Receivables [Abstract] Schedule of Accounts, Notes, Loans and Financing Receivable [Table] Schedule of Accounts, Notes, Loans and Financing Receivable [Table] Receivable Type [Axis] Receivable Type [Axis] Receivable [Domain] Receivable [Domain] Loans and lease receivables Loans and Finance Receivables [Member] Real estate loans Real Estate Loan [Member] Commercial and industrial loans Commercial And Industrial Loans [Member] Commercial and industrial loans. Accounts, Notes, Loans and Financing Receivable [Line Items] Accounts, Notes, Loans and Financing Receivable [Line Items] Accrued interest receivable Interest Receivable Loans and leases receivable pledged to secure advances Loans Pledged as Collateral Loans and leases 90 days or more past due and still accruing Financing Receivable, 90 Days or More Past Due, Still Accruing Commitments to lend additional funds to borrowers whose loans are impaired Financing Receivable, Troubled Debt Restructuring, Commitment to Lend TDR loans receivable Loans Held For Sale Excluded From Tdr Loans Receivable Loans held for sale excluded from TDR loans receivable. Principal and interest due Maximum Period For Interest To Be Due Maximum period for interest to be due. Reserves relating to loans included in allowance for loan losses Reserve Related To Tdr Loans Included In Allowance For Loan Losses Reserve related to TDR loans included in the allowance for loan losses. Loans modified within last twelve months Financing Receivable, Troubled Debt Restructuring, Increase (Decrease) from Modification Number of loans modified within last twelve months Financing Receivable, Modifications, Number of Contracts Increase in allowance Financing Receivable, Troubled Debt Restructuring, Allowance for Credit Loss, Period Increase (Decrease) Financing Receivable, Troubled Debt Restructuring, Allowance for Credit Loss, Period Increase (Decrease) Risks and Uncertainties [Abstract] Off-Balance Sheet Commitments Concentration Risk Disclosure [Text Block] Statement of Financial Position [Abstract] Amortized cost of securities available for sale Debt Securities, Available-for-sale, Amortized Cost Allowance for loan losses of loans receivable Loans and Leases Receivable, Allowance Preferred stock par value (in usd per share) Preferred Stock, Par or Stated Value Per Share Preferred stock authorized (shares) Preferred Stock, Shares Authorized Preferred stock issued (shares) Preferred Stock, Shares Issued Common stock par value (in usd per share) Common Stock, Par or Stated Value Per Share Common stock authorized (shares) Common Stock, Shares Authorized Common stock issued (shares) Common Stock, Shares, Issued Common stock outstanding (shares) Common Stock, Shares, Outstanding Accumulated other comprehensive loss, tax expense/(benefit) Accumulated Other Comprehensive Income Loss Tax Unrealized gain on securities available for sale and interest only strips, net of income tax. Treasury stock (shares) Treasury Stock, Shares Fair Value Disclosures [Abstract] Fair Value, by Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping [Table] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Quoted Prices in Active Markets for Identical Assets Fair Value, Inputs, Level 1 [Member] Significant Observable Inputs with No Active Market with Identical Characteristics Fair Value, Inputs, Level 2 [Member] Significant Unobservable Inputs Fair Value, Inputs, Level 3 [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 Amount Reported Value Measurement [Member] 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] Financial assets: Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] Cash and due from banks Cash and Due from Banks Securities available for sale Debt Securities, Available-for-sale Loans held for sale Loans Held-for-sale, Fair Value Disclosure Loans and leases receivable, net of allowance for loan and lease losses Loans Receivable, Fair Value Disclosure Financial liabilities: Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract] Noninterest-bearing deposits Noninterest-bearing Deposit Liabilities Interest-bearing deposits Interest-bearing Deposit Liabilities Borrowings and subordinated debentures Debt Instrument, Fair Value Disclosure Accrued interest payable Interest Payable Financing Receivable, Past Due [Table] Financing Receivable, Past Due [Table] Financial Instrument [Axis] Financial Instrument [Axis] Financial Instruments [Domain] Financial Instruments [Domain] Leases Receivable Finance Leases Portfolio Segment [Member] Consumer loans Consumer Loan [Member] Class of Financing Receivable [Axis] Class of Financing Receivable [Axis] Class of Financing Receivable [Domain] Class of Financing Receivable [Domain] Commercial property loans [Member] Commercial Property Real Estate Loans [Member] Commercial Property Real Estate Loans [Member] Retail Commercial Real Estate Retail [Member] Commercial real estate Retail. Hospitality Hotel and Motel [Member] Hotel and Motel [Member] Other Commercial Real Estate Other [Member] Commercial real estate other. Construction Commercial Real Estate Construction [Member] Commercial Real Estate Construction [Member] Residential property Residential Property Real Estate Loan [Member] Residential property real estate loan. Financing Receivable, Past Due [Line Items] Financing Receivable, Past Due [Line Items] Total non-accrual Non-PCI loans and leases Financing Receivable, Nonaccrual Banking and Thrift [Abstract] Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations [Table] Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations [Table] Consolidated Entities [Axis] Consolidated Entities [Axis] Consolidated Entities [Domain] Consolidated Entities [Domain] Hanmi Financial Parent Company [Member] Hanmi Bank Subsidiaries [Member] Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] Capital conservation buffer (percent) Capital Conservation Buffer, Actual, Percent Capital Conservation Buffer, Actual, Percent Actual Capital, Total capital to risk-weighted assets Capital Actual Capital, Tier 1 capital to risk-weighted assets Tier One Risk Based Capital Actual Capital, Common equity Tier 1 capital to risk-weighted assets Tier One Common Equity Tier One Common Equity Actual Capital, Tier 1 capital to average assets Tier One Leverage Capital Actual Capital Ratio, Total capital to risk-weighted assets Capital to Risk Weighted Assets Actual Capital Ratio, Tier 1 capital to risk-weighted assets Tier One Risk Based Capital to Risk Weighted Assets Actual Capital Ratio, Common equity Tier 1 capital to risk-weighted assets Tier One Common Capital to Risk Weighted Assets Tier One Common Capital to Risk Weighted Assets Actual Capital Ratio, Tier 1 capital to average assets Tier One Leverage Capital to Average Assets Minimum Regulatory Requirement Capital, Total capital to risk-weighted assets Capital Required for Capital Adequacy Minimum Regulatory Requirement Capital, Tier 1 capital to risk-weighted assets Tier One Risk Based Capital Required for Capital Adequacy Minimum Regulatory Requirement Capital, Common equity Tier 1 capital to risk-weighted assets Tier One Common Equity Required For Capital Adequacy Tier One Common Equity Required For Capital Adequacy Minimum Regulatory Requirement Capital, Tier 1 capital to average assets Tier One Leverage Capital Required for Capital Adequacy Minimum Regulatory Requirement Ratio for Total capital to risk-weighted assets Capital Required for Capital Adequacy to Risk Weighted Assets Minimum Regulatory Requirement Ratio for Tier 1 capital to risk-weighted assets Tier One Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets Minimum Regulatory Requirement Ratio for Common equity Tier 1 capital to risk-weighted assets Tier One Common Capital Required for Capital Adequacy to Risk Weighted Assets Tier One Common Capital Required for Capital Adequacy to Risk Weighted Assets Minimum Regulatory Requirement Ratio for Tier 1 capital to average assets Tier One Leverage Capital Required for Capital Adequacy to Average Assets Minimum to Be Categorized as Well Capitalized Capital, Total capital to risk-weighted assets Capital Required to be Well Capitalized Minimum to Be Categorized as Well Capitalized Capital, Tier 1 capital to risk-weighted assets Tier One Risk Based Capital Required to be Well Capitalized Minimum to Be Categorized as Well Capitalized Capital, Common equity Tier 1 capital to risk-weighted assets Tier One Common Capital Required to be Well Capitalized Tier One Common Capital Required to be Well Capitalized Minimum to Be Categorized as Well Capitalized Capital, Tier 1 capital to average assets Tier One Leverage Capital Required to be Well Capitalized Minimum to Be Categorized as Well Capitalized Ratio, Total capital to risk-weighted assets Capital Required to be Well Capitalized to Risk Weighted Assets Minimum to Be Categorized as Well Capitalized Ratio, Tier 1 capital to risk-weighted assets Tier One Risk Based Capital Required to be Well Capitalized to Risk Weighted Assets Minimum to Be Categorized as Well Capitalized Ratio, Common equity Tier 1 capital to risk-weighted assets Tier One Common Capital Required to be Well Capitalized to Risk Weighted Assets Tier One Common Capital Required to be Well Capitalized to Risk Weighted Assets Minimum to Be Categorized as Well Capitalized Ratio, Tier 1 capital to average assets Tier One Leverage Capital Required to be Well Capitalized to Average Assets Income Tax Disclosure [Abstract] Income Taxes Income Tax Disclosure [Text Block] Leases [Abstract] Leases Lessee, Operating Leases [Text Block] Statement of Stockholders' Equity [Abstract] Common stock (in usd per share) Common Stock, Dividends, Per Share, Declared Investments, Debt and Equity Securities [Abstract] Schedule of Available-for-sale Securities [Table] Schedule of Available-for-sale Securities [Table] U.S. Treasury securities US Treasury Securities [Member] Mortgage-backed securities Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] Collateralized mortgage obligations Collateralized Mortgage Obligations [Member] Debt securities US Government Agencies Debt Securities [Member] Total U.S. government agency and sponsored agency obligations US Government Agencies Debt Securities and US Government-sponsored Enterprises Debt Securities [Member] [Member] US Government Agencies Debt Securities and US Government-sponsored Enterprises Debt Securities [Member] [Member] Municipal bonds-tax exempt Nontaxable Municipal Bonds [Member] Debt Securities, Available-for-sale [Line Items] Debt Securities, Available-for-sale [Line Items] Amortized Cost Gross Unrealized Gain Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax Gross Unrealized Loss Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax Estimated Fair Value Home equity line of credit Home Equity Line of Credit [Member] Commercial property loan [Member] Commercial Property Loan [Member] Commercial property loan. Other Commercial Real Estate Other, Including Gas Stations [Member] Commercial Real Estate Other, Including Gas Stations [Member] Commercial term Commercial Term Loans [Member] Commercial term loans. Commercial lines of credit Commercial Lines Of Credit [Member] Commercial lines of credit. International loans International Loans [Member] International loans. Total gross loans and leases receivable Loans and Leases Receivable, Gross Allowance for loan and lease losses Loans and leases receivable, net Loans and Leases Receivable, Net Amount Securities Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] Assets and Liabilities Measured at Fair Value on Recurring Basis Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Assets and Liabilities Measured at Fair Value on Non-Recurring Basis Fair Value Measurements, Nonrecurring [Table Text Block] Estimated Fair Values of Financial Instruments Fair Value, by Balance Sheet Grouping [Table Text Block] 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] ASU 2016-01 Accounting Standards Update 2016-01 [Member] Impairment charges on securities in continuous unrealized loss position for 12 months or longer Other-than-temporary Impairment Loss, Debt Securities, Available-for-sale Net gain (loss) in earnings resulting from sale of securities Equity Securities, FV-NI, Realized Gain (Loss) Net unrealized gains (losses) recorded in comprehensive income Other Comprehensive Income (Loss), Securities, Available-for-sale, Adjustment, before Reclassification Adjustments, after Tax Gross realized gains included in earnings Equity Securities, FV-NI, Realized Gain Reduction in securities available for sale Reduction to retained earnings Retained Earnings (Accumulated Deficit) Increase in net deferred tax asset Deferred Tax Assets, Net of Valuation Allowance Gross realized losses included in earnings Equity Securities, FV-NI, Realized Loss Available for sale securities pledged as collateral Pledged Financial Instruments, Not Separately Reported, Mortgage-Related Securities Available-for-sale or Held-for-investment Distribution of Undisbursed Loan Commitments Other Commitments [Table Text Block] Allowance For Loan Losses And Allowance For Off Balance Sheet Items Allowance For Loan Losses And Allowance For Off Balance Sheet Items [Table Text Block] Allowance For Loan Losses And Allowance For Off Balance Sheet Items [Table Text Block] Share-based Payment Arrangement [Abstract] Unrecognized Share-Based Compensation Expense Share-based Payment Arrangement, Nonvested Award, Cost [Table Text Block] Summary of Stock Options Outstanding under Plans Share-based Payment Arrangement, Option, Exercise Price Range [Table Text Block] Schedule of Restricted Stock Awards Share-based Payment Arrangement, Restricted Stock Unit, Activity [Table Text Block] 2019 Lessee, Operating Lease, Liability, Payments, Remainder of Fiscal Year 2020 Lessee, Operating Lease, Liability, Payments, Due Year Two 2021 Lessee, Operating Lease, Liability, Payments, Due Year Three 2022 Lessee, Operating Lease, Liability, Payments, Due Year Four 2023 Lessee, Operating Lease, Liability, Payments, Due Year Five Thereafter Lessee, Operating Lease, Liability, Payments, Due after Year Five Total lease liabilities due Lessee, Operating Lease, Liability, Payments, Due Interest Lessee, Operating Lease, Liability, Undiscounted Excess Amount Present value of lease liability Operating Lease, Liability Operating lease cost Operating Lease, Cost Sublease income Sublease Income Net lease cost Lease, Cost Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] Number of Shares, Options outstanding at beginning of period (shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Number of shares, Stock options exercised (shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Number of Shares, Options outstanding at end of period (shares) Number of Shares, Options exercisable at end of period (shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract] Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract] Weighted-Average Exercise Price Per Share, Options outstanding at beginning of period (in usd per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price Weighted-Average Exercise Price Per Share, Options exercised (in usd per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Weighted-Average Exercise Price Per Share, Options outstanding at end of period (in usd per share) Weighted-Average Exercise Price Per Share, Options exercisable at end of period (in usd per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term [Abstract] Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term [Roll Forward] Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term [Abstract] Weighted-Average Remaining Contractual Life, Options outstanding at beginning of period Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Weighted-Average Remaining Contractual Life, Options exercised Share Based Compensation Arrangement By Share Based Payment Award Options Exercise In Period Weighted Average Remaining Contractual Term Share Based Compensation Arrangement By Share Based Payment Award Options Exercise In Period Weighted Average Remaining Contractual Term Weighted-Average Remaining Contractual Life, Options outstanding at end of period Weighted-Average Remaining Contractual Life, Options exercisable at end of period Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term Aggregate Intrinsic Value of In-the-Money Options, Options outstanding at beginning of period Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value Aggregate Intrinsic Value of In-the-Money Options, Options exercised Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value Aggregate Intrinsic Value of In-the-Money Options, Options outstanding at end of period Aggregate Intrinsic Value of In-the-Money Options, Options exercisable at end of period Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value Intrinsic value represents the excess of the closing stock price related to options outstanding (in usd per share) Closing Price Of Common Stock The excess of the closing stock price on the last day of the trading period over the exercise price. Equity [Abstract] Activity in Accumulated Other Comprehensive Income Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Financing Receivable, Allowance for Credit Loss [Table] Financing Receivable, Allowance for Credit Loss [Table] SEC Schedule, 12-09, Valuation Allowances and Reserves Type [Axis] SEC Schedule, 12-09, Valuation Allowances and Reserves Type [Axis] SEC Schedule, 12-09, Valuation Allowances and Reserves [Domain] SEC Schedule, 12-09, Valuation Allowances and Reserves [Domain] Allowance for loan and lease losses SEC Schedule, 12-09, Allowance, Loan and Lease Loss [Member] Financing Receivable, Allowance for Credit Loss [Line Items] Financing Receivable, Allowance for Credit Loss [Line Items] Allowance for loan losses: Allowance for Loan and Lease Losses [Roll Forward] Balance at beginning of period Loans and leases charged off Allowance for Loan and Lease Losses, Write-offs Recoveries on loans and leases previously charged off Allowance for Loan and Lease Loss, Recovery of Bad Debts Net (charge-offs) recoveries Allowance for Loan and Lease Losses Write-offs, Net Loan and lease loss provision Provision (Negative Provision) For Loan, Lease, And Other Losses Provision (Negative Provision) For Loan, Lease, And Other Losses Balance at end of period Subsequent Events [Abstract] Subsequent Events Subsequent Events [Text Block] Earnings Per Share [Abstract] Basic EPS Earnings Per Share, Basic [Abstract] Net income Net Income (Loss) Attributable to Parent Less: income allocated to unvested restricted stock Undistributed Earnings (Loss) Allocated to Participating Securities, Basic Income allocated to common shares Net Income (Loss) Available to Common Stockholders, Basic Weighted-average shares for basic EPS (shares) Weighted Average Number of Shares Outstanding, Basic Basic earnings per share (in usd per share) Earnings Per Share, Basic Effect of dilutive securities - options and unvested restricted stock (shares) Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements Diluted EPS Earnings Per Share, Diluted [Abstract] Income allocated to common shares Undistributed Earnings (Loss) Available to Common Shareholders, Diluted Weighted-average shares for diluted EPS (shares) Weighted Average Number of Shares Outstanding, Diluted Diluted earnings per share (in usd per share) Earnings Per Share, Diluted Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Antidilutive Securities [Axis] Antidilutive Securities [Axis] Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] Stock option awards Share-based Payment Arrangement, Option [Member] Unvested restricted stock Restricted Stock [Member] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive securities excluded from computation of diluted EPS (shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Schedule of Operating Lease Assets and Lease Liabilities Assets And Liabilities, Lessee [Table Text Block] Assets And Liabilities, Lessee [Table Text Block] Schedule of Operating Lease Costs Lease, Cost [Table Text Block] Maturity Schedule of Operating Lease Liabilities Lessee, Operating Lease, Liability, Maturity [Table Text Block] Revenue from Contract with Customer [Abstract] Revenue Recognition Revenue from Contract with Customer [Text Block] Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income (Loss) [Table] 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 [Member] Reclassification out of Accumulated Other Comprehensive Income [Member] Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Unrealized Gains and Losses on Available for Sale Securities AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent [Member] Accumulated Other Comprehensive Income (Loss) AOCI Attributable to Parent [Member] Tax Benefit (Expense) Tax Expense Benefit [Member] Tax Expense Benefit [Member] Accumulated Other Comprehensive Income [Line Items] Accumulated Other Comprehensive Income (Loss) [Line Items] Net gain (loss) on sales of securities Debt and Equity Securities, Gain (Loss) Net unrealized gains (losses) recorded in comprehensive income Adjustment to accumulated other comprehensive income related to adoption of ASU 2016-01 and 2018-02, net of tax Adjustment to Accumulated Other Comprehensive Income, Net of Tax Adjustment to Accumulated Other Comprehensive Income, Net of Tax Reduction of unrealized losses related to securities Adjustment to Accumulated Other Comprehensive Income, Before Tax Adjustment to Accumulated Other Comprehensive Income, Before Tax Reduction in tax benefits upon adoption of ASUs Adjustment to Accumulated Other Comprehensive Income, Tax Adjustment to Accumulated Other Comprehensive Income, Tax Accumulated Other Comprehensive Income Comprehensive Income (Loss) Note [Text Block] Total right-of-use assets - Operating leases Operating Lease, Right-of-Use Asset Total lease liabilities - Operating leases Nonaccrual loans and leases Total nonperforming loans and leases Non Performing Loans Non-performing loans. Other real estate owned (“OREO”) Other Real Estate, Foreclosed Assets, and Repossessed Assets Total nonperforming assets Loans And Leases Receivable Non Performing Assets Loans and leases receivable non performing assets. Financing Receivable, Credit Quality Indicator [Table] Financing Receivable, Credit Quality Indicator [Table] Credit Loss Status [Axis] Credit Loss Status [Axis] Credit Loss Status [Domain] Credit Loss Status [Domain] Non-PCI Loans and Leases Non Purchased Credit Impaired Loans [Member] Non Purchased Credit Impaired Loans [Member] Internal Credit Assessment [Axis] Internal Credit Assessment [Axis] Internal Credit Assessment [Domain] Internal Credit Assessment [Domain] Pass/Pass-Watch Pass [Member] Special Mention Special Mention [Member] Classified Classified Grade [Member] Classified grade. Financing Receivable, Credit Quality Indicator [Line Items] Financing Receivable, Credit Quality Indicator [Line Items] Schedule of Impaired Financing Receivable [Table] Schedule of Impaired Financing Receivable [Table] Financing Receivable, Impaired [Line Items] Financing Receivable, Impaired [Line Items] Recorded Investment Impaired Financing Receivable, Recorded Investment Unpaid Principal Balance Impaired Financing Receivable, Unpaid Principal Balance With No Related Allowance Recorded Impaired Financing Receivable, with No Related Allowance, Recorded Investment With an Allowance Recorded Impaired Financing Receivable, with Related Allowance, Recorded Investment Related Allowance Impaired Financing Receivable, Related Allowance Average Recorded Investment Impaired Financing Receivable Average Recorded Value Of Investment Impaired Financing Receivable Average Recorded Value Of Investment Interest Income Recognized Impaired Financing Receivable Interest Income Recognized Impaired Financing Receivable Interest Income Recognized Financing Receivable, Troubled Debt Restructuring [Table] Financing Receivable, Troubled Debt Restructuring [Table] Financing Receivable, Troubled Debt Restructuring [Line Items] Financing Receivable, Troubled Debt Restructuring [Line Items] Non-Accrual TDRs, Deferral of Principal Non Accrual Tdrs Deferral Of Principal Non- accrual TDRs deferral of principal. Non-Accrual TDRs, Deferral of Principal and Interest Non Accrual Tdrs Deferral Of Principal And Interest Non- accrual TDRs deferral of principal and Interest. Non-Accrual TDRs, Reduction of Principal and Interest Non Accrual Tdrs Reduction Of Principal And Interest Non-accrual TDRs reduction of principal and interest. Non-Accrual TDRs, Extension of Maturity Non Accrual Tdrs Extension Of Maturity Non-accrual TDRs extension of maturity. Non-Accrual TDRs, Total Non Accrual Tdrs Non-accrual TDRs. Accrual TDRs, Deferral of Principal Accrual Tdrs Deferral Of Principal Accrual TDRs deferral of principal. Accrual Tdrs Deferral Of Principal and Interest Accrual Tdrs Deferral Of Principal And Interest Accrual TDRs deferral of principal and interest. Accrual TDRs, Reduction of Principal and Interest Accrual Tdrs Reduction Of Principal And Interest Accrual TDRs reduction of principal and interest. Accrual TDRs, Extension of Maturity Accrual Tdrs Extension Of Maturity Accrual TDRs extension of maturity. Accrual TDRs Accrual Tdrs Accrual TDRs. Available-for-Sale Within one year, Amortized Cost Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, within One Year, Amortized Cost Available-for-Sale Over one year through five years, Amortized Cost Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after One Through Five Years, Amortized Cost Available-for-Sale Over five years through ten years, Amortized Cost Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after Five Through Ten Years, Amortized Cost Available-for-Sale Over ten years, Amortized Cost Debt Securities, Available-for-sale, Allocated and Single Maturity Date, Maturity, after 10 Years, Amortized Cost Available-for-Sale Within one year, Estimated Fair Value Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, within One Year, Fair Value Available-for-Sale Over one year through five years, Estimated Fair Value Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after One Through Five Years, Fair Value Available-for-Sale Over five years through ten years, Estimated Fair Value Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after Five Through Ten Years, Fair Value Available-for-Sale Over ten years, Estimated Fair Value Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after 10 Years, Fair Value Estimated fair value Loans Receivable Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] Loans Receivable to Loans Held for Sale Purchases Sales And Reclassification Of Loans Receivable To Loans Held For Sale By Portfolio Segment Table [Table Text Block] Purchases, sales and reclassification of loans receivable to loans held for sale by portfolio segment. Allowance for Non-PCI Losses and Allowance for Off-Balance Sheet Items Allowance for Loan Losses by Portfolio Segment Financing Receivable, Allowance for Credit Loss [Table Text Block] Credit Quality of Loan Portfolio Financing Receivable Credit Quality Indicators [Table Text Block] Analysis of Past Due Loans, Disaggregated by Loan Class Financing Receivable, Past Due [Table Text Block] Information on Impaired Loans, Disaggregated by Loan Class Impaired Financing Receivables [Table Text Block] Summary of Interest Foregone on Impaired Loans Summary Of Interest Foregone On Impaired Loans Table [Table Text Block] Summary of interest foregone on impaired loans. Non-Accrual Loans, Disaggregated by Loan Class Financing Receivable, Nonaccrual [Table Text Block] Non-Performing Assets Schedule Of Non Performing Assets Table [Table Text Block] Schedule of non performing assets. Troubled Debt Restructurings, Disaggregated by Type of Concession and by Loan Type Troubled Debt Restructurings On Financing Receivables Type Of Concession And Loans Table [Table Text Block] Tabular disclosure of total recorded investment of troubled debt restructurings by disaggregated types of concessions made and loan type. Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Award Type [Axis] Award Type [Axis] Award Type [Domain] Award Type [Domain] Restricted stock awards Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Unrecognized Expense Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount Average Expected Recognition Period Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition Fair Value, Recurring and Nonrecurring [Table] Fair Value, Recurring and Nonrecurring [Table] Measurement Frequency [Axis] Measurement Frequency [Axis] Measurement Frequency [Domain] Measurement Frequency [Domain] Non-recurring Basis Fair Value, Nonrecurring [Member] Asset Class [Axis] Asset Class [Axis] Asset Class [Domain] Asset Class [Domain] Impaired loans Impaired Loans [Member] Impaired loans. Real estate loans Real Estate Loans [Member] Real estate loans. 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] Impaired loans Impaired Loans Fair Value Disclosure Impaired Loans fair value disclosure. Other real estate owned Other Real Estate Owned Fair Value Disclosure Other Real Estate Owned Fair Value Disclosure. Unrealized losses impaired loans Unrealized Gain (Loss) On Impaired Loans Held For Sale Unrealized Gain (Loss) On Impaired Loans Held For Sale Unrealized losses other real estate owned Unrealized Gains Losses On Other Real Estate Owned Unrealized Gains Losses On Other Real Estate Owned Lessee, Lease, Description [Table] Lessee, Lease, Description [Table] ASU 2016-02 Accounting Standards Update 2016-02 [Member] Statistical Measurement [Axis] Statistical Measurement [Axis] Statistical Measurement [Domain] Statistical Measurement [Domain] Minimum Minimum [Member] Maximum Maximum [Member] Lessee, Lease, Description [Line Items] Lessee, Lease, Description [Line Items] Number of leases Lessee, Operating Lease, Number of Leases Lessee, Operating Lease, Number of Leases Initial lease terms Lessee, Operating Lease, Term of Contract Lease renewal term Lessee, Operating Lease, Renewal Term Right-of-use assets Weighted average remaining lease term Operating Lease, Weighted Average Remaining Lease Term Weighted average discount rate (percent) Operating Lease, Weighted Average Discount Rate, Percent Net lease expense Operating Lease, Expense Cash paid for amounts included in the measurement of Company's operating lease liabilities Operating Lease, Payments Schedule of Earnings Per Share, Basic and Diluted Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Summary of Investment Holdings [Table] Summary of Investment Holdings [Table] Collateralized mortgage obligations Collateralized Mortgage Backed Securities [Member] Collateralized mortgage backed securities. Summary of Investment Holdings [Line Items] Summary of Investment Holdings [Line Items] Available-for-Sale Within One Year, Gross Unrealized Loss Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss Available-for-Sale Within One Year, Estimated Fair Value Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months Available-for-Sale Within One Year, Number of Securities Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions Available-for-Sale More than One Year, Gross Unrealized Loss Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss Available-for-Sale More than One Year, Estimated Fair Value Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer Available-for-Sale More than One Year, Number of Securities Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions Available-for-Sale, Gross Unrealized Loss Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss Available-for-Sale, Estimated Fair Value Debt Securities, Available-for-sale, Unrealized Loss Position Available-for-Sale, Number of Securities Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions Income Statement [Abstract] Interest and dividend income: Interest and Dividend Income, Operating [Abstract] Interest and fees on loans and leases Interest and Fee Income, Loans and Leases Interest on securities Interest Income, Securities, Operating, Taxable Dividends on FHLB stock Dividends On Federal Reserve Bank And Federal Home Loan Bank Stock Dividends On Federal Reserve Bank And Federal Home Loan Bank Stock Interest on deposits in other banks Interest Income, Deposits with Financial Institutions Total interest and dividend income Interest and Dividend Income, Operating Interest expense: Interest Expense [Abstract] Interest on deposits Interest Expense, Deposits Interest on borrowings Interest Expense, Federal Home Loan Bank and Federal Reserve Bank Advances, Short-term Interest on subordinated debentures Interest Expense, Subordinated Notes and Debentures Total interest expense Interest Expense Net interest income before provision for loan and lease losses Interest Income (Expense), Net Net interest income after provision for loan and lease losses Interest Income (Expense), after Provision for Loan Loss Noninterest income: Noninterest Income [Abstract] Service charges on deposit accounts Fees and Commissions, Depositor Accounts1 Fees and Commissions, Depositor Accounts1 Trade finance and other service charges and fees Remittance Fees Remittance fees. Gain on sales of Small Business Administration (“SBA”) loans Gain (Loss) on Sales of Loans, Net Other operating income Noninterest Income, Other Operating Income Total noninterest income Noninterest Income Noninterest expense: Noninterest Expense [Abstract] Salaries and employee benefits Labor and Related Expense Occupancy and equipment Occupancy, Net Data processing Information Technology and Data Processing Professional fees Professional Fees Supplies and communications Supplies and Postage Expense Advertising and promotion Marketing and Advertising Expense Other operating expenses Other Noninterest Expense Total noninterest expense Noninterest Expense Income before income tax expense Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Income tax expense Income Tax Expense (Benefit) Net income Weighted-average shares outstanding: Weighted Average Number of Shares Outstanding, Diluted [Abstract] Basic (shares) Diluted (shares) Financing Receivable Portfolio Segment [Axis] Financing Receivable Portfolio Segment [Axis] Financing Receivable Portfolio Segment [Domain] Financing Receivable Portfolio Segment [Domain] Real Estate Real Estate Portfolio Segment [Member] Real Estate Portfolio Segment [Member] Commercial and Industrial Commercial And Industrial Portfolio Segment [Member] Commercial And Industrial Portfolio Segment [Member] Consumer Consumer Portfolio Segment [Member] Unallocated Unallocated Financing Receivables [Member] Less loans and leases charged off Ending balance: individually evaluated for impairment Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment Ending balance: collectively evaluated for impairment Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment Loans receivable: Loans Receivable [Abstract] Loans receivable. Total loans and leases receivable Individually evaluated for impairment Financing Receivable, Individually Evaluated for Impairment Collectively evaluated for impairment Financing Receivable, Collectively Evaluated for Impairment Statement [Table] Statement [Table] ASU 2018-02 Accounting Standards Update 2018-02 [Member] Common Stock - Number of Shares, Shares Issued Common Stock [Member] Common Stock - Number of Shares, Treasury Shares Treasury Stock [Member] Additional Paid-in Capital Additional Paid-in Capital [Member] Retained Earnings Retained Earnings [Member] Statement [Line Items] Statement [Line Items] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Balance at beginning of period Stockholders' Equity Attributable to Parent Beginning balance, shares issued (shares) Shares, Issued Beginning balance, treasury stock (shares) Beginning balance, shares outstanding (shares) Shares, Outstanding Adjustments related to adoption of new accounting standards: Cumulative Effect of New Accounting Principle in Period of Adoption Adjusted balance at January 1, 2018 Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Adjusted Balance Stock options exercised Stock Issued During Period, Value, Stock Options Exercised Stock options exercised (shares) Restricted stock awards, net of forfeitures Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures Restricted stock awards, net of forfeitures (shares) Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures Restricted stock awards, net of forfeitures Stock Issued During Period, Value, Restricted Stock Award, Forfeitures Restricted stock awards, net of forfeitures (shares) Stock Issued During Period, Shares, Restricted Stock Award, Forfeited Share-based compensation expense APIC, Share-based Payment Arrangement, Increase for Cost Recognition Restricted stock surrendered due to employee tax liability Share-based Payment Arrangement, Decrease for Tax Withholding Obligation Restricted stock surrendered due to employee tax liability (shares) Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation Cash dividends declared: Common stock Dividends, Common Stock, Cash Net income Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Change in unrealized gain (loss) on securities available for sale, net of income taxes Other Comprehensive Income (Loss), Securities, Available-for-sale, Adjustment, after Tax Balance at end of period Ending balance, shares issued (shares) Ending balance, treasury stock (shares) Ending balance, shares outstanding (shares) Financing Receivable, Reclassification From Portfolio Loans To Loans Held For Sale [Roll Forward] Financing Receivable, Reclassification From Portfolio Loans To Loans Held For Sale [Roll Forward] Financing Receivable, Reclassification From Portfolio Loans To Loans Held For Sale [Roll Forward] Balance at beginning of period Loans Receivable Held-for-sale, Net, Not Part of Disposal Group Originations Payments for Origination of Mortgage Loans Held-for-sale Sales Proceeds from Sale of Loans Held-for-sale Principal paydowns and amortization Principal Payoffs And Amortization Principal payoffs and amortization. Balance at end of period Transfers and Servicing [Abstract] Servicing Asset [Abstract] Servicing Asset [Abstract] Servicing assets: Servicing Asset at Fair Value, Amount [Roll Forward] Balance at beginning of period Servicing Asset at Fair Value, Amount Addition related to sale of SBA loans Servicing Asset at Fair Value, Disposals Amortization Servicing Asset at Amortized Cost, Amortization Balance at end of period Servicing Liability [Abstract] Servicing Liability [Abstract] Servicing liabilities: Servicing Liability at Fair Value, Amount [Roll Forward] Balance at beginning of period Servicing Liability at Fair Value, Amount Amortization Servicing Liability at Amortized Cost, Amortization Balance at end of period Serviced loans sold to unaffiliated parties Serviced Loans Sold To Unaffiliated Parties Serviced loans sold to unaffiliated parties. Servicing fee income Contractually Specified Servicing Fees, Amount Net amortization expense Serivicing Assets And Servicing Liabilities, Net Amortization Expense Serivicing Assets And Servicing Liabilities, Net Amortization Expense Regulatory Matters Regulatory Capital Requirements under Banking Regulations [Text Block] Loans and Leases Loans, Notes, Trade and Other Receivables Disclosure [Text Block] Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Number of Shares, Restricted stock at beginning of period (shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Number of Shares, Restricted stock granted (shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Number of Shares, Restricted stock vested (shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Number of Shares, Restricted stock forfeited (shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Number of Shares, Restricted stock at end of period (shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Weighted-Average Grant Date Fair Value Per Share, Restricted stock 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 Weighted-Average Grant Date Fair Value Per Share, Restricted stock granted (in usd per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Weighted-Average Grant Date Fair Value Per Share, Restricted stock 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 Weighted-Average Grant Date Fair Value Per Share, Restricted stock 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 Weighted-Average Grant Date Fair Value Per Share, Restricted stock at end of period (in usd per share) Share-based Payment Arrangement, Expensed and Capitalized, Amount [Table] Share-based Payment Arrangement, Expensed and Capitalized, Amount [Table] Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] Share-based compensation expense Share-based Payment Arrangement, Expense Related tax benefits on non-qualified stock options Share-based Payment Arrangement, Expense, Tax Benefit Unrecognized share-based compensation expense Number of shares, stock options exercised (shares) Share-Based Compensation Share-based Payment Arrangement [Text Block] Changes in Servicing Assets Schedule of Servicing Assets at Fair Value [Table Text Block] Change in Servicing Liabilities Schedule of Servicing Liabilities at Fair Value [Table Text Block] Statement of Cash Flows [Abstract] Cash flows from operating activities: Net Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to reconcile net income to net cash provided by operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Depreciation and amortization Depreciation, Nonproduction Share-based compensation expense Share-based Payment Arrangement, Noncash Expense (Gain) loss on sales of securities Gain on sales of SBA loans Gain (Loss) on Sale of Loans and Leases Loss (gain) on disposition of fixed assets Gain (Loss) on Disposition of Property Plant Equipment Origination of SBA loans held for sale Payments for Origination and Purchases of Loans Held-for-sale Proceeds from sales of SBA loans Proceeds From Sale Of Small Business Administration Loans Proceeds From Sale Of Small Business Administration Loans Change in accrued interest receivable Increase (Decrease) in Accrued Interest Receivable, Net Change in bank-owned life insurance Life Insurance, Corporate or Bank Owned, Change in Value Change in prepaid expenses and other assets Increase (Decrease) in Prepaid Expense and Other Assets Change in accrued interest payable Increase (Decrease) in Interest Payable, Net Change in accrued expenses and other liabilities Increase (Decrease) in Accrued Liabilities and Other Operating Liabilities 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] Proceeds from matured, called and repayment of securities Proceeds from Maturities, Prepayments and Calls of Debt Securities, Available-for-sale Proceeds from sales of securities available for sale Proceeds from Sale of Debt Securities, Available-for-sale Proceeds from sales of other real estate owned (“OREO”) Proceeds from Sale of Other Real Estate Proceeds from disposition of fixed assets Proceeds from Sale of Property, Plant, and Equipment Change in loans and leases receivable, excluding purchases Proceeds from Sale of Loans and Leases Held-for-investment Change in loans and leases receivable, excluding purchases Payments to Acquire Loans and Leases Held-for-investment Purchases of securities available for sale Payments to Acquire Debt Securities, Available-for-sale Purchases of premises and equipment Payments to Acquire Productive Assets Purchases of loans and leases receivable Payments to Acquire Receivables 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] Change in deposits Increase (Decrease) in Deposits Change in borrowings Increase (Decrease) in Loans to Federal Home Loan Banks Proceeds from exercise of stock options Proceeds from Stock Options Exercised Cash paid for surrender of vested shares due to employee tax liability Payment, Tax Withholding, Share-based Payment Arrangement Cash dividends paid Payments of Dividends Net cash (used in) provided by financing activities Net Cash Provided by (Used in) Financing Activities Net decrease in cash and cash equivalents Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Cash and cash equivalents at beginning of year Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Cash and cash equivalents at end of period Supplemental disclosures of cash flow information: Supplemental Cash Flow Information [Abstract] Interest expense paid Interest Paid, Excluding Capitalized Interest, Operating Activities Non-cash activities: Other Noncash Investing and Financing Items [Abstract] Change in income taxes Income Taxes Paid, Net Transfer of loans receivable to other real estate owned Real Estate Owned, Transfer to Real Estate Owned Income tax (expense) benefit related to items in other comprehensive income Other Comprehensive Income (Loss), Tax Change in unrealized (gain) loss in accumulated other comprehensive income Other Comprehensive Income (Loss), before Tax Right-of-use asset obtained in exchange for lease liability Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Recurring Basis Fair Value, Recurring [Member] Summary of Investment Securities Available for Sale Debt Securities, Available-for-sale [Table Text Block] Schedule of Amortized Cost and Estimated Fair Value of Investment Securities by Contractual Maturity Investments Classified by Contractual Maturity Date [Table Text Block] Available for Sale Securities, Continuous Unrealized Loss Position, Fair Value Debt Securities, Available-for-sale, Unrealized Loss Position, Fair Value [Table Text Block] Realized Gains and Losses on Sales of Investment Securities Realized Gain (Loss) on Investments [Table Text Block] Servicing Assets and Liabilities Transfers and Servicing of Financial Assets [Text Block] Loss Contingencies [Table] Loss Contingencies [Table] Loss Contingency Nature [Axis] Loss Contingency Nature [Axis] Loss Contingency, Nature [Domain] Loss Contingency, Nature [Domain] Commitments to extend credit Commitments to Extend Credit [Member] Standby letters of credit Standby Letters of Credit [Member] Commercial letters of credit Commercial Letters Of Credit [Member] Commercial letters of credit. Allowance for off-balance sheet items SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] Loss Contingencies [Line Items] Loss Contingencies [Line Items] Total undisbursed loan commitments Undisbursed Loan Commitments Undisbursed loan commitments. Allowance for Loan Off-Balance Sheet Items [Roll Forward] SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] Provision (income) New Accounting Pronouncements or Change in Accounting Principle [Table] New Accounting Pronouncements or Change in Accounting Principle [Table] New Accounting Pronouncements or Change in Accounting Principle [Line Items] New Accounting Pronouncements or Change in Accounting Principle [Line Items] Provision (benefit) for income taxes for continuing operations Effective income tax rate Effective Income Tax Rate Reconciliation, Percent Valuation allowance Deferred Tax Assets, Valuation Allowance Net deferred tax asset Net current tax asset Deferred Tax Assets, Net of Valuation Allowance, Current Impact on retained earnings of adopting recent accounting pronouncement Tax Cuts and Jobs Act, Reclassification from AOCI to Retained Earnings, Tax Effect Amount of increase (decrease) in accumulated other comprehensive income (AOCI) for reclassification to retained earnings of tax effect from remeasurement of deferred tax pursuant to Tax Cuts and Jobs Act. Provision expense Effective Income Tax Rate Reconciliation, Tax Contingency, Amount Tax settlement paid to the Franchise Tax Board Unrecognized Tax Benefits, Increase Resulting from Settlements with Taxing Authorities Capital Ratios of Hanmi Financial and Bank Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations [Table Text Block] Debt Disclosure [Abstract] Borrowings and Subordinated Debentures Debt Disclosure [Text Block] Gross realized gains on sales of securities Debt Securities, Available-for-sale, Realized Gain Gross realized losses on sales of securities Debt Securities, Available-for-sale, Realized Loss, Excluding Other-than-temporary Impairment Net realized gains (losses) on sales of securities Debt Securities, Available-for-sale, Realized Gain (Loss), Excluding Other-than-temporary Impairment Proceeds from sales of securities Proceeds from Sale and Maturity of Debt Securities, Available-for-sale Financial Asset, Period Past Due [Axis] Financial Asset, Period Past Due [Axis] Financial Asset, Period Past Due [Domain] Financial Asset, Period Past Due [Domain] 30-59 Days Past Due Financial Asset, 30 to 59 Days Past Due [Member] 60-89 Days Past Due Financial Asset, 60 to 89 Days Past Due [Member] 90 Days or More Past Due Financial Asset, Equal to or Greater than 90 Days Past Due [Member] Retail Commercial Real Estate Retails [Member] Commercial Real Estate Retails [Member] Other Commercial Real Estate Others [Member] Commercial Real Estate Others [Member] Past due loans and leases receivable Financing Receivable, Past Due Current Financing Receivable, Not Past Due Cover page. Document Type Document Type Document Quarterly Report Document Quarterly Report Current Fiscal Year End Date Current Fiscal Year 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 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 Amendment Flag Amendment Flag Document Period End Date Document Period End Date Document Fiscal Year focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Entity Central Index Key Entity Central Index Key Statement of Comprehensive Income [Abstract] Other comprehensive income (loss), net of tax: Other Comprehensive Income (Loss), Net of Tax [Abstract] Unrealized gain (loss) on securities: Other Comprehensive Income (Loss), Securities, Available-for-sale, Adjustment, after Tax [Abstract] Unrealized holding gain (loss) arising during period Other Comprehensive Income (Loss), Securities, Available-for-Sale, Unrealized Holding Gain (Loss) Arising During Period, before Tax Less: reclassification adjustment for net gain included in net income Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, before Tax Income tax (expense) benefit related to items of other comprehensive income Other comprehensive income (loss), net of tax Other Comprehensive Income (Loss), Net of Tax Comprehensive income Comprehensive Income (Loss), Net of Tax, Attributable to Parent AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward] AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward] Balance at beginning of period AOCI before Tax, Attributable to Parent Other comprehensive income before reclassification, before tax OCI, before Reclassifications, before Tax, Attributable to Parent Reclassification from accumulated other comprehensive income, before tax Reclassification from AOCI, Current Period, before Tax, Attributable to Parent Adjustment to accumulated other comprehensive income related to adoption of ASU 2016-01 and 2018-02, before tax Period change, before tax Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent Balance at end of period Balance at beginning of period, tax AOCI Tax, Attributable to Parent Other comprehensive (loss) income before reclassification, tax Other Comprehensive Income (Loss) before Reclassifications, Tax Reclassification from accumulated other comprehensive income, tax Reclassification from AOCI, Current Period, Tax Adjustment to accumulated other comprehensive income related to adoption of ASU 2016-01 and 2018-02, tax Period change, tax Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent Balance at end of period, tax Other comprehensive income before reclassification, net of tax OCI, before Reclassifications, Net of Tax, Attributable to Parent Reclassification from accumulated other comprehensive income Reclassification from AOCI, Current Period, Net of Tax, Attributable to Parent Adjustment to accumulated other comprehensive income related to adoption of ASU 2016-01 and 2018-02, net of tax Organization, Consolidation and Presentation of Financial Statements [Abstract] Basis of Accounting Basis of Accounting, Policy [Policy Text Block] Use of Estimates Use of Estimates, Policy [Policy Text Block] Recent Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Fair Value Assumptions of Financial Instruments Fair Value of Financial Instruments, Policy [Policy Text Block] Fair Value Measurements Fair Value Measurement, Policy [Policy Text Block] Organization and Basis of Presentation Basis of Accounting [Text Block] Earnings Per Share Earnings Per Share [Text Block] Number of impaired loans Number of Impaired Loans Number of Impaired Loans Fair value of impaired loans Unpaid principal balance of Non-accrual Non-PCI loans reviewed individually for amount of impairment Impaired Financing Receivable Unpaid Principal Balance Collectively Evaluated For Impairment Impaired Financing Receivable Unpaid Principal Balance Collectively Evaluated For Impairment Unpaid principal balance of Non-accrual Non-PCI loans reviewed collectively for amount of impairment Impaired Financing Receivable Unpaid Principal Balance Individually Evaluated For Impairment Impaired Financing Receivable Unpaid Principal Balance Individually Evaluated For Impairment Interest income that would have been recognized had impaired loans performed in accordance with their original terms Loans and Leases Receivable, Impaired, Troubled Debt, Interest Income Less: Interest income recognized on impaired loans Impaired Financing Receivable, Interest Income, Accrual Method Interest foregone on impaired loans Loans and Leases Receivable, Impaired, Interest Lost on Nonaccrual Loans Assets Assets [Abstract] Securities available for sale, at fair value (amortized cost of $636,657 as of June 30, 2019 and $583,444 as of December 31, 2018) Loans held for sale, at the lower of cost or fair value Loans and leases receivable, net of allowance for loan and lease losses of $49,386 as of June 30, 2019 and $31,974 as of December 31, 2018 Premises and equipment, net Property, Plant and Equipment, Net Customers’ liability on acceptances Due from Customer Acceptances Servicing assets Goodwill and other intangible assets, net Finite-Lived Intangible Assets, Net Federal Home Loan Bank (“FHLB”) stock, at cost Federal Home Loan Bank Stock Bank-owned life insurance Bank Owned Life Insurance Prepaid expenses and other assets Prepaid Expense and Other Assets Total assets Assets Liabilities and stockholders’ equity Liabilities and Equity [Abstract] Liabilities: Liabilities [Abstract] Deposits: Deposits [Abstract] Noninterest-bearing Interest-bearing Total deposits Deposits Bank’s liability on acceptances Bank Acceptances Executed and Outstanding Borrowings Advances from Federal Home Loan Banks Subordinated debentures Junior Subordinated Debenture Owed to Unconsolidated Subsidiary Trust Accrued expenses and other liabilities Other Liabilities Total liabilities Liabilities Stockholders’ equity: Stockholders' Equity Attributable to Parent [Abstract] Preferred Stock, $0.001 par value; authorized 10,000,000 shares; no shares issued as of June 30, 2019 and December 31, 2018 Preferred Stock, Value, Issued Common stock, $0.001 par value; authorized 62,500,000 shares; issued 33,271,832 shares (30,975,163 shares outstanding) as of June 30, 2019 and issued 33,202,369 shares (30,928,437 shares outstanding) as of December 31, 2018 Common Stock, Value, Issued Additional paid-in capital Additional Paid in Capital, Common Stock Accumulated other comprehensive Income (loss), net of tax expense of $961 as of June 30, 2019 and benefit of $2,457 as of December 31, 2018 Accumulated Other Comprehensive Income (Loss), Net of Tax Retained earnings Less: treasury stock, at cost; 2,296,669 shares as of June 30, 2019 and 2,273,932 shares as of December 31, 2018 Treasury Stock, Value Total stockholders’ equity Total liabilities and stockholders’ equity Liabilities and Equity Fair Value Measurements Fair Value Disclosures [Text Block] Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Business Acquisition [Axis] Business Acquisition [Axis] Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] Central Bancorp, Inc Central Bancorp Inc [Member] Central Bancorp Inc. [Member] Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] Subordinated Debentures Subordinated Debt [Member] Variable Rate [Axis] Variable Rate [Axis] Variable Rate [Domain] Variable Rate [Domain] 3-month London Interbank Offered Rate (LIBOR) Three-Month London Interbank Offered Rate (LIBOR) [Member] Three-Month London Interbank Offered Rate (LIBOR) [Member] Debt Instrument [Line Items] Debt Instrument [Line Items] Weighted-average interest rate Federal Home Loan Bank, Advances, Activity for Year, Average Interest Rate for Year Loans pledged as collateral Financing Receivable, after Allowance for Credit Loss Borrowing capacity Borrowing Capacity Based On Pledged Collateral Borrowing capacity based on pledged collateral. Available borrowing capacity Borrowing Capacity Available Based On Pledged Collateral Borrowing capacity available based on pledged collateral. Loans pledged with FRB Carrying Value For Loans Pledged By Bank Carrying value for loans pledged by bank. Borrowing capacity through Fed Discount Window Amount Available From Borrowing Source Amount available from borrowing source. Outstanding borrowings Borrowing Borrowing. Subordinated debentures issued Debt Instrument, Face Amount Fixed interest rate Debt Instrument, Interest Rate, Stated Percentage Basis spread Debt Instrument, Basis Spread on Variable Rate Debt issue cost Debt Issuance Costs, Gross Debt outstanding, net of issuance cost Long-term Debt Amortization of debt issue costs Amortization of Debt Issuance Costs Unpaid principal balance Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Unpaid Principal Balance Of Long Term Debt Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Unpaid Principal Balance Of Long Term Debt Estimated fair value Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Long-term Debt Debt instrument discount Debt Instrument, Unamortized Discount Term for the initial fixed interest rate Debt Instrument, Initial Fixed Interest Rate, Term Debt Instrument, Initial Fixed Interest Rate, Term Optional interest payment deferral period (not to exceed) Debt Instrument, Optional Interest Payment Deferral Period Debt Instrument, Optional Interest Payment Deferral Period Amortization of discount on debentures Amortization of Debt Discount (Premium)