Document and Entity Information Document Type Document Quarterly Report Document Period End Date Document Transition Report Securities Act File Number Entity Registrant Name Entity Incorporation, State or Country Code Entity Tax Identification Number Entity Address, Address Line One 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 Security Exchange Name Entity Current Reporting Status Entity Interactive Data Current Entity Filer Category Entity Small Business Entity Emerging Growth Company Entity Shell Company Entity Common Stock, Shares Outstanding Entity Central Index Key Current Fiscal Year End Date Document Fiscal Year Focus Document Fiscal Period Focus Amendment Flag Consolidated Statements of Condition Statement [Table] Statement [Line Items] Statement Assets [Abstract] Assets Cash and Cash Equivalents, at Carrying Value Cash and cash equivalents Marketable Securities [Abstract] Investment securities: Debt Securities, Held-to-Maturity, Excluding Accrued Interest, after Allowance for Credit Loss Carrying value Amortized cost, held-to-maturity debt securities Held to maturity debt securities (Market value of $4,400 on March 31, 2026 and $4,400 on December 31, 2025) Debt Securities, Available-for-Sale, Excluding Accrued Interest Available for sale debt securities (Amortized cost of $5,307,858 on March 31, 2026 and $5,281,090 on December 31, 2025) Estimated fair value, Available for sale securities Estimated fair value, Available-for-sale securities Equity Securities, FV-NI Equity Securities Equity securities with readily determinable fair values Short-Term Investments Total investment securities Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss Loans Total loans Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest Less allowance for credit losses Balance at the end of the period Balance at the beginning of the period Financing Receivable, Excluding Accrued Interest, after Allowance for Credit Loss Net loans Property, Plant and Equipment, Net Bank premises and equipment, net Interest Receivable Accrued interest receivable Other Long-Term Investments Other investments Cash Surrender Value of Life Insurance Cash surrender value of life insurance policies Goodwill Goodwill Other Assets Other assets Assets Total assets Liabilities and Equity [Abstract] Liabilities and Shareholders' Equity Liabilities [Abstract] Liabilities: Deposits [Abstract] Deposits: Deposits Noninterest-Bearing Deposit Liabilities Demand-non-interest bearing Interest-Bearing Deposit Liabilities Savings and interest bearing demand Time Deposits Time Carrying amount of time deposits Deposits. Total deposits Securities Sold under Agreements to Repurchase Securities sold under repurchase agreements Advance from Federal Home Loan Bank Other borrowed funds Junior Subordinated Debenture Owed to Unconsolidated Subsidiary Trust Junior subordinated deferrable interest debentures Other Liabilities Other liabilities Liabilities Total liabilities Equity, Attributable to Parent [Abstract] Shareholders' equity: Common Stock, Value, Issued Common shares of $1.00 par value. Authorized 275,000,000 shares; issued 96,670,869 shares on March 31, 2026 and 96,658,794 shares on December 31, 2025 Additional Paid in Capital Surplus Retained Earnings (Accumulated Deficit) Retained earnings Accumulated Other Comprehensive Income (Loss), Net of Tax Accumulated other comprehensive loss Stockholders' Equity before Treasury Stock Total shareholders' equity before treasury stock Treasury Stock, Common, Value Less cost of shares in treasury, 34,490,875 shares on March 31, 2026 and 34,490,048 on December 31, 2025 Equity, Attributable to Parent Balance Balance Total shareholders' equity Liabilities and Equity Total liabilities and shareholders' equity Debt Securities, Held-to-Maturity, Fair Value Held to maturity, Market value (in dollars) Estimated fair value Estimated fair value, held-to-maturity debt securities Debt Securities, Available-for-Sale, Amortized Cost, Excluding Accrued Interest, before Allowance for Credit Loss Available for sale, Amortized cost (in dollars) Amortized cost, Available-for-sale securities Common Stock, Par or Stated Value Per Share Common shares, par value (in dollars per share) Common Stock, Shares Authorized Common shares, Authorized shares Common Stock, Shares, Issued Common shares, issued shares Treasury Stock, Common, Shares Treasury, shares Consolidated Statements of Income Product and Service [Axis] Product and Service [Domain] Represents information pertaining to services charges on deposit accounts. Services charges on deposit accounts [Member] Service charges on deposit accounts Represents information pertaining to Other Service Charges, Commissions and Fees, Banking. Other service charges, commissions and fees Banking [Member] Other service charges, commissions and fees, Banking Represents information pertaining to Other Service Charges, Commissions and Fees, Non-Banking. Other service charges, commissions and fees, Non-banking [Member] Other service charges, commissions and fees, Non-banking Interest and Dividend Income, Operating [Abstract] Interest income: Interest and Fee Income, Loans and Leases Loans, including fees Interest and Dividend Income, Securities, by Taxable Status [Abstract] Investment securities: Interest Income, Securities, Operating, Taxable Taxable Interest Income, Securities, Operating, Tax Exempt Tax-exempt Other Interest and Dividend Income Other interest income Interest and Dividend Income, Operating Total interest income Interest Expense, Operating [Abstract] Interest expense: Interest Expense, NOW Accounts, Money Market Accounts, and Savings Deposits Savings deposits Interest Expense, Time Deposits Time deposits Interest Expense, Securities Sold under Agreements to Repurchase Securities sold under repurchase agreements Interest Expense, Other Domestic Deposits Other borrowings Interest Expense, Junior Subordinated Debentures Junior subordinated deferrable interest debentures Interest Expense, Operating Total interest expense Interest Income (Expense), Operating Net interest income Financing Receivable, Credit Loss, Expense (Reversal) Credit loss expense Credit loss expense Interest Income (Expense), after Provision for Loan Loss Net interest income after provision for credit losses Noninterest Income [Abstract] Non-interest income: Revenue from Contract with Customer, Excluding Assessed Tax Service charges on deposit accounts Noninterest Income, Other Other investments income (loss), net Noninterest Income, Other Operating Income Other income Noninterest Income Total non-interest income Noninterest Expense [Abstract] Non-interest expense: Labor and Related Expense Employee compensation and benefits Occupancy, Net Occupancy Depreciation, Nonproduction Depreciation of bank premises and equipment Professional Fees Professional fees Federal Deposit Insurance Corporation Premium Expense Deposit insurance assessments Other Revenue (Expense) from Real Estate Operations Net operations, other real estate owned Advertising Expense Advertising Information Technology and Data Processing Software and software maintenance Other Noninterest Expense Other Noninterest Expense Total non-interest expense Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest Income before income taxes Income Tax Expense (Benefit) Provision for income taxes Net income Net income Earnings Per Share, Basic [Abstract] Basic earnings per common share: Weighted Average Number of Shares Outstanding, Basic Weighted average number of shares outstanding (in shares) Earnings Per Share, Basic Net income per common share (in dollars per share) Earnings Per Share, Diluted [Abstract] Fully diluted earnings per common share: Weighted Average Number of Shares Outstanding, Diluted Weighted average number of shares outstanding (in shares) Earnings Per Share, Diluted Net income per common share (in dollars per share) Consolidated Statements of Comprehensive Income Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract] Other comprehensive (loss) income, net of tax: OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment, after Tax Net change in unrealized holding (losses) gains on securities available for sale arising during period (net of tax effects of $(5,525) and $11,867) Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Total other comprehensive (loss) income, net of tax Comprehensive Income (Loss), Net of Tax, Attributable to Parent Comprehensive income OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment, Tax Net change in unrealized holding (losses) gains on securities available for sale arising during period, tax effects Consolidated Statements of Shareholders' Equity Equity Components [Axis] Equity Component [Domain] Common Stock [Member] Common Stock Additional Paid-in Capital [Member] Surplus Retained Earnings [Member] Retained Earnings AOCI Attributable to Parent [Member] Other Comprehensive Income (Loss) Treasury Stock, Common [Member] Treasury Stock Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (decrease) in shareholders' equity Shares, Issued Balance (in shares) Balance (in shares) Dividends [Abstract] Dividends: Dividends, Common Stock, Cash Dividends Payable Treasury Stock, Value, Acquired, Cost Method Purchase of treasury stock Stock Issued During Period, Value, Stock Options Exercised Exercise of stock options Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period Options exercised (in shares) Exercise of stock options (in shares) APIC, Share-Based Payment Arrangement, Increase for Cost Recognition Stock compensation expense recognized in earnings This element represents the net change in unrealized gains and losses on available for sale securities, net of reclassification adjustment. Other Comprehensive Income Unrealized Holding Gain (Loss) on Securities Arising During, Net of Reclassification Adjustment Net change in unrealized gains and losses on available for sale securities, net of reclassification adjustments Common Stock, Dividends, Per Share, Declared Cash dividends (in dollars per share) Treasury Stock, Shares, Acquired Purchase of treasury stock (in shares) Consolidated Statements of Cash Flows Net Cash Provided by (Used in) Operating Activities, Continuing Operations [Abstract] Operating activities: Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Net income Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to reconcile net income to net cash provided by operating activities: Other Real Estate, Covered, Valuation Adjustments Specific reserve, other real estate owned Gain (Loss) on Disposition of Property Plant Equipment Gain on sale of bank premises and equipment Gains (Losses) on Sales of Other Real Estate Gain on sale of other real estate owned The periodic adjustments of the differences between securities' face values and purchase prices that are charged against earnings when the security was purchased at a discount. As a noncash item, this element is an adjustment to net income when calculating cash provided by (used in) operations using the indirect method. Accretion of Discounts Investments Accretion of investment securities discounts The periodic adjustments of the differences between securities' face values and purchase prices that are charged against earnings when the security was purchased at a premium. As a noncash item, this element is an adjustment to net income when calculating cash provided by (used in) operations using the indirect method. Amortization of Investment Securities Premiums Amortization of investment securities premiums Equity Securities, FV-NI, Unrealized Gain (Loss) Unrealized loss (gain) on equity securities with readily determinable fair values Unrealized (losses) gains recognized during the reporting period on equity securities still held at the reporting date Share-Based Payment Arrangement, Noncash Expense Stock based compensation expense Income (Loss) from Equity Method Investments (Losses) earnings from affiliates and other investments Deferred Income Tax Expense (Benefit) Deferred tax expense Increase (Decrease) in Accrued Interest Receivable, Net (Increase) decrease in accrued interest receivable Increase (Decrease) in Other Operating Assets (Increase) decrease in other assets Increase (Decrease) in Other Operating Liabilities Increase in other liabilities Net Cash Provided by (Used in) Operating Activities Net cash provided by operating activities Net Cash Provided by (Used in) Investing Activities, Continuing Operations [Abstract] Investing activities: Proceeds from Maturities, Prepayments and Calls of Other Investments Proceeds from maturities of securities Proceeds from Sale of Debt Securities, Available-for-Sale Proceeds from sales and calls of available for sale securities Payments to Acquire Debt Securities, Available-for-Sale Purchases of available for sale securities Proceeds from Maturities, Prepayments and Calls of Mortgage-Backed Securities (MBS) Principal collected on mortgage backed securities Payments for (Proceeds from) Loans and Leases Net increase in loans Payments to Acquire Other Investments Purchases of other investments Cash inflows from other investments. Includes distributions from equity method investments plus other cash inflows from investments not individually reported. Distributions from Other Investments Distributions from other investments Payments to Acquire Property, Plant, and Equipment Purchases of bank premises and equipment Proceeds from Sale of Property, Plant, and Equipment Proceeds from sales of bank premises and equipment Proceeds from Sale of Other Real Estate Proceeds from sales of other real estate owned Net Cash Provided by (Used in) Investing Activities Net cash used in investing activities Net Cash Provided by (Used in) Financing Activities, Continuing Operations [Abstract] Financing activities: The net cash inflow (outflow) in the total of all Noninterest-bearing demand deposits classified as cash flows from financing activities. Increase (Decrease) in Noninterest Bearing Demand Deposits Net (decrease) increase in non-interest bearing demand deposits The net cash inflow (outflow) in the total of all interest bearing deposit accounts, classified as cash flows from financing activities. Increase (Decrease) in Saving and Interest Bearing Demand Deposits Net increase in savings and interest bearing demand deposits Increase (Decrease) in Time Deposits Net increase in time deposits Proceeds from (Payments for) in Securities Sold under Agreements to Repurchase Net increase in securities sold under repurchase agreements Amount of increase (decrease) in long-term loans from another Federal Home Loan Bank (FHLBank). Increase Decrease In Long Term Loans From Other Federal Home Loan Banks Net (decrease) increase in other borrowed funds Payments for Repurchase of Common Stock Purchase of treasury stock Proceeds from Issuance or Sale of Equity Proceeds from stock transactions Payments of Ordinary Dividends, Common Stock Payments of cash dividends Net Cash Provided by (Used in) Financing Activities Net cash provided by financing activities Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Increase in cash and cash equivalents Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents Cash and cash equivalents at end of period Cash and cash equivalents at beginning of period Supplemental Cash Flow Information [Abstract] Supplemental cash flow information: Interest Paid, Excluding Capitalized Interest, Operating Activities Interest paid Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] Non-cash investing and financing activities: Real Estate Owned, Transfer to Real Estate Owned Net transfers from loans to other real estate owned Basis of Presentation Business Description and Basis of Presentation [Text Block] Basis of Presentation