withholding Taxes on the Vesting of Restricted Stock [Member] Shares Related to Withholding Taxes on the Vesting of Restricted Stock [Member] Equity, Class of Treasury Stock [Line Items] Equity, Class of Treasury Stock [Line Items] Repurchased shares to pay withholding taxes (in shares) Stock Repurchased During Period, Shares Stock repurchase to pay withholding taxes average share price (in usd per share) Treasury Stock Acquired, Average Cost Per Share Number of shares repurchased related to withholding taxes due on accelerated vesting of RSUs (in shares) Business Combination, Shares Issued in Merger but Forfeited to Pay Taxes Business Combination, Shares Issued in Merger but Forfeited to Pay Taxes Average share price (in usd per share) Schedule of changes in allowance for loan losses Allowance for Loan and Lease Losses [Roll Forward] Balance at the beginning of the year Charge-offs Allowance for Loan and Lease Losses, Write-offs Recoveries of loans previously charged-off Allowance for Loan and Lease Loss, Recovery of Bad Debts Provision for loan losses Provision for Loan and Lease Losses Balance at the end of the year Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Other Borrowings Other Borrowings [Text Block] Other Borrowings [Text Block] Concentration of loans greater than 10% Concentration Risk Percentage Greater than Ten Percent Concentration risk percentage greater than ten percent. Percentage of concentrations of loans in any industry (in excess of 10%) (percent) Concentration Risk, Percentage Changes in accumulated other comprehensive income (loss) Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Commercial Servicing Assets [Abstract] Commercial Servicing Assets [Abstract] Income Tax Disclosure [Abstract] Deferred tax assets: Deferred Tax Assets, Gross [Abstract] Allowance for loan losses Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Provision for Loan Losses Accrued compensation Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Accrued Liabilities Stock compensation Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Share-based Compensation Cost Net unrealized losses charged to other comprehensive income on securities Deferred Tax Assets, Unrealized Losses on Available-for-Sale Securities, Gross Market discount on purchased loans Deferred Tax Assets Market Discount on Loans Deferred Tax Assets Market Discount on Loans Foregone interest on nonaccrual loans Deferred Tax Assets, Foregone Interest on Nonaccrual Loans Deferred Tax Assets, Foregone Interest on Nonaccrual Loans Net operating loss carryforward acquired Deferred Tax Assets, Operating Loss Carryforwards Other Real Estate Owned Deferred Tax Assets, Other Real Estate Owned Deferred Tax Assets, Other Real Estate Owned ROU lease liability Deferred Tax Assets, Right of Use Liability Deferred Tax Assets, Right of Use Liability Other deferred tax assets Deferred Tax Assets, Other Total deferred tax assets Deferred Tax Assets, Gross Deferred tax liabilities: Deferred Tax Liabilities, Gross [Abstract] Deferred loan fees, net Deferred Tax Liabilities Deferred Loan Fees Deferred Tax Liabilities Deferred Loan Fees Premises and equipment Deferred Tax Liabilities, Property, Plant and Equipment FHLB stock Deferred Tax Liabilities, FHLB and FRB Stock Deferred Tax Liabilities, FHLB and FRB Stock Goodwill and other intangible assets Deferred Tax Liabilities, Goodwill and Intangible Assets Federal tax credits Deferred Tax Liabilities, Tax Credits Deferred Tax Liabilities, Tax Credits Junior subordinated debentures Deferred Tax Liabilities, Business Combination, Junior Subordinated Debentures Deferred Tax Liabilities, Business Combination, Junior Subordinated Debentures Other deferred tax liabilities Deferred Tax Liabilities, Other ROU lease asset Deferred Tax Liabilities, Right of Use Asset Deferred Tax Liabilities, Right of Use Asset Net unrealized gains recognized in other comprehensive income on securities Deferred Tax Liabilities, Net Unrealized Gains Charged to Other Comprehensive Income on Securities Deferred Tax Liabilities, Net Unrealized Gains Charged to Other Comprehensive Income on Securities Total deferred tax liabilities Deferred Tax Liabilities, Gross Deferred tax (liability) asset, net Deferred Tax Liabilities, Net Deferred tax (liability) asset, net Deferred Tax Assets, Net Schedule of restricted stock award activity Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] Shares Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Nonvested at beginning of period (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number 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 Nonvested 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] Nonvested at beginning of period (in usd per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Vested (in usd 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 usd per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Nonvested at end of period (in usd per share) Restricted Stock Awards Award 1 Award 2 Compensation expense Allocated Share-based Compensation Expense Tax benefit Employee Service Share-based Compensation, Tax Benefit from Compensation Expense Total unrecognized compensation expense Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Share-based Awards Other than Options Weighted average, recognition period Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition Restricted stock awards issued, net of forfeitures Stock Issued During Period, Value, Restricted Stock Award, Gross Banking and Thrift [Abstract] Cash Requirement Regulatory Cash Requirements Under Banking Regulations [Text Block] Regulatory Cash Requirements Under Banking Regulations [Text Block] 2020 Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months 2021 Finite-Lived Intangible Assets, Amortization Expense, Year Two 2022 Finite-Lived Intangible Assets, Amortization Expense, Year Three 2023 Finite-Lived Intangible Assets, Amortization Expense, Year Four 2024 Finite-Lived Intangible Assets, Amortization Expense, Year Five Thereafter Finite-Lived Intangible Assets, Amortization Expense, after Year Five Intangible assets, net Finite-Lived Intangible Assets, Net Schedule of Impaired Financing Receivable [Table] Schedule of Impaired Financing Receivable [Table] Five or more family residential and commercial properties Five or More Family Residential and Commercial Properties [Member] Five or more family residential and commercial properties. Financing Receivable, Impaired [Line Items] Financing Receivable, Impaired [Line Items] Outstanding Principal Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance Certain Loans and Debt Securities Acquired in Transfer, with Related Allowance for Credit Losses Due to Subsequent Impairment Certain Loans and Debt Securities Acquired in Transfer, with Related Allowance for Credit Losses Due to Subsequent Impairment Fair Value, by Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping [Table] Recurring Fair Value, Measurements, Recurring [Member] Financial Instrument [Axis] Financial Instrument [Axis] Financial Instruments [Domain] Financial Instruments [Domain] U.S. Treasury and U.S. Government-sponsored agencies US Treasury and Government [Member] Municipal securities Municipal Bonds [Member] Residential mortgage-backed securities Residential Mortgage Backed Securities [Member] Commercial mortgage-backed securities Commercial Mortgage Backed Securities [Member] Corporate obligations Corporate Debt Securities [Member] Other Security Investments Other Security Investments [Member] Interest Rate Swap Interest Rate Swap [Member] Assets Assets, Fair Value Disclosure [Abstract] Fair Value Debt Securities, Available-for-sale Equity security Equity Securities, FV-NI Derivative assets - interest rate swaps Derivative Asset, Fair Value, Gross Asset Liabilities Liabilities, Fair Value Disclosure [Abstract] Derivative liabilities - interest rate swaps Derivative Liability, Fair Value, Gross Liability Range [Axis] Range [Axis] Range [Domain] Range [Domain] Minimum Minimum [Member] Maximum Maximum [Member] Number of loan segments Number of Loan Segments Number of loan segments. Maximum percent of appraised value or underlying collateral mortgage (not to exceed 80%) residential loans (percent) Maximum Loans and Leases Receivable Percent of Appraised Value or Underlying Collateral Mortgage Residential Loans Maximum loans and leases receivable percent of appraised value or underlying collateral mortgage residential loans. Loan term Loans and Leases Receivable, maturity Term Loans and leases receivable, maturity term. Maximum percentage consumer loans (percent) Loans and Leases Receivable Maximum Percentage Consumer Loans Loans and leases receivable maximum percentage consumer loans. Deposits [Abstract] Amount Deposits Liabilities, Balance Sheet, Reported Amounts [Abstract] Noninterest demand deposits Noninterest-bearing Domestic Deposit, Demand Interest bearing demand deposits Interest-bearing Domestic Deposit, Demand Money market accounts Interest-bearing Domestic Deposit, Money Market Savings accounts Interest-bearing Domestic Deposit, Savings Total non-maturity deposits Interest-bearing Domestic Deposit, Time Deposits Certificate of deposit accounts Interest-bearing Domestic Deposit, Certificates of Deposits Total deposits Percent Percentage of Interest-bearing Domestic Deposit Liabilities to Deposit Liabilities [Abstract] Noninterest demand deposits (as a percent) Percentage Of Noninterest-Bearing Domestic Deposit, Demand Percentage Of Noninterest-Bearing Domestic Deposit, Demand Interest bearing demand deposits (as a percent) Percentage of Interest-bearing Domestic Deposits to Deposits, Demand Money market accounts (as a percent) Percentage of Interest-bearing Domestic Deposits to Deposits, Money Market Savings accounts (as a percent) Percentage of Interest-bearing Domestic Deposits to Deposits, Savings Total non-maturity deposits (as a percent) Percentage of Interest-bearing Domestic Deposits to Deposits, Time Deposits Certificate of deposit accounts (as a percent) Percentage of Interest-bearing Domestic Deposits to Deposits, Certificates of Deposit Total deposits (as a percent) Percentage of Interest-bearing Domestic Deposits to Deposits Retirement Benefits [Abstract] Schedule of Defined Benefit Plans Disclosures [Table] Schedule of Defined Benefit Plans Disclosures [Table] Balance Sheet Location [Axis] Balance Sheet Location [Axis] Balance Sheet Location [Domain] Balance Sheet Location [Domain] Accrued Expenses and Other Liabilities Accrued Expenses and Other Liabilities [Member] Accrued Expenses and Other Liabilities [Member] Defined Benefit Plan Disclosure [Line Items] Defined Benefit Plan Disclosure [Line Items] Balance outstanding at the beginning of the year Salary Continuation Plan Salary Continuation Plan Balance acquired in Premier Merger Benefits paid Salary Continuation Plan Benefit Paid Salary Continuation Plan Benefit Paid Expenses incurred Salary Continuation Plan Expense Salary Continuation Plan Expense Balance outstanding at the end of the year Other Commitments [Table] Other Commitments [Table] Scenario [Axis] Scenario [Axis] Scenario, Unspecified [Domain] Scenario, Unspecified [Domain] Scenario, Forecast [Member] Scenario, Forecast [Member] Other Commitments [Line Items] Other Commitments [Line Items] Total outstanding commitments Unused Commitments to Extend Credit Condensed Financial Information Disclosure [Abstract] Heritage Financial Corporation (Parent Company Only) Condensed Financial Information of Parent Company Only Disclosure [Text Block] Income Taxes Income Tax Disclosure [Text Block] Organization, Consolidation and Presentation of Financial Statements [Abstract] Description of Business, Basis of Presentation and Significant Accounting Policies and Recently Issued Accounting Pronouncements Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Statement [Table] Statement [Table] Tax Period [Axis] Tax Period [Axis] Tax Period [Domain] Tax Period [Domain] Twenty Twenty [Member] Twenty Twenty [Member] Twenty Twenty [Member] Consolidated Entities [Axis] Consolidated Entities [Axis] Consolidated Entities [Domain] Consolidated Entities [Domain] Subsidiaries [Member] Subsidiaries [Member] Tax Credit Carryforward [Axis] Tax Credit Carryforward [Axis] Tax Credit Carryforward, Name [Domain] Tax Credit Carryforward, Name [Domain] Investment Tax Credit Carryforward [Member] Investment Tax Credit Carryforward [Member] Statement [Line Items] Statement [Line Items] Investments in Affordable Housing Limited Entities Investments in Affordable Housing Limited Entities Investments in Affordable Housing Limited Entities Affordable Housing Tax Credits and Other Tax Benefits, Amount Affordable Housing Tax Credits and Other Tax Benefits, Amount Amortization Method Qualified Affordable Housing Project Investments, Amortization Amortization Method Qualified Affordable Housing Project Investments, Amortization Qualified Affordable Housing Project Investments, Commitment Qualified Affordable Housing Project Investments, Commitment Qualified Affordable Housing Project Investments, Future Commitment Qualified Affordable Housing Project Investments, Future Commitment Qualified Affordable Housing Project Investments, Future Commitment Impairment losses on LIHTC investments Affordable Housing Project Investment, Write-down, Amount Carrying value of NMTC Investment in Certified Development Entities Investment in Certified Development Entities Investment income Income (Loss) from Affordable Housing Projects, Equity Method Investments Gross tax credits related to the Company's CDEs Tax Credit carryforward, Amount Subject to Expiration Tax Credit carryforward, Amount Subject to Expiration Changes in other real estate owned Other Real Estate, Roll Forward [Table Text Block] RSU Restricted Stock Units (RSUs) [Member] PRSU Performance-Based Restricted Stock Units (PRSUs) [Member] Performance-based Restricted Stock Units (PRSUs) [Member] Performance period Actual payout percentage Share-Based Compensation Arrangement By Share-Based Payment Award, Actual Payout Percentage Share-Based Compensation Arrangement By Share-Based Payment Award, Actual Payout Percentage Fair value of units that vested Unallocated Unallocated [Member] Unallocated. Schedule of allowance for loan losses on the basis of impairment method Charge-offs Recoveries Regulatory Capital Requirements [Abstract] Minimum capital requirements to maintain leverage ratio Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations [Table Text Block] Investments, Debt and Equity Securities [Abstract] Gross realized gains Debt Securities, Available-for-sale, Realized Gain Gross realized losses Debt Securities, Available-for-sale, Realized Loss Net realized gains Debt Securities, Available-for-sale, Realized Gain (Loss) Schedule of Financing Receivable, Troubled Debt Restructurings [Table] Schedule of Financing Receivable, Troubled Debt Restructurings [Table] Nonaccrual Nonaccrual [Member] nonaccrual [Member] Restructured performing Restructured Performing [Member] Restructured Performing [Member] Financing Receivable, Modifications [Line Items] Financing Receivable, Modifications [Line Items] Related Specific Valuation Allowance Impaired Financing Receivable, Related Allowance Average recorded investment of impaired loans Impaired Financing Receivable, Average Recorded Investment Interest income recognized Impaired Financing Receivable, Interest Income, Accrual Method Loans and Leases Receivable, Related Parties [Roll Forward] Loans and Leases Receivable, Related Parties [Roll Forward] Balance outstanding at beginning of year Loans and Leases Receivable, Related Parties Elimination of outstanding loan balance due to change in related party status Loans and Leases Receivable, Related Parties, Elimination Due to Change in Related Party Status Loans and Leases Receivable, Related Parties, Elimination Due to Change in Related Party Status Principal additions Loans and Leases Receivable, Related Parties, Additions Principal reductions Loans and Leases Receivable, Related Parties, Proceeds Balance outstanding at end of year Unfunded commitments to related parties Unfunded Commitments on Loans and Leases Receivable Related Parties Unfunded Commitments on Loans and Leases Receivable Related Parties Borrowings from related parties Borrowings from Related Parties Borrowings from Related Parties Fair value measurements of assets on a recurring basis Fair Value, Assets Measured on Recurring Basis [Table Text Block] Fair value measurements of assets on a nonrecurring basis Fair Value Measurements, Nonrecurring [Table Text Block] Fair value measurements for financial instruments measured at fair value on a non-recurring basis Fair Value, Assets and Liabilities Measured on Nonrecurring Basis, Valuation Techniques [Table Text Block] Schedule of carrying value and fair value of financial instruments Fair Value, by Balance Sheet Grouping [Table Text Block] Condensed statements of financial condition Condensed Balance Sheet [Table Text Block] Condensed statements of income Condensed Income Statement [Table Text Block] Condensed statements of cash flows Condensed Cash Flow Statement [Table Text Block] Schedule of stock option activity Share-based Compensation, Activity [Table Text Block] Schedule of restricted stock award activity Schedule of Share-based Compensation, Restricted Stock Units Award Activity [Table Text Block] Schedule of assumptions of PRSUs granted Schedule of Share-based Payment Award, Equity Instruments Other than Options, Valuation Assumptions [Table Text Block] Schedule of Share-based Payment Award, Equity Instruments Other than Options, Valuation Assumptions [Table Text Block] Summary of RSU activity Schedule of Nonvested Restricted Stock Units Activity [Table Text Block] Business Combinations [Abstract] Puget Sound Goodwill Goodwill, Acquired During Period Number of shares issued (in shares) Business Combination, Shares Of Common Stock Issued Of Acquired Entity Business Combination, Shares Of Common Stock Issued Of Acquired Entity Share price paid in cash (in usd per share) Business Acquisition, Share Price paid in Cash The cash paid per share as part of the consideration in a business combination Total consideration paid Business Combination, Consideration Transferred Total fair value of shares forfeited to pay applicable taxes Business Combination, Fair Value of Shares Issued in Merger but Forfeited to Pay Taxes Business Combination, Fair Value of Shares Issued in Merger but Forfeited to Pay Taxes Number of shares forfeited to pay applicable taxes (in shares) Acquisition-related costs Business Combination, Acquisition Related Costs Preliminary fair value estimates of assets acquired and liabilities assumed and adjustments Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block] Unaudited pro forma information Business Acquisition, Pro Forma Information [Table Text Block] Schedule of changes in allowance for loan losses Allowance for Credit Losses on Financing Receivables [Table Text Block] Schedule of loan receivables on the basis of impairment method Schedule of Financing Receivables for Credit Losses [Table Text Block] Schedule detailing information related to financing receivables by portfolio segment. A portfolio segment is a level at which an entity develops and documents a systematic methodology to determine its allowance for credit losses. Property, Plant and Equipment [Abstract] Schedule of premises and equipment Property, Plant and Equipment [Table Text Block] Derivative Instruments and Hedging Activities Disclosure [Abstract] Derivative [Table] Derivative [Table] Financial Instrument [Axis] Interest rate swaps Hedging Designation [Axis] Hedging Designation [Axis] Hedging Designation [Domain] Hedging Designation [Domain] Non-hedging interest rate derivatives Not Designated as Hedging Instrument [Member] Derivative Instrument [Axis] Derivative Instrument [Axis] Derivative Contract [Domain] Derivative Contract [Domain] Prepaid expenses and other assets Prepaid Expenses and Other Current Assets [Member] Accrued expenses and other liabilities Derivative [Line Items] Derivative [Line Items] Notional Amounts - Interest rate swaps with customer Derivative Asset, Notional Amount Notional Amounts - Interest rate swap with third party Derivative Liability, Notional Amount Estimated Fair Value - Interest rate swaps with customer Estimated Fair Value - Interest rate swap with third party Stockholders' Equity Note [Abstract] Subsequent Event [Table] Subsequent Event [Table] Dividends [Axis] Dividends [Axis] Dividends [Domain] Dividends [Domain] Special Dividend Special Dividend [Member] Special Dividend [Member] Subsequent Event [Line Items] Subsequent Event [Line Items] Declared Dividends Payable, Date Declared Cash dividends declared on common stock (in usd per share) Common Stock, Dividends, Per Share, Declared Record Date Dividends Payable, Date of Record Paid Date Dividends Payable, Date to be Paid Schedule of earnings per share reconciliation Schedule of Earnings Per Share Reconciliation [Abstract] Schedule of earnings per share reconciliation. Net income: Net Income (Loss) Available to Common Stockholders, Diluted [Abstract] Net income Net Income (Loss) Attributable to Parent Dividends and undistributed earnings allocated to participating securities(1) Dividends and Undistributed Earnings Dividends and undistributed earnings. Net income allocated to common shareholders Undistributed Earnings, Diluted Basic: Weighted Average Number of Shares Outstanding, Basic [Abstract] Weighted average common shares outstanding (in shares) Gross Weighted Average Number of Shares Outstanding Basic Gross weighted average number of shares outstanding basic. Restricted stock awards (in shares) Weighted Average Number of Shares, Restricted Stock Total basic weighted average common shares outstanding (in shares) Weighted Average Number of Shares Outstanding, Basic Diluted: Weighted Average Number of Shares Outstanding, Diluted [Abstract] Basic weighted average common shares outstanding (in shares) Effect of potentially dilutive common shares (in shares) Weighted Average Number Diluted Shares Outstanding Adjustment Total diluted weighted average common shares outstanding (in shares) Weighted Average Number of Shares Outstanding, Diluted Loans and Leases Receivable Disclosure [Abstract] Loan Receivable Financing Receivables [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 of premises and equipment, amortization of securities available for sale, and amortization of discount of junior subordinated debentures Depreciation, Amortization and Accretion, Net Changes in net deferred loan costs, net of amortization Amortization of Deferred Loan Origination Fees, Net Net change in accrued interest receivable, prepaid expenses and other assets, and accrued expenses and other liabilities Net Change in Accrued Interest Receivable, Prepaid Expenses and Other Assets, Accrued Expenses and Other Liabilities Net change in accrued interest receivable, prepaid expenses and other assets, accrued expenses and other liabilities. Stock based compensation expense Employee Benefits and Share-based Compensation Amortization of intangible assets Amortization of Intangible Assets Origination of mortgage loans held for sale Payments for Origination and Purchases of Loans Held-for-sale Proceeds from sale of mortgage loans held for sale Proceeds from Sale of Loans Held-for-sale Earnings on bank owned life insurance Bank Owned Life Insurance Income Valuation adjustment on other real estate owned Other Real Estate, Valuation Adjustments Loss (gain) on sale of other real estate owned, net Gains (Losses) on Sales of Other Real Estate Gain on sale of loans, net Gain (Loss) on Sale of Loans and Leases Gain on sale of investment securities, net Gain (Loss) on Sale of Investments Gain on sale of assets held for sale Gain (Loss) of Assets Held for Sale Gain (Loss) of Assets Held for Sale Impairment of assets held for sale Asset Impairment Charges Impairment of assets held for sale Impairment of Long-Lived Assets to be Disposed of (Gain) loss on sale of premises and equipment, net Gain (Loss) on Disposition of Property Plant Equipment 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 [Abstract] Loans originated, net of principal payments Payments for (Proceeds from) Loans and Leases Maturities, calls and payments of investment securities available for sale Proceeds from Maturities, Prepayments and Calls of Debt Securities, Available-for-sale Purchase of investment securities available for sale Payments to Acquire Available-for-sale Securities Proceeds from sales of investment securities available for sale Proceeds from Sale of Available-for-sale Securities Purchase of premises and equipment Payments to Acquire Property, Plant, and Equipment Proceeds from sales of other loans Proceeds from Sales of Assets, Investing Activities Proceeds from sales of other real estate owned Proceeds from Sale of Foreclosed Assets Proceeds from sales of assets held for sale Proceeds from Sale of Assets Held for Sale Proceeds from Sale of Assets Held for Sale Proceeds from redemption of Federal Home Loan Bank stock Payments for (Proceeds from) Federal Home Loan Bank Stock Purchases of Federal Home Loan Bank stock Payments to Acquire Federal Home Loan Bank Stock Proceeds from sales of premises and equipment Proceeds from Sale of Property, Plant, and Equipment Purchase of bank owned life insurance Purchase bank owned life insurance Purchase bank owned life insurance Proceeds from bank owned life insurance death benefit Proceeds from Life Insurance Policy Capital contributions to low-income housing tax credit partnerships and new market tax credit partnerships, net Change in low income tax housing tax credit partnership Change in low income tax housing tax credit partnership Net cash received from acquisitions Cash Acquired from Acquisition 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 Federal Home Loan Bank advances Increase (Decrease) in Loans to Federal Home Loan Banks Repayment of Federal Home Loan Bank advances Repayments of Debt Common stock cash dividends paid Payments of Ordinary Dividends, Common Stock Net (decrease) increase in securities sold under agreement to repurchase Increase (Decrease) in Receivables under Repurchase Agreements Proceeds from exercise of stock options Proceeds from Stock Options Exercised Repurchase of common stock Payments for Repurchase of Common Stock Net cash provided by financing activities Net Cash Provided by (Used in) Financing Activities Net increase (decrease) in cash and cash equivalents Cash and Cash Equivalents, Period Increase (Decrease) Cash and cash equivalents at beginning of year Cash and cash equivalents at end of year Supplemental disclosures of cash flow information: Supplemental Cash Flow Information [Abstract] Cash paid for interest Interest Paid, Excluding Capitalized Interest, Operating Activities Cash paid for income taxes, net of refunds Income Taxes Paid, Net Supplemental non-cash disclosures of cash flow information: Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] Transfers of loans receivable to other real estate owned Real Estate Owned, Transfer to Real Estate Owned Transfers of properties held for sale recorded in premises and equipment, net to prepaid expenses and other assets Transfer of Property and Equipment to Prepaid Expenses and Other Assets Held-for-sale Transfer of Property and Equipment to Prepaid Expenses and Other Assets Held-for-sale Investment in low income housing tax credit partnership and related funding commitment Investment in low income housing tax partnership Investment in low income housing tax partnership Transfer of bank owned life insurance to prepaid expenses and other assets Transfer of Bank Owned Life Insurance To Prepaid Expenses And Other Assets Transfer of Bank Owned Life Insurance To Prepaid Expenses And Other Assets Business Combinations: Common stock issued in business combinations Stock Issued During Period, Value, Acquisitions Assets acquired (liabilities assumed) in acquisitions: Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract] Investment securities available for sale Noncash or Part Noncash Acquisition Investment Available for Sale Noncash or part noncash acquisition investment available for sale. Loans receivable Noncash or Part Noncash Acquisition Purchased Non Covered Loans Receivable Noncash or part noncash acquisition purchased non covered loans receivable. Other real estate owned Noncash or Part Noncash Acquisition Other Real Estate Owned Noncash or part noncash acquisition other real estate owned. Premises and equipment Noncash or Part Noncash Acquisition, Fixed Assets Acquired Federal Home Loan Bank stock Noncash or Part Noncash Acquisition Accounts FHLB Stock Acquired Noncash or part noncash acquisition accounts FHLB stock acquired. Accrued interest receivable Noncash or Part Noncash Acquisition, Accounts Receivable Acquired Bank owned life insurance Noncash or Part Noncash, Bank Owned Life Insurance acquired Noncash or Part Noncash, Bank Owned Life Insurance acquired Prepaid expenses and other assets Noncash or Part Noncash Acquisition, Other Assets Acquired Other intangible assets Noncash or Part Noncash Acquisition, Intangible Assets Acquired Deposits Noncash or Part Noncash Acquisition Deposits Liability Noncash or part noncash acquisition deposits liability. Federal Home Loan Bank advances Noncash or Part Noncash Acquisition, Debt Assumed Securities sold under agreement to repurchase noncash or part noncash acquisition, securities sold under agreements to repurchase Noncash or Part Noncash Acquisition, Securities Sold Under Agreements to Repurchase Accrued expenses and other liabilities Noncash or Part Noncash Acquisition, Other Liabilities Assumed Accrued interest payable on deposits Deposit Liabilities, Accrued Interest Certificates of deposit equal to or in excess of $250,000 Time Deposits, $250,000 or More, Domestic Time Deposits, $250,000 or More, Domestic Related Party Deposit Liabilities Related Party Deposit Liabilities Schedule of earnings per share reconciliation Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Schedule of dividends activity Schedule of Dividends Activity [Table Text Block] Schedule of dividends activity. Schedule of repurchased shares Class of Treasury Stock [Table Text Block] Disclosure of Repurchase Agreements [Abstract] Repurchase agreement obligation by class of collateral pledged Schedule of Repurchase Agreements [Table Text Block] Summary of outstanding commitments to extend credit, including letters of credit Outstanding Commitments to Extend Credit and Letters of Credit [Table Text Block] Outstanding Commitments to Extend Credit and Letters of credit. Loans held for sale Loans and Leases Receivable Disclosure [Table] Loans and Leases Receivable Disclosure [Table] Loans and Leases Receivable Disclosure [Line Items] Loans and Leases Receivable Disclosure [Line Items] One-to-four family residential loans: Mortgage Banking [Abstract] Originated Payments for Origination of Mortgage Loans Held-for-sale Sold Proceeds from Sale of Mortgage Loans Held-for-sale Gains on sales of loans, net Gain (Loss) on Sale of Mortgage Loans Contractual amounts of commitments to sell and fund with off-balance sheet risk: Contractual Amounts of Commitments [Abstract] Contractual Amounts of Commitments [Abstract] Commitments to sell mortgage loans Loans and Leases Receivable, Commitments to Purchase or Sell Commitments to fund mortgage loans (at interest rates approximating market rates) for portfolio or for sale: Commitments to Fund Mortgage Loans [Abstract] Commitments to Fund Mortgage Loans [Abstract] Fixed rate Loans and Leases Receivable, Commitments, Fixed Rates Variable or adjustable rate Loans and Leases Receivable, Commitments, Variable Rates Total commitments to fund mortgage loans Loans and Leases Receivable, Total Commitments to Purchase or Sell Loans and Leases Receivable, Total Commitments to Purchase or Sell Changes in deferred compensation plan Deferred Compensation Agreement with Individual, Contributions by Employer [Table Text Block] [Table Text Block] for Deferred Compensation Agreement with Individual, Contributions by Employer [Table] Salary continuation plan Salary Continuation Plan [Table Text Block] Salary Continuation Plan [Table Text Block] Other Real Estate Owned Real Estate Owned [Text Block] Required reserve balance Restricted Cash and Cash Equivalents Reconciliation of available for sale securities Schedule of Available-for-sale Securities Reconciliation [Table Text Block] Schedule of securities available for sale Available-for-sale Securities [Table Text Block] Schedule of fair value and unrealized losses of available for sale investment securities Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Table Text Block] Gross realized gains and losses on sale of securities available for sale Schedule of Realized Gain (Loss) [Table Text Block] Scheduled of amortized cost and fair value of securities pledged as collateral Schedule of Financial Instruments Owned and Pledged as Collateral [Table Text Block] Document and Entity Information [Abstract] Document and entity information. Document Type Document Type Entity Registrant Name Entity Registrant Name Entity Central Index Key Entity Central Index Key Document Period End Date Document Period End Date Amendment Flag Amendment Flag Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Current Fiscal Year End Date Current Fiscal Year End Date 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 Entity Public Float Entity Public Float Entity Well-known Seasoned Issuer Entity Well-known Seasoned Issuer Entity Voluntary Filers Entity Voluntary Filers Entity Current Reporting Status Entity Current Reporting Status Net interest income Business Acquisition, Pro Forma Revenue Net income Business Acquisition, Pro Forma Net Income (Loss) Basic earnings per common share (in usd per share) Business Acquisition, Pro Forma Earnings Per Share, Basic Diluted earnings per common share (in usd per share) Business Acquisition, Pro Forma Earnings Per Share, Diluted Derivative Financial Instruments Derivative Instruments and Hedging Activities Disclosure [Text Block] Securities classified as trading Debt Securities, Trading, and Equity Securities, FV-NI Securities classified as held to maturity Debt Securities, Held-to-maturity OTTI, unrealized losses Other-than-temporary Impairment Loss, Debt Securities, Held-to-maturity, Recognized in Earnings, before Tax Statement of Comprehensive Income [Abstract] AOCI attributable to parent AOCI Attributable to Parent [Member] Change in fair value of investment securities available for sale, net of tax of $4,834, $(1,591) and $826, respectively Other Comprehensive Income (Loss), Securities, Available-for-Sale, Unrealized Holding Gain (Loss) Arising During Period, after Tax Reclassification adjustment for net gain from sale of investment securities available for sale included in income, net of tax of $(69), $(29) and $(2), respectively Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax Other comprehensive income (loss) Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Comprehensive income Comprehensive Income (Loss), Net of Tax, Attributable to Parent Goodwill and Other Intangible Assets Goodwill Disclosure [Text Block] SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate Schedule [Table] SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate Schedule [Table] SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] Carrying amount of other real estate owned from foreclosure Other Real Estate, Foreclosed Assets, and Repossessed Assets Mortgage loans secured by residential real estate properties Mortgage Loans in Process of Foreclosure, Amount Line of Credit Facility [Table] Line of Credit Facility [Table] Credit Facility [Axis] Credit Facility [Axis] Credit Facility [Domain] Credit Facility [Domain] Federal Reserve Bank Advances Federal Reserve Bank Advances [Member] Line of Credit Facility [Line Items] Line of Credit Facility [Line Items] Credit facility, maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Borrowings outstanding on credit facility Line of Credit Facility, Fair Value of Amount Outstanding Statement of Stockholders' Equity [Abstract] Dividends declared per common share (in usd per share) Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Balance at the beginning of the year Other comprehensive income (loss) before reclassification Amounts reclassified from AOCI for gain on sale of investment securities included in net income Other comprehensive (loss) income ASU Implementation Cumulative Effect of New Accounting Principle in Period of Adoption Balance at the end of the year Allowance for Loan Losses Allowance for Credit Losses [Text Block] Measurement Input Type [Axis] Measurement Input Type [Axis] Measurement Input Type [Domain] Measurement Input Type [Domain] Measurement Input, Discount Rate Measurement Input, Discount Rate [Member] Measurement Input, Prepayment Rate Measurement Input, Prepayment Rate [Member] Servicing Asset, Measurement Input Servicing Asset, Measurement Input Valuation Allowance for Impairment of Recognized Servicing Assets, Balance Valuation Allowance for Impairment of Recognized Servicing Assets, Balance Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations [Table] Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations [Table] Legal Entity [Axis] Legal Entity [Axis] Entity [Domain] Entity [Domain] Heritage Bank Heritage Bank [Member] Heritage bank. Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] Common Equity Tier One Capital Required for Capital Adequacy Common Equity Tier One Capital Required for Capital Adequacy Common Equity Tier One Capital Required for Capital Adequacy to Average Assets Common Equity Tier One Capital Required for Capital Adequacy to Average Assets Common Equity Tier One Capital Required for Capital Adequacy to Average Assets Common Equity Tier One Capital Required to be Well-Capitalized Common Equity Tier One Capital Required to be Well-Capitalized Common Equity Tier One Capital Required to be Well Capitalized to Average Assets Common Equity Tier One Capital Required to be Well Capitalized to Average Assets Common Equity Tier One Capital Required to be Well Capitalized to Average Assets Common Equity Tier One Capital Common Equity Tier One Capital Common Equity Tier One Capital to Average Assets Common Equity Tier One Capital to Average Assets Common Equity Tier One Capital to Average Assets Tier One Leverage Capital Required for Capital Adequacy Tier One Leverage Capital Required for Capital Adequacy Tier One Leverage Capital Required for Capital Adequacy to Average Assets Tier One Leverage Capital Required for Capital Adequacy to Average Assets Tier One Leverage Capital Required to be Well Capitalized Tier One Leverage Capital Required to be Well Capitalized Tier One Leverage Capital Required to be Well Capitalized to Average Assets Tier One Leverage Capital Required to be Well Capitalized to Average Assets Tier One Leverage Capital Tier One Leverage Capital Tier One Leverage Capital to Average Assets Tier One Leverage Capital to Average Assets Tier One Risk Based Capital Required for Capital Adequacy Tier One Risk Based Capital Required for Capital Adequacy Tier One Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets Tier One Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets Tier One Risk Based Capital Required to be Well Capitalized Tier One Risk Based Capital Required to be Well Capitalized Tier One Risk Based Capital Required to be Well Capitalized to Risk Weighted Assets Tier One Risk Based Capital Required to be Well Capitalized to Risk Weighted Assets Tier One Risk Based Capital Tier One Risk Based Capital Tier One Risk Based Capital to Risk Weighted Assets Tier One Risk Based Capital to Risk Weighted Assets Capital Required for Capital Adequacy Capital Required for Capital Adequacy Capital Required for Capital Adequacy to Risk Weighted Assets Capital Required for Capital Adequacy to Risk Weighted Assets Capital Required to be Well Capitalized Capital Required to be Well Capitalized Capital Required to be Well Capitalized to Risk Weighted Assets Capital Required to be Well Capitalized to Risk Weighted Assets Capital Capital Capital to Risk Weighted Assets Capital to Risk Weighted Assets Capital Conservation Buffer, Company Capital Conservation Buffer, Company Capital Conservation Buffer, Company Capital Conservation Buffer, Bank Capital Conservation Buffer, Bank Capital Conservation Buffer, Bank 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] 30-89 Days Financing Receivables, 30 to 89 Days Past Due [Member] Financing Receivables, 30 to 89 Days Past Due [Member] 90 Days or Greater 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 Gross Loan and Lease Receivable excluding PCI Loans Loan and Lease Receivable, Gross excluding Purchase Credit Impaired Loans Loan and Lease Receivable, Gross excluding Purchase Credit Impaired Loans Loans and Leases Receivable, Gross Loans and Leases Receivable, Gross 90 Days or More and Still Accruing Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing Schedule of notional amounts and estimated fair values of interest rate derivative contracts Schedule of Notional Amounts of Outstanding Derivative Positions [Table Text Block] Stockholders' Equity Stockholders' Equity Note Disclosure [Text Block] Net operating loss carryforward Operating Loss Carryforwards Valuation allowance SEC Schedule, 12-09, Valuation Allowances and Reserves, Amount Taxable temporary difference Bad Debt Reserve forTax Purposes of Qualified Lender Deferred tax liability not recognized Deferred Tax Liability Not Recognized, Amount of Unrecognized Deferred Tax Liability, Bad Debt Reserve for Tax Purposes of Qualified Lender Anti-dilutive securities excluded from computation Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets [Abstract] Cash and cash equivalents Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents Interest earning deposits Business Combination Recognized Identifiable Assets Acquired and Liabilities Assumed Interest Earning Deposits Business Combination Recognized Identifiable Assets Acquired and Liabilities Assumed Interest Earning Deposits Investment securities available for sale Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Marketable Securities Loans receivable Business Combination, Acquired Receivable, Fair Value Other real estate owned Business Combination, Other Real Estate Owned Business Combination, Other Real Estate Owned Premises and equipment, net Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment Federal Home Loan Bank stock, at cost Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Federal Home Loan Bank Stock Business acquisition purchase price allocation federal home loan bank stock. Bank owned life insurance Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Bank Owned Life Insurance Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Bank Owned Life Insurance Accrued interest receivable Business Combination Recognized Identifiable Assets Acquired and Liabilities Assumed Accrued Interest Receivable Business Combination Recognized Identifiable Assets Acquired and Liabilities Assumed Accrued Interest Receivable Prepaid expenses and other assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Prepaid Expense and Other Assets Other intangible assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill Total assets acquired Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets Liabilities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities [Abstract] Deposits Business Combination Recognized Identifiable Assets Acquired and Liabilities Assumed, Deposit Liabilities Business Combination Recognized Identifiable Assets Acquired and Liabilities Assumed, Deposit Liabilities Federal Home Loan Bank advances Business Combination, Long-term Federal Home Loan Bank Advances Business Combination, Long-term Federal Home Loan Bank Advances Securities sold under agreement to repurchase Business Combination, Securities Sold under Agreements to Repurchase Business Combination, Securities Sold under Agreements to Repurchase Total liabilities acquired Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities Total liabilities acquired Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities Fair value of net assets acquired Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net Gross loans receivable Stock-Based Compensation Disclosure of Share-based Compensation Arrangements by Share-based Payment Award [Table Text Block] SBA Loans [Table] SBA Loans [Table] SBA Loans [Table] Receivable Type [Axis] Receivable Type [Axis] Receivable [Domain] Receivable [Domain] SBA Loans SBA Loans [Member] SBA Loans [Member] SBA Loans [Line Items] SBA Loans [Line Items] [Line Items] for SBA Loans [Table] Loans serviced for others with participating interest, gross loan balance Participating Loans Borrower Obligations Amount The aggregate amount of the participating loan obligation at the end of the accounting period. SBA loans serviced for others with participating interest, participation balance owned by Bank Transfer of Financial Assets Accounted for as Sales, Amount Derecognized Servicing fee income and fees from SBA loans serviced for others Fees and Commissions, Mortgage Banking and Servicing Mortgage Loans in Process of Foreclosure, Amount Changes in other real estate owned Other Real Estate [Roll Forward] Balance at the beginning of the year Additions Other Real Estate, Additions Additions from acquisitions Proceeds from dispositions Other Real Estate, Disposals (Loss) gain on sale, net Valuation adjustment Balance at the end of the year Fair value of derivative instruments Interest Rate Derivatives, at Fair Value, Net Investment Securities Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] Number of operating segments Number of Operating Segments Investment Holdings [Table] Investment Holdings [Table] Investment Holdings [Line Items] Investment Holdings [Line Items] Fair Value Debt Securities, Available-for-sale, Unrealized Loss Position [Abstract] Less than 12 Months Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months Total Debt Securities, Available-for-sale, Unrealized Loss Position Less than 12 Months Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer 12 Months or Longer Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss Total Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss Weighted average rate of junior debentures Schedule Of Weighted Average Rate Of Debt [Table Text Block] Schedule Of Weighted Average Rate Of Debt [Table Text Block] Junior Subordinated Debentures Debt Disclosure [Text Block] Reported Value Measurement Fair Value 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] Schedule of carrying value and fair value of financial instruments Financial Instruments Financial Assets and Liabilities Balance Sheet Groupings [Abstract] Financial instruments financial assets and liabilities balance sheet groupings. Financial Assets: Cash and cash equivalents Cash and Cash Equivalents, Fair Value Disclosure Investment securities available for sale Investments, Fair Value Disclosure Federal Home Loan Bank stock Investment in Federal Home Loan Bank Stock, Fair Value Disclosure Loans held for sale Loans Held-for-sale, Fair Value Disclosure Total loans receivable, net Accrued interest receivable Accounts Receivable, Fair Value Disclosure Derivative assets - interest rate swaps Interest Rate Derivative Assets, at Fair Value Financial Liabilities: Noninterest deposits, interest bearing demand deposits, money market accounts and savings accounts Deposits, Fair Value Disclosure Certificate of deposit accounts Securities sold under agreement to repurchase Securities Loaned or Sold under Agreements to Repurchase, Fair Value Disclosure Junior subordinated debentures Subordinated Debt Obligations, Fair Value Disclosure Accrued interest payable Accrued Liabilities, Fair Value Disclosure Derivative liabilities - interest rate swaps Premises and Equipment Property, Plant and Equipment Disclosure [Text Block] Balance outstanding at the beginning of the year Deferred Compensation Arrangement with Individual, Recorded Liability Employer contributions Deferred Compensation Arrangement with Individual, Contributions by Employer Interest credited Deferred Compensation Arrangements with individual, Contribution by employer Investment Return Deferred Compensation Arrangements with individual, Contribution by Employer Investment Return Balance outstanding at the end of the year Schedule of Assets Sold under Agreements to Repurchase [Table] Schedule of Assets Sold under Agreements to Repurchase [Table] Assets Sold under Agreements to Repurchase [Line Items] Assets Sold under Agreements to Repurchase [Line Items] Maturity period Repurchase Agreements, Maturity Period Repurchase Agreements, Maturity Period Repurchase agreement obligations Common stock Common Stock [Member] Retained earnings Retained Earnings [Member] Accumulated other comprehensive income (loss), net Balance at beginning of the year, shares Shares, Outstanding Restricted stock awards forfeited, shares Stock Issued During Period, Shares, Restricted Stock Award, Forfeited Restricted stock awards forfeited Stock Issued During Period, Value, Restricted Stock Award, Forfeitures Exercise of stock options, shares Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Exercise of stock options Stock Issued During Period, Value, Stock Options Exercised Stock-based compensation expense Adjustments to Additional Paid in Capital, Share-based Compensation, Restricted Stock Unit or Restricted Stock Award, Requisite Service Period Recognition Common stock repurchased, shares Stock Repurchased and Retired During Period, Shares Common stock repurchased Stock Repurchased and Retired During Period, Value Other comprehensive income (loss), net of tax Common stock issued in business combinations, shares Stock Issued During Period, Shares, Acquisitions Cash dividends declared on common stock Dividends, Common Stock, Cash Balance at end of the year, shares Option 1 Option 2 Option Two [Member] Option two. Employee Stock Option Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period Intrinsic value of options exercised Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value Schedule of Available-for-sale Securities [Table] Schedule of Available-for-sale Securities [Table] Debt Securities, Available-for-sale [Line Items] Debt Securities, Available-for-sale [Line Items] 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 Schedule of loans receivable Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] Loans receivable by credit quality indicator Financing Receivable Credit Quality Indicators [Table Text Block] Schedule of nonaccrual loans Schedule of Financing Receivables, Non Accrual Status [Table Text Block] Past due financing receivables Past Due Financing Receivables [Table Text Block] Schedule of impaired loans, including restructured Impaired Financing Receivables [Table Text Block] Schedule of average recorded investment impaired loans including restructuring loans Schedule of Average Recorded Investment Impaired Loans Including Restructuring Loans [Table Text Block] Schedule of average recorded investment impaired loans including restructuring loans. Recorded investment balance and related allowance for loan losses of accruing and non-accruing TDRs Troubled Debt Restructurings of Financing Receivables on Basis of Accruing and Non Accruing [Table Text Block] Troubled debt restructurings of financing receivables on basis of accruing and non accruing. Troubled debt restructurings on financing receivables Troubled Debt Restructurings on Financing Receivables [Table Text Block] Troubled debt restructuring loans, subsequently defaulted Troubled Debt Restructurings Loans Subsequently Defaulted [Table Text Block] Troubled debt restructurings loans subsequently defaulted. Purchased impaired loans Schedule of Financing Receivables Loans Acquired with Credit Deterioration [Table Text Block] Schedule of financing receivables loans acquired with credit deterioration. Schedule of impaired purchased loans accretable yield Schedule of Impaired Purchased Loans Accretable Yield [Table Text Block] Schedule of impaired purchased loans accretable yield. Activity in related party loans Schedule of Related Party Transactions [Table Text Block] Mortgage banking activities Loans and Leases Receivable, Mortgage Banking Activities [Table Text Block] Loans and Leases Receivable, Mortgage Banking Activities [Table Text Block] Contractual amounts of commitments to sell and fund with off-balance sheet risk Contractual Amounts of Commitments with Off-balance Sheet Risk [Table Text Block] Contractual Amounts of Commitments with Off-balance Sheet Risk [Table Text Block] Details of SBNA loans serviced Summary of Servicing of Financial Assets [Table Text Block] Summary of Servicing of Financial Assets [Table Text Block] Changes in Servicing Asset Servicing Asset at Amortized Cost [Table Text Block] Leases Lessee, Operating Leases [Text Block] Allowance for off-balance sheet financial instruments Allowance for Loan losses for Off Balance Sheet Financial Instruments Allowance for Loan losses for Off Balance Sheet Financial Instruments Loan Restructuring Modification [Axis] Loan Restructuring Modification [Axis] Loan Restructuring Modification [Domain] Loan Restructuring Modification [Domain] Modified subsequently Finance Receivable Modified Subsequent Default [Member] Finance Receivable Modified Subsequent Default [Member] Past Modified Maturity Date Past Modified Maturity Date [Member] Past Modified Maturity Date [Member] Troubled Debt Restructured Loans Troubled Debt Restructured Loans [Member] Troubled debt restructured loans. Number of Contracts Financing Receivable, Modifications, Number of Contracts Outstanding Principal Balance Financing Receivable, Modifications, Post-Modification Recorded Investment Initial advance at the time of modification Loans and Leases Receivable, Impaired, Initial Loan DIsbursement Loans and Leases Receivable, Impaired by Modification, Initial Loan Disbursement on construction-type loans. Number of Contracts Financing Receivable, Modifications, Subsequent Default, Number of Contracts Recorded Investment Financing Receivable, Modifications, Subsequent Default, Recorded Investment Securities Sold Under Agreements to Repurchase Disclosure of Repurchase Agreements [Text Block] Disclosure of Repurchase Agreements [Text Block] Income Statement [Abstract] INTEREST INCOME: Interest and Dividend Income, Operating [Abstract] Interest and fees on loans Interest and Fee Income, Loans and Leases Taxable interest on investment securities Interest Income, Securities, Operating, Taxable Nontaxable interest on investment securities Interest Income, Securities, Operating, Tax Exempt Interest on other interest earning assets Other Interest and Dividend Income Total interest income Interest and Dividend Income, Operating INTEREST EXPENSE: Interest Expense [Abstract] Deposits Interest Expense, Deposits Junior subordinated debentures Interest Expense, Junior Subordinated Debentures Other borrowings Interest Expense, Borrowings Total interest expense Interest Expense Net interest income Interest Income (Expense), Net Net interest income after provision for loan losses Interest Income (Expense), after Provision for Loan Loss NONINTEREST INCOME: Noninterest Income [Abstract] Service charges and other fees Investment Banking, Advisory, Brokerage, and Underwriting Fees and Commissions Gain on sale of investment securities, net Debt and Equity Securities, Realized Gain (Loss) Gain on sale of loans, net Gain (Loss) on Sales of Loans, Net Interest rate swap fees Interest Rate Swap Fee Income Interest Rate Swap Fee Income Other income Noninterest Income, Other Total noninterest income Noninterest Income NONINTEREST EXPENSE: Noninterest Expense [Abstract] Compensation and employee benefits Labor and Related Expense Occupancy and equipment Occupancy, Net Data processing Communications and Information Technology Marketing