Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract] Accrued interest receivable Interest Receivable Net deferred tax asset Deferred Tax Assets, Net Investment in historic development entities Investment in Historic Development Entities Investment in Historic Development Entities Investment in a community development entity Investment in Community Development Entities Investment in Community Development Entities Investment in limited partnerships Investment in Limited Partnerships Investment in Limited Partnerships Investment in Trust II Investment in Trust II Investment in Trust II Fair value of interest rate swaps Interest Rate Derivative Assets, at Fair Value Prepaid expenses Prepaid Expense Other assets Other Assets, Miscellaneous Total accrued interest receivable and other assets Other Assets Derivative Instruments and Hedging Activities Disclosure [Abstract] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Balance Sheet Location Balance Sheet Location [Axis] Balance Sheet Location Balance Sheet Location [Domain] Accrued interest receivable and other assets Other Assets [Member] Accrued interest payable and other liabilities Other Liabilities [Member] Accumulated other comprehensive income Other Comprehensive Income Location [Domain] Derivatives not designated as hedging instruments, fair value Derivatives, Fair Value [Line Items] Description of location of interest rate derivative instruments not designated as hedging instruments on balance sheet Description of Location of Interest Rate Derivative Instruments Not Designated as Hedging Instruments on Balance Sheet Fair value of asset derivatives Interest Rate Derivative Instruments Not Designated as Hedging Instruments, Asset at Fair Value Fair value of liability derivatives Interest Rate Derivative Instruments Not Designated as Hedging Instruments, Liability at Fair Value Description of location of interest rate derivatives designated as hedging instruments on the balance sheet Description of Location of Interest Rate Cash Flow Hedge Derivative on Balance Sheet Effective portion of interest rate cash flow hedge, fair value included in accumulated other comprehensive income Effective portion of interest rate cash flow hedge, Fair Value included in accumulated other comprehensive income Effective portion of interest rate cash flow hedge, Fair Value included in accumulated other comprehensive income Interest Rate Cash Flow Hedge Liability at Fair Value Interest Rate Cash Flow Hedge Liability at Fair Value Broker-Dealer, Net Capital Requirement, SEC Regulation [Abstract] Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations [Table] Legal Entity Legal Entity [Axis] Entity Entity [Domain] First Business Bank First Business Bank [Member] First Business Bank [Member] Compliance with Regulatory Capital Requirements under Banking Regulations Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] Total capital Capital Total capital to risk-weighted assets Capital to Risk Weighted Assets Total capital, Minimum Required for Capital Adequacy Purposes Capital Required for Capital Adequacy Total capital to risk-weighted assets, Minimum Required for Capital Adequacy Purposes Capital Required for Capital Adequacy to Risk Weighted Assets Capital Required for Capital Adequacy Plus Capital Conservation Buffer Capital Required for Capital Adequacy Plus Capital Conservation Buffer Capital Required for Capital Adequacy Plus Capital Conservation Buffer Capital Required for Capital Adequacy Plus Conservation Buffer to Risk Weighted Assets Capital Required for Capital Adequacy Plus Conservation Buffer to Risk Weighted Assets Capital Required for Capital Adequacy Plus Conservation Buffer to Risk Weighted Assets Total capital, Minimum Required to be Well Capitalized Under Prompt Corrective Action Requirements Capital Required to be Well Capitalized Total capital to risk-weighted assets, Minimum Required to be Well Capitalized Under Prompt Corrective Action Requirements Capital Required to be Well Capitalized to Risk Weighted Assets Tier 1 capital Tier One Risk Based Capital Tier 1 capital to risk-weighted assets Tier One Risk Based Capital to Risk Weighted Assets Tier 1 capital, Minimum Required for Capital Adequacy Purposes Tier One Risk Based Capital Required for Capital Adequacy Tier 1 capital to risk-weighted assets, Minimum Required for Capital Adequacy Purposes Tier One Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets Tier One Risk Based Capital Required for Capital Adequacy Plus Capital Conservation Buffer Tier One Risk Based Capital Required for Capital Adequacy Plus Capital Conservation Buffer Tier One Risk Based Capital Required for Capital Adequacy Plus Capital Conservation Buffer Tier One Risk Based Capital Required for Capital Adequacy Plus Conservation Buffer to Risk Weighted Assets Tier One Risk Based Capital Required for Capital Adequacy Plus Conservation Buffer to Risk Weighted Assets Tier One Risk Based Capital Required for Capital Adequacy Plus Conservation Buffer to Risk Weighted Assets Tier 1 capital, Minimum Required to be Well Capitalized Under Prompt Corrective Action Requirements Tier One Risk Based Capital Required to be Well Capitalized Tier 1 capital to risk weighted assets, Minimum Required to be Well Capitalized Under Prompt Corrective Action Requirements Tier One Risk Based Capital Required to be Well Capitalized to Risk Weighted Assets Common equity tier 1 capital Common Equity Tier One Capital Common equity tier 1 capital to risk-weighted assets Common Equity Tier One Capital to Risk-Weighted Assets Common Equity Tier One Capital to Risk-Weighted Assets Common equity tier 1 capital, Minimum Required for Capital Adequacy Purposes Common Equity Tier One Capital Required for Capital Adequacy Common equity tier 1 capital to risk-weighted assets, Minimum Required for Capital Adequacy Purposes Common Equity Tier One Capital Required for Capital Adequacy to Risk-Weighted Assets Common Equity Tier One Capital Required for Capital Adequacy to Risk-Weighted Assets Common Equity Tier One Capital Required for Capital Adequacy Plus Capital Conservation Buffer Common Equity Tier One Capital Required for Capital Adequacy Plus Capital Conservation Buffer Common Equity Tier One Capital Required for Capital Adequacy Plus Capital Conservation Buffer Common Equity Tier One Capital Required for Capital Adequacy Plus Conservation Buffer to Risk Weighted Assets Common Equity Tier One Capital Required for Capital Adequacy Plus Conservation Buffer to Risk Weighted Assets Common Equity Tier One Capital Required for Capital Adequacy Plus Conservation Buffer to Risk Weighted Assets Common equity tier 1 capital, Minimum Required to Be Well Capitalized Under Prompt Corrective Action Requirements Common Equity Tier One Capital to be Well Capitalized Common Equity Tier One Capital to be Well Capitalized Common equity tier 1 capital to risk-weighted assets, Minimum Required to Be Well Capitalized Under Prompt Corrective Action Requirements Common Equity Tier One Capital Required to be Well Capitalized to Risk-Weighted Assets Common Equity Tier One Capital Required to be Well Capitalized to Risk-Weighted Assets Tier 1 leverage capital Tier One Leverage Capital Tier 1 leverage capital to average assets Tier One Leverage Capital to Average Assets Tier 1 leverage capital, Minimum Required for Capital Adequacy Purposes Tier One Leverage Capital Required for Capital Adequacy Tier 1 leverage capital to average assets, Minimum Required for Capital Adequacy Purposes Tier One Leverage Capital Required for Capital Adequacy to Average Assets Tier One Leverage Capital Required for Capital Adequacy Plus Capital Conservation Buffer Tier One Leverage Capital Required for Capital Adequacy Plus Capital Conservation Buffer Tier One Leverage Capital Required for Capital Adequacy Plus Capital Conservation Buffer Tier One Leverage Capital Required for Capital Adequacy Plus Conservation Buffer to Risk Weighted Assets Tier One Leverage Capital Required for Capital Adequacy Plus Conservation Buffer to Risk Weighted Assets Tier One Leverage Capital Required for Capital Adequacy Plus Conservation Buffer to Risk Weighted Assets Tier 1 leverage capital, Minimum Required to be Well Capitalized Under Prompt Corrective Action Requirements Tier One Leverage Capital Required to be Well Capitalized Tier 1 leverage capital to average assets, Minimum Required to be Well Capitalized Under Prompt Corrective Action Requirements Tier One Leverage Capital Required to be Well Capitalized to Average Assets Fair Value Disclosures [Abstract] Fair Value of Financial Instruments Fair Value of Financial Instruments, Policy [Policy Text Block] Fair Value Measurement Fair Value Measurement, Policy [Policy Text Block] Other Assets Other Assets Disclosure [Text Block] Debt Disclosure [Abstract] Line of credit commitment fee Line of Credit Facility, Commitment Fee Amount Leases [Abstract] Due 2020 Operating Leases, Future Minimum Payments Due, Next Twelve Months Due 2021 Lessee, Operating Lease, Liability, Payments, Due Year Two Due 2022 Lessee, Operating Lease, Liability, Payments, Due Year Three Due 2023 Lessee, Operating Lease, Liability, Payments, Due Year Four Due 2024 Lessee, Operating Lease, Liability, Payments, Due Year Five Due thereafter Lessee, Operating Lease, Liability, Payments, Due after Year Five Total undiscounted cash flows Lessee, Operating Lease, Liability, Payments, Due Discount on cash flows Discount on operating lease cash flows Discount on operating lease cash flows Total lease liability Operating Lease, Liability Statement of Financial Position [Abstract] Assets Assets [Abstract] Cash and due from banks Cash and Due from Banks Short-term investments Interest-bearing Deposits in Banks and Other Financial Institutions Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Securities available-for-sale, at fair value Debt Securities, Available-for-sale Securities held-to-maturity, at amortized cost Debt Securities, Held-to-maturity Loans held for sale Loans Receivable Held-for-sale, Amount Loans and leases receivable, net of allowance for loan and lease losses of $22,748 and $19,520, respectively Loans and Leases Receivable, Net Amount Premises and equipment, net Property, Plant and Equipment, Net Foreclosed properties Repossessed Assets Right-of-use assets Operating Lease, Right-of-Use Asset Bank-owned life insurance Bank Owned Life Insurance Federal Home Loan Bank stock, at cost Federal Home Loan Bank Stock Goodwill and other intangible assets Intangible Assets, Net (Including Goodwill) Accrued interest receivable and other assets Total assets Assets Liabilities and Stockholders’ Equity Liabilities and Equity [Abstract] Deposits Deposits Federal Home Loan Bank advances and other borrowings Federal Home Loan Bank and Other Borrowings Federal Home Loan Bank and other borrowings Junior subordinated notes Junior Subordinated Debenture Owed to Unconsolidated Subsidiary Trust Lease liabilities Accrued interest payable and other liabilities Other Liabilities Total liabilities Liabilities Stockholders’ equity: Stockholders' Equity Attributable to Parent [Abstract] Preferred stock, $0.01 par value, 2,500,000 shares authorized, none issued or outstanding Preferred Stock, Value, Issued Common stock, $0.01 par value, 25,000,000 shares authorized, 9,226,404 and 9,162,720 shares issued, 8,571,134 and 8,566,044 shares outstanding at March 31, 2020 and December 31, 2019, respectively Common Stock, Value, Issued Additional paid-in capital Additional Paid in Capital, Common Stock Retained earnings Retained Earnings (Accumulated Deficit) Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax Treasury stock, 655,270 and 596,676 shares at March 31, 2020 and December 31, 2019, respectively, at cost Treasury Stock, Value Total stockholders’ equity Stockholders' Equity Attributable to Parent Total liabilities and stockholders’ equity Liabilities and Equity Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Share-based Payment Arrangement [Abstract] Share-based compensation Share-based Payment Arrangement, Noncash Expense Investments, Debt and Equity Securities [Abstract] Debt Securities, Held-to-maturity Debt Securities, Held-to-maturity [Table] Counterparty Name Counterparty Name [Axis] Counterparty Name Counterparty Name [Domain] GNMA GNMA [Member] Debt securities issued by Government National Mortgage A (GNMA). Government Sponsored Enterprises Government Sponsored Enterprises [Member] Securities issued by government sponsored enterprises including, but not limited to FNMA, FHLMC, Freddie Mac. Financial Instrument Financial Instrument [Axis] Financial Instruments Financial Instruments [Domain] Municipal securities US States and Political Subdivisions Debt Securities [Member] Residential mortgage-backed securities Residential Mortgage Backed Securities [Member] Schedule of Held-to-maturity Securities Schedule of Held-to-maturity Securities [Line Items] Fair Value Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, Fair Value [Abstract] Fair Value Less than 12 months Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value Fair Value 12 months or longer Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value Total Fair Value Debt Securities, Held-to-maturity, Unrealized Loss Position, Fair Value Unrealized Loss Less than 12 months Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss Unrealized Loss 12 months or longer Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss Total Unrealized Loss Debt Securities, Held-to-maturity, Unrealized Loss Position, Accumulated Loss Leases Leases of Lessee Disclosure [Text Block] Available-for-Sale, Amortized Cost Debt Securities, Available-for-sale, Amortized Cost, Fiscal Year Maturity [Abstract] Due in one year or less Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Rolling within One Year, Amortized Cost Due in one year through five years Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Rolling after One Through Five Years, Amortized Cost Due in five through ten years Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Rolling after Five Through Ten Years, Amortized Cost Due in over ten years Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Rolling after 10 Years, Amortized Cost Amortized cost Debt Securities, Available-for-sale, Amortized Cost Available-for-Sale, Estimated Fair Value Debt Securities, Available-for-sale, Fair Value, Fiscal Year Maturity [Abstract] Due in one year or less Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Rolling within One Year, Fair Value Due in one year through five years Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Rolling after One Through Five Years, Fair Value Due in five through ten years Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Rolling after Five Through Ten Years, Fair Value Due in over ten years Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Rolling after 10 Years, Fair Value Estimated fair value Available-for-sale Securities Held-to-Maturity, Amortized Cost Debt Securities, Held-to-maturity, Maturity, Amortized Cost, Net [Abstract] Due in one year or less Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, Rolling within One Year, Amortized Cost Due in one year through five years Held-to-maturity Securities, Debt Maturities, Rolling Years Two Through Five, Amortized Cost Held-to-maturity Securities, Debt Maturities, Rolling Years Two Through Five, Amortized Cost Due in five through ten years Held-to-maturity Securities, Debt Maturities, Rolling Years Six Through Ten, Amortized Cost Held-to-maturity Securities, Debt Maturities, Rolling Years Six Through Ten, Amortized Cost Due in over ten years Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, Rolling after 10 Years, Amortized Cost Amortized cost Held-to-Maturity, Estimated Fair Value Debt Securities, Held-to-maturity, Maturity, Fair Value [Abstract] Due in one year or less Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, Rolling within One Year, Fair Value Due in one year through five years Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, Rolling after One Through Five Years, Fair Value Due in five through ten years Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, Rolling after Five Through Ten Years, Fair Value Due in over ten years Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, Rolling after 10 Years, Fair Value Estimated Fair Value Debt Securities, Held-to-maturity, Fair Value Operating lease cost Operating Lease, Expense Short-term lease cost Short-term Lease, Cost Variable lease cost Variable Lease, Cost Sublease income Operating Lease, Lease Income Total lease cost, net Operating Leases, Rent Expense, Net Schedule of Debt Schedule of Debt [Table Text Block] Regulatory Capital Regulatory Capital Requirements under Banking Regulations [Text Block] Schedule of Available-for-sale Securities Schedule of Available-for-sale Securities [Table] Other agency securities Other Agency Securities [Member] US government agency securities collateralized by SBA loans Commercial mortgage-backed securities Commercial Mortgage Backed Securities [Member] Fair Value Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items] Fair Value Less than 12 Months Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value Fair Value 12 Months or Longer Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value Total Fair Value Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value Unrealized Loss Less than 12 Months Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss Unrealized Loss 12 Months or Longer Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss Total Unrealized Loss Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss Receivables [Abstract] Financing Receivable, Past Due Financing Receivable, Past Due [Table] Financial Asset, Period Past Due Financial Asset, Period Past Due [Axis] Total past due 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] Greater than 90 days past due Financial Asset, Equal to or Greater than 90 Days Past Due [Member] Credit Quality Indicator Internal Credit Assessment [Axis] Internal Credit Assessment Internal Credit Assessment [Domain] Accruing loans and leases Performing Financial Instruments [Member] Non-accruing loans and leases Nonperforming Financial Instruments [Member] Class of Financing Receivable Class of Financing Receivable [Axis] Class of Financing Receivable Class of Financing Receivable [Domain] Commercial real estate — owner occupied Commercial Real Estate Loans Receivable - Owner Occupied [Member] Commercial Real Estate Loans Receivable - Owner Occupied [Member] Commercial real estate — non-owner occupied Commercial Real Estate Loans Receivable - Non-owner Occupied [Member] Commercial Real Estate Loans Receivable - Non-owner Occupied [Member] Land development Commercial Real Estate Loans Receivable - Land Development [Member] Commercial Real Estate Loans Receivable - Land Development [Member] Construction Commercial Real Estate Loans Receivable - Construction [Member] Commercial Real Estate Loans Receivable - Construction [Member] Multi-family Commercial Real Estate Loans Receivable - Multi-Family [Member] Commercial Real Estate Loans Receivable - Multi-Family [Member] 1-4 family Commercial Real Estate Loans Receivable - 1-4 Family [Member] Commercial Real Estate Loans Receivable - 1-4 Family [Member] Commercial and industrial Commercial and Industrial Loans Receivable [Member] Commercial and Industrial Loans Receivable [Member] Direct financing leases, net Finance Leases Portfolio Segment [Member] Home equity and second mortgages Home Equity Loans and Second Mortage Loans Receivable [Member] Home Equity Loans and Second Mortage Loans Receivable [Member] Other Other Loans Receivable [Member] Other Loans Receivable [Member] Financing Receivable, Recorded Investment, Summary of Past Due and Current Loans Receivable Financing Receivable, Past Due [Line Items] Financing Receivable, Recorded Investment, Aging [Abstract] Financing Receivable, Recorded Investment, Aging [Abstract] Total Past Due Financing Receivable, Past Due Current Financing Receivable, Not Past Due Accrual loans and leases Financing Receivable, Recorded Investment, Accrual Status Financing Receivable, Recorded Investment, Accrual Status Non-accrual loans and leases Financing Receivable, Nonaccrual Loans and Leases Receivable, before Fees, Gross Loans and Leases Receivable, before Fees, Gross 30 to 59 days past due, percent of total portfolio Financing Receivable, Recorded Investment, 30 to 59 Days Past Due, Percent of Portfolio Financing Receivable, Recorded Investment, 30 to 59 Days Past Due, Percent of Portfolio 60 to 89 days past due, percent of total portfolio Financing Receivable, Recorded Investment, 60 to 89 Days Past Due, Percent of Portfolio Financing Receivable, Recorded Investment, 60 to 89 Days Past Due, Percent of Portfolio Greater than 90 days past due, percent of portfolio Financing Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due, Percent of Portfolio Financing Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due, Percent of Portfolio Past due, percent of total portfolio Financing Receivable, Recorded Investment, Past Due, Percent of Portfolio Financing Receivable, Recorded Investment, Past Due, Percent of Portfolio Current, percent of total portfolio Financing Receivable, Recorded Investment, Current, Percent of Portfolio Financing Receivable, Recorded Investment, Current, Percent of Portfolio Gross loans, percent of total portfolio Financing Receivable, Recorded Investment, Gross, Percent of Portfolio Financing Receivable, Recorded Investment, Gross, Percent of Portfolio Loan and Lease Receivables, Impaired Loans and Leases and Allowance for Loan and Lease Losses Loans, Notes, Trade and Other Receivables Disclosure [Text Block] Financing Receivable, Credit Quality Indicator Financing Receivable, Credit Quality Indicator [Table] Total consumer and other Total consumer and other loans receivable [Member] Total Consumer and Other Loans Receivable [Member] Financing Receivable, Recorded Investment Financing Receivable, Credit Quality Indicator [Line Items] SBA loans in the participation sold portfolio, considered impaired SBA loans in the participation sold portfolio, considered impaired SBA loans in the participation sold portfolio, considered impaired Guaranteed portion of SBA loans sold to third parties Guaranteed Portion of SBA Loans Sold to Third Parties Total Guaranteed Portion of SBA Loans Sold to Third Parties Total Total amount of outstanding SBA loans sold Total amount of outstanding SBA loans sold Total amount of outstanding SBA loans sold Loans and leases transferred to third parties total principal amount Loans And Leases Transferred To Third Parties Total Principal Amount Loans And Leases Transferred To Third Parties Total Principal Amount Gain (Loss) Recognized on Participation Interest in Originated Loans Gain (Loss) Recognized on Participation Interest in Originated Loans Gain (Loss) Recognized on Participation Interest in Originated Loans Total amount of outstanding loans transferred to third parties as loan participations Total amount of outstanding loans transferred to third parties as loan participations Total amount of outstanding loans transferred to third parties as loan participations Total amount of loan participations remaining on the Corporations balance sheet Total Amount Of Loan Participations Remaining On The Corporations Balance Sheet Total Amount Of Loan Participations Remaining On The Corporations Balance Sheet Loans in the participation sold portfolio, considered impaired Loans in the participation sold portfolio, considered impaired Loans in the participation sold portfolio, considered impaired Loan participations purchased on the Corporation's balance sheet Loan participations purchased on the Corporation's balance sheet Loan participations purchased on the Corporation's balance sheet Non-accrual troubled debt restructurings Non-accrual Troubled Debt Restructurings Non-accrual Troubled Debt Restructurings Specific Reserves on Troubled Debt Restructurings Specific Reserves on Troubled Debt Restructurings Specific Reserves on Troubled Debt Restructurings Unfunded commitments, troubled debt restructurings Unfunded commitments, troubled debt restructurings Unfunded commitments, troubled debt restructurings Financing Receivable, Troubled Debt Restructuring, Subsequent Default, Number of Contracts Financing Receivable, Troubled Debt Restructuring, Subsequent Default, Number of Contracts Financing Receivable, Troubled Debt Restructuring, Subsequent Default Financing Receivable, Troubled Debt Restructuring, Subsequent Default Loans and leases receivable, difference between recorded investment and unpaid principal balance Loans and Leases Receivable, Difference between Recorded Investment and Unpaid Principal Balance Loans and Leases Receivable, Difference between Recorded Investment and Unpaid Principal Balance Performing troubled debt restructurings Financing Receivable, Modifications, Performing Troubled Debt Restructuring Financing Receivable, Modifications, Performing Troubled Debt Restructuring Description of Material Affects of Noncompliance Description of Material Affects of Noncompliance Number of available-for-sale securities sold Number of available-for-sale securities sold Number of available-for-sale securities sold Securities pledged to secure various obligations Pledged Financial Instruments, Not Separately Reported, Securities Number of available-for-sales securities in an unrealized loss position Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions Number of available-for-sale securities in an unrealized loss position, twelve months or greater Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Greater than or Equal to One Year Other than temporary impairment on available-for-sale securities recorded on the income statement Other than Temporary Impairment Losses, Investments, Available-for-sale Securities Number of held-to-maturity securities in an unrealized loss position Held-to-maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions Number of held-to-maturity Securities in an unrealized loss position, twelve months or greater Held-to-Maturity Securities, Securities in Unrealized Loss Positions, Qualitative Disclosures, Number of Positions 12 months or greater Held-to-Maturity Securities, Securities in Unrealized Loss Positions, Qualitative Disclosures, Number of Positions 12 months or greater Other than temporary impairment on held-to-maturity securities recorded on the income statement Other-than-temporary Impairment Loss, Debt Securities, Held-to-maturity, before Tax Statement of Comprehensive Income [Abstract] Net income Net Income (Loss) Attributable to Parent Other comprehensive income, before tax Other Comprehensive Income (Loss), Securities, Available-for-sale, Adjustment, before Tax [Abstract] Unrealized securities gains arising during the period Other Comprehensive Income (Loss), Securities, Available-for-Sale, Unrealized Holding Gain (Loss) Arising During Period, before Tax Reclassification adjustment for net loss realized in net income Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, before Tax Amortization of net unrealized losses transferred from available-for-sale Other Comprehensive Income (Loss), Amortization of Net Unrealized Losses Transferred to Held-to-Maturity from Available-for-Sale, before tax Other Comprehensive Income (Loss), Amortization of Net Unrealized Losses Transferred to Held-to-Maturity from Available-for-Sale, before tax Unrealized losses on interest rate swaps arising during the period Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, before Tax Income tax expense Other Comprehensive Income (Loss), Available-for-sale Securities, Tax, Portion Attributable to Parent Total other comprehensive income Other Comprehensive Income (Loss), Net of Tax Comprehensive income Comprehensive Income (Loss), Net of Tax, Attributable to Parent Statement of Stockholders' Equity [Abstract] Statement [Table] Statement [Table] Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Retained earnings Retained Earnings [Member] Common stock Common Stock [Member] Statement [Line Items] Statement [Line Items] Common stock, cash dividends, per share, declared Common Stock, Dividends, Per Share, Declared Schedule of Impaired Financing Receivable Schedule of Impaired Financing Receivable [Table] Total non-accrual commercial real estate Commercial Real Estate Portfolio Segment [Member] Total non-accrual consumer and other loans Financing Receivable, Impaired Financing Receivable, Impaired [Line Items] Foreclosed properties, net Total non-performing assets Total Nonperforming Assets Total Nonperforming Assets Total impaired assets Impaired Assets Impaired Assets Total non-accrual loans and leases to gross loans and leases Loans and Leases Receivable, Ratio of Nonperforming Loans to All Loans Total non-performing assets to total gross loans and leases plus foreclosed properties, net Ratio of Total Nonperforming Assets to Gross Loans and Leases Plus Foreclosed Properties, Net Ratio of Total Nonperforming Assets to Gross Loans and Leases Plus Foreclosed Properties, Net Total non-performing assets to total assets Ratio of Total Nonperforming Assets to Total Assets Ratio of Total Nonperforming Assets to Total Assets Allowance for loan and lease losses to gross loans and leases Ratio of Allowance for Loan and Lease Losses to Total Gross Loans and Leases Ratio of Allowance for Loan and Lease Losses to Total Gross Loans and Leases Allowance for loan and lease losses to non-accrual loans and leases Ratio of Allowance for Loan and Leases Losses to Non-accrual Loans and Leases Ratio of Allowance for Loan and Leases Losses to Non-accrual Loans and Leases Deposits [Abstract] Deposits Deposit [Table] Deposit [Table] Deposit Type Deposit Type [Axis] Deposit Type [Axis] Deposit Type Deposit Type [Domain] [Domain] for Deposit Type [Axis] Non-interest-bearing transaction accounts Non-interest-bearing Transaction Accounts [Member] Non-interest-bearing Transaction Accounts [Member] Interest-bearing transaction accounts Interest-bearing Transaction Accounts [Member] Interest-bearing Transaction Accounts [Member] Money market accounts Money Market Accounts [Member] Money Market Accounts [Member] Certificates of deposit Non-brokered Certificates of Deposit [Member] Non-brokered Certificates of Deposit [Member] Wholesale deposits Brokered Certificates of Deposit [Member] Brokered Certificates of Deposit [Member] Deposits Deposit [Line Items] [Line Items] for Deposit [Table] Average balance, deposits Average Balance, Deposits Average Balance, Deposits Deposits, weighted average interest rate during the period Deposits, Weighted Average Interest Rate During the Period Deposits, Weighted Average Interest Rate During the Period Derivative Financial Instruments Derivative Instruments and Hedging Activities Disclosure [Text Block] Fair Value, Recurring and Nonrecurring Fair Value, Recurring and Nonrecurring [Table] Measurement Frequency Measurement Frequency [Axis] Measurement Frequency Measurement Frequency [Domain] Fair value on a non-recurring basis Fair Value, Nonrecurring [Member] Asset Class Asset Class [Axis] Fair Value by Asset Class Asset Class [Domain] Impaired loans Impaired Loans [Member] Impaired Loans [Member] Foreclosed properties Foreclosed Properties [Member] Foreclosed Properties [Member] Loan servicing rights Loan servicing rights [Member] Loan servicing rights [Member] Fair Value Hierarchy and NAV Fair Value Hierarchy and NAV [Axis] Fair Value, Measurements, Fair Value Hierarchy Fair Value Hierarchy and NAV [Domain] Fair Value Measurements - Level 1 Inputs Fair Value, Inputs, Level 1 [Member] Fair Value Measurements - Level 2 Inputs Fair Value, Inputs, Level 2 [Member] Fair Value Measurements - Level 3 Inputs Fair Value, Inputs, Level 3 [Member] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Assets, Fair Value Disclosure Assets, Fair Value Disclosure Financing Receivable, Troubled Debt Restructuring Financing Receivable, Troubled Debt Restructuring [Table] Troubled debt restructurings Financing Receivable, Troubled Debt Restructuring [Line Items] Number of Loans Financing Receivable, Modifications, Number of Contracts Pre-Modification Recorded Investment Financing Receivable, Troubled Debt Restructuring, Premodification Post-Modification Recorded Investment Financing Receivable, Troubled Debt Restructuring, Postmodification Earnings Per Share [Abstract] Earnings Per Common Share Earnings Per Share [Text Block] Composition of Borrowed Funds Composition of Borrowed Funds [Table] Composition of Borrowed Funds [Table] Debt Instrument Debt Instrument [Axis] Debt Instrument, Name Debt Instrument, Name [Domain] Federal funds purchased Federal Funds Purchased [Member] FHLB advances FHLB advances [Member] FHLB advances [Member] Other borrowings Other Borrowings [Member] Other Borrowings [Member] Subordinated notes payable(1) Subordinated Debt [Member] Junior subordinated notes Junior Subordinated Debt [Member] Short-term Debt, Type Short-term Debt, Type [Axis] Short-term Debt, Type Short-term Debt, Type [Domain] Short-term borrowings Short-term Debt [Member] Long-term Debt, Type Long-term Debt, Type [Axis] Long-term Debt, Type Long-term Debt, Type [Domain] Long-term borrowings Long-term Debt [Member] Composition of Borrowed Funds Composition of Borrowed Funds [Line Items] [Line Items] for Composition of Borrowed Funds [Table] Borrowed funds Debt and Lease Obligation Borrowed funds, average balance Borrowed Funds, Average Balance Borrowed Funds, Average Balance Borrowed funds, interest rate during period Debt Instrument, Interest Rate During Period Number of Restricted Shares Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Nonvested balance, beginning Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Granted Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Vested Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Forfeited Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Nonvested balance, ending 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 balance, beginning Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Granted (1) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Vested Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Forfeited Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Nonvested balance, ending Allowance for loan and lease losses Loans and Leases Receivable, Allowance Preferred stock, par value Preferred Stock, Par or Stated Value Per Share Preferred stock, shares authorized Preferred Stock, Shares Authorized Preferred stock, shares issued Preferred Stock, Shares Issued Preferred stock, shares outstanding Preferred Stock, Shares Outstanding Common stock, par value Common Stock, Par or Stated Value Per Share Common stock, shares authorized Common Stock, Shares Authorized Common stock, shares issued Common Stock, Shares, Issued Common stock, shares outstanding Common Stock, Shares, Outstanding Treasury stock, shares Treasury Stock, Shares Restricted Stock Activity Share-based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity [Table Text Block] Additional paid-in capital Additional Paid-in Capital [Member] Accumulated Other Comprehensive Loss AOCI Attributable to Parent [Member] Treasury stock Treasury Stock [Member] Common shares outstanding Beginning balance Cumulative Effect of New Accounting Principle in Period of Adoption Cumulative Effect of New Accounting Principle in Period of Adoption Other comprehensive income (loss) Other Comprehensive Income (Loss), Securities, Available-for-Sale, Unrealized Holding Gain (Loss) Arising During Period, after Tax Share-based compensation - restricted shares, shares issued Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture Share-based compensation - restricted shares APIC, Share-based Payment Arrangement, Increase for Cost Recognition Cash dividends ($0.165 per share during 2020 and $0.15 per share during 2019) Dividends, Common Stock, Cash Treasury stock purchased, shares Treasury Stock, Shares, Acquired Treasury stock purchased Treasury Stock, Value, Acquired, Cost Method Common shares outstanding Ending balance SBA 7(a) loans Small Business Administration 7(a) Loans Small Business Administration 7(a) Loans SBA 504 Loans Small Business Administration 504 Loans Small Business Administration 504 Loans SBA Express Loans and lines of credit Small Business Administration Express Loans Small Business Administration Express Loans Total SBA loans Small Business Administration Loans Small Business Administration Loans on the balance sheet. Derivative Derivative [Table] Hedging Designation Hedging Designation [Axis] Hedging Designation Hedging Designation [Domain] Not Designated as Hedging Instrument Not Designated as Hedging Instrument [Member] Designated as Hedging Instrument Designated as Hedging Instrument [Member] Derivative, by Nature Derivative Instrument [Axis] Derivative, Name Derivative Contract [Domain] To commercial borrowers, corporation receives fixed rates and pays floating rates To Commercial Borrowers, Corporation Receives Fixed Rates and Pays Floating Rates [Member] To Commercial Borrowers, Corporation Receives Fixed Rates and Pays Floating Rates [Member] To dealer countparties, corporation pays fixed rates and receives floating rates To Dealer Countparties, Corporation Pays Fixed Rates and Receives Floating Rates [Member] To Dealer Countparties, Corporation Pays Fixed Rates and Receives Floating Rates [Member] Interest rate swaps Interest Rate Swap [Member] Statistical Measurement Statistical Measurement [Axis] Statistical Measurement Statistical Measurement [Domain] Minimum Minimum [Member] Maximum Maximum [Member] Derivatives Derivative [Line Items] Derivative, Notional Amount Derivative, Notional Amount Derivative, maturity date Derivative, Maturity Date Interest Rate Swaps, Default Interest Rate Swaps, Default Fair value of interest rate swaps that are in default Interest rate swap contracts not designated as hedging instruments - liabilities, gross Fair value of interest rate swaps Derivative asset, fair value, amount offset against collateral Derivative Asset, Fair Value, Amount Offset Against Collateral Interest rate derivative instruments not designated as hedging instruments at fair value, net Interest Rate Derivative Instruments Not Designated as Hedging Instruments at Fair Value, Net Pretax unrealized gain on interest rates swaps designated as cash flow hedges Gain recognized in income on ineffective portion of hedges Derivative Instruments, Gain (Loss) Recognized in Income, Ineffective Portion and Amount Excluded from Effectiveness Testing, Net Basic earnings per common share Earnings Per Share, Basic [Abstract] Net income Less: earnings allocated to participating securities Undistributed Earnings (Loss) Allocated to Participating Securities, Basic Basic earnings allocated to common stockholders Net Income (Loss) Available to Common Stockholders, Basic Weighted-average common shares outstanding, excluding participating securities Weighted Average Number of Shares Outstanding, Basic Basic earnings per common share Earnings Per Share, Basic Diluted earnings per common share Earnings Per Share, Diluted [Abstract] Diluted earnings allocated to common shareholders Net Income (Loss) Available to Common Stockholders, Diluted Weighted-average diluted common shares outstanding, excluding participating securities Weighted Average Number of Shares Outstanding, Diluted Diluted earnings per common share Earnings Per Share, Diluted Loans and Leases Receivable, Allowance for Loan Losses Loans and Leases Receivable, Allowance for Loan Losses Policy [Policy Text Block] Loan Composition Schedule Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] Ownership of SBA Loans Ownership of SBA Loans [Table Text Block] Ownership of SBA Loans [Table Text Block] Financing Receivable by Credit Quality Indicators Financing Receivable Credit Quality Indicators [Table Text Block] Past Due Financing Receivables Financing Receivable, Past Due [Table Text Block] Schedule of Financing Receivables, Non Accrual Status Financing Receivable, Nonaccrual [Table Text Block] Troubled Debt Restructurings on Financing Receivables Financing Receivable, Troubled Debt Restructuring [Table Text Block] Impaired Financing Receivables Impaired Financing Receivables [Table Text Block] Allowance for Loan and Lease Losses by Portfolio Segment Financing Receivable, Current, Allowance for Credit Loss [Table Text Block] Allowance for Loan and Lease Losses and Balances by Type of Allowance Methodology Financing Receivable, Allowance for Credit Loss [Table Text Block] Earnings Per Share Earnings Per Share, Policy [Policy Text Block] Number of shares available for grant Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant Deferred compensation expense yet to be recognized Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount Period of time that deferred compensation expense will be recognized Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition Deposits Deposit Liabilities Disclosures [Text Block] Loans and Leases Receivable Disclosure Loans and Leases Receivable Disclosure [Table] Financing Receivable Portfolio Segment Financing Receivable Portfolio Segment [Axis] Financing Receivable Portfolio Segment Financing Receivable Portfolio Segment [Domain] Total commercial real estate Loans and Leases Receivable Disclosure Loans and Leases Receivable Disclosure [Line Items] Deferred loan fees Loans and Leases Receivable, Deferred Income Loans and leases receivable, net amount Schedule of Earnings Per Share, Basic and Diluted Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Fair value on a recurring basis Fair Value, Recurring [Member] Available-for-Sale Securities U.S. government agency securities - government-sponsored enterprises US Government-sponsored Enterprises Debt Securities [Member] Other securities Other Debt and Equity Securities [Member] Other Debt and Equity Securities [Member] Liability Class Liability Class [Axis] Fair Value by Liability Class Fair Value by Liability Class [Domain] Derivative Liability Derivative Liability Share-based Compensation, Option and Incentive Plans Share-based Payment Arrangement [Policy Text Block] Income Statement [Abstract] Interest income Interest and Dividend Income, Operating [Abstract] Loans and leases Interest and Fee Income, Loans and Leases Securities Interest and Dividend Income, Securities, Operating, Available-for-sale Short-term investments Interest Income, Deposits with Financial Institutions Total interest income Interest and Dividend Income, Operating Interest expense Interest Expense [Abstract] Deposits Interest Expense, Deposits Federal Home Loan Bank advances and other borrowings Interest Expense Federal Home Loan Bank and Other Borrowings Notes payable and other borrowings Junior subordinated notes Interest Expense, Junior Subordinated Debentures Total interest expense Interest Expense Net interest income Interest Income (Expense), Net Provision for loan and lease losses Provision for Loan and Lease Losses Net interest income after provision for loan and lease losses Interest Income (Expense), after Provision for Loan Loss Non-interest income Noninterest Income [Abstract] Private wealth management service fees Investment Banking, Advisory, Brokerage, and Underwriting Fees and Commissions Gain on sale of Small Business Administration loans Gain (Loss) on Sale of Other Loans and Leases Service charges on deposits Revenue from Contract with Customer, Including Assessed Tax, Service Charges on Deposits Revenue from Contract with Customer, Including Assessed Tax, Service Charges on Deposits Loan fees Revenue from Contract with Customer, Including Assessed Tax, Loan Fees Revenue from Contract with Customer, Including Assessed Tax, Loan Fees Increase in cash surrender value of bank-owned life insurance Bank Owned Life Insurance Income Net loss on sale of securities Available-for-sale Securities, Gross Realized Gain (Loss) Commercial loan swap fees Swap Fee Income Non-interest income from loan swaps Other non-interest income Noninterest Income, Other Operating Income Total non-interest income Noninterest Income Non-interest expense Noninterest Expense [Abstract] Compensation Labor and Related Expense Occupancy Occupancy, Net Professional fees Professional Fees Expense Professional fees Data processing Information Technology and Data Processing Marketing Marketing and Advertising Expense Equipment Equipment Expense Computer software Computer Software Expense Computer Software Expense FDIC insurance Federal Deposit Insurance Corporation Premium Expense Collateral liquidation costs (recovery) Collateral Liquidation Costs Collateral liquidation costs Net loss on foreclosed properties Gains (Losses) on Sales of Other Real Estate Tax credit investment impairment Expense Related to Investment in Historic Rehabilitation Tax Credits Expense Related to Investment in Historic Rehabilitation Tax Credits SBA recourse provision SBA Recourse Provision SBA Recourse Provision Other non-interest expense Other Noninterest Expense Total non-interest expense Noninterest Expense Income before income tax expense (benefit) Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest Income tax expense (benefit) Income Tax Expense (Benefit) Net income Earnings per common share Basic Diluted Dividends declared per share Deposits Deposits [Table Text Block] Deposits [Table Text Block] Organization, Consolidation and Presentation of Financial Statements [Abstract] Nature of Operations and Summary of Significant Accounting Policies Organization, Consolidation, Basis of Presentation, Business Description and Accounting Policies [Text Block] Recorded Investment(1) Impaired Financing Receivable, Recorded Investment [Abstract] With no impairment reserve recorded Impaired Financing Receivable, with No Related Allowance, Recorded Investment With impairment reserve recorded Impaired Financing Receivable, with Related Allowance, Recorded Investment Total Impaired Financing Receivable, Recorded Investment Unpaid Principal Balance Impaired Financing Receivable, Unpaid Principal Balance [Abstract] With no impairment reserve recorded Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance With impairment reserve recorded Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance Total Impaired Financing Receivable, Unpaid Principal Balance Impairment Reserve Impairment reserve [Abstract] Impairment reserve [Abstract] Impairment Reserve Impaired Financing Receivable, Related Allowance Average Recorded Investment(2) Impaired Financing Receivable, Average Recorded Investment [Abstract] With no impairment reserve recorded Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment With impairment reserve recorded Impaired Financing Receivable, with Related Allowance, Average Recorded Investment Total Impaired Financing Receivable, Average Recorded Investment Foregone Interest Income Foregone interest income [Abstract] Foregone interest income [Abstract] With no impairment reserve recorded Impaired Financing Receivable, with No Related Allowance, Foregone Interest Income Impaired Financing Receivable, with No Related Allowance, Foregone Interest Income With impairment reserve recorded Impaired Financing Receivable, with Related Allowance, Foregone Interest Income Impaired Financing Receivable, with Related Allowance, Foregone Interest Income Foregone interest income Impaired Financing Receivable, Foregone Interest Income Impaired Financing Receivable, Foregone Interest Income Interest Income Recognized Impaired Financing Receivable, Interest Income, Accrual Method [Abstract] With no impairment reserve recorded Impaired Financing Receivable, with No Related Allowance, Interest Income, Cash Basis Method With impairment reserve recorded Impaired Financing Receivable, with Related Allowance, Interest Income, Cash Basis Method Total Impaired Financing Receivable, Interest Income, Cash Basis Method Net Foregone Interest Income Net foregone interest income [Abstract] Net foregone interest income [Abstract] With no impairment reserve recorded Impaired Financing Receivable, with No Related Allowance, Net Foregone Interest Income Impaired Financing Receivable, with No Related Allowance, Net Foregone Interest Income With impairment reserve recorded Impaired Financing Receivable, with Related Allowance, Net Foregone Interest Income Impaired Financing Receivable, with Related Allowance, Net Foregone Interest Income Total Impaired Financing Receivable, Net Foregone Interest Income Impaired Financing Receivable, Net Foregone Interest Income Impairment on right-of-use asset Operating Lease, Impairment Loss Document and Entity Information [Abstract] Entity Registrant Name Entity Registrant Name Entity Central Index Key Entity Central Index Key Current Fiscal Year End Date Current Fiscal Year End Date Document Type Document Type Document Period End Date Document Period End Date Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Amendment Flag Amendment Flag Entity Emerging Growth Company Entity Emerging Growth Company Entity Small Business Entity Small Business Entity Current Reporting Status Entity Current Reporting Status Entity Interactive Data Current Entity Interactive Data Current Entity Shell Company Entity Shell Company Entity Filer Category Entity Filer Category Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Entities [Table] Entities [Table] Entity Information [Line Items] Entity Information [Line Items] Statement of Cash Flows [Abstract] 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] Deferred income taxes, net Deferred Income Tax Expense (Benefit) Impairment of Tax Credit Investments Impairment of Tax Credit Investments Impairment of Tax Credit Investments SBA recourse provision Depreciation, amortization and accretion, net Depreciation, Amortization and Accretion, Net Net loss on sale of securities Marketable Securities, Gain (Loss) Increase in bank-owned life insurance policies Origination of loans held for sale Payments for Origination and Purchases of Loans Held-for-sale Sale of loans originated for sale Proceeds from Sale of Loans Held-for-sale Gain on sale of SBA loans originated for sale Gain (Loss) on Sale of Loans and Leases Net loss on foreclosed properties, including impairment valuation Excess tax expense (benefit) from share-based compensation Excess Tax Benefit from Share-based Compensation, Operating Activities Payments on operating leases Operating Lease, Payments Proceeds from Lease Payments Proceeds from Lease Payments Increase (Decrease) in Accounts Receivable and Other Operating Assets Increase (Decrease) in Accounts Receivable and Other Operating Assets Increase (Decrease) in Accrued Liabilities and Other Operating Liabilities Increase (Decrease) in Accrued Liabilities and Other Operating Liabilities Net cash provided by operating activities Net Cash Provided by (Used in) Operating Activities Investing activities Net Cash Provided by (Used in) Investing Activities [Abstract] Proceeds from maturities, redemptions, and paydowns of available-for-sale securities Proceeds from Maturities, Prepayments and Calls of Debt Securities, Available-for-sale Proceeds from maturities, redemptions, and paydowns of held-to-maturity securities Proceeds from Maturities, Prepayments and Calls of Held-to-maturity Securities Proceeds from sale of available-for-sale securities Proceeds from Sale of Debt Securities, Available-for-sale Purchases of available-for-sale securities Payments to Acquire Available-for-sale Securities Proceeds from sale of foreclosed properties Proceeds from Sale of Foreclosed Assets Net increase in loans and leases Payments for (Proceeds from) Loans and Leases Returns of investments in limited partnerships Proceeds from Equity Method Investment, Distribution, Return of Capital Investment in historic development entities Payments to Acquire Historic Development Entities Payments to Acquire Historic Development Entities Distribution from historic development entities Distribution from historic development entities Amount of distributions received from historic development entities classified as investing activities Investment in Federal Home Loan Bank stock Payments to Acquire Federal Home Loan Bank Stock Proceeds from the sale of Federal Home Loan Bank stock Proceeds from Sale of Federal Home Loan Bank Stock Purchases of leasehold improvements and equipment, net Payments to Acquire Productive Assets Purchases of bank-owned life insurance policies Payment to Acquire Life Insurance Policy, Investing Activities Net cash used in investing activities Net Cash Provided by (Used in) Investing Activities Financing activities Net Cash Provided by (Used in) Financing Activities [Abstract] Net (decrease) increase in deposits Increase (Decrease) in Deposits Repayment of Federal Home Loan Bank advances Payments of FHLBank Borrowings, Financing Activities Proceeds from Federal Home Loan Bank advances Proceeds from FHLBank Borrowings, Financing Activities Net increase in long-term borrowed funds Proceeds from (Repayments of) Notes Payable Cash dividends paid Payments of Ordinary Dividends, Common Stock Purchase of treasury 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, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect Cash and cash equivalents at the beginning of the period Cash and cash equivalents at the end of the period Supplementary cash flow information Supplemental Cash Flow Information [Abstract] Cash paid during the period for: Cash paid during the period for: [Abstract] Cash paid during the period for: [Abstract] Interest paid on deposits and borrowings Interest Paid, Excluding Capitalized Interest, Operating Activities Income Taxes Received Income Taxes Paid, Net Non-cash investing and financing activities: Noncash Investing and Financing Items [Abstract] Right-of-use assets obtained Right-of-use assets obtained Right-of-use assets obtained in exchange for operating lease liabilities as a result of ASU 842. Schedule of Available-for-sale Securities Schedule of Available-for-sale Securities Reconciliation [Table Text Block] Schedule of Held-to-maturity Securities Debt Securities, Held-to-maturity [Table Text Block] Investments Classified by Contractual Maturity Investments Classified by Contractual Maturity Date [Table Text Block] Schedule of Unrealized Loss on Investments Schedule of Unrealized Loss on Investments [Table Text Block] Internal Credit Assessment Category I Category I [Member] Category I [Member] Category II Category II [Member] Category II [Member] Category III Category III [Member] Category III [Member] Category IV Category IV [Member] Category IV [Member] Category as a % of total portfolio Category Rating as a Percentage of Total Loans and Leases Category Rating as a Percentage of Total Loans and Leases SBA Loans, Probability of Future Losses SBA Loans, Probability of Future Losses SBA Loans, Probability of Future Losses FHLB Advances, Other Borrowings and Junior Subordinated Notes Payable Debt Disclosure [Text Block] Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations [Table Text Block] Subsequent Events [Abstract] Industry Sector Industry Sector [Axis] Industry Sector Industry Sector [Domain] Hospitality, entertainment and restaurants, and food services Hospitality, entertainment and restaurants, and food services [Member] Hospitality, entertainment and restaurants, and food services [Member] Percentage of total gross loans and leases receivable Percentage of total gross loans and leases receivable Percentage of total gross loans and leases receivable Subsequent Event Subsequent Event [Table] Subsequent Event Type Subsequent Event Type [Axis] Subsequent Event Type Subsequent Event Type [Domain] Subsequent Event Subsequent Event [Member] Subsequent Event Subsequent Event [Line Items] Number of Short-Term Loan Modifications Number of Short-Term Loan Modifications Number of Short-Term Loan Modifications Gross Loans and Leases Outstanding, Short-Term Modification Gross Loans and Leases Outstanding, Short-Term Modification Gross Loans and Leases Outstanding, Short-Term Modification Payment Protection Program Applicants Payment Protection Program Applicants Payment Protection Program Applicants Payment Protection Program Fund Disbursement Approved Limit Payment Protection Program Fund Disbursement Approved Limit Payment Protection Program Fund Disbursement Approved Limit Payment Protection Program Fund Disbursements Payment Protection Program Fund Disbursements Payment Protection Program Fund Disbursements Payment Protection Program Fee Income Payment Protection Program Fee Income Payment Protection Program Fee Income Gross unrecognized holding gains Debt Securities, Held-to-maturity, Accumulated Unrecognized Gain Gross unrecognized holding losses Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss Estimated Fair Value Weighted-average remaining lease term (in years) Operating Lease, Weighted Average Remaining Lease Term Weighted-average discount rate Operating Lease, Weighted Average Discount Rate, Percent Fair Value Measurement Inputs and Valuation Techniques Fair Value Measurement Inputs and Valuation Techniques [Table] Weighted Average Weighted Average [Member] Fair Value Measurement Inputs and Valuation Techniques Fair Value Measurement Inputs and Valuation Techniques [Line Items] Quantification of unobservable inputs for level 3 values for impaired loans Quantification of unobservable inputs for Level 3 values for impaired loans Quantification of unobservable inputs for Level 3 values for impaired loans Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net [Abstract] Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net [Abstract] Fair value, assets, level 1 to level 2 transfers Fair Value, Assets, Level 1 to Level 2 Transfers, Amount1 Fair Value, Assets, Level 1 to Level 2 Transfers, Amount1 Fair value, assets, level 2 to Level 1 transfers Fair Value, Assets, Level 2 to Level 1 Transfers, Amount1 Fair Value, Assets, Level 2 to Level 1 Transfers, Amount1 Fair value, assets, transfers into level 3 Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3 Fair value, assets, transfers out of level 3 Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3 Fair value, liabilities, transfers out of level 3 Fair Value, Measurement with Unobservable Inputs Reconciliation, Liability, Transfers out of Level 3 Fair value, liabilities, level 1 to level 2 transfers Fair Value, Liabilities, Level 1 to Level 2 Transfers, Amount1 Fair Value, Liabilities, Level 1 to Level 2 Transfers, Amount1 Fair value, liabilities, level 2 to level 1 transfers Fair Value, Liabilities, Level 2 to Level 1 Transfers, Amount1 Fair Value, Liabilities, Level 2 to Level 1 Transfers, Amount1 Fair value, liabilities, transfers into level 3 Fair Value, Measurement with Unobservable Inputs Reconciliation, Liability, Transfers Into Level 3 Fair Value, by Balance Sheet Grouping Fair Value, by Balance Sheet Grouping [Table] Fair Value, Balance Sheet Grouping, Financial Statement Captions Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Financial assets: Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] Cash and cash equivalents, carrying amount Available-for-sale securities, carrying amount Securities held-to-maturity, carrying amount Loans held for sale, carrying amount Loans and leases receivable, net amount Federal Home Loan Bank stock, carrying amount Accrued interest receivable, carrying amount Interest rate swaps - assets, carrying amount Derivative Asset Cash and cash equivalents, fair value Cash and Cash Equivalents, Fair Value Disclosure Available-for-sale securities, fair value Held-to-maturity Securities, fair value Loans Held-for-sale, fair value Loans Held-for-sale, Fair Value Disclosure Loans and lease receivables, net, fair value Loans Receivable, Fair Value Disclosure Accrued interest receivable, fair value Accrued Interest Receivable Fair Value Disclosure Accrued Interest Receivable Fair Value Disclosure Interest rate swaps - assets, fair value Derivative Asset, Fair Value, Gross Asset Financial liabilities: Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract] Deposits, carrying amount Federal Home Loan Bank and other borrowings, carrying amount Junior subordinated notes, carrying amount Accrued interest payable, carrying amount Interest Payable Interest rate swaps - liabilities, carrying amount Standby letters of credit, carrying amount Letters of Credit Outstanding, Amount Deposits, fair value Deposits, Fair Value Disclosure Federal Home Loan Bank and other borrowings fair value Federal Home Loan Bank and Other Borrowings Fair Value Disclosure Federal Home Loan Bank and Other Borrowings Fair Value Disclosure Junior subordinated notes, fair value Subordinated Debt Obligations, Fair Value Disclosure Accrued interest payable, fair value Accrued Liabilities, Fair Value Disclosure Interest rate swaps - liabilities, fair value Derivative Liability, Fair Value, Gross Liability Standby letters of credit, fair value Standby Letters of Credit, Fair Value Disclosure Standby Letters of Credit, Fair Value Disclosure Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Principles of Consolidation Consolidation, Policy [Policy Text Block] Use of Estimates Use of Estimates, Policy [Policy Text Block] Reclassification Reclassification, Policy [Policy Text Block] Subsequent Events Subsequent Events, Policy [Policy Text Block] Recent Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Beginning balance SBA Recourse Reserve SBA Recourse Reserve SBA Loan Charge Offs, Net SBA Loan Charge Offs, Net SBA Loan Charge Offs, Net Ending balance Schedule of Derivative Instruments in Statement of Financial Position, Fair Value Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block] Securities Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] Share-Based Compensation Share-based Payment Arrangement [Text Block] Schedule of Available-for-sale Securities Debt Securities, Available-for-sale [Line Items] Gross unrealized holding gains Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax Gross unrealized holding losses Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax Fair Value Financing Receivable, Allowance for Credit Loss Financing Receivable, Allowance for Credit Loss [Table] Total commercial and Industrial Commercial and Industrial Loans and Leases Receivable [Member] Commercial and Industrial Loans and Leases Receivable [Member] Financing Receivable, Allowance for Credit Losses Financing Receivable, Allowance for Credit Loss [Line Items] Allowance for credit losses roll-forward Financing Receivable, Allowance for Credit Loss [Roll Forward] Allowance for loan and lease losses - begin Charge-offs Allowance for Loan and Lease Losses, Write-offs Recoveries Allowance for Loan and Lease Loss, Recovery of Bad Debts Net (charge-offs) recoveries Allowance for Loan and Lease Losses Write-offs, Net Provision for credit loss Allowance for loan and lease losses - end Subsequent Events Subsequent Events [Text Block] Summary of SBA Recourse Reserve Summary of SBA Recourse Reserve [Table Text Block] Summary of SBA Recourse Reserve [Table Text Block] Fair Value Measurements, Recurring Basis Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Fair Value Measurements, Nonrecurring Basis Fair Value Measurements, Nonrecurring [Table Text Block] Fair Value, by Balance Sheet Grouping Fair Value, by Balance Sheet Grouping [Table Text Block] Lease expense Lease, Cost [Table Text Block] Operating Lease Quantitative Information Operating Leases Quantitative Information [Table Text Block] Operating Leases Quantitative Information [Table Text Block] Operating Lease Maturity Analysis Lessee, Operating Lease, Liability, Maturity [Table Text Block] Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment Financing Receivable, Collectively Evaluated for Impairment Financing Receivable, Collectively Evaluated for Impairment Financing Receivable, Individually Evaluated for Impairment Financing Receivable, Individually Evaluated for Impairment Loans and Leases Receivable, Gross Loans and Leases Receivable, Gross Fair Value Disclosures Fair Value Disclosures [Text Block] Derivatives Derivatives, Policy [Policy Text Block] Schedule of Other Assets Schedule of Other Assets [Table Text Block]