Revenue from Contract with Customer [Abstract] Disaggregation of Revenue Disaggregation of Revenue [Table Text Block] Organization, Consolidation and Presentation of Financial Statements [Abstract] Basis of Presentation and Summary of Significant Accounting Policies Significant Accounting Policies [Text Block] Real Estate [Abstract] Other Real Estate [Roll Forward] Other Real Estate [Roll Forward] Beginning balance Real Estate Acquired Through Foreclosure Transfers of loans to ORE Repossessed Assets, New Real Estate Acquired Repossessed Assets, New Real Estate Acquired Sales Repossessed Assets, Sales of Real Estate Acquired Repossessed Assets, Sales of Real Estate Acquired Write-downs Repossessed Assets, Write-downs and Net Loss on Sales Charged to Expense Repossessed Assets, Write-downs and Net Loss on Sales Charged to Expense Ending balance Fair Value Disclosures [Abstract] Fair Value, by Balance Sheet Grouping Fair Value, by Balance Sheet Grouping [Table] Balance Sheet Location [Axis] Balance Sheet Location [Axis] Balance Sheet Location [Domain] Balance Sheet Location [Domain] Other Assets Other Assets [Member] Other Liabilities Other Liabilities [Member] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Reconciliation of all assets and liabilities measured at fair value on a recurring basis using significant unobservable inputs (level 3) [Rollforward] Reconciliation of All Assets and Liabilities Measured at Fair Value on Recurring Basis [Roll Forward] Reconciliation of all assets and liabilities measured at fair value on a recurring basis. Other assets rollforward Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Beginning balance Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value Issuances Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Issuances Settlements and closed loans Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements Expirations Fair Value Measurement with Unobservable Inputs Reconciliation Recurring Basis Asset Expirations1 Fair Value Measurement with Unobservable Inputs Reconciliation Recurring Basis Asset Expirations1 Ending balance Other liabilities rollforward Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Beginning balance Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value Issuances Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Issuances Settlements and closed loans Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Settlements Expirations Fair Value Measurement with Unobservable Inputs Reconciliation Recurring Basis Liability Expirations1 Fair Value Measurement with Unobservable Inputs Reconciliation Recurring Basis Liability Expirations1 Ending balance Transfers and Servicing [Abstract] Carrying Value of Loan Servicing Assets Carrying Value of Servicing Assets [Table Text Block] Carrying value of servicing assets. Activity in the Company's Mortgage Servicing Rights and Impairment Residential Mortgage Servicing Rights and Impairment [Table Text Block] Residential mortgage servicing rights and impairment. Estimates and Assumptions Used in Determining Impairment of MSRs Assumptions And Estimates In Determining Impairment Of Capitalized Mortgage Servicing Rights [Table Text Block] Assumptions and estimates in determining the impairment of capitalized mortgage servicing rights. Asset Quality of Residential Mortgage Loans Asset Quality of Mortgage Loans [Table Text Block] Asset quality of mortgage loans. Activity in SBA Loan Servicing Rights and Impairment SBA Loan Servicing Rights and Impairment [Table Text Block] SBA loan servicing rights and impairment. Estimates and Assumptions Used in Determining Impairment of SBA Loan Servicing Rights Assumptions and Estimates in Determining Impairment of Capitalized SBA Loan Servicing Rights [Table Text Block] Assumptions and estimates in determining the impairment of capitalized SBA loan servicing rights. Asset Quality of SBA Loans Asset Quality of SBA Loans [Table Text Block] Asset quality of SBA loans. Activity in Indirect Automobile Loan Servicing Rights Indirect Loan Servicing Rights [Table Text Block] Indirect Loan Servicing Rights [Table Text Block] Assumptions Used in Determining Fair Value of Indirect Automobile Loan Servicing Rights Assumptions and Estimates in Determining Impairment of Indirect Automobile Loans [Table Text Block] Assumptions and Estimates in Determining Impairment of Indirect Automobile Loans Asset Quality of Indirect Automobile Loans Indirect Servicing Asset Quality Of Loans [Table Text Block] Indirect Servicing Asset Quality Of Loans [Table Text Block] Receivables [Abstract] Schedule of Accounts, Notes, Loans and Financing Receivable Schedule of Accounts, Notes, Loans and Financing Receivable [Table] Financial Instrument [Axis] Financial Instrument [Axis] Financial Instruments [Domain] Financial Instruments [Domain] Commercial Commercial Real Estate Portfolio Segment [Member] Home equity lines of credit Home Equity Line of Credit [Member] Residential mortgage Residential Mortgage [Member] Accounts, Notes, Loans and Financing Receivable [Line Items] Accounts, Notes, Loans and Financing Receivable [Line Items] Loans pledged as collateral Loans Pledged as Collateral Schedule of Servicing Assets at Amortized Value Servicing Asset at Amortized Cost [Table] SBA loan servicing rights SBA Loan Servicing Rights [Member] SBA loan servicing rights. Types of S.B.A Loans [Axis] Types of S.B.A Loans [Axis] Types of SBA Loans [Axis] Types of S.B.A Loans [Domain] Types of S.B.A Loans [Domain] Types of SBA Loans [Domain] Fixed Rate Residential Mortgage Fixed Rate SBA Loans [Member] Fixed-rate SBA loans. Adjustable Rate Residential Mortgage Adjustable Rate SBA Loans [Member] Adjustable-rate SBA loans. Range [Axis] Range [Axis] Range [Domain] Range [Domain] Weighted Average Weighted Average [Member] Servicing Assets at Amortized Value [Line Items] Servicing Asset at Amortized Cost [Line Items] Assumptions and estimates in determining the impairment of capitalized SBA loan servicing rights Assumptions and Estimates in Determining Impairment of Capitalized SBA Loan Servicing Rights [Abstract] Assumptions and estimates in determining the impairment of capitalized SBA loan servicing rights. Fair Value Servicing Asset at Fair Value, Amount Composition of loans serviced for others (as a percent) Composition of Loans Serviced for Others Composition of Loans Serviced for Others Remaining term (years) Servicing Assets and Servicing Liabilities at Fair Value, Assumptions Used to Estimate Fair Value, Weighted Average Life Prepayment speed Servicing Assets and Servicing Liabilities at Fair Value, Assumptions Used to Estimate Fair Value, Prepayment Speed Decline in fair value due to a 10% adverse change Sensitivity Analysis of Fair Value, Transferor's Interests in Transferred Financial Assets, Impact of 10 Percent Adverse Change in Prepayment Speed Decline in fair value due to a 20% adverse change Sensitivity Analysis of Fair Value, Transferor's Interests in Transferred Financial Assets, Impact of 20 Percent Adverse Change in Prepayment Speed Discount rate (as a percent) Servicing Assets and Servicing Liabilities at Fair Value, Assumptions Used to Estimate Fair Value, Discount Rate Decline in fair value due to a 10% adverse change Sensitivity Analysis of Fair Value, Transferor's Interests in Transferred Financial Assets, Impact of 10 Percent Adverse Change in Discount Rate Decline in fair value due to a 20% adverse change Sensitivity Analysis of Fair Value, Transferor's Interests in Transferred Financial Assets, Impact of 20 Percent Adverse Change in Discount Rate Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value by Measurement Frequency [Axis] Measurement Frequency [Axis] Fair Value, Measurement Frequency [Domain] Fair Value, Measurement Frequency [Domain] Recurring Fair Value, Measurements, Recurring [Member] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Fair Value, Measurements, Fair Value Hierarchy [Domain] Fair Value Hierarchy and NAV [Domain] Quoted Prices in Active Markets for Identical Assets (Level 1) Fair Value, Inputs, Level 1 [Member] Significant Other Observable Inputs (Level 2) Fair Value, Inputs, Level 2 [Member] Significant Unobservable Inputs (Level 3) Fair Value, Inputs, Level 3 [Member] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Financial assets measured at fair value on a recurring basis and the change in fair value Financial Assets Measured at Fair Value on Recurring Basis and Change in Fair Value [Abstract] Financial assets measured at fair value on a recurring basis and the change in fair value. Investment securities available-for-sale Debt Securities, Available-for-sale Mortgage loans held-for-sale Mortgages Held-for-sale, Fair Value Disclosure Other assets Other Assets, Fair Value Disclosure Other liabilities Other Liabilities, Fair Value Disclosure Investments, Debt and Equity Securities [Abstract] Schedule of Gain (Loss) on Securities [Table] Schedule of Gain (Loss) on Securities [Table] Obligations of U.S. Government sponsored enterprises US Government Corporations and Agencies Securities [Member] Municipal securities US States and Political Subdivisions Debt Securities [Member] SBA SBA Loans [Member] SBA loans. Residential mortgage-backed securities Residential Mortgage Backed Securities [Member] Commercial mortgage-backed securities Commercial Mortgage Backed Securities [Member] Gain (Loss) on Securities [Line Items] Gain (Loss) on Securities [Line Items] Investment securities available-for-sale: Debt Securities, Available-for-sale, Unrealized Loss Position [Abstract] Available-for-sale, continuous unrealized loss position, less than twelve months, fair value Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months Available-for-sale, continuous unrealized loss position, less than twelve months, unrealized losses Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss Available-for-sale, continuous unrealized loss position, more than twelve months, fair value Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer Available-for-sale, continuous unrealized loss position, more than twelve months, unrealized losses Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss Investment securities held-to-maturity: Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, Fair Value [Abstract] Held-to-maturity securities, continuous unrealized loss position, less than twelve months, fair value Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value Held-to-maturity securities, continuous unrealized loss position, less than 12 Months, accumulated loss Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss Held-to-maturity securities, continuous unrealized loss position, twelve months or longer, fair value Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value Held-to-maturity securities, continuous unrealized loss position, 12 months or longer, accumulated loss Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss Other Real Estate, by Type Other Real Estate Owned [Table Text Block] Other Real Estate Owned [Table Text Block] Summary of Changes in Other Real Estate Other Real Estate, Roll Forward [Table Text Block] Schedule of Servicing Assets at Fair Value Schedule of Servicing Assets at Fair Value [Table] Product and Service [Axis] Product and Service [Axis] Product and Service [Domain] Product and Service [Domain] Servicing Fee Income Servicing Fee Income [Member] Servicing Fee Income [Member] Indirect automobile Indirect Automobile Loan [Member] Indirect Automobile Loan [Member] Servicing Assets at Fair Value [Line Items] Servicing Assets at Fair Value [Line Items] Sale of loans with unpaid principal Sale of Loan with Unpaid Principal Sale of loan with unpaid principal. Gain (loss) on sale of loans Gain (Loss) on Sale of Loans and Leases Bank service fees Revenue from Contract with Customer, Excluding Assessed Tax Residential mortgage loans sold (number of loans) Residential Mortgage Loans Sold, Number Of Loans Residential Mortgage Loans Sold, Number Of Loans Principal balance of loans sold in secondary market Principal Balance Of Loans Sold In Secondary Market Principal Balance Of Loans Sold In Secondary Market Mortgage recourse liability Mortgage Recourse Liability Mortgage Recourse Liability Earnings Per Share [Abstract] Earnings Per Common Share Earnings Per Share [Text Block] Disclosures about Fair Value of Financial Instruments Disclosures about Fair Value of Financial Instruments [Abstract] Disclosures about fair value of financial instruments. Measurement Basis [Axis] Measurement Basis [Axis] Fair Value, Disclosure Item Amounts [Domain] Fair Value Measurement [Domain] Portion at Fair Value Measurement [Member] Portion at Fair Value Measurement [Member] Carrying Amount Reported Value Measurement [Member] Total Fair Value Estimate of Fair Value Measurement [Member] Financial instruments (assets): Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] Cash and cash equivalents Cash and Cash Equivalents, Fair Value Disclosure Investment securities held-to-maturity Debt Securities, Held-to-maturity, Fair Value Total loans Loans Receivable, Fair Value Disclosure Financial instruments (liabilities): Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract] Noninterest-bearing demand deposits Noninterest Bearing Deposit Liabilities Fair Value Disclosure Noninterest bearing deposit liabilities fair value disclosure. Interest-bearing deposits Interest Bearing Deposits Liabilities Fair Value Disclosure Interest-bearing deposits liabilities fair value disclosure. Short-term borrowings Short Term Borrowings Fair Value Disclosure Short-term borrowings fair value disclosure. Subordinated debt Long-term Debt, Fair Value Document and Entity Information [Abstract] -- None. No documentation exists for this element. -- Entity registrant name Entity Registrant Name Entity central index key Entity Central Index Key Current fiscal year end date Current Fiscal Year End Date Entity filer category Entity Filer Category 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 common stock, shares outstanding (in shares) Entity Common Stock, Shares Outstanding Derivative Instruments and Hedging Activities Disclosure [Abstract] Gain (loss) on mortgage-related derivatives Derivative, Gain (Loss) on Derivative, Net Schedule of Real Estate Owned [Table] Schedule of Real Estate Owned [Table] Schedule of Real Estate Owned [Table] Loans Insured or Guaranteed by Government Authorities [Axis] Loans Insured or Guaranteed by Government Authorities [Axis] Loans Insured or Guaranteed by Government Authorities [Domain] Loans Insured or Guaranteed by Government Authorities [Domain] Loans Insured or Guaranteed by US Government Authorities Loans Insured or Guaranteed by US Government Authorities [Member] Real Estate Owned Disclosure [Line Items] Real Estate Owned Disclosure [Line Items] [Line Items] for Schedule of Real Estate Owned [Table] Unpaid principal balance of residential mortgage loans in process of foreclosure Mortgage Loans in Process of Foreclosure, Amount Investment Securities Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Service charges on deposit accounts Service Charges on Deposit Accounts [Member] Service Charges on Deposit Accounts [Member] Other Fees and Charges Other Fees and Charges [Member] Other Fees and Charges [Member] Trust and Wealth Management Trust and Wealth Management [Member] Trust and Wealth Management [Member] Total Other Total Other [Member] Total Other [Member] Insurance Commissions Insurance Commissions [Member] Insurance Commissions [Member] (Loss) on ORE Gain (Loss) on ORE [Member] Gain (Loss) on ORE [Member] Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Revenue from contract with customer Noninterest income (out-of-scope of Topic 606) Revenue Not From Contract With Customer Revenue Not From Contract With Customer Total noninterest income Noninterest Income Allowance for Loan Losses Allowance for Credit Losses [Text Block] Certain Transfers of Financial Assets Transfers and Servicing of Financial Assets [Text Block] Statement of Comprehensive Income [Abstract] Unrealized market adjustments for the period, tax (benefit) Other Comprehensive Income (Loss), Securities, Available-for-Sale, Unrealized Holding Gain (Loss) Arising During Period, Tax Subsequent Events [Abstract] Subsequent Event [Table] Subsequent Event [Table] Subsequent Event Type [Axis] Subsequent Event Type [Axis] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Subsequent Event Subsequent Event [Member] Subsequent Event [Line Items] Subsequent Event [Line Items] Residential mortgage servicing rights, sales Proceeds from Sale of Mortgage Servicing Rights (MSR) Percentage of mortgage serving portfolio sold Percentage Of Mortgage Serving Portfolio Sold Percentage Of Mortgage Serving Portfolio Sold Gain (loss) on sale of servicing assets Gain (Loss) On Sale Of Servicing Assets Gain (Loss) On Sale Of Servicing Assets Schedule of Available-for-sale and Held-to-maturity Securities [Table] Schedule of Available-for-sale and Held-to-maturity Securities [Table] Schedule of Available-for-sale and Held-to-maturity Securities [Table] Schedule of Available-for-sale and Held-to-maturity Securities [Line Items] Schedule of Available-for-sale and Held-to-maturity Securities [Line Items] Schedule of Available-for-sale and Held-to-maturity Securities [Line Items] Investment securities available-for-sale: Available-for-sale Securities, Debt Maturities [Abstract] Amortized Cost Debt Securities, Available-for-sale, Amortized Cost Gross Unrealized Gains Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax Gross Unrealized Losses Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax Fair Value Investment securities held-to-maturity: Debt Securities, Held-to-maturity, Maturity [Abstract] Amortized Cost Debt Securities, Held-to-maturity, Amortized Cost, before Other-than-temporary Impairment Gross Unrealized Gains Debt Securities, Held-to-maturity, Accumulated Unrecognized Gain Gross Unrealized Losses Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss Fair Value Mortgage-backed Securities Held-to-maturity, Fair Value Disclosure Statement of Financial Position [Abstract] Assets Assets [Abstract] Cash and due from banks Cash and Due from Banks Interest-bearing deposits with banks Interest-bearing Deposits in Banks and Other Financial Institutions Federal funds sold Federal Funds Sold Cash and cash equivalents Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Investment securities held-to-maturity (fair value of $19,701 and $19,410, respectively) Loans held-for-sale (includes loans at fair value of $252,238 and $225,342, respectively) Loans Receivable Held-for-sale, Net, Not Part of Disposal Group Loans Loans and Leases Receivable, Net of Deferred Income Allowance for loan losses Loans and Leases Receivable, Allowance Loans, net of allowance for loan losses Loans and Leases Receivable, Net Amount Premises and equipment, net Property, Plant and Equipment, Net Other real estate, net Bank owned life insurance Bank Owned Life Insurance Servicing rights, net Servicing Asset Other assets Other Assets Total assets Assets Liabilities Liabilities [Abstract] Deposits Deposits [Abstract] Noninterest-bearing demand deposits Noninterest-bearing Deposit Liabilities Interest-bearing deposits Interest-bearing Deposit Liabilities Total deposits Deposits Short-term borrowings Other Borrowings Subordinated debt, net Long-term Debt Other liabilities Other Liabilities Total liabilities Liabilities Shareholders’ equity Stockholders' Equity Attributable to Parent [Abstract] Preferred stock, no par value. Authorized 10,000,000; zero issued and outstanding Preferred Stock, Value, Issued Common stock, no par value. Authorized 50,000,000; issued and outstanding 27,629,860 and 27,279,729, respectively Common Stock, Value, Issued Accumulated other comprehensive income, net of tax Accumulated Other Comprehensive Income (Loss), Net of Tax Retained earnings Retained Earnings (Accumulated Deficit) Total shareholders’ equity Stockholders' Equity Attributable to Parent Total liabilities and shareholders’ equity Liabilities and Equity Acquired loans Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Carrying Amount, Net Financing Receivable Portfolio Segment [Axis] Financing Receivable Portfolio Segment [Axis] Financing Receivable Portfolio Segment [Domain] Financing Receivable Portfolio Segment [Domain] Commercial Portfolio Segment Commercial Portfolio Segment [Member] Class of Financing Receivable, Type [Axis] Class of Financing Receivable, Type [Axis] Financing Receivable Allowance [Domain] Class of Financing Receivable, Type [Domain] Commercial Loans Commercial Loan [Member] TDR modified for term Troubled Debt Restructured Term Troubled debt restructured term. TDR modified for interest rate Troubled Debt Restructured Interest Rate Troubled Debt Restructured Interest Rate Amount of loans restructured during period and subsequently redefaulted Financing Receivable, Modifications, Subsequent Default, Recorded Investment Troubled debt restructured loans Troubled Debt Restructured Loans Troubled debt restructured loans. Net income Net Income (Loss) Attributable to Parent Weighted average common shares outstanding - basic (in shares) Weighted Average Number of Shares Outstanding, Before Effect of Stock Dividends, Diluted Weighted average number of shares outstanding, before stock dividends, diluted. Effect of dilutive stock options and warrants (in shares) Incremental Common Shares Attributable Options and Warrants Incremental common shares attributable options and warrants. Weighted average common shares outstanding – diluted (in shares) Weighted Average Number of Shares Outstanding, Diluted EPS: Earnings Per Share, Basic and Diluted [Abstract] Basic (in dollars per share) Earnings Per Share, Basic Diluted (in dollars per share) Earnings Per Share, Diluted Schedule of Impaired Financing Receivable Schedule of Impaired Financing Receivable [Table] Construction Portfolio Segment Construction Portfolio Segment [Member] Construction Portfolio Segment [Member] Consumer Portfolio Segment Consumer Portfolio Segment [Member] Mortgage Portfolio Segment Residential Portfolio Segment [Member] Class of Financing Receivable, Type [Domain] Installment Loans and Personal Lines of Credits Installment Loans and Personal Lines of Credits [Member] Installment Loans and Personal Lines of Credits [Member] Residential Mortgage Real Estate Loan [Member] Home Equity Lines of Credit Home Equity Loan [Member] Financing Receivable, Impaired [Line Items] Financing Receivable, Impaired [Line Items] Unpaid principal balance, with related allowance Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance Recorded investment, with related allowance Impaired Financing Receivable, with Related Allowance, Recorded Investment Related Allowance Impaired Financing Receivable, Related Allowance Unpaid principal balance, with no related allowance Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance Recorded investment, with no related allowance Impaired Financing Receivable, with No Related Allowance, Recorded Investment Nonrecurring Fair Value, Measurements, Nonrecurring [Member] Assets Measured at Fair Value on Non Recurring Basis Assets Measured at Fair Value on Non Recurring Basis by Level Within Fair Value Hierarchy [Abstract] Assets measured at fair value on a non-recurring basis by level within the fair value hierarchy. Impaired loans Impaired Loans Fair Value Disclosure Impaired loans fair value disclosure. ORE, net Ore Fair Value Disclosure Ore fair value disclosure. Residential mortgage servicing rights Mortgage Servicing Rights Fair Value Disclosure Mortgage servicing rights fair value disclosure. Summary of Loans Held-for-Sale Loans Held For Sale [Table Text Block] Loans held for sale . Servicing Category [Axis] Servicing Category [Axis] Servicing Category [Axis] Servicing Category [Domain] Servicing Category [Domain] [Domain] for Servicing Category [Axis] Serviced for others Loan Servicing Portfolio [Member] Loan servicing portfolio. Held-for-sale Held-for-Sale [Member] Held-for-Sale. Held-for-investment Held-for-Investment [Member] Held-for-Investment. Indirect automobile Indirect Loan Servicing Rights [Member] Indirect Loan Servicing Rights [Member] Unpaid Principal Balance Principal Amount Outstanding of Loans Serviced Principal Amount Outstanding of Loans Serviced Delinquent 30 to 89 days Delinquent Amount at End of Period on Loans Serviced Thirty to Eighty Nine Days Delinquent Amount at End of Period on Loans Serviced Thirty to Eighty Nine Days Delinquent 90 plus days Delinquent Amount at End of Period on Loans Serviced Ninety Plus Days Delinquent Amount at End of Period on Loans Serviced Ninety Plus Days Net Charge-offs Loans Serviced, Charge Offs Loans Serviced, Charge Offs Common stock options excluded as potentially dilutive (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Number of available-for-sale securities in an unrealized loss position Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions Number of held-to-maturity securities in an unrealized loss position Held-to-maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions Other-than-temporary impairment loss Other-than-temporary Impairment Loss, Debt Securities, Portion Recognized in Earnings Gain (loss) on investments Debt and Equity Securities, Gain (Loss) Transfers of investment securities from available-for-sale to held-to-maturity Available-for-sale Securities, Transfers to Held-to-Maturity Available-for-sale Securities, Transfers to Held-to-Maturity Summary of Amortized Cost and Fair Value of Available-for-Sale Debt Securities Debt Securities, Available-for-sale [Table Text Block] Summary of Amortized Cost and Fair Value of Held-to-Maturity Debt Securities Debt Securities, Held-to-maturity [Table Text Block] Gross Unrealized Losses and Fair Values of Investment Securities Schedule of Unrealized Loss on Investments [Table Text Block] Amortized Cost and Fair Value of Investment Securities Investments Classified by Contractual Maturity Date [Table Text Block] Summary of Investment Securities Pledged as Collateral Schedule of Financial Instruments Owned and Pledged as Collateral [Table Text Block] Purchase Credit Impaired Loans, Reconciliation of Income Expected to be Collected [Roll Forward] Purchase Credit Impaired Loans, Reconciliation of Income Expected to be Collected [Roll Forward] Purchase Credit Impaired Loans, Reconciliation of Income Expected to be Collected [Roll Forward] Beginning balance Purchase Credit Impaired Loans, Interest Income Expected to be Collected Purchase Credit Impaired Loans, Interest Income Expected to be Collected Accretion of income Purchase Credit Impaired Loans, Interest Income Expected to be Collected, Accretion of Income Purchase Credit Impaired Loans, Interest Income Expected to be Collected, Accretion of Income Other activity, net Accretable Yield, Other Activity, Net Accretable Yield, Other Activity, Net Ending balance Derivative Instruments, Gain (Loss) by Hedging Relationship, by Income Statement Location, by Derivative Instrument Risk Derivative Instruments, Gain (Loss) [Table] Derivative Instrument Risk [Axis] Derivative Instrument [Axis] Derivative Contract Type [Domain] Derivative Contract [Domain] Forward rate commitments Forward Contracts [Member] Interest rate lock commitments Interest Rate Lock Commitments [Member] Derivative Instruments, Gain (Loss) [Line Items] Derivative Instruments, Gain (Loss) [Line Items] Company's derivative positions [Abstract] Derivative Positions [Abstract] Derivative positions. Contract or notional amount of derivatives Derivative, Notional Amount Statement of Stockholders' Equity [Abstract] Cash dividends paid per common share (in dollars per share) Common Stock, Dividends, Per Share, Declared Held-for-sale Mortgage Loans Held for Sale [Member] Mortgage loans held for sale. Held-for-investment Mortgage Loans Held for Investment [Member] Mortgage loans held-for-investment. Repurchase Agreements and Similar Transactions, Maturity Periods [Axis] Repurchase Agreements and Similar Transactions, Maturity Periods [Axis] Repurchase Agreements and Similar Transactions, Maturity Periods [Domain] Repurchase Agreements and Similar Transactions, Maturity Periods [Domain] Greater than 90 days Financing Receivables, 30 to 89 Days Past Due [Member] Financing Receivables, 30 to 89 Days Past Due [Member] Residential mortgage Residential Mortgage Servicing Rights [Member] Residential mortgage servicing rights. Mortgage loans delinquent 90 plus days Mortgage Loans Delinquent Ninety Plus Days Mortgage loans delinquent ninety plus days. Loans held for sale, applicable discount Loans Held for Sale, Applicable Discount Loans Held for Sale, Applicable Discount Mortgage loans delinquent 30 to 89 days Mortgage Loans Delinquent Thirty to Eighty Nine Days Mortgage loans delinquent thirty to eighty nine days. Residential mortgage Real Estate Mortgage Residential [Member] Real estate-mortgage-residential. Loans transferred to held for investment residential mortgage portfolio Increase (Decrease) in Loans Held-for-sale Amount pledged in residential real estate loans held-for-sale Amount Pledged in Residential Real Estate Loans Held-for-sale Amount Pledged in Residential Real Estate Loans Held-for-sale Summary of Changes in the Allowance for Loan Losses, by Portfolio Type Schedule of Credit Losses Related to Financing Receivables, Current and Noncurrent [Table Text Block] Balance of the Allowance for Loan Losses by Impairment Measurement Method and Related Recorded Investment Allowance for Credit Losses on Financing Receivables [Table Text Block] Analysis of the activity in the Company's SBA loan servicing rights and impairment [Rollforward] SBA Loan Servicing Rights and Impairment [Roll Forward] SBA loan servicing rights and impairment. SBA loan servicing rights SBA Loan Servicing Rights [Roll Forward] SBA Loan Servicing Rights Beginning carrying value, net Servicing Asset at Amortized Cost Additions Servicing Asset at Amortized Cost, Additions Amortization Servicing Asset at Amortized Cost, Amortization (Impairment) / recoveries, net Servicing Asset At Amortized Cost, Recovery, Net Servicing Asset At Amortized Cost, Recovery, Net Ending carrying value, net SBA servicing rights impairment Valuation Allowance for Impairment of Recognized Servicing Assets [Roll Forward] Beginning balance Valuation Allowance for Impairment of Recognized Servicing Assets, Balance Additions Valuation Allowance for Impairment of Recognized Servicing Assets, Additions for Expenses Recoveries Valuation Allowance for Impairment of Recognized Servicing Assets, Deductions for Recoveries Ending balance Asset quality of SBA loans Asset Quality of SBA Loans [Abstract] Asset quality of SBA loans. Unpaid Principal Balance Net Charge-offs Calculation of Earnings Per Common Share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Indirect automobile loan servicing rights Indirect automobile loan servicing rights Indirect Loan Servicing Rights [Roll Forward] Indirect Loan Servicing Rights [Roll Forward] Beginning carrying value Indirect Servicing Assets Indirect servicing assets. Amortization Ending carrying value Residential Mortgage Servicing Rights and Impairment [Roll Forward] Residential Mortgage Servicing Rights and Impairment [Roll Forward] Residential mortgage servicing rights and impairment. Residential Mortgage Servicing Rights [Roll Forward] Residential Mortgage Servicing Rights [Roll Forward] Residential Mortgage Servicing Rights [Roll Forward] Beginning carrying value, net Additions Residential Mortgage Servicing Rights, Additions Residential Mortgage Servicing Rights, Additions Amortization Amortization of Mortgage Servicing Rights (MSRs) (Impairment) / recoveries, net Mortgage Servicing Rights (MSR) Impairment (Recovery) Ending carrying value, net Residential Mortgage Servicing Rights Impairment [Roll Forward] Residential Mortgage Servicing Rights Impairment [Roll Forward] Residential Mortgage Servicing Rights Impairment [Roll Forward] Financial Instruments Measured at Fair Value on a Recurring Basis Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] Changes in Fair Value of Assets Within Fair Value Hierarchy Fair Value Measurements, Nonrecurring [Table Text Block] Significant Unobservable Inputs Used in the Fair Value Measurement of Level 3 Assets and Liabilities Fair Value Assets Measured On Nonrecurring Basis Unobservable Inputs [Table Text Block] Tabular disclosure of quantitative information about the inputs used in the fair value measurement of assets and liabilities. This disclosure may include, but is not limited to, the fair value of the asset or liability, valuation technique used to measure fair value, the inputs used to measure fair value, the ranges of the inputs, and the weighted averages of the inputs Difference Between the Aggregate Fair Value and the Aggregate Unpaid Principal Balance of Loans Held for Sale Fair Value Option, Disclosures [Table Text Block] Carrying Values and Fair Values of Financial Instruments Fair Value, by Balance Sheet Grouping [Table Text Block] Available-for-sale: Amortized Cost Debt Securities, Available-for-sale, Amortized Cost, Fiscal Year Maturity [Abstract] Due after one year through five years Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after One Through Five Years, Amortized Cost Due after five years through ten years Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after Five Through Ten Years, Amortized Cost Due after ten years Debt Securities, Available-for-sale, Allocated and Single Maturity Date, Maturity, after 10 Years, Amortized Cost Fair Value Debt Securities, Available-for-sale, Fair Value, Fiscal Year Maturity [Abstract] Due after one year through five years Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after One Through Five Years, Fair Value Due after five years through ten years Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after Five Through Ten Years, Fair Value Due after ten years Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after 10 Years, Fair Value Fair Value Held-to-maturity: Amortized Cost Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, Amortized Cost [Abstract] Due after five years through ten years Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, after One Through Five Years, Amortized Cost Due after ten years Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, after 10 Years, Amortized Cost Fair Value Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, Fair Value [Abstract] Due after five years through ten years Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, after Five Through Ten Years, Fair Value Due after ten years Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, after 10 Years, Fair Value Fair Value Investment securities held-to-maturity, fair value Investments, Fair Value Disclosure Loans held-for-sale, fair value Loans Held-for-sale, Fair Value Disclosure Preferred stock, par value (in dollars per share) Preferred Stock, No Par Value Preferred stock, shares authorized (in shares) Preferred Stock, Shares Authorized Preferred stock, shares issued (in shares) Preferred Stock, Shares Issued Preferred stock, shares outstanding (in shares) Preferred Stock, Shares Outstanding Common stock, par value (in dollars per share) Common Stock, No Par Value Common stock, shares authorized (in shares) Common Stock, Shares Authorized Common stock, shares issued (in shares) Common Stock, Shares, Issued Common stock, shares outstanding (in shares) Common Stock, Shares, Outstanding Statement [Table] Statement [Table] Other fees and charges Other Fees and Charges on Deposit Accounts [Member] Other Fees and Charges on Deposit Accounts [Member] Mortgage banking activities Mortgage Banking Activities [Member] Mortgage Banking Activities [Member] Statement [Line Items] Statement [Line Items] Interest income: Interest and Dividend Income, Operating [Abstract] Loans, including fees Interest and Fee Income, Loans and Leases Investment securities: Interest Income, Securities, Operating, by Taxable Status [Abstract] Taxable interest income Interest Income, Securities, Operating, Taxable Nontaxable interest income Interest Income, Securities, Operating, Tax Exempt Other Interest Income, Other Total interest income Interest and Dividend Income, Operating Interest expense: Interest Expense [Abstract] Deposits Interest Expense, Deposits Short-term borrowings Interest Expense, Debt Subordinated debt Interest Expense, Subordinated Notes and Debentures Total interest expense Interest Expense Net interest income Interest Income (Expense), Net Provision for loan losses Provision for Loan and Lease Losses Net interest income after provision for loan losses Interest Income (Expense), after Provision for Loan Loss Noninterest income: Noninterest Income [Abstract] Indirect lending activities Indirect Lending Activities Indirect lending activities SBA lending activities SBA Lending Activities SBA lending activities Trust and wealth management fees Trust And Investment Income Management Revenue Trust And Investment Income Management Revenue Other Noninterest Income, Other Operating Income Noninterest expense: Noninterest Expense [Abstract] Salaries and employee benefits Labor and Related Expense Commissions Sales Commissions and Fees Occupancy and equipment Occupancy, Net Professional and other services Professional Fees Other Other Noninterest Expense Total noninterest expense Noninterest Expense Income before income tax expense Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest Income tax expense Income Tax Expense (Benefit) Net income Earnings per common share: Other comprehensive income/(loss), net of tax: Other Comprehensive Income (Loss), Net of Tax [Abstract] Change in net unrealized gains/(losses) on available-for-sale debt securities, net of tax effect of $1,217 and ($365), respectively Other Comprehensive Income (Loss), Securities, Available-for-Sale, Unrealized Holding Gain (Loss) Arising During Period, after Tax Total 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 Derivative Positions Schedule of Notional Amounts of Outstanding Derivative Positions [Table Text Block] Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Preferred Stock Preferred Stock [Member] Common Stock Common Stock [Member] Accumulated Other Comprehensive Income/(Loss), Net of Tax AOCI Attributable to Parent [Member] Retained Earnings Retained Earnings [Member] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Beginning balance (in shares) Shares, Outstanding Beginning balance Net income Impact of adoption of new accounting standard Tax Cuts And Jobs Act Of 2017, Reclassification From AOCI To Retained Earnings, Tax Effect Tax Cuts And Jobs Act Of 2017, Reclassification From AOCI To Retained Earnings, Tax Effect Impact of adoption of new accounting standard Cumulative Effect of New Accounting Principle in Period of Adoption Other comprehensive income, net of tax Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Total comprehensive income Common stock issued under various employee plans, net (in shares) Stock Issued During Period, Shares, Common Stock Issued Under Various Employee Plans Stock Issued During Period, Shares, Common Stock Issued Under Various Employee Plans Common stock issued under various employee plans, net Stock Issued During Period, Value, Common Stock Issued Under Various Employee Plans Stock Issued During Period, Value, Common Stock Issued Under Various Employee Plans Common stock declared cash dividends, $0.12 per share Dividends, Common Stock, Cash Ending balance (in shares) Ending balance Public deposits Pledged Financial Instruments, Not Separately Reported, Securities for Other Debt Facilities Securities sold under repurchase agreements Pledged Financial Instruments, Not Separately Reported, Securities for Repurchase Agreements Total pledged securities Pledged Financial Instruments, Not Separately Reported, Securities Loans Outstanding, by Class Loans Outstanding by Class [Table Text Block] Loans outstanding by class. Loans in Nonaccrual Status, by Class Schedule of Financing Receivables, Non Accrual Status [Table Text Block] Accruing Delinquent Loans and Troubled Debt Restructurings Loans Delinquent and Troubled Debt Restructured Loans Accruing Interest [Table Text Block] Loans delinquent and troubled debt restructured loans accruing interest. Loans Held-for-Investment Pledged as Collateral Schedule of Financing Receivables Pledged as Collateral [Table Text Block] Schedule of Financing Receivables Pledged as Collateral [Table Text Block] Impaired Legacy Loans and Acquired Non-PCI Loans Impaired Financing Receivables [Table Text Block] Average Recorded Investment in Impaired Loans and Interest Income Average Impaired Loans and Interest Income Recognized [Table Text Block] Average impaired loans and interest income recognized. Recorded Investment in Loans, by Loan Class and Risk Category Financing Receivable Credit Quality Indicators [Table Text Block] Changes in Expected Income from PCI Loans Schedule of Purchase Credit Impaired Loans Receivable, Reconciliation of Income Expected [Table Text Block] Schedule of Purchase Credit Impaired Loans Receivable, Reconciliation of Income Expected [Table Text Block] Schedule of Receivables with Imputed Interest Schedule of Receivables with Imputed Interest [Table] Indirect Automobile Automobile Loan [Member] Receivables with Imputed Interest [Line Items] Receivables with Imputed Interest [Line Items] Average Recorded Investment Impaired Financing Receivable, Average Recorded Investment Interest Income Recognized Impaired Financing Receivable, Interest Income, Accrual Method Basis of Consolidation Consolidation, Subsidiaries or Other Investments, Consolidated Entities, Policy [Policy Text Block] Basis of Accounting Basis of Accounting, Policy [Policy Text Block] Use of Estimates Use of Estimates, Policy [Policy Text Block] Contingencies Commitments and Contingencies, Policy [Policy Text Block] Accounting Changes and Recent Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Loans Held-for-Sale Loans Held-for-Sale Disclosure [Text Block] Loans Held-for-Sale Disclosure[Text Block] Subsequent Event Subsequent Events [Text Block] Real Estate, Type of Property [Axis] Real Estate, Type of Property [Axis] Real Estate [Domain] Real Estate [Domain] Commercial Commercial Real Estate [Member] Residential Residential Real Estate [Member] Undeveloped property Land [Member] Total ORE, net Loans Loans, Notes, Trade and Other Receivables Disclosure [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 used in operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Depreciation and amortization of premises and equipment Depreciation, Depletion and Amortization, Nonproduction Amortization of FDIC indemnification asset, net FDIC Indemnification Asset, Amortization FDIC Indemnification Asset, Amortization Accretion of purchase discounts or premiums, net Accretion (Amortization) of Discounts and Premiums, Investments Other amortization Amortization of Other Deferred Charges Impairment of other real estate Impairment of Real Estate Amortization and impairment of servicing rights, net Amortization of operating lease right-of-use assets Operating Lease, Right-Of-Use Asset, Amortization Operating Lease, Right-Of-Use Asset, Amortization Share-based compensation expense Share-based Compensation Postretirement benefits, net Pension and Other Postretirement Benefits Cost (Reversal of Cost) Gains on loan sales, including origination/sale of servicing rights Gain on Sale of Loans, Including Servicing Rights Origination Gain on Sale of Loans, Including Servicing Rights Origination Net loss on sales of other real estate Gains (Losses) on Sales of Other Real Estate Income on bank owned life insurance Life Insurance, Corporate or Bank Owned, Change in Value Net change in deferred income tax Increase (Decrease) in Deferred Income Taxes Net change in fair value of loans held-for-sale Fair Value, Option, Changes in Fair Value, Gain (Loss) Originations of loans held-for-sale Payments for Origination and Purchases of Loans Held-for-sale Proceeds from sales of loans held-for-sale Proceeds from Sale of Loans Held-for-sale Net payments paid to FDIC under loss-share agreements FDIC Indemnification Asset, Period Increase (Decrease) Decrease in other assets Increase (Decrease) in Other Operating Assets (Decrease) increase in other liabilities Increase (Decrease) in Other Operating Liabilities Net cash used in operating activities Net Cash Provided by (Used in) Operating Activities Cash flows from investing activities: Net Cash Provided by (Used in) Investing Activities [Abstract] Purchases of investment securities available-for-sale Payments to Acquire Debt Securities, Available-for-sale Maturities, calls, and repayment of investment securities available-for-sale Proceeds from Maturities, Prepayments and Calls of Debt Securities, Available-for-sale Maturities, calls and repayment of investment securities held-to-maturity Proceeds from Maturities, Prepayments and Calls of Held-to-maturity Securities Purchases of FHLB stock Payments to Acquire Federal Home Loan Bank Stock Redemption of FHLB stock Proceeds from Sale of Federal Home Loan Bank Stock Net decrease (increase) in loans Payments for (Proceeds from) Loans and Leases Proceeds from sales of other real estate Proceeds from Sale of Other Real Estate Purchases of premises and equipment Payments to Acquire Property, Plant, and Equipment Net cash used in investing activities Net Cash Provided by (Used in) Investing Activities Cash flows from financing activities: Net Cash Provided by (Used in) Financing Activities [Abstract] Net (decrease) increase in noninterest-bearing deposits Net Change Noninterest-bearing Deposits, Domestic Net increase in interest-bearing deposits Net Change Interest-bearing Deposits, Domestic Net decrease in other short-term borrowings Repayments of Other Short-term Debt Proceeds from FHLB advances Proceeds from FHLBank Borrowings, Financing Activities Repayments on FHLB advances Payments of FHLBank Borrowings, Financing Activities Proceeds from the issuance of common stock, net Proceeds from Issuance of Common Stock Cash dividends paid on common stock Payments of Ordinary Dividends, Common Stock Net cash provided by financing activities Net Cash Provided by (Used in) Financing Activities Net (decrease) increase in cash and cash equivalents Cash and Cash Equivalents, Period Increase (Decrease) Cash and cash equivalents, beginning of period Cash and cash equivalents, end of period Supplemental cash flow information and non-cash disclosures: Supplemental Cash Flow Information [Abstract] Cash paid during the period for: Cash Paid Refunded During Period for [Abstract] Cash paid during the period. Interest on deposits and borrowings Interest Paid, Excluding Capitalized Interest, Operating Activities Income taxes Income Taxes Paid Transfers of loans from held-for-sale to held for investment Transfer of Loans Held-for-sale to Portfolio Loans Transfers of loans to other real estate Real Estate Owned, Transfer to Real Estate Owned Initial recognition of operating lease right-of-use assets Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Initial recognition of operating lease liabilities Operating Lease Liability, Initial Recognition Operating Lease Liability, Initial Recognition Residential Mortgage Servicing Rights Types of Residential Mortgages [Axis] Types of Residential Mortgages [Axis] Types of Residential Mortgages [Axis] Types of Residential Mortgages [Domain] Types of Residential Mortgages [Domain] Types of Residential Mortgages [Domain] Fixed-rate Fixed Rate Residential Mortgage [Member] Adjustable-rate Adjustable Rate Residential Mortgage [Member] Assumptions and estimates in determining the impairment of capitalized MSRs Assumptions And Estimates In Determining Impairment Of Capitalized Mortgage Servicing Rights [Abstract] Assumptions and estimates in determining the impairment of capitalized Mortgage Servicing Rights. Fair Value Modeled prepayment speed (as a percent) Revenue Recognition Revenue from Contract with Customer [Text Block] New Accounting Pronouncements or Change in Accounting Principle [Table] New Accounting Pronouncements or Change in Accounting Principle [Table] Adjustments for New Accounting Pronouncements [Axis] Adjustments for New Accounting Pronouncements [Axis] Type of Adoption [Domain] Type of Adoption [Domain] Accounting Standards Update 2016-02 Accounting Standards Update 2016-02 [Member] New Accounting Pronouncements or Change in Accounting Principle [Line Items] New Accounting Pronouncements or Change in Accounting Principle [Line Items] Number of subsidiaries Number of Trust Preferred Subsidiaries Number of Trust Preferred Subsidiaries Number of business segments Number of Operating Segments Merger, share exchange ratio Merger, Share Exchange Ratio Merger, Share Exchange Ratio Merger, par value per share (in dollars per share) Merger, Par Value Per Share Merger, Par Value Per Share Potential merger termination fee Potential Merger Termination Fee Potential Merger Termination Fee Tax Cuts and Jobs Act of 2017, income tax expense (benefit) Tax Cuts And Jobs Act Of 2017, Income Tax Expense (Benefit) Tax Cuts and Jobs Act of 2017, Income Tax Expense (Benefit) Right-of-use asset - operating leases Operating Lease, Right-of-Use Asset Lease liability - operating leases Operating Lease, Liability Weighted average remaining lease term Operating Lease, Weighted Average Remaining Lease Term Weighted average discount rate, percent Operating Lease, Weighted Average Discount Rate, Percent Loans held-for-sale Difference Between Aggregate Fair Value And Aggregate Unpaid Principal Balance [Abstract] Difference between the aggregate fair value and the aggregate unpaid principal balance. Period for difference between aggregate fair value and aggregate unpaid principal balance of loans that are due past by (days) Period For Difference Between Aggregate Fair Value And Aggregate Unpaid Principal Balance Of Loans That Are Due Past By Period for difference between aggregate fair value and the aggregate unpaid principal balance of loans that are due past by. Loans held-for-sale, aggregate fair value Loans held-for-sale, aggregate unpaid principal balance under FVO Loans Held-for-Sale as Assets Aggregate Unpaid Principal Loans Held-for-sale as assets aggregate unpaid principal. Loans held-for-sale, aggregate fair value over unpaid principal Fair Value, Option, Loans Held as Assets, Aggregate Difference Net fair value (losses)/gains related to mortgage banking activities Fair Value of Gain (Loss) Related to Mortgage Banking Activities Fair Value of Gain (Loss) Related to Mortgage Banking Activities Schedule of Financing Receivables Past Due [Table] Schedule of Financing Receivables Past Due [Table] Financing Receivable, Recorded Investment, Past Due [Line Items] Financing Receivable, Recorded Investment, Past Due [Line Items] Unamortized loan costs Unamortized Loan Commitment and Origination Fees and Unamortized Discounts or Premiums Loans and leases receivable, related parties Loans and Leases Receivable, Related Parties Impaired financing receivable, expected interest income on full accrual basis Impaired Financing Receivable, Expected Interest Income on Full Accrual Basis Impaired Financing Receivable, Expected Interest Income on Full Accrual Basis Repurchased loans Financing Receivable, Recorded Investment, Nonaccrual Status Loans pledged to FRB Pledged Financial Instruments, Not Separately Reported, Loans Receivable Pledged as Collateral Weighted average FICO score for the indirect loan portfolio (as a score) Indirect Loan Portfolio Score Score For Indirect Loan Portfolio Carrying amount of PCI loans Purchase Credit Impaired Loans Receivable, Carrying Amount Purchase Credit Impaired Loans Receivable, Carrying Amount Outstanding balance of PCI loans Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance Derivative Financial Instruments Derivative Instruments and Hedging Activities Disclosure [Text Block] Total nonaccrual loans Other Real Estate Real Estate Owned [Text Block] Fixed-rate Fixed-rate Indirect Servicing Loan [Member] Fixed-rate Indirect Servicing Loan [Member] Adjustable-rate Adjustable-rate Indirect Servicing Loan [Member] Adjustable-rate Indirect Servicing Loan [Member] Fair value Measurement Input Type [Axis] Measurement Input Type [Axis] Measurement Input Type [Domain] Measurement Input Type [Domain] Measurement Input, Discount Rate Measurement Input, Discount Rate [Member] Measurement Input, Prepayment Rate Measurement Input, Prepayment Rate [Member] Impaired loans Impaired Loans [Member] Impaired loans. Other real estate Other Real Estate [Member] Other real estate. Residential mortgage servicing rights Mortgage Servicing Rights [Member] Mortgage servicing rights. IRLCs Forward commitments Forward Commitments [Member] Forward Commitments [Member] Valuation Approach and Technique [Axis] Valuation Approach and Technique [Axis] Valuation Approach and Technique [Domain] Valuation Approach and Technique [Domain] Discounted Appraisals Discounted Appraisals [Member] Discounted appraisals. Discounted Cash Flows Valuation Technique, Discounted Cash Flow [Member] Pricing Model Pricing Model Valuation Technique [Member] Pricing Model Valuation Technique [Member] Investor Pricing Investor Pricing Valuation Technique [Member] Investor Pricing Valuation Technique [Member] Minimum Minimum [Member] Maximum Maximum [Member] Significant unobservable inputs used in the fair value measurement of level 3 assets and liabilities Fair Value Assets Measured On Nonrecurring Basis Unobservable Inputs [Abstract] Fair value assets measured on nonrecurring basis unobservable inputs. Impaired loans Other real estate Residential mortgage servicing rights IRLCs Forward commitments Forward Commitments, Fair Value Disclosure Forward Commitments, Fair Value Disclosure Unobservable inputs, estimated selling costs (as a percent) Unobservable Inputs, Estimated Selling Costs Unobservable Inputs, Estimated Selling Costs Servicing asset, measurement input (as a percent) Servicing Asset, Measurement Input Unobservable inputs, pull-through rate (as a percent) Fair Value Inputs, Pull Through Rate Fair Value Inputs, Pull Through Rate Unobservable inputs, pricing spreads (as a percent) Fair Value Inputs, Pricing Spreads Fair Value Inputs, Pricing Spreads Schedule of Financing Receivable, Recorded Investment, Credit Quality Indicator [Table] Schedule of Financing Receivable, Recorded Investment, Credit Quality Indicator [Table] Internal Credit Assessment [Axis] Internal Credit Assessment [Axis] Internal Credit Assessment [Domain] Internal Credit Assessment [Domain] Graded Loans Graded Loans [Member] Graded Loans [Member] Pass Pass [Member] Special Mention Special Mention [Member] Substandard Substandard [Member] Ungraded Performing Ungraded Performing [Member] Ungraded Performing [Member] Financing Receivable, Recorded Investment [Line Items] Financing Receivable, Recorded Investment [Line Items] Schedule of Financing Receivable, Allowance for Credit Losses [Table] Schedule of Financing Receivable, Allowance for Credit Losses [Table] Credit Loss Status [Axis] Credit Loss Status [Axis] Credit Loss Status [Domain] Credit Loss Status [Domain] Financial Asset Acquired with Credit Deterioration Financial Asset Acquired with Credit Deterioration [Member] Financing Receivable, Allowance for Credit Losses [Line Items] Financing Receivable, Allowance for Credit Losses [Line Items] Individually evaluated Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment Collectively evaluated Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment Total ALL Financing Receivable, Allowance for Credit Losses Individually evaluated Financing Receivable, Individually Evaluated for Impairment Collectively evaluated Financing Receivable, Collectively Evaluated for Impairment Total loans Loan Type, Classification [Axis] Loan Type, Classification [Axis] Loan Type, Classification [Axis] Loan Type, Classification [Domain] Loan Type, Classification [Domain] [Domain] for Loan Type, Classification [Axis] Legacy Legacy [Member] Legacy. Acquired Acquired Loans [Member] Acquired Loans [Member] Fair Value of Financial Instruments Fair Value Disclosures [Text Block] Financing Receivables, Period Past Due [Axis] Financing Receivables, Period Past Due [Axis] Financing Receivables, Period Past Due [Domain] Financing Receivables, Period Past Due [Domain] Financing Receivables, 30 to 89 Days Past Due Financing Receivables, Equal to Greater than 90 Days Past Due Financing Receivables, Equal to Greater than 90 Days Past Due [Member] Past due accruing loans Financing Receivable, Recorded Investment, Past Due TDRs Accruing Troubled Debt Restructured Loans Accruing Troubled debt restructured loans accruing. Unallocated Financing Receivables Unallocated Financing Receivables [Member] Financing Receivable, Allowance for Credit Losses [Roll Forward] Financing Receivable, Allowance for Credit Losses [Roll Forward] Beginning balance Charge-offs Financing Receivable, Allowance for Credit Losses, Write-downs Recoveries Financing Receivable, Allowance for Credit Losses, Recovery Net recoveries / (charge-offs) Financing Receivable Allowance for Credit Losses Net Write Offs Financing receivable allowance for credit losses net write Offs. Provision for loan losses Provision for Loan, Lease, and Other Losses Ending balance Servicing rights