Document and Entity Information [Abstract] Document And Entity Information Document Type Amendment description Document Annual Report Document Transition Report Document Period End Date Entity File Number Entity Registrant Name Entity Incorporation, State or Country Code Entity Tax Identification Number Entity Address, Address Line One Entity Address, Address Line Two Entity Address, Address Line Three Entity Address, City or Town Entity Address, State or Province Entity Address, Postal Zip Code City Area Code Local Phone Number Title of 12(b) Security Trading Symbol Name of Exchange on which Security is Registered Entity Well-Known Seasoned Issuer Entity Voluntary Filers Entity Current Reporting Status Entity Interactive Data Current Entity Filer Category Entity Small Business Entity Emerging Growth Company Entity ExTransition Period Auditor Attestation Flag Entity Shell Company Entity Public Float Entity Common Stock, Shares Outstanding Documents Incorporated By Reference Text Block Amendment Flag Document Fiscal Year Focus Document Fiscal Period Focus Entity Central Index Key Current Fiscal Year End Date Statement of Financial Position [Abstract] Assets Assets: Cash and due from banks Interest-bearing deposits in other financial institutions Federal funds sold and other short-term investments The amount outstanding of funds lent to other depository institutions, securities brokers, or securities dealers in the form of Federal Funds sold; for example, immediately available funds lent under agreements or contracts that mature in one business day or roll over under a continuing contract, regardless of the nature of the transaction or the collateral involved, excluding overnight lending for commercial and industrial purposes. Also include Federal Funds sold under agreements to resell on a gross basis, excluding (1) sales of term Federal Funds, (2) due bills representing purchases of securities or other assets by the reporting bank that have not yet been delivered and similar instruments, (3) resale agreements that mature in more than one business day involving assets other than securities, (4) yield maintenance dollar repurchase agreements, and (5) money market funds. Also includes, other investments not otherwise specified in the taxonomy that will be realized in a short perio Cash and cash equivalents Cash and cash equivalents at beginning of year Cash and cash equivalents at end of year Cash and cash equivalents, Carrying Amount Securities available-for-sale, at fair value Fair Value Available-for-sale Securities, Total Investment in securities, Carrying Amount Loans Less allowance for credit/loan losses Allowance for loan/credit losses on loans Allowance for loan losses, Beginning Balance Allowance for loan losses, Ending Balance Loans, net Loans, net, Carrying Amount Loans, net 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. Premises and equipment, net Total Investments in bank-owned life insurance Goodwill Other intangible assets, net Intangible Assets, Net (Excluding Goodwill) Other assets Total assets Total Assets Liabilities and Shareholders' Equity Liabilities: Deposits Noninterest-bearing Interest-bearing Total Total deposits Deposits, Carrying Amount Accounts and drafts payable Short-term borrowings Other liabilities Total liabilities Liabilities Shareholders' Equity: Shareholders' equity: Preferred stock, par value $.50 per share; 2,000,000 shares authorized and no shares issued Common stock, par value $.50 per share; 40,000,000 shares authorized, 15,505,772 shares issued at December 31, 2020 and 2019. Additional paid-in capital Retained earnings Common shares in treasury, at cost (1,113,103 and 991,406 shares at December 31, 2020 and 2019, respectively) Treasury Stock, Value Accumulated other comprehensive loss Total shareholders' equity Balance Balance Total shareholders' equity Total liabilities and shareholders' equity Liabilities and Equity Preferred stock, par value (in dollars per share) Preferred stock, shares authorized Preferred stock, shares issued Common stock, par value (in dollars per share) Common stock, shares authorized Common stock, shares issued Treasury stock, shares Income Statement [Abstract] Fee Revenue and Other Income: Information services payment and processing revenue Information services payment and processing revenue Information services revenue Revenue earned from providing services relating to transportation invoice rating, payment, audit, accounting and transportation information to many of the nation's largest companies. Bank service fees Bank service fees. Gains (losses) on sales of securities Net (gains) losses on sales of securities Gain (loss) on sales of investment securities Other Total fee revenue and other income Fee revenue and other income Interest Income: Interest and fees on loans Interest and dividends on securities: Taxable Exempt from federal income taxes Interest on federal funds sold and other short-term investments Interest income on federal funds sold and other short-term investments. Total interest income Interest income Interest and Dividend Income, Operating Interest Expense: Interest on deposits Total Interest on short-term borrowings Total interest expense Interest expense Net interest income Net interest income Provision for credit/loan losses Net interest income after provision for credit/loan losses Net interest income after provision Total net revenue Revenues Operating Expense: Personnel Salaries and employee benefits Occupancy Equipment Amortization of intangible assets Other operating Total other operating expense Total operating expense Operating expense Income before income tax expense Income tax expense Total income tax expense Net income Net income Basic Earnings Per Share Basic earnings per share (in dollars per share) Basic earnings per share Diluted Earnings Per Share Diluted earnings per share (in dollars per share) Diluted earnings per share Statement of Comprehensive Income [Abstract] Comprehensive income: Other comprehensive income (loss): Net unrealized gain (loss) on securities available-for-sale Tax effect OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment, Tax Reclassification adjustments for (gains) losses included in net income Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, before Tax Tax effect FASB ASC 715 pension adjustment Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, before Tax Tax effect Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, Tax Foreign currency translation adjustments Other comprehensive income (loss) Other comprehensive income (loss) Total comprehensive income Comprehensive Income (Loss), Net of Tax, Attributable to Parent Statement of Cash Flows [Abstract] Cash Flows From Operating Activities: Cash flows from operating activities: Adjustments to reconcile net income to net cash provided by operating activities: Adjustments to reconcile net income to net cash provided by (used in) operating activities: Depreciation and amortization Stock-based compensation expense Share-Based Compensation Deferred income tax (benefit) expense Increase (decrease) in current income tax liability Increase (decrease) in pension liability Decrease in accounts receivable Increase (Decrease) in Accounts Receivable Other operating activities, net Other, net Net cash provided by operating activities Net Cash Provided by (Used in) Operating Activities Cash Flows From Investing Activities: Cash flows from investing activities: Proceeds from sales of securities available-for-sale Proceeds from maturities of securities available-for-sale Purchase of securities available-for-sale Net decrease in securities Payments to Acquire Available-for-sale Securities Net increase in loans Payments for (Proceeds from) Loans and Leases Decrease (increase) in payments in advance of funding Net decrease (increase) in payments in advance of funding Net change during the reporting period in the carrying amount of payments in excess of funding. (Increase) Decrease In Payments In Excess Of Funding Purchases of premises and equipment, net Payments to Acquire Property, Plant, and Equipment Asset acquisition of Gateway Giving, LLC Acquisition cash payment Net cash used in investing activities Net Cash Provided by (Used in) Investing Activities Cash Flows From Financing Activities: Cash flows from financing activities: Net increase in noninterest-bearing demand deposits Net change during the reporting period in noninterest-bearing demand deposits. Net increase (decrease) in interest-bearing demand and savings deposits Net (decrease) increase in time deposits Net increase (decrease) in accounts and drafts payable Net (decrease) increase in short-term borrowings Short-term borrowings Cash dividends paid Payments of Ordinary Dividends, Common Stock Purchase of common shares for treasury Payments for Repurchase of Common Stock Other financing activities, net Net cash provided by financing activities Net Cash Provided by (Used in) Financing Activities Net increase (decrease) in cash and cash equivalents Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect Supplemental information: Cash paid for interest Cash paid for income taxes Statement of Stockholders' Equity [Abstract] Statement [Table] Equity Components [Axis] Common Stock [Member] Additional Paid-in Capital [Member] Retained Earnings [Member] Treasury Stock [Member] Accumulated Other Comprehensive Income (Loss) [Member] Statement [Line Items] Cumulative effect of accounting change (ASU 2016-13), net of tax Cumulative effect of accounting change (ASU 2016-13), net of tax. Balance, January 1, 2020 Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity. StockholdersEquity2 Cash dividends Dividends, Common Stock, Cash Stock dividend Dividends, Common Stock Issuance of common shares pursuant to stock-based compensation plan, net Exercise of SARs Stock Issued During Period, Value, Stock Options Exercised Stock-based compensation expense APIC, Share-based Payment Arrangement, Increase for Cost Recognition Purchase of common shares Treasury Stock, Value, Acquired, Cost Method Excess tax benefits associated with stock based compensation Other comprehensive income reclassification for ASU 2018-02 Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax Net unrealized loss on securities available for sale, net of tax FASB ASC 715 adjustment, net of tax Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax Cash dividends, per share Stock issued pursuant to stock-based compensation Stock Issued During Period, Shares, Purchase of Assets Accounting Policies [Abstract] Summary of Significant Accounting Policies Broker-Dealer, Net Capital Requirement, SEC Regulation [Abstract] Capital Requirements and Regulatory Restrictions Investments, Debt and Equity Securities [Abstract] Investment in Securities Receivables [Abstract] Loans Loans, Notes, Trade and Other Receivables Disclosure [Text Block]