Due in 1 year or less Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, Year One Business Acquisition [Axis] Business Acquisition [Axis] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Total undiscounted cash flows Lessee, Operating Lease, Liability, to be Paid C&I C&I [Member] C&I [Member] Financial Standby Letter of Credit Financial Standby Letter of Credit [Member] Entity Address, Postal Zip Code Entity Address, Postal Zip Code Amortization expense, next rolling twelve months Finite-Lived Intangible Assets, Amortization Expense, Next Rolling 12 Months Percentage of Total Loans Held for Investment Financing Receivable, Excluding Accrued Interest, Modified in Period, to Total Financing Receivables, Percentage Financing Receivable, Excluding Accrued Interest, Modified in Period, to Total Financing Receivables, Percentage Participating Mortgage Loans [Table] Participating Mortgage Loans [Table] Cash dividends paid Payments of Ordinary Dividends, Common Stock Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] Net decrease (increase) in loans Payments for (Proceeds from) Loans and Leases Faith-based: Faith-Based Real Estate [Member] Faith-Based Real Estate Due after 5 years through 10 years Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 5 Through 10 Fair Value Measurement [Domain] Fair Value Measurement [Domain] Financial Instruments [Domain] Financial Instruments [Domain] Financial Asset, Aging [Domain] Financial Asset, Aging [Domain] Statistical Measurement [Domain] Statistical Measurement [Domain] Depreciation Depreciation Class of Financing Receivable [Domain] Class of Financing Receivable [Domain] Operating lease, weighted average discount rate, percent Operating Lease, Weighted Average Discount Rate, Percent Interest on deposits Interest Expense, Deposits Share-based Payment Arrangement [Abstract] Share-Based Payment Arrangement [Abstract] Additional paid-in capital Additional Paid in Capital, Common Stock Net periodic cost (benefit) Net periodic pension (benefit) cost Defined Benefit Plan, Net Periodic Benefit Cost (Credit) Nonperforming Loans Subject To Special Monitoring Nonperforming Loans Subject To Special Monitoring [Member] Nonperforming Loans Subject To Special Monitoring [Member] Purchase of common shares Treasury Stock, Value, Acquired, Cost Method Net income Net income Net Income Net Income (Loss) Attributable to Parent Measurement Input Type [Domain] Measurement Input Type [Domain] Due after 1 year through 5 years Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year One Through Five Other Other Intangible Assets [Member] Net amortization Defined Benefit Plan, Amortization of Prior Service Cost (Credit) Equity Components [Domain] Equity Component [Domain] Scenario [Axis] Scenario [Axis] Total Assets, Fair Value Disclosure Leases Lessee, Operating Leases [Text Block] State and political subdivisions US States and Political Subdivisions Debt Securities [Member] Common shares in treasury, at cost (1,793,679 shares at March 31, 2023 and 1,836,116 shares at December 31, 2022) Treasury Stock, Common, Value Plan Name [Axis] Plan Name [Axis] Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration] Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration] Supplemental information: Supplemental Cash Flow Information [Abstract] Plan Name [Domain] Plan Name [Domain] Less than 1 year Lessee, Operating Lease, Liability, to be Paid, Remainder of Fiscal Year Interest on federal funds sold and other short-term investments Interest on federal funds sold and other short-term investments Interest income on federal funds sold and other short-term investments. Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Common Stock, Value, Outstanding Common Stock, Value, Outstanding Entity Address, State or Province Entity Address, State or Province Award Type [Axis] Award Type [Axis] Net cash provided by operating activities Net Cash Provided by (Used in) Operating Activities Accrued interest payable Accrued Liabilities, Fair Value Disclosure Schedule of Investment Securities Debt Securities, Available-for-Sale [Table Text Block] Schedule of Restricted Stock Activity Share-Based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity [Table Text Block] Performing Loans Subject To Special Monitoring Performing Loans Subject To Special Monitoring [Member] Performing Loans Subject To Special Monitoring [Member] Other liabilities Other Liabilities Supplemental Employee Retirement Plan Supplemental Employee Retirement Plan [Member] Receivables [Abstract] Receivables [Abstract] Less: Allowance for credit losses Beginning balance Ending balance Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest Total fee revenue and other income Fee income Noninterest Income Loans by Type Loans, Notes, Trade and Other Receivables Disclosure [Text Block] Total liabilities Liabilities Operating lease, weighted average remaining lease term Operating Lease, Weighted Average Remaining Lease Term Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] Cash Flows From Investing Activities: Net Cash Provided by (Used in) Investing Activities [Abstract] Schedule of Expected Benefit Payments Schedule of Expected Benefit Payments [Table Text Block] Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Total deposits Deposits Investment in bank-owned life insurance Bank Owned Life Insurance Processing fees Processing Fees [Member] Processing Fees Preferred stock, shares issued (in shares) Preferred Stock, Shares Issued Document Type Document Type Financial Asset, Aging [Axis] Financial Asset, Aging [Axis] Financing Receivable, Past Due [Table] Financing Receivable, Past Due [Table] Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Beginning balance (in dollars per share) Ending balance (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Segments [Axis] Segments [Axis] Product and Service [Domain] Product and Service [Domain] Entity Shell Company Entity Shell Company Information services payment and processing revenue Information Services [Member] Information Services [Member] 1-2 years Lessee, Operating Lease, Liability, to be Paid, Year One Financial Instrument [Axis] Financial Instrument [Axis] 90 Days and Over Financial Asset, Equal to or Greater than 90 Days Past Due [Member] Consolidation Items [Domain] Consolidation Items [Domain] Nonemployee Share-Based Payment Arrangement, Nonemployee [Member] Document Period End Date Document Period End Date Loans Excluding Unfunded Commitments Loans Excluding Unfunded Commitments [Member] Loans Excluding Unfunded Commitments Accounts and drafts payable Accounts Payable, Fair Value Disclosure Non- accrual Financing Receivable, Excluding Accrued Interest, Nonaccrual Tax-equivalized pre-tax income Income (Loss) from Continuing Operations Including Tax Equivalent Adjustment, Before Income Taxes, Noncontrolling Interest Income (Loss) from Continuing Operations Including Tax Equivalent Adjustment, Before Income Taxes, Noncontrolling Interest Total assets Total assets Assets Earnings Per Share [Abstract] Earnings Per Share [Abstract] Contributions Defined Benefit Plan, Plan Assets, Contributions by Employer Net unrealized gain (loss) on securities available-for-sale OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment and Tax Performance-based Restricted Stock Performance Shares [Member] Net cash used in financing activities Net Cash Provided by (Used in) Financing Activities Variable lease, cost Variable Lease, Cost Asset backed securities issued or guaranteed by U.S. government agencies or sponsored enterprises Asset-Backed Securities [Member] Income before income tax expense Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Shareholders’ Equity: Stockholders' Equity Attributable to Parent [Abstract] Segments [Domain] Segments [Domain] Bank service fees Bank Service Fees [Member] Bank Service Fees Earnings Per Share Earnings Per Share [Text Block] Due after 1 year through 5 years Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year One Through Five Interest cost on projected benefit obligation Defined Benefit Plan, Interest Cost Credit Exposure Of Loan Portfolio [Domain] CreditExposureOfLoanPortfolio [Domain] CreditExposureOfLoanPortfolio Goodwill, gross carrying amount Goodwill, Gross Tax effect OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment, Tax Award Type [Domain] Award Type [Domain] Grantee Status [Axis] Grantee Status [Axis] Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss AFS, Total Unrealized Losses Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss Unrecognized compensation expense, period for recognition Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition Schedule of Fair Value Measurements by Balance Sheet Grouping Fair Value, by Balance Sheet Grouping [Table Text Block] Unamortized intangible assets: Unamortized intangible assets: Unamortized Intangible Asset Entity Registrant Name Entity Registrant Name Subsequent Events Subsequent Events [Text Block] Mortgage Mortgages [Member] Loans, net Financing Receivable, Excluding Accrued Interest, after Allowance for Credit Loss Patents Patents [Member] Combination Term Extension and Interest Rate Reduction Extended Maturity and Interest Rate Reduction [Member] Extended Maturity and Interest Rate Reduction Entity Address, City or Town Entity Address, City or Town Defined Pension Plans Retirement Benefits [Text Block] Interest Income: Interest and Dividend Income, Operating [Abstract] Commercial: Commercial Real Estate [Member] Leases [Abstract] Leases [Abstract] Employee Share-Based Payment Arrangement, Employee [Member] Other income (out-of-scope of FASB ASC 606) Revenue Not from Contract with Customer Stock Repurchases Treasury Stock [Text Block] Minimum Minimum [Member] Due in 1 year or less Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, Year One Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Entity Emerging Growth Company Entity Emerging Growth Company Occupancy Occupancy, Net Common stock, par or stated value per share (in dollars per share) Common Stock, Par or Stated Value Per Share Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Summary of ACL by Category Summary of Allowance For Credit Loss by Category [Table Text Block] Summary of ACL by Category. Treasury Stock Treasury Stock, Common [Member] Pension Plan Pension Plan [Member] Fair Value of Financial Instruments Fair Value Disclosures [Text Block] Number of loans individually evaluated for impairment Number Of Loans Individually Evaluated for Impairment Number Of Loans Individually Evaluated for Impairment Trading Symbol Trading Symbol Entity File Number Entity File Number Treasury stock shares (in shares) Treasury Stock, Common, Shares Marketable Securities [Line Items] Marketable Securities [Line Items] Amortization expense, rolling year three Finite-Lived Intangible Assets, Amortization Expense, Rolling Year Three Granted (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period Effective income tax rate reconciliation, percent Effective Income Tax Rate Reconciliation, Percent Exercised (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Exercised Loans Total Loans Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss Cash and cash equivalents Cash and Cash Equivalents, Fair Value Disclosure Other comprehensive income (loss): Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract] (Release of) provision for credit losses Financing Receivable, Excluding Accrued Interest, Credit Loss Expense (Reversal) Subsequent Events [Abstract] Subsequent Events [Abstract] Increase (decrease) in pension liability Increase (Decrease) in Obligation, Pension Benefits Total net revenue Revenues Available-for-sale securities, number of positions, greater than one year Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions Investments in Securities Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] Participating Mortgage Loans [Line Items] Participating Mortgage Loans [Line Items] Income Taxes Income Tax Disclosure [Text Block] Unused loan commitments Unused Commitments to Extend Credit Aggregate intrinsic value Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Outstanding AFS, 12 months or more, Estimated Fair Value Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer Operating Expense: Noninterest Expense [Abstract] Amortization of intangible assets Amortization of Intangible Assets Cash paid for interest Interest Paid, Excluding Capitalized Interest, Operating Activities Basic earnings per share (in dollars per share) Earnings Per Share, Basic 3-4 years Lessee, Operating Lease, Liability, to be Paid, Year Three Defined Benefit Plan Disclosure [Line Items] Defined Benefit Plan Disclosure [Line Items] Amortized Cost Debt Securities, Available-for-Sale, Amortized Cost, Excluding Accrued Interest, after Allowance for Credit Loss CRE CRE [Member] CRE [Member] Term Extension Extended Maturity [Member] Total shareholders’ equity Beginning balance Ending balance Stockholders' Equity Attributable to Parent Due after 5 years through 10 years Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year 5 Through 10 Forfeitures (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Financing Receivable Portfolio Segment [Domain] Financing Receivable Portfolio Segment [Domain] Financing Receivable, Past Due [Line Items] Financing Receivable, Past Due [Line Items] Revenue, Performance Obligation [Abstract] Revenue, Performance Obligation [Abstract] Entity Interactive Data Current Entity Interactive Data Current Fair Value, by Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping [Table] Accumulated Amortization Total intangible assets, accumulated amortization Finite-Lived Intangible Assets, Accumulated Amortization Mortgage-backed securities issued or guaranteed by U.S. government agencies or sponsored enterprises US Government-sponsored Enterprises Debt Securities [Member] Proceeds from sales of securities available-for-sale Proceeds from Sale of Debt Securities, Available-for-Sale Portion at Fair Value Measurement Portion at Fair Value Measurement [Member] Retained Earnings Retained Earnings [Member] Deposits Deposits, Fair Value Disclosure Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Cash dividends Dividends, Common Stock, Cash Net increase (decrease) in cash and cash equivalents Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect Common Stock Common Stock [Member] Over 5 years Lessee, Operating Lease, Liability, to be Paid, Due after Year Four Lessee, Operating Lease, Liability, to be Paid, Due after Year Four Issuance of common shares pursuant to stock-based compensation plan, net Shares Issued, Value, Share-Based Payment Arrangement, after Forfeiture Number of reportable segments Number of Reportable Segments Purchase of common shares for treasury Payments for Repurchase of Common Stock Statement [Table] Statement [Table] Cash and cash equivalents Cash, Cash Equivalents, and Short-Term Investments Vested (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Faith-based CRE Faith-based CRE [Member] Faith-based CRE [Member] Document Quarterly Report Document Quarterly Report Statistical Measurement [Axis] Statistical Measurement [Axis] Treasury stock, shares repurchased (in shares) Treasury Stock, Shares, Acquired Grantee Status [Domain] Grantee Status [Domain] Retained earnings Retained Earnings (Accumulated Deficit) Due after 10 years Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year 10 Other operating activities, net Other Operating Activities, Cash Flow Statement Schedule of Finite-Lived Intangible Assets [Table] Schedule of Finite-Lived Intangible Assets [Table] Equity Components [Axis] Equity Components [Axis] Scenario [Domain] Scenario [Domain] AFS, Less than 12 months, Estimated Fair Value Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months Percentage of target opportunity for awards to vest Percentage of target opportunity for awards to vest Percentage of target opportunity for awards to vest. Tax effect Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax Document Fiscal Year Focus Document Fiscal Year Focus Cash Flows From Operating Activities: Net Cash Provided by (Used in) Operating Activities [Abstract] Available-for-sale securities, percentage of total securities Available-for-sale, Securities in Unrealized Loss Positions, Percentage Of Total Securities The percentage of the number of investment positions in the available-for-sale investments determined to be temporarily impaired. Statement [Line Items] Statement [Line Items] Nonvested awards shares outstanding (in shares) Beginning balance (in shares) Ending balance (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number Gross Carrying Amount Finite-Lived Intangible Assets, Gross Loss Contingencies [Table] Loss Contingencies [Table] Operating lease, right-of-use asset Operating Lease, Right-of-Use Asset Gross Unrealized Losses Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax Accumulated Other Comprehensive Loss AOCI Attributable to Parent [Member] Financing Receivable Portfolio Segment [Axis] Financing Receivable Portfolio Segment [Axis] Reclassification adjustments for gains included in net income Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, before Tax Document Transition Report Document Transition Report Other Other Loan [Member] Other Loan Local Phone Number Local Phone Number Financing Receivable, Allowance for Credit Loss [Line Items] Financing Receivable, Allowance for Credit Loss [Line Items] Tax equivalent adjustment Income Tax Effects Allocated Directly to Equity, Prior Period Adjustment Common stock, shares, outstanding (in shares) Common Stock, Shares, Outstanding Goodwill Goodwill Amortization expense, rolling year two Finite-Lived Intangible Assets, Amortization Expense, Rolling Year Two Total Liabilities, Fair Value Disclosure Purchase of common shares (in shares) Stock Repurchased During Period, Shares Payments in advance of funding Payments In Advance Of Funding The normal cycle for payment of Transportation invoices to a carrier, on behalf of the company's customer, is: the customer provides the funds to the company prior to the payment of the invoice by the company to the carrier. Payments in excess of funding are generated when, according to a service agreement with a few selected carriers, the company pays the carrier prior to receipt of the funds from the customer. The company receives a fee from the carrier for making this accelerated payment. Interest Income (Expense), after Provision for Loan Loss [Abstract] Interest Income (Expense), after Provision for Loan Loss [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] Intangible Assets Goodwill and Intangible Assets Disclosure [Text Block] Income tax expense Income Tax Expense (Benefit) Preferred stock, par or stated value per share (in dollars per share) Preferred Stock, Par or Stated Value Per Share 4-5 years Lessee, Operating Lease, Liability, to be Paid, Year Four Income Statement [Abstract] Income Statement [Abstract] Additional Paid-in Capital Additional Paid-in Capital [Member] Document Fiscal Period Focus Document Fiscal Period Focus Modified loans Financing Receivable, Excluding Accrued Interest, Modified in Period, Amount Financing Receivable, Excluding Accrued Interest, Modified in Period, Amount Basic Earnings Per Share, Basic [Abstract] Weighted-average common shares outstanding assuming dilution (in shares) Weighted Average Number of Shares Outstanding, Diluted Loss Contingency, Nature [Domain] Loss Contingency, Nature [Domain] Loss Contingencies [Line Items] Loss Contingencies [Line Items] Interest and fees on loans Interest and Fee Income, Loans and Leases Cash dividends (in dollars per share) Common Stock, Dividends, Per Share, Cash Paid Carrying Amount Reported Value Measurement [Member] Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] Banking Services Banking Services [Member] Banking Services [Member] Summary of Loan Categories Summary of Loan Categories [Table Text Block] Tabular disclosure for loan categories. Granted (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Operating Segments Operating Segments [Member] Receivables from Customers Receivables from Customers Short-term lease, cost Short-Term Lease, Cost Preferred stock, shares authorized (in shares) Preferred Stock, Shares Authorized Accrued interest receivable Accrued Interest Receivable, Fair Value Disclosure Accrued Interest Receivable, Fair Value Disclosure Cash and cash equivalents at beginning of period Cash and cash equivalents at end of period Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents Foreign currency translation adjustments Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax Loan Restructuring Modification [Axis] Loan Restructuring Modification [Axis] Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Schedule of Performance Shares Activity Share-Based Payment Arrangement, Performance Shares, Outstanding Activity [Table Text Block] Common stock, shares, issued (in shares) Common Stock, Shares, Issued Schedule of Unrealized Loss on Investments Unrealized Gain (Loss) on Investments [Table Text Block] Financing Receivable, Troubled Debt Restructuring Financing Receivable, Troubled Debt Restructuring [Table Text Block] Retirement Plan Type [Domain] Retirement Plan Type [Domain] Outstanding, average remaining contractual term (in years) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Outstanding, Weighted Average Remaining Contractual Terms Available-for-sale securities, number of positions Debt Securities, Available-for-Sale, Unrealized Loss Position, Number of Positions Debt Securities, Available-for-sale, Unrealized Loss Position AFS, Total Estimated Fair Value Debt Securities, Available-for-Sale, Unrealized Loss Position Amendment Flag Amendment Flag Finite-lived intangible asset, useful life Finite-Lived Intangible Asset, Useful Life Net cash provided by (used in) investing activities Net Cash Provided by (Used in) Investing Activities Operating lease, cost Operating Lease, Cost Other comprehensive income (loss) Other Comprehensive Income (Loss), Net of Tax Total comprehensive income (loss) Comprehensive Income (Loss), Net of Tax, Attributable to Parent Schedule of Segment Reporting Information, by Segment Schedule of Segment Reporting Information, by Segment [Table Text Block] Gross Unrealized Gains Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax Entity Current Reporting Status Entity Current Reporting Status Goodwill and Intangible Assets Disclosure [Abstract] Goodwill and Intangible Assets Disclosure [Abstract] Decrease (increase) in payments in advance of funding Decrease (Increase) In Payments In Advance Of Funding Net change during the reporting period in the carrying amount of payments in advance of funding. Schedule of Stock Appreciation Right Activity Share-Based Payment Arrangement, Stock Appreciation Right, Activity [Table Text Block] Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Corporate, Eliminations and Other Corporate, Reconciling Items, And Eliminations [Member] Corporate, Reconciling Items, And Eliminations Securities available-for-sale, at fair value Fair Value Total Investment securities Debt Securities, Available-for-Sale, Excluding Accrued Interest Total interest income Interest and Dividend Income, Operating Accounts and drafts payable Accounts and drafts payable Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business and includes carrying value of amounts due on drafts payable on the balance sheet date. 30-59 Days Financial Asset, 30 to 59 Days Past Due [Member] Total intangible assets, net Intangible Assets, Net (Including Goodwill) Purchase of bank-owned life insurance Payment to Acquire Life Insurance Policy, Investing Activities Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward] Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward] Liabilities: Liabilities [Abstract] Premises and equipment, net Property, Plant and Equipment, Net Lease payments due Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract] Assets eligible for amortization: Amortization [Abstract] Personnel Labor and Related Expense Stand by Letters Of Credit Member Stand by Letters Of Credit Member [Member] Stand by Letters Of Credit Member Schedule of Finite-Lived Intangible Assets, Future Amortization Expense Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] Total loans Financing Receivable, Excluding Accrued Interest, after Allowance for Credit Loss, Current Exercise of SARs Stock Issued During Period, Value, Stock Options Exercised Forfeitures (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeited in Period Common stock, shares authorized (in shares) Common Stock, Shares Authorized Cash and due from banks Cash and Due from Banks Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] Maximum Maximum [Member] Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax Issuance of common shares pursuant to stock-based compensation plan, net (in shares) Shares Issued, Shares, Share-Based Payment Arrangement, before Forfeiture Omnibus Plan Omnibus Plan [Member] Omnibus Plan Construction Construction [Member] Cash paid for income taxes Income Taxes Paid, Net Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] Entity Small Business Entity Small Business Measurement Basis [Axis] Measurement Basis [Axis] Loan Restructuring Modification [Domain] Loan Restructuring Modification [Domain] Interest income Interest and Dividend Income, Including Tax Equivalent Adjustment, Operating Interest and Dividend Income, Including Tax Equivalent Adjustment, Operating Shares issued in period (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Shares Issued in Period Schedule of Net Benefit Costs Schedule of Net Benefit Costs [Table Text Block] Fee Revenue and Other Income: Revenues [Abstract] Credit Exposure Of Loan Portfolio [Axis] Credit Exposure Of Loan Portfolio [Axis] Credit exposure Of Loan Portfolio [Domain] Beginning balance (in dollars per share) Ending balance (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding, Weighted Average Exercise Price Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding, Weighted Average Exercise Price Purchase of securities available-for-sale Payments to Acquire Debt Securities, Available-for-Sale Basis of Presentation Significant Accounting Policies [Text Block] Taxable Interest Income, Securities, Operating, Taxable Unrecognized compensation expense Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount Software Computer Software, Intangible Asset [Member] Loans Subject To Normal Monitoring Loans Subject To Normal Monitoring [Member] Loans Subject To Normal Monitoring [Member] Increase in accounts receivable Increase (Decrease) in Accounts Receivable Title of 12(b) Security Title of 12(b) Security Schedule of Defined Benefit Plans Disclosures [Table] Schedule of Defined Benefit Plans Disclosures [Table] Short-term investments Short-Term Investments Net increase (decrease) in time deposits Increase (Decrease) in Time Deposits AFS, Less than 12 months, Unrealized Losses Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss Net (decrease) increase in noninterest-bearing demand deposits Net decrease in noninterest-bearing demand deposits Net change during the reporting period in noninterest-bearing demand deposits. Operating lease, liability Total lease liability Operating Lease, Liability Industry Segment Information Segment Reporting Disclosure [Text Block] Accretion (Amortization) of Discounts and Premiums, Investments Accretion (Amortization) of Discounts and Premiums, Investments Schedule of Intangible Assets and Goodwill Schedule of Intangible Assets and Goodwill [Table Text Block] Investments, Debt and Equity Securities [Abstract] Investments, Debt and Equity Securities [Abstract] Financing Receivable, Allowance for Credit Loss [Table] Financing Receivable, Allowance for Credit Loss [Table] AFS, 12 months or more, Unrealized Losses Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss Financing Receivable, Allowance for Credit Loss [Roll Forward] Financing Receivable, Allowance for Credit Loss [Roll Forward] Liabilities and Shareholders’ Equity Liabilities and Equity [Abstract] Fair Value Estimate of Fair Value Measurement [Member] Treasury securities US Treasury Securities [Member] Exempt from federal income taxes Interest Income, Securities, Operating, Tax Exempt Recoveries Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Recovery Modified loans Financing Receivable, Excluding Accrued Interest, Modified, after 12 Months Financing Receivable, Excluding Accrued Interest, Modified, after 12 Months Comprehensive Income Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract] Loans, net Loans Receivable, Fair Value Disclosure Entity Filer Category Entity Filer Category Weighted-average common shares outstanding (in shares) Weighted Average Number of Shares Outstanding, Basic Commercial and industrial Commercial and Industrial [Member] Commercial And Industrial Loan Security Exchange Name Security Exchange Name Gains on sales of securities Debt and Equity Securities, Gain (Loss) Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Preferred stock, par value $.50 per share; 2,000,000 shares authorized and no shares issued Preferred Stock, Value, Issued Letters of credit Letters of Credit Outstanding, Amount Restricted Stock Restricted Stock [Member] Schedule of Debt Schedule of Debt [Table Text Block] Balance sheet liabilities: Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract] Fee revenues Fee revenues, in-scope of FASB ASC 606 Revenue from Contract with Customer, Excluding Assessed Tax Increase in current income tax liability Increase (Decrease) in Income Taxes Payable Net decrease in interest-bearing demand and savings deposits Net increase in interest-bearing demand and savings deposits Net change during the reporting period in interest-bearing demand and savings deposits. SARs Stock Appreciation Rights (SARs) [Member] 60-89 Days Financial Asset, 60 to 89 Days Past Due [Member] Cover [Abstract] Interest on short-term borrowings Interest Expense, Short-Term Borrowings Stock-Based Compensation Share-Based Payment Arrangement [Text Block] Other assets Other Assets Revenue from Contract with Customers Revenue from Contract with Customer [Text Block] Segment Reporting [Abstract] Segment Reporting [Abstract] Forecast Forecast [Member] Net interest income Intersegment income (expense) Interest Income (Expense), Net Average funding sources Average funding sources Funding sources. Total liabilities and shareholders’ equity Liabilities and Equity Interest Rate Reduction Contractual Interest Rate Reduction [Member] Diluted Earnings Per Share, Diluted [Abstract] Organization, Consolidation and Presentation of Financial Statements [Abstract] Organization, Consolidation and Presentation of Financial Statements [Abstract] Current Fiscal Year End Date Current Fiscal Year End Date Available-for-sale securities, gross realized gains Debt Securities, Available-for-Sale, Realized Gain Discount on cash flows Lessee, Operating Lease, Liability, Undiscounted Excess Amount Finite-Lived Intangible Assets [Line Items] Finite-Lived Intangible Assets [Line Items] Diluted earnings per share (in dollars per share) Earnings Per Share, Diluted Other intangible assets, net Intangible Assets, Net (Excluding Goodwill) Schedule of Credit Exposure of the Loan Portfolio Schedule of Credit Exposure of the Loan Portfolio [Table Text Block] Tabular disclosure for credit exposure of loan portfolio by internally assigned credit grade. Award vesting period Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period Stock-based compensation expense APIC, Share-Based Payment Arrangement, Increase for Cost Recognition Consolidation Items [Axis] Consolidation Items [Axis] Interest and dividends on securities: Interest and Dividend Income, Securities, by Taxable Status [Abstract] 2-3 years Lessee, Operating Lease, Liability, to be Paid, Year Two Due after 10 years Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 10 Net interest income after (release of) provision for credit losses Interest Income (Expense), after Provision for Loan Loss Marketable Securities [Table] Marketable Securities [Table] (Release of) provision for credit losses Financing Receivable, Credit Loss, Expense (Reversal) Corporate bonds Corporate Debt Securities [Member] Class of Financing Receivable [Axis] Class of Financing Receivable [Axis] Schedule of Operating Lease Maturity Lessee, Operating Lease, Liability, Maturity [Table Text Block] Entity Address, Address Line Two Entity Address, Address Line Two Entity Address, Address Line One Entity Address, Address Line One Other financing activities, net Proceeds from (Payments for) Other Financing Activities Product and Service [Axis] Product and Service [Axis] Balance sheet assets: Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] Exercised (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Exercises in Period, Weighted Average Exercise Price Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Exercises in Period, Weighted Average Exercise Price Expected return on plan assets Defined Benefit Plan, Expected Return (Loss) on Plan Assets Fair Value Disclosures [Abstract] Fair Value Disclosures [Abstract] Total interest expense Interest expense Interest Expense Trade name Trade Names [Member] Retirement Plan Type [Axis] Retirement Plan Type [Axis] Equity [Abstract] Equity [Abstract] Vested (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period Entity Tax Identification Number Entity Tax Identification Number Net (Increase) Decrease In Accounts and Drafts Receivable From Customers Net (Increase) Decrease In Accounts and Drafts Receivable From Customers Net (Increase) Decrease In Accounts and Drafts Receivable From Customers Customer lists Customer Lists [Member] Amortized Cost Debt Securities, Available-for-Sale, Amortized Cost, Fiscal Year Maturity [Abstract] Beginning balance (in shares) Ending balance (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Outstanding, Number Schedule of Disaggregation of Revenue Disaggregation of Revenue [Table Text Block] Revenue from Contract with Customer [Abstract] Revenue from Contract with Customer [Abstract] Expected amortization, remainder of fiscal year Finite-Lived Intangible Asset, Expected Amortization, Remainder of Fiscal Year Financial fees Financial Fees [Member] Financial Fees Other Revenue Not from Contract with Customer, Other Current Financial Asset, Not Past Due [Member] Effect of dilutive restricted stock and stock appreciation rights (in shares) Weighted Average Number of Shares Outstanding, Diluted, Adjustment Other intangible assets, net Other Intangible Assets, Net Entity Central Index Key Entity Central Index Key Amortization expense, rolling year four Finite-Lived Intangible Assets, Amortization Expense, Rolling Year Four Fair Value Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] Number of troubled debt restructured loans Financing Receivable, Modifications, Number of Contracts Interest-bearing Interest-Bearing Deposit Liabilities Number of shares authorized to be repurchased (in shares) Stock Repurchase Program, Number of Shares Authorized to be Repurchased Measurement Input Type [Axis] Measurement Input Type [Axis] Loss Contingency Nature [Axis] Loss Contingency Nature [Axis] City Area Code City Area Code Assets Assets [Abstract] Retirement Benefits [Abstract] Retirement Benefits [Abstract] Deposits: Deposits, by Type [Abstract] Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Noninterest-bearing Noninterest-Bearing Deposit Liabilities Proceeds from maturities of securities available-for-sale Proceeds from Maturities, Prepayments and Calls of Debt Securities, Available-for-Sale Allowance for unfunded commitments Fair Value, Investments, Entities that Calculate Net Asset Value Per Share, Unfunded Commitments Interest Expense: Interest Expense [Abstract] Net decrease (increase) in accounts and drafts receivable from customers Increase In Accounts and Drafts Payable Net change during the reporting period in the carrying amount of accounts and drafts payable. Cash Flows From Financing Activities: Net Cash Provided by (Used in) Financing Activities [Abstract] Remaining number of shares authorized to be repurchased (in shares) Stock Repurchase Program, Remaining Number of Shares Authorized to be Repurchased Stock-based compensation expense Share-Based Payment Arrangement, Noncash Expense Equipment Equipment Expense Total operating expense Noninterest Expense Other operating expense Other Noninterest Expense Payment Delay Payment Deferral [Member] Fair Value Debt Securities, Available-for-Sale, Fair Value, Fiscal Year Maturity [Abstract] Purchases of premises and equipment, net Payments to Acquire Property, Plant, and Equipment Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Schedule of Earnings Per Share, Basic and Diluted Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]