Loans and leases Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Fee, and Loan in Process Offsetting of financial liabilities and derivative liabilities Offsetting Liabilities [Line Items] Loans and leases - net of unearned discount Loans and Leases Receivable, Net of Deferred Income [Abstract] Statistical Measurement [Domain] Statistical Measurement [Domain] Other real estate Other Real Estate [Member] Details pertaining to other real estate properties. Impairment recoveries Valuation Allowance for Impairment of Recognized Servicing Assets, Additions (Deductions) for Expenses (Recoveries) Short-term borrowings Short-Term Debt, Fair Value Professional fees Professional and Directors Fees This element includes fees charged for services from professionals such as doctors, lawyers and accountants. Also includes expenses related to directors' fees which are fees paid by an entity to its directors. Directors fees may be paid in addition to salary and other benefits. Award Timing Predetermined Award Timing Predetermined [Flag] Balance at the beginning of the period Balance at the end of the period Valuation Allowance for Impairment of Recognized Servicing Assets, Balance Asset Class [Axis] Asset Class [Axis] Entity File Number Entity File Number Investment securities pledged as collateral Debt Securities, Available-for-Sale, Restricted Valuation Approach and Technique [Domain] Valuation Approach and Technique [Domain] Interest rate swap contracts Interest rate swaps Interest Rate Swap [Member] Number of domestic aircraft loan pools NumberOfDomesticAircraftLoanPools Number of domestic aircraft loan pools Total gains or losses (realized/unrealized): included in other comprehensive income (loss) Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss) Number of methods to assess credit risk Loans and Leases Receivable, Number of Methods to Assess Credit Risk Represents the number of methods to assess credit risk of loans and leases receivables. Tabular List, Table Tabular List [Table Text Block] Trade publications Trade Publications Valuation Technique [Member] Represents the trade publications valuation technique used to measure fair value. Leases [Abstract] Leases [Abstract] Accrued income and other assets Accrued Income and Other Assets, Fair Value Disclosure Represents the portion of the accrued income and other assets balance sheet assertion valued at fair value. Income from reimbursements for personal property tax payments on operating leased equipment Income Related to Reimbursements from Lessees on Operating Leases Income related to reimbursements from lessees for personal property tax on operating leases. Impaired loans unobservable inputs (as a percent) Impaired Loans Measurement Input Value of input used to measure impaired loans. Charge-offs Financing Receivable, Allowance for Credit Loss, Writeoff Schedule of fair values of financial instruments Fair Value, by Balance Sheet Grouping [Table Text Block] Gross Unrealized Losses Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax Trading Arrangements, by Individual Trading Arrangements, by Individual [Table] Measurement Basis [Axis] Measurement Basis [Axis] Issuance of common shares under stock based compensation awards (in shares) Stock Issued During Period, Shares Stock Based Compensation Awards Number of shares issued during the period as a result of stock based compensation awards including employee stock ownership plan (ESOP) and employee stock purchase plan (ESPP). Basic net income per common share (in dollars per share) Basic earnings per common share (in dollars per share) Earnings Per Share, Basic Adjustment to Compensation: Adjustment to Compensation [Axis] Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Liabilities: Liabilities, Fair Value Disclosure [Abstract] Net charge-offs (recoveries) Financing Receivable Allowance for Credit Losses Net Write Offs Amount of direct write-downs of financing receivables charged against the allowance net of recoveries. Derivative Asset, Fair Value, Amount Offset Against Collateral [Abstract] Derivative Asset, Including Not Subject to Master Netting Arrangement, after Offset and Deduction [Abstract] Discount rate Measurement Input, Discount Rate [Member] Other comprehensive income (loss) Other Comprehensive Income (Loss), Net of Tax Due after ten years Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Rolling after 10 Years, Amortized Cost Total short-term borrowings Short-Term Debt Change in interest receivable Increase (Decrease) in Accrued Interest Receivable, Net Deposits Deposits, Fair Value Disclosure Measurement Input Type [Domain] Measurement Input Type [Domain] Schedule of investment securities available-for-sale Schedule of Available-for-Sale Securities Reconciliation [Table Text Block] Document and Entity Information Document and Entity Information -- None. No documentation exists for this element. -- Adjustment to Compensation, Amount Adjustment to Compensation Amount Total gains or losses (unrealized): included in earnings Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss) Net carrying value of mortgage servicing rights at end of period Servicing Asset Carrying Value, Net Represents the carrying value of mortgage servicing assets, net of valuation allowance, related to mortgage servicing assets. Schedule of carrying value of assets measured at fair value on a non-recurring basis Fair Value Measurements, Nonrecurring [Table Text Block] Loan modifications to borrowers experiencing financial difficulties Financing receivable, Loan Modification [Line Items] Financing receivable, loan modification [Line Items] Change in other assets Increase (Decrease) in Other Operating Assets Stock-based compensation Share-Based Payment Arrangement, Noncash Expense Discount for lack of marketability Measurement Input, Discount for Lack of Marketability [Member] Insurance commissions Insurance Commissions and Fees Combination Weighted Average Payment Delay and Term Extension (in months) FinancingReceivableModifiedWeightedAveragePaymentDelayAndTermExtensionFromModification FinancingReceivableModifiedWeightedAveragePaymentDelayAndTermExtensionFromModification Current period gross charge-offs Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff Employee Stock Option Share-Based Payment Arrangement, Option [Member] Loan modifications to borrowers experiencing financial difficulties subsequent default Loan modifications to borrowers experiencing financial difficulties subsequent default Number of loan modifications to borrowers experiencing financial difficulties which subsequent defaulted within 12 months of modification Award Timing MNPI Disclosure Award Timing MNPI Disclosure [Text Block] Debit card Debit Card [Member] Variable interest entity, primary beneficiary Variable Interest Entity, Primary Beneficiary [Member] Investment securities, taxable Interest Income, Securities, Operating, Taxable Schedule of Accounts, Notes, Loans and Financing Receivable [Table] Accounts and Financing Receivables [Table] Impairment charges Asset Impairment Charges Number of available-for-sale debt securities Available-for-sale, Securities Held, Qualitative Disclosure, Number of Positions Number of available-for-sale debt securities held in portfolio. Common stock dividend ($0.43 and $0.38 per share for the three months ended June 30, 2026 and 2025, respectively and $0.83 and $0.74 per share for the six months ended June 30, 2026 and 2025, respectively) Dividends, Common Stock, Cash Total shareholders’ equity Equity, Attributable to Parent Consumer Consumer Loan [Member] Derivative Financial Instruments Derivative Instruments, Gain (Loss) [Line Items] Measurement Frequency [Axis] Measurement Frequency [Axis] Insider Trading Policies and Procedures [Line Items] Common stock, authorized shares (in shares) Common Stock, Shares Authorized Hedging Designation [Domain] Hedging Designation [Domain] Accrued interest receivable on loans and leases Financing Receivable, Accrued Interest, after Allowance for Credit Loss Assets: Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] Unobservable Inputs Fair Value Measurement Inputs and Valuation Techniques [Abstract] Total liabilities and equity Liabilities and Equity Recurring Recurring basis Fair Value, Recurring [Member] Variable Interest Entities Disclosure Variable Interest Entities Disclosure [Text Block] The entire disclosure for variable interest entities both unconsolidated and consolidated. Derivative Instruments, Gain (Loss) by Hedging Relationship, by Income Statement Location, by Derivative Instrument Risk [Table] Derivative Instruments, Gain (Loss) [Table] Schedule of changes in carrying value of mortgage servicing rights and associated valuation allowance Servicing Asset at Amortized Cost [Table Text Block] Reclassifications out of accumulated other comprehensive income Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] Portion at Fair Value Measurement Portion at Fair Value Measurement [Member] Maximum Maximum [Member] Subordinated Borrowing [Axis] Subordinated Borrowing [Axis] Net loss (income) attributable to noncontrolling interests Net Income (Loss) Attributable to Noncontrolling Interest Financial instruments Derivative Asset, Subject to Master Netting Arrangement, Collateral, Obligation to Return Security Not Offset Accounting Policies [Abstract] Accounting Policies [Abstract] Total fair value Debt Securities, Available-for-Sale, Unrealized Loss Position Non-PEO NEO Average Total Compensation Amount Non-PEO NEO Average Total Compensation Amount Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] Treasury Stock, Common Treasury Stock, Common [Member] Financing Receivable originated during current fiscal year Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year Adjustment to Non-PEO NEO Compensation Footnote Adjustment to Non-PEO NEO Compensation Footnote [Text Block] Pay vs Performance Disclosure [Line Items] Financing Receivable, Credit Quality Indicator [Table] Financing Receivable, Credit Quality Indicator [Table] Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount 90 Days or More Past Due Financial Asset, Equal to or Greater than 90 Days Past Due [Member] LIABILITIES Liabilities [Abstract] Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] Weighted Average Term Extension Modification (in months) Financing Receivable, Modified, Weighted Average Term Increase from Modification Income before income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Entity Shell Company Entity Shell Company Accrued interest and penalties Income Tax Examination, Penalties and Interest Accrued Revolving loans converted to term Financing Receivable, Excluding Accrued Interest, Revolving, Converted to Term Loan Appraisals trade publications and auction values Appraisals Trade Publications and Auction Values Valuation Technique [Member] Represents the appraisals trade publications and auction values valuation technique used to measure fair value. Amortization of mortgage servicing rights Amortization of Mortgage Servicing Rights (MSRs) Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Schedule of Variable Interest Entities [Table] Variable Interest Entity [Table] Mortgage servicing rights Mortgage Servicing Rights [Member] Details pertaining to mortgage servicing rights. Financing Receivable originated two years prior to current fiscal year Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Company Selected Measure Amount Company Selected Measure Amount Current period gross charge-offs, financing receivable originated five years prior to current fiscal year Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year, Writeoff Comprehensive (income) loss attributable to noncontrolling interests Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Total interest expense Interest Expense, Operating Short-term borrowings: Short-Term Debt [Abstract] Premises and equipment, net Property, Plant, and Equipment, Excluding Lessor Asset under Operating Lease, after Accumulated Depreciation Comprehensive income (loss) available to common shareholders Comprehensive Income (Loss), Net of Tax, Attributable to Parent Reclassification Out of Accumulated Other Comprehensive Income [Table] Reclassification out of Accumulated Other Comprehensive Income [Table] Measurement Input Type [Axis] Measurement Input Type [Axis] Long-term debt and mandatorily redeemable securities Interest Expense, Long Term Debt and Mandatorily Redeemable Securities This element represents the aggregate amount of interest incurred on all long-term debt and mandatorily redeemable securities. Name Measure Name Commercial and similar letters of credit Letter of Credit [Member] Offsetting Liabilities [Table] Offsetting Liabilities [Table] Issuances Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Issuances Proceeds from maturities and paydowns of investment securities available-for-sale Proceeds from Maturities, Prepayments and Calls of Debt Securities, Available-for-Sale Impairment recoveries AssetImpairmentRecoveries Amount of write-up of assets recognized in the income statement. Includes, but is not limited to, gains from tangible assets, intangible assets and goodwill. Document Fiscal Period Focus Document Fiscal Period Focus Goodwill and intangible assets Intangible Assets, Net (Including Goodwill) Derivative Financial Instruments Derivatives, Fair Value [Line Items] Schedule of differences between the fair value carrying amount of mortgages held for sale measured at fair value and the aggregate unpaid principal amount Fair Value Option, Disclosures [Table Text Block] Award Timing Method Award Timing Method [Text Block] Schedule of gross realized gains and losses from securities available-for-sale Unrealized Gain (Loss) on Investments [Table Text Block] Award Type [Axis] Award Type [Axis] Total assets Investment carrying amount Assets Investing activities: Cash Provided by (Used in) Investing Activity, Continuing Operation [Abstract] Trading Symbol Trading Symbol Loan and Lease Financings Financing Receivable, Credit Quality Indicator [Line Items] Letter of credit term Letter of Credit Term Represents the time period for repayment of funds borrowed under the letter of credit. Investment securities, tax-exempt Interest Income, Securities, Operating, Tax Exempt Changes in allowance for loan and lease losses Financing Receivable, Allowance for Credit Loss [Roll Forward] Entity Address, City or Town Entity Address, City or Town Short-term Debt, Type [Domain] Short-Term Debt, Type [Domain] Receivable Type [Axis] Receivable Type [Axis] Other investments Federal Home Loan Bank Stock and Federal Reserve Bank Stock Class of Financing Receivable [Axis] Class of Financing Receivable [Axis] Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount Net change in short-term borrowings Proceeds from (Repayments of) Short-Term Debt Income Statement Location [Domain] Statement of Income Location, Balance [Domain] Fair Value Debt Securities, Available-for-sale, Unrealized Loss Position, Fair Value [Abstract] Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Short-term borrowings Interest Expense, Short-Term Borrowings Assets: Assets, Fair Value Disclosure [Abstract] Subordinated Borrowing [Table] Subordinated Borrowing [Table] Due after one year through five years Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Rolling after One Through Five Years, Amortized Cost Variable Interest Entity [Line Items] Variable Interest Entity [Line Items] Entity Emerging Growth Company Entity Emerging Growth Company Cash dividends (in dollars per share) Common Stock, Dividends, Per Share, Declared Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Right of use assets obtained in exchange for lease obligations Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Cash Collateral Pledged Derivative Liability, Subject to Master Netting Arrangement, Collateral, Right to Reclaim Cash Not Offset Outstanding stock options (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year [Member] Unfunded Loan Commitment Unfunded Loan Commitment [Member] Level 2 Fair Value, Inputs, Level 2 [Member] Gain (loss) Derivative, Gain (Loss) on Derivative, Net Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] Fair Value, off-Balance-Sheet Risks, Disclosure Information [Line Items] Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] Total noninterest income Noninterest Income Subordinated Borrowing, Name [Domain] Subordinated Borrowing, Name [Domain] Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract] Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract] Residential mortgage loans Residential Mortgage [Member] PEO PEO [Member] Transfers into Level 3 Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3 Noninterest expense: Noninterest Expense [Abstract] Schedule of contractual maturities of investments in debt securities available-for-sale Investments Classified by Contractual Maturity Date [Table Text Block] Class of Financing Receivable [Domain] Class of Financing Receivable [Domain] Income before income taxes Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest Due in one year or less Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Rolling within One Year, Fair Value Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year [Member] Derivative Instruments and Hedging Activities Disclosure [Abstract] Derivative Instruments and Hedging Activities Disclosure [Abstract] Time Time Deposits Retained Earnings Retained Earnings [Member] Weighted Average Interest Rate Reduction Financing Receivable, Modified, Weighted Average Interest Rate Decrease from Modification Schedule Of Available For Sale Debt Securities [Table] Schedule Of Available For Sale Debt Securities [Table] Schedule Of Available For Sale Debt Securities [Table] Repossessions Repossessions [Member] Details pertaining to repossessions of asset. Entity Address, Postal Zip Code Entity Address, Postal Zip Code Restatement Determination Date Restatement Determination Date Share-based Payment Arrangement [Abstract] Share-Based Payment Arrangement [Abstract] Cash and cash equivalents, beginning of year Cash and cash equivalents, end of period Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Income Statement [Abstract] Income Statement [Abstract] Net Amounts of Assets Presented in the Statement of Financial Position Derivative Asset Income tax expense Income tax expense Income Tax Expense (Benefit) 12 months or Longer Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer Basis spread on variable rate (as a percent) Debt Instrument, Basis Spread on Variable Rate Accrued income and other assets Other Assets Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value Balance at the beginning of the period Balance at the end of the period Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value Non-recurring Fair Value, Nonrecurring [Member] Change in interest payable Increase (Decrease) in Interest Payable, Net Mortgage servicing rights unobservable inputs (as a percent) Servicing Asset, Measurement Input Preferred stock, issued shares (in shares) Preferred Stock, Shares Issued Pension Adjustments Service Cost Pension Adjustments Service Cost [Member] (Recovery of) provision for credit losses - unfunded loan commitments (Recovery of provision) provision Off-Balance-Sheet, Credit Loss, Liability, Credit Loss Expense (Reversal) Product and Service [Domain] Product and Service [Domain] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Schedule of amortized cost of collateral - dependent loans which are individually evaluated for impairment by collateral type. Schedule of Financing Receivable By Collateral Type [Table Text Block] Schedule of Financing Receivable By Collateral Type Total Shareholders' Equity Parent [Member] Net income Net income Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Accumulated other comprehensive loss AOCI, Debt Securities, Available-for-Sale, Adjustment, after Tax Restatement does not require Recovery Restatement Does Not Require Recovery [Text Block] Total Liabilities, Fair Value Disclosure Notional or contractual amount Derivative, Notional Amount Credit Quality Grades 1-6 Internally Assigned Grade 1 to 6 [Member] Represents internally generated quality grades indicating the upper end of quality rankings, such that a credit quality grade of 1 indicates a superior credit quality. Revolving loans Financing Receivable, Excluding Accrued Interest, Revolving Amortization of right of use assets Operating Lease, Right-of-Use Asset, Periodic Reduction Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] City Area Code City Area Code Schedule of changes in allowance for loan and lease losses, segregated by portfolio segment Financing Receivable, Allowance for Credit Loss [Table Text Block] Award Timing, How MNPI Considered Award Timing, How MNPI Considered [Text Block] Federal tax credits recognized in tax expense Federal Tax Credits Recognized In Tax Expense Federal income tax credits related to affordable housing and community development tax-advantaged investments in tax expense All Trading Arrangements All Trading Arrangements [Member] Equity Awards Adjustments, Footnote Equity Awards Adjustments, Footnote [Text Block] Total Shareholder Return Vs Peer Group Total Shareholder Return Vs Peer Group [Text Block] Other Noninterest Income, Other Operating Income Long-term debt and mandatorily redeemable securities Long Term Debt and Mandatorily Redeemable Securities This element represents the aggregate carrying amount of long-term borrowings as of the balance sheet date including Federal Home Loan Bank borrowings, current portion of long term debt and promissory notes. Also includes the amount that is required to be paid, determined under the conditions specified in the contract, if as of the reporting date, the shares are mandatorily redeemable after one year from the reporting date or operating cycle, if longer. Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] Subordinated notes Amount of subordinated notes Junior Subordinated Debenture Owed to Unconsolidated Subsidiary Trust Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Net change in operating activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Accrued interest receivable Interest Receivable General business assets Other Collateral [Member] Other Collateral Issuance of 12,945 and 15,613 common shares under stock based compensation awards for the three months ended June 30, 2026 and 2025, respectively and 51,164 and 65,616 common shares under stock based compensation awards for the six months ended June 30, 2026 and 2025, respectively Stock Issued During Period, Value Stock Based Compensation Awards Value of stock issued during the period as a result of stock based compensation awards including employee stock ownership plan (ESOP) and employee stock purchase plan (ESPP). Summary of subordinated notes Schedule of Subordinated Notes Pertaining to Capital Trusts [Table Text Block] Tabular disclosure of junior subordinated notes issued to capital trusts including interest rates, maturity dates, original issuance and amount owed by issuance. Proceeds from sales of investment securities available-for-sale Proceeds from sales Proceeds from Sale of Debt Securities, Available-for-Sale Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales Sales Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales Interest and penalties net of tax recognized Tax Adjustments, Settlements, and Unusual Provisions Autos Automobiles [Member] Recoveries Financing Receivable, Allowance for Credit Loss, Recovery Net interest income Interest Income (Expense), Operating Accrued expenses and other liabilities Other Liabilities Equity Valuation Assumption Difference, Footnote Equity Valuation Assumption Difference, Footnote [Text Block] PEO Total Compensation Amount PEO Total Compensation Amount Variable Interest Entities [Abstract] Variable Interest Entities [Abstract] Variable Interest Entities [Abstract] Repurchase Agreements and Similar Transactions, Maturity Periods [Axis] Repurchase Agreements and Similar Transactions, Maturity Periods [Axis] Liability derivatives, Fair value Accrued expenses and other liabilities Derivative Liability, Subject to Master Netting Arrangement, before Offset Interest income on lease receivable Direct Financing Lease, Interest Income Contractual maturities of investments in debt securities available-for-sale, Amortized Cost Debt Securities, Available-for-Sale, Amortized Cost, Rolling Maturity [Abstract] Equity Components [Axis] Equity Components [Axis] Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3 Transfers out of Level 3 Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3 Financing Receivable originated three years prior to current fiscal year Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year Standby letters of credit Standby Letters of Credit [Member] Repossessions unobservable inputs (as a percent) Repossessions Measurement Input Value of input used to measure repossessions owned by financial institution which is not directly related to its business. Non-Rule 10b5-1 Arrangement Adopted Non-Rule 10b5-1 Arrangement Adopted [Flag] Equipment Equipment [Member] Mortgage Servicing Rights Transfers and Servicing of Financial Assets [Text Block] Accounting Policies Organization, Consolidation, Basis of Presentation, Business Description and Accounting Policies [Text Block] Supplemental Information: Supplemental Cash Flow Information [Abstract] Amortized cost of Investment Securities available-for-sale Amortized cost of Investment Securities available-for-sale Debt Securities, Available-for-Sale, Amortized Cost Commercial real estate Commercial Real Estate [Member] Other Performance Measure, Amount Other Performance Measure, Amount U.S. Treasury and Federal agencies securities US Treasury and Government [Member] Entity Address, State or Province Entity Address, State or Province Total interest income Interest and Dividend Income, Operating Receivables Receivables [Member] Receivables [Member] Financial Asset, Period Past Due [Domain] Financial Asset, Aging [Domain] Fair value of mortgage servicing rights exceeding the carrying value Servicing Asset Fair Value Exceeding Carrying Value Amount Represents the difference between the fair value and carrying value of mortgage servicing assets. Real estate Real Estate Real Estate [Member] Constant prepayment rate (CPR) Measurement Input, Constant Prepayment Rate [Member] Derivative Instrument Risk [Axis] Derivative Instrument [Axis] Individual: Individual [Axis] Liabilities: Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract] Loans transferred to other real estate and repossessions Transfer Other Real Estate and Repossessed Assets This element represents the value of real estate transferred in noncash transactions during the reporting period. Also includes repossessed assets. Number of trusts sponsored Number of Trusts Sponsored Represents the number of trusts sponsored by the entity. Cash dividends paid on common stock Payments of Ordinary Dividends, Common Stock Schedule of amortized cost of loans and leases that were both experiencing financial difficulty and modified, segregated by portfolio segment and type of modification. Financing Receivable, Modified, Past Due [Table Text Block] Net change in investing activities Cash Provided by (Used in) Investing Activity, Including Discontinued Operation Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table [Member] Aggregate unpaid principal Loan, Held-for-Sale or Securitization or Asset-Backed Financing Arrangement, Principal Outstanding Balance at the beginning of the period Carrying value before valuation allowance at end of period Mortgage servicing rights Servicing Asset at Amortized Cost Liquidation of noncontrolling interests Liquidation of noncontrolling interests Noncontrolling Interest, Decrease from Liquidation of Noncontrolling Interest Holders Decrease in noncontrolling interest balance from noncash distributions by the non-wholly owned subsidiary or partially owned entity, included in the consolidation of the parent entity, to the noncontrolling interest holders. Inventory Inventories [Member] Interest Interest Paid, Excluding Capitalized Interest, Operating Activity Document Fiscal Year Focus Document Fiscal Year Focus Maximum exposure to loss, unconsolidated VIEs Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount Mortgage-backed securities Debt Securities, Available-for-Sale, Maturity, without Single Maturity Date, Amortized Cost Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Payments on long-term debt Repayments of Long-Term Debt Entity Interactive Data Current Entity Interactive Data Current Operating activities: Cash Provided by (Used in) Operating Activity, Continuing Operation [Abstract] Carrying Value Carrying or Contract Value Reported Value Measurement [Member] Weighted-average period over which unrecognized compensation cost is expected to be recognized Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition Stock options exercised (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period Trust and wealth advisory Fiduciary and Trust [Member] Direct finance lease term DirectFinanceLeaseTerm Direct finance lease term Nonaccrual Financing Receivable, Nonaccrual Interest income: Interest and Dividend Income, Operating [Abstract] August 2007 issuance Subordinated Note Issued in August 2007 [Member] Represents information pertaining to subordinated notes issued in August, 2007. Total noninterest expense Noninterest Expense After-tax interest payment on federal tax refund Proceeds from Interest Income Tax Refund, Federal Amount of interest income received from federal tax jurisdiction for refund of tax on income. Schedule of Financing Receivable By Collateral Type [Table] Schedule of Financing Receivable By Collateral Type [Table] Schedule of Financing Receivable By Collateral Type [Table] Segment Reporting Disclosure Segment Reporting Disclosure [Text Block] Proceeds from principal payments on direct finance leases Proceeds From Direct Finance Lease Payments Proceeds From Direct Finance Lease Payments Non-hedging derivative financial instruments Not Designated as Hedging Instrument [Member] Fair value measurements Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Payment Delay Payment Deferral [Member] Allowance for Credit Losses Allowance for Credit Losses [Text Block] Deposits Interest Expense, Deposits Increase (Decrease) in Shareholders' Equity Increase (Decrease) in Stockholders' Equity [Roll Forward] Data Processing Information Technology and Data Processing Unrealized Losses Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss [Abstract] Noninterest income: Noninterest Income [Abstract] Compensation Actually Paid vs. Total Shareholder Return Compensation Actually Paid vs. Total Shareholder Return [Text Block] Accumulated Other Comprehensive Loss Comprehensive Income (Loss) Note [Text Block] Weighted Average Weighted Average [Member] Fair Value, Recurring and Nonrecurring [Table] Fair Value, Recurring and Nonrecurring [Table] Mortgages held for sale Fair value carrying amount Loan, Mortgage, Held-for-Sale, Fair Value Disclosure Debt securities available-for-sale unobservable inputs (as a percent) Debt Securities, Available-for-Sale, Measurement Input Nonperforming Nonperforming Financial Instruments [Member] Entity Central Index Key Entity Central Index Key PEO Name PEO Name Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year [Member] Fair value measurements Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Proceeds from disposal of premises and equipment Proceeds from Sale of Buildings Loans sold or participated to others Proceeds from Loans Sold or Participated to Others The cash inflow from held-for-investment loans sold or participated to others. Construction equipment Construction Equipment Financing [Member] Portfolio segment of financing receivables related to construction equipment loans. Schedule of amortized cost of loans and leases, segregated by portfolio segment, credit quality rating and year of origination Financing Receivable Credit Quality Indicators [Table Text Block] Outstanding Aggregate Erroneous Compensation Amount Outstanding Aggregate Erroneous Compensation Amount Originations of loans held for sale, net of principal collected Payment for Origination, Loan, Mortgage, Held-for-Sale Other comprehensive income (loss): Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract] Noninterest-bearing demand Noninterest-Bearing Deposit Liabilities Arrangement Duration Trading Arrangement Duration Fair value of mortgage servicing rights at end of period Servicing Asset at Amortized Cost, Fair Value Schedule of amounts of non-hedging derivative financial instruments Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block] Cash paid (received) for: Cash Paid for [Abstract] Exercise Price Award Exercise Price Entity Filer Category Entity Filer Category Local Phone Number Local Phone Number Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Common stock, no par value (in dollars per share) Common Stock, No Par Value Schedule of Long Lived Assets Held-for-sale [Table] Long-Lived Asset, Held-for-Sale [Table] Stock Based Compensation Share-Based Payment Arrangement [Text Block] Up to 30 Days Maturity Less than 30 Days [Member] Balance, beginning of period Balance, end of period Off-Balance-Sheet, Credit Loss, Liability Schedule of the components of income from direct finance and operating lease equipment Schedule of the Components of Income from Direct Finance and Operating Lease Equipment [Table Text Block] [Table Text Block] for Tabular disclosure of the components of income from direct finance and operating lease equipment. Federal funds purchased and securities sold under agreements to repurchase Federal Funds Purchased and Securities Sold under Agreements to Repurchase ASSETS Assets [Abstract] Loans and Leases Receivable Evaluated for Impairment Loans and Leases Receivable Evaluated for Impairment Represents the amount of loans and leases where the internal credit quality grade is at or below a predetermined classification which are included in comprehensive analysis. Underlying Security Market Price Change Underlying Security Market Price Change, Percent Subordinated Borrowing [Line Items] Subordinated Borrowing [Line Items] Gross amounts Not Offset in the Statement of Financial Position Derivative Liability, Including Not Subject to Master Netting Arrangement, after Offset and Deduction [Abstract] Fair Value Measurements Fair Value Disclosures [Text Block] SHAREHOLDERS' EQUITY Equity, Attributable to Parent [Abstract] Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year [Member] Additions Servicing Asset at Amortized Cost, Additions Entity Address, Address Line One Entity Address, Address Line One Financing Receivable, Loan Modification [Table] Financing Receivable, Loan Modification [Table] Financing receivable, loan modification [Table] Schedule of amortized cost of loans and leases that were both experiencing financial difficulty and modified, with delinquency status. Financing Receivable, Modified [Table Text Block] Cost of 0 and 47,428 shares of common stock acquired for treasury for the three months ended June 30, 2026 and 2025, respectively and 338,356 and 54,982 shares of common stock acquired for treasury for the six months ended June 30, 2026 and 2025, respectively Treasury Stock, Value, Acquired, Cost Method Accumulated Other Comprehensive Income (Loss), Net AOCI Attributable to Parent [Member] 30 to 59 Days Past Due Financial Asset, 30 to 59 Days Past Due [Member] Investment Type Categorization [Domain] Investments [Domain] Current period gross charge-offs, revolving financing receivable converted to term loan Financing Receivable, Excluding Accrued Interest, Revolving, Converted to Term Loan, Writeoff Internal Credit Assessment [Axis] Internal Credit Assessment [Axis] Common stock matching contribution to Employee Stock Ownership and Profit Sharing Plan Stock Issued Credit spread assumption Measurement Input, Credit Spread [Member] Medium and heavy duty trucks Medium and Heavy Duty Trucks [Member] Represents information pertaining to medium and heavy duty trucks. Internal Credit Assessment [Domain] Internal Credit Assessment [Domain] Derivative Financial Instruments Derivative Instruments and Hedging Activities Disclosure [Text Block] Total Accruing Loans Financing Receivable Recorded Investment Accruing Loans Represents recorded investment in financing receivables that are accruing. Asset derivatives, Fair value Accrued income and other assets Derivative Asset, Subject to Master Netting Arrangement, before Offset Commitments to lend additional amounts Financing Receivable, Modified, Commitment to Lend Fair Value as of Grant Date Award Grant Date Fair Value Entity Registrant Name Entity Registrant Name Proceeds from sales and gross realized gains and losses Debt Securities, Available-for-Sale, Realized Gain (Loss) [Abstract] Undistributed earnings allocated to common stock Undistributed Earnings, Basic Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Direct placement municipal securities Municipal Bonds [Member] Financing Receivable originated four years prior to current fiscal year Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year Discount rate (as a percent) Alternative Investment, Measurement Input Salaries and employee benefits Labor and Related Expense Schedule of Servicing Assets at Amortized Value [Table] Servicing Asset at Amortized Cost [Table] Dilutive effect of stock compensation (in shares) Incremental Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangements Depreciation of premises and equipment Depreciation, Nonproduction Fair Value Measurement with Unobservable Inputs Reconciliation Recurring Basis Asset Maturities Maturities Fair Value Measurement with Unobservable Inputs Reconciliation Recurring Basis Asset Maturities Amount of maturities of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. Total unrecognized compensation cost related to non-vested share-based compensation arrangements Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount Federal funds sold and interest bearing deposits with other banks Federal Funds Sold and Interest Bearing Deposits in Banks This element represents 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, and (4) yield maintenance dollar repurchase agreements. Also includes Federal Home Loan Bank cash and interest-bearing deposits with Federal Reserve Banks. In addition, this element also includes interest-bearing deposits in other financial institutions for relatively short periods of time including, for example, certificates of deposits, which are presented separately from cash on the balance sheet. Document Quarterly Report Document Quarterly Report Less than 12 Months Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months Total Assets measured at fair value Assets, Fair Value Disclosure Provision for credit losses Total provision for credit losses Provision for Loan, Lease, and Other Losses Number of available-for-sale debt securities in an unrealized loss position Debt Securities, Available-for-Sale, Unrealized Loss Position, Number of Positions Schedule of valuation methodology and unobservable inputs for Level 3 assets and liabilities measured at fair value on a recurring and non-recurring basis Fair Value Measurement Inputs and Valuation Techniques [Table Text Block] Deposits: Deposits [Abstract] Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] Total Past Due Financial Asset, Past Due [Member] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Other income Other Income [Member] Net (accretion) amortization of investment securities available-for-sale Accretion (Amortization) of Discounts and Premiums, Investments Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] New Accounting Pronouncements and Changes in Accounting Principles [Abstract] Accounting Standards Update and Change in Accounting Principle [Abstract] FDIC and other insurance Federal Deposit Insurance Corporation Premium and Other Insurance Expense This element represents the premium paid to the Federal Deposit Insurance Corporation for deposit insurance which is included in noninterest expense. Also includes other insurance expenses. Investment Type [Axis] Investment Type [Axis] Title Trading Arrangement, Individual Title Peer Group Total Shareholder Return Amount Peer Group Total Shareholder Return Amount Impaired loans - collateral based Impaired Loans Receivable, Fair Value Disclosure This item represents impaired loans receivable based on the fair value of the underlying collateral if repayment is expected solely from the collateral as presented on the statement of financial position which are due the Company as of the balance sheet date. Restatement Determination Date: Restatement Determination Date [Axis] Non-PEO NEO Non-PEO NEO [Member] Percentage of ownership interest Ownership Percentage The percentage of ownership interest of common stock or equity participation held by a shareholder of the entity. Due after five years through ten years Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Rolling after 5 through 10 Years, Amortized Cost Interest-bearing deposits: Deposits, by Type [Abstract] Overnight and Continuous Maturity Overnight [Member] Gross Unrealized Gains Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax Schedule of offsetting of financial assets and derivative assets Offsetting Assets [Table Text Block] Name Trading Arrangement, Individual Name Forward contracts - mortgage loan ForwardContractsMortgageLoanMember [Member] ForwardContractsMortgageLoanMember [Member] Award Type [Domain] Award Type [Domain] Noncontrolling interests Equity, Attributable to Noncontrolling Interest Equity Awards Adjustments Equity Awards Adjustments [Member] Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block] Lease Investments Leases Investments Disclosure [Text Block] The entire disclosure of lessor entity's leasing arrangements for direct finance and operating leases. Compensation Amount Outstanding Recovery Compensation Amount Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Total Fair Value Estimate of Fair Value Measurement [Member] Offsetting Assets [Table] Offsetting Assets [Table] Performing Performing Financial Instruments [Member] MNPI Disclosure Timed for Compensation Value MNPI Disclosure Timed for Compensation Value [Flag] Name Awards Close in Time to MNPI Disclosures, Individual Name Fair value measurements Fair Value, Option, Quantitative Disclosures [Line Items] Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] Reclassification adjustment for realized (gains) losses included in net income Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, before Tax Service charges on deposit accounts Deposit Account [Member] Amortized cost of loans and leases, segregated by portfolio segment, with delinquency aging and nonaccrual status Financing Receivable, Past Due [Line Items] Contractual maturities of investments in debt securities available-for-sale, Fair Value Debt Securities, Available-for-Sale, Maturity, Fair Value, Rolling Maturity [Abstract] Cost of common stock in treasury (4,123,848 shares at June 30, 2026 and 3,836,656 shares at December 31, 2025) Treasury Stock, Value Financial Instruments [Domain] Financial Instruments [Domain] Purchases Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases Income Statement Location [Axis] Statement of Income Location, Balance [Axis] Auto and light truck Auto, And Light, Truck [Member] Portfolio segment of financing receivables related to auto and light truck loans. Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract] Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract] Investment Securities Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] Aggregate Pension Adjustments Service Cost Aggregate Pension Adjustments Service Cost [Member] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Repurchase Agreements and Similar Transactions, Maturity Periods [Domain] Repurchase Agreements and Similar Transactions, Maturity Periods [Domain] Minimum Minimum [Member] Net interest income after provision for credit losses Interest Income (Expense), after Provision for Loan Loss Unrealized gains and losses on available-for-sale securities AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-Sale, Parent [Member] Cash collateral received Derivative Asset, Subject to Master Netting Arrangement, Collateral, Obligation to Return Cash Not Offset Interest expense: Interest Expense, Operating and Nonoperating [Abstract] Changes in valuation allowance Valuation Allowance for Impairment of Recognized Servicing Assets [Roll Forward] Basis of Presentation Consolidation, Subsidiaries or Other Investments, Consolidated Entities, Policy [Policy Text Block] Trade publications and auction values Trade Publications and Auction Values Valuation Technique [Member] Represents trade publications and auction values valuation technique used to measure fair value. Allowance for credit losses Accounts, Notes, Loans and Financing Receivable [Line Items] Company Selected Measure Name Company Selected Measure Name Fair Value Measurement [Domain] Fair Value Measurement [Domain] Schedule of financial instruments whose contract amounts represent credit risk Schedule of Fair Value, off-Balance-Sheet Risks [Table Text Block] Gross Amounts Offset in the Statement of Financial Position Derivative Liability, Subject to Master Netting Arrangement, Asset Offset Purchases of investment securities available-for-sale Payments to Acquire Debt Securities, Available-for-Sale Preferred stock; no par value Authorized 10,000,000 shares; none issued or outstanding Preferred Stock, Value, Issued Aggregate Available Trading Arrangement, Securities Aggregate Available Amount U.S. States and political subdivisions securities US States and Political Subdivisions Debt Securities [Member] Accrued interest payable Interest Payable Financing Receivable originated one year prior to current fiscal year Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] Changes in mortgage servicing assets Servicing Asset at Amortized Cost, Balance [Roll Forward] Equipment owned under operating leases, net Property, Plant, and Equipment, Lessor Asset under Operating Lease, after Accumulated Depreciation Financial Asset, Period Past Due [Axis] Financial Asset, Aging [Axis] All Executive Categories All Executive Categories [Member] Collateral [Domain] Collateral [Domain] Collateral Held [Domain] Schedule Of Available For Sale Debt Securities [Line Items] Schedule Of Available For Sale Debt Securities [Line Items] [Line Items] for Schedule Of Available For Sale Debt Securities [Table] Common stock; no par value Authorized 40,000,000 shares; issued 28,205,674 at June 30, 2026 and December 31, 2025 Common Stock, Value, Issued 90 Days or More Past Due and Accruing Financing Receivable, 90 Days or More Past Due, Still Accruing Loans and leases Interest and Fee Income, Loans and Leases Commitments and Financial Instruments with Off-Balance-Sheet Risk Commitments and Contingencies Disclosure [Text Block] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Distributed earnings allocated to common stock Distributed Earnings Diluted weighted average common shares outstanding (in shares) Weighted average shares outstanding for diluted earnings per common share Weighted Average Number of Shares Outstanding, Diluted Schedule of proceeds from sales of available-for-sale debt securities portfolio and gross realized gains and losses from the available-for-sale debt securities portfolio Realized Gain (Loss) on Investments [Table Text Block] Total fair value of options vested and expensed Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested in Period, Fair Value Current period gross charge-offs, financing receivable originated during current fiscal year Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year, Writeoff Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Impaired loans Impaired Loans [Member] Details pertaining to loans impaired. Comprehensive income (loss) Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Depreciation - leased equipment Depreciation of equipment owned and leased to others Depreciation, Lessor Asset under Operating Lease Entity Small Business Entity Small Business Cash and due from banks Cash and Due from Banks Excluding Federal Home Loan Bank Cash Fair Value Disclosure This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. For banks and other depository institutions: It includes cash on hand (currency and coin), cash items in process of collection, noninterest bearing deposits due from other financial institutions (including corporate credit unions), and balances with the Federal Reserve Banks and central banks. Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] Noncontrolling Interests Noncontrolling Interest [Member] Preferred stock, outstanding shares (in shares) Preferred Stock, Shares Outstanding Document Transition Report Document Transition Report Recent Accounting Pronouncements Accounting Standards Update and Change in Accounting Principle [Text Block] Underlying Securities Award Underlying Securities Amount Gross realized gains Debt Securities, Available-for-Sale, Realized Gain Number of classes existing in loan and lease portfolio Number of Classes Existing in Loans and Leases Receivable Portfolio Represents the number of classes existing in loan and lease portfolio. Equity Component [Domain] Equity Component [Domain] Document Period End Date Document Period End Date PEO Actually Paid Compensation Amount PEO Actually Paid Compensation Amount Loan commitments Loan Purchase Commitments [Member] Income Taxes Income Tax Disclosure [Text Block] Maturity date of subordinated notes Maturity Date of Junior Subordinated Debenture Owed to Unconsolidated Subsidiary Trust Maturity date of junior subordinated long-term debt owed to unconsolidated subsidiary trusts. Net change in time deposits Increase (Decrease) in Time Deposits Period of amortization to reach equity position in collateral PeriodOfAmortizationToReachEquityPositionInCollateral Period of amortization to reach equity position in collateral Awards Close in Time to MNPI Disclosures, Table Awards Close in Time to MNPI Disclosures [Table Text Block] 60 to 89 Days Past Due Financial Asset, 60 to 89 Days Past Due [Member] Hedging Designation [Axis] Hedging Designation [Axis] Amortized cost of collateral-dependent loans and leases Schedule of Financing Receivable By Collateral Type [Line Items] Schedule of Financing Receivable By Collateral Type [Line Items] Other Other Interest and Dividend Income Loan amortization period LoanAmortizationPeriod Loan amortization period Net Amount Derivative Asset, Including Not Subject to Master Netting Arrangement, after Offset and Deduction Total equity Balance Balance Equity, Including Portion Attributable to Noncontrolling Interest Expected amortization expense on mortgage servicing rights Servicing Asset at Amortized Value Expected Amortization [Abstract] -- None. No documentation exists for this element. -- Document Type Document Type Level 3 Fair Value, Inputs, Level 3 [Member] Earnings Per Share Earnings Per Share [Text Block] Name Outstanding Recovery, Individual Name Net Amount Derivative Liability, Including Not Subject to Master Netting Arrangement, after Offset and Deduction Product and Service [Axis] Product and Service [Axis] Derivative Contract Type [Domain] Derivative Contract [Domain] Current period gross charge-offs, revolving financing receivable Financing Receivable, Excluding Accrued Interest, Revolving, Writeoff Trust and wealth advisory, service charges on deposit accounts, and debit card income Revenue from Contract with Customer, Excluding Assessed Tax Gross realized losses Debt Securities, Available-for-Sale, Realized Loss All Individuals All Individuals [Member] Residential real estate and home equity Residential Real Estate [Member] Collateral based measurements Collateral Based Measurements Valuation Technique [Member] Represents the collateral based measurements used to measure fair value. Fair Value Disclosures [Abstract] Fair Value Disclosures [Abstract] Purchases of premises and equipment Payments to Acquire Property, Plant, and Equipment Name Forgone Recovery, Individual Name Statistical Measurement [Axis] Statistical Measurement [Axis] Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested [Member] Mortgage banking Mortgage Banking Income The noninterest income derived from mortgage banking activities including servicing fees. Also includes the gain/loss on sale of loans. In addition, includes the adjustment to the carrying value of the rights retained or purchased to service mortgages. These adjustments are made on a lower of cost or market value basis. Expected life of underlying collateral ExpectedLifeOfUnderlyingCollateral Expected life of underlying collateral Amount Reclassified from Accumulated Other Comprehensive Income Reclassification out of Accumulated Other Comprehensive Income [Member] Repurchase agreements Securities Sold under Agreements to Repurchase [Member] Current period gross charge-offs, financing receivable originated one year prior to current fiscal year Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff Nonaccrual with No Allowance for Credit Losses Financing Receivable, Nonaccrual, No Allowance Valuation Methodology Fair Value Measurement Inputs and Valuation Techniques [Line Items] Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Transfers and Servicing of Financial Assets [Abstract] Transfers and Servicing of Financial Assets [Abstract] Expense for payments of personal property taxes on operating leased equipment Expense Related to Personal Property Tax Payments on Operating Leases Expense related to personal property tax payments on operating leased equipment. Peer Group Issuers, Footnote Peer Group Issuers, Footnote [Text Block] Current period gross charge-offs, financing receivable originated four years prior to current fiscal year Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff Due after one year through five years Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Rolling after One Through Five Years, Fair Value Net earnings allocated to common stock Net Income (Loss) Available to Common Stockholders, Basic Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Other comprehensive income (loss), net of tax Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Combination Payment Delay and Term Extension Extended Maturity and Interest Rate Reduction [Member] Schedule of amounts included in the consolidated statements of income for non-hedging derivative financial instruments Derivative Instruments, Gain (Loss) [Table Text Block] Other Increase (Decrease) in Other Operating Assets and Liabilities, Net Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Appraisals Appraisals Valuation Technique [Member] Represents the appraisals valuation technique used to measure fair value. Level 1 Fair Value, Inputs, Level 1 [Member] Preferred stock, par value per share (in dollars per share) Preferred Stock, No Par Value Diluted net income per common share (in dollars per share) Diluted earnings per common share (in dollars per share) Earnings Per Share, Diluted Net earnings allocated to participating securities Participating Securities, Distributed and Undistributed Earnings (Loss), Basic Erroneously Awarded Compensation Recovery Erroneously Awarded Compensation Recovery [Table] Net change in equipment owned under operating leases Payments for (Proceeds from) Equipment Owned under Operating Leases This element represents the net cash inflow (outflow) for the change in the beginning and end of period of equipment owned under contractual arrangements classified as operating leases. Reclassification Out of Accumulated Other Comprehensive Income [Axis] Reclassification out of Accumulated Other Comprehensive Income [Axis] Title of 12(b) Security Title of 12(b) Security Non-cash transactions: Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] Due in one year or less Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Rolling within One Year, Amortized Cost Other expense Other Expense [Member] Loan modifications to borrowers experiencing financial difficulties Financing Receivable, Excluding Accrued Interest, Modified in Period, Amount Furniture and equipment Furniture and Equipment Expense This element represents equipment expense including depreciation, repairs, rentals, and service contract costs. This item also includes equipment purchases which do not qualify for capitalization in accordance with the entity's accounting policy. This item also includes furniture expenses, software maintenance, software license fees and computer processing costs such as website maintenance. Discount for lack of marketability and current conditions Measurement Input Discount For Lack of Marketability and Current Conditions [Member] Measurement input using amount by which value of business ownership interest is reduced to reflect lack of ability to convert business interest into cash quickly with the impact of current conditions. Commercial loans Commercial Loan [Member] Treasury Stock, Common (in shares) Treasury Stock, Common, Shares Per common share: Earnings Per Share [Abstract] Investments, Debt and Equity Securities [Abstract] Investments, Debt and Equity Securities [Abstract] Interest rate (as a percent) Subordinated Borrowing, Interest Rate Variable interest entity, not primary beneficiary Variable Interest Entity, Not Primary Beneficiary [Member] Number of executive stock award plans Share Based Compensation Arrangement by Share Based Payment Award, Number of Executive Stock Award Plans Represents the number of active executive stock award plans. Net change in other investments Payments for (Proceeds from) Other Investments This element includes the following: (1) The net cash inflow (outflow) in Interest-bearing Deposits by banks in other financial institutions for periods of time exceeding 3 months including, for example, certificates of deposits. (2) The net cash outflow or inflow of Federal Home Loan Bank Stock during the period. Federal Home Loan Bank (or Federal Reserve Bank) stock is an equity interest in a Federal Home Loan Bank (or Federal Reserve Bank). Term Extension Extended Maturity [Member] Current period gross charge-offs, financing receivable originated two years prior to current fiscal year Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff Short-term Debt, Type [Axis] Short-Term Debt, Type [Axis] Changes in the fair value of Level 3 assets measured on a recurring basis Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Income Taxes Income Taxes Paid, Net Common stock acquired for treasury (in shares) Treasury Stock, Shares, Acquired Loan commitments to extend credit Commitments to Extend Credit [Member] Mortgage loan contractual servicing fees, including late fees and ancillary income Contractually Specified Servicing Fee, Late Fee, and Ancillary Fee Earned in Exchange for Servicing Financial Asset Award Timing Disclosures [Line Items] Mortgage Servicing Rights Servicing Asset at Amortized Cost [Line Items] Measurement Frequency [Domain] Measurement Frequency [Domain] Net change in partnership investments Payments for (Proceeds from) Limited Partnership Credit Quality Grades 7-12 Internally Assigned Grade 7 to 12 [Member] Represents internally generated quality grades indicating the bottom end of quality rankings, such that a credit quality grade of 7 is defined as watch and contains greater than average credit risk; grade 8 credits are defined as having potential weaknesses that deserve management's close attention; grades 9 and 10 are considered substandard; grade 11 is doubtful; and grade 12 is a loss. Transfer of Certain Financial Assets Accounted for as Secured Borrowings Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items] Amortization Servicing Asset at Amortized Cost, Amortization Due after five years through ten years Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Rolling after 5 through 10 Years, Fair Value Total loans and leases Total loans and leases Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss Number of stock-based employee compensation plans Share Based Compensation Arrangement by Share Based Payment Award, Plan Number Represents the number of active stock-based employee compensation plans. Schedule of Fair Value, Off-balance Sheet Risks [Table] Fair Value, off-Balance-Sheet Risk [Table] Loan Restructuring Modification [Domain] Loan Restructuring Modification [Domain] Distributions to noncontrolling interests Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders Net loans and leases Net loans and leases Financing Receivable, Excluding Accrued Interest, after Allowance for Credit Loss Proceeds from the sales of loans held for sale Proceeds from Sale, Loan, Mortgage, Held-for-Sale Net income Net income Net Income (Loss) Attributable to Parent Expiration Date Trading Arrangement Expiration Date Net gain on sale of loans held for sale Gain (Loss) on Sale of Mortgage Loans Change in other liabilities Increase (Decrease) in Other Operating Liabilities Equipment rental Income related to lease payments Operating Lease, Lease Income, Lease Payments Stock issued under stock purchase plans Proceeds from Sale of Treasury Stock Preferred stock, authorized shares (in shares) Preferred Stock, Shares Authorized Acquisition of treasury stock Payments for Repurchase of Common Stock Adoption Date Trading Arrangement Adoption Date Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Net Income [Text Block] Financing Receivable, Past Due [Table] Financing Receivable, Past Due [Table] Entity Current Reporting Status Entity Current Reporting Status Receivables [Abstract] Receivables [Abstract] Net gain on sale of other real estate and repossessions Net Gain On Sale Of Other Real Estate And Repossessions The net gain resulting from sales of other real estate owned and repossessed assets. Schedule of the financial effect of loan and lease modifications to borrowers experiencing financial difficulties. Financing Receivable, Modified Weighted Average Table Text Block [Table Text Block] Financing Receivable, Modified Weighted Average Table Text Block Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Weighted Average Payment Delay (in months) FinancingReceivableModifiedWeightedAveragePaymentDelayFromModification FinancingReceivableModifiedWeightedAveragePaymentDelayFromModification Financing activities: Cash Provided by (Used in) Financing Activity, Continuing Operation [Abstract] Collateral [Axis] Collateral Held [Axis] Consolidated Entities [Domain] Consolidated Entities [Domain] Schedule of offsetting of financial liabilities and derivative liabilities Offsetting Liabilities [Table Text Block] Retained earnings Retained Earnings (Accumulated Deficit) Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement Derivative Liability, Gross Liability Including Not Subject to Master Netting Arrangement Net change in demand deposits and savings accounts Increase (Decrease) in Demand Deposits and Savings Accounts The net cash inflow or outflow in the total of all demand deposits and savings account deposits, classified as cash flows from financing activities. Financial Instruments Derivative Liability, Security Sold under Agreement to Repurchase, and Security Loaned, Subject to Master Netting Arrangement, after Offset Financial Instrument [Axis] Financial Instrument [Axis] Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested [Member] Executive Category: Executive Category [Axis] 12 months or Longer Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss Current Fiscal Year End Date Current Fiscal Year End Date Less than 12 Months Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss Total deposits Deposits Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table [Member] Auction values Auction Values Valuation Technique [Member] Represents the auction values valuation technique used to measure fair value. Other Real Estate Owned, Measurement Input Other Real Estate Owned, Measurement Input Business development and marketing Business Development and Marketing Expense This element includes business development expense which involves the development of products and services, their delivery, design and their implementation. Business development includes a number of techniques designed to grow an economic enterprise. Such techniques include, but are not limited to, assessments of marketing opportunities and target markets, intelligence gathering on customers and competitors, generating leads for possible sales, follow-up sales activity, formal proposal writing and business model design. Business development involves evaluating a business and then realizing its full potential, using such tools as marketing, sales, information management and customer service. Also includes the total expense recognized in the period for promotion, public relations, and brand or product advertising. Statement [Table] Statement [Table] Net Amounts of Liabilities Presented in the Statement of Financial Position Derivative Liability Deferred income taxes Deferred Income Tax Expense (Benefit) Adjustments to reconcile net income to net cash provided by operating activities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity [Abstract] Other Other Noninterest Expense Reclassification Out of Accumulated Other Comprehensive Income [Domain] Reclassification out of Accumulated Other Comprehensive Income [Domain] Equity Awards Adjustments, Excluding Value Reported in Compensation Table Equity Awards Adjustments, Excluding Value Reported in the Compensation Table [Member] Loan Restructuring Modification [Axis] Loan Restructuring Modification [Axis] Medium and heavy duty truck Medium and Heavy Duty Truck [Member] Portfolio segment of financing receivables related to medium and heavy duty truck loans. Total unrealized losses Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss Commercial and agricultural Commercial and Agricultural Loans [Member] Portfolio segment of financing receivables related to commercial and agricultural loans. Variable Rate [Domain] Variable Rate [Domain] Schedule of assets and liabilities measured at fair value on a recurring basis Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Investment tax credits Investment Tax Credit June 2007 issuance Subordinated Note Issued in June 2007 [Member] Represents information pertaining to subordinated notes issued in June, 2007. Schedule of changes in investment securities available-for-sale Level 3 assets measured at fair value on a recurring basis Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] All Adjustments to Compensation All Adjustments to Compensation [Member] Fair Value, by Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping [Table] Interest Rate Reduction Contractual Interest Rate Reduction [Member] Amendment Flag Amendment Flag Collateral Pledged Collateral Pledged [Member] Accrued interest receivable on investment securities available-for-sale Debt Securities, Available-for-Sale, Accrued Interest, after Allowance for Credit Loss Schedule of amortized cost of loans and leases, segregated by portfolio segment, with delinquency aging and nonaccrual status Financing Receivable, Past Due [Table Text Block] Total interest-bearing deposits Interest-Bearing Deposit Liabilities Termination Date Trading Arrangement Termination Date Net change in financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] Measure: Measure [Axis] Allowance for loan and lease losses Allowance for loan and lease losses Balance at the beginning of the period Balance at the end of the period Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest Mortgages held for sale reported at fair value Mortgages Held For Sale [Member] Represents the mortgage loans to or from individuals classified as held-for-sale. Provision for credit losses - loans and leases Provision (recovery of provision) Financing Receivable, Credit Loss, Expense (Reversal) Receivable Type [Domain] Receivable [Domain] Valuation Approach and Technique [Axis] Valuation Approach and Technique [Axis] Repurchase agreements Financial Assets Sold under Agreements to Repurchase, Gross Including Not Subject to Master Netting Arrangement Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Table] Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Table] Basic weighted average common shares outstanding (in shares) Weighted average shares outstanding for basic earnings per common share Weighted Average Number of Shares Outstanding, Basic Unrecognized tax benefits that would affect the effective tax rate if recognized Unrecognized Tax Benefits that Would Impact Effective Tax Rate Schedule of reconciliation of the number of shares used in the calculation of basic and diluted earnings per common share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Schedule of reclassifications out of accumulated other comprehensive income Reclassification out of Accumulated Other Comprehensive Income [Table Text Block] Segment Reporting [Abstract] Stock options Equity Option [Member] Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Due after ten years Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Rolling after 10 Years, Fair Value Interest-bearing demand Demand Deposit Accounts Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Violation of Home Country Law, Amount Entity Tax Identification Number Entity Tax Identification Number Net (distributions to) contributions from noncontrolling interests ProceedsFromPaymentsToNoncontrollingInterests Amount of cash inflow (outflow) from (to) a noncontrolling interest. Excludes dividends paid to the noncontrolling interest. Discounted cash flows Valuation Technique, Discounted Cash Flow [Member] Current period gross charge-offs, financing receivable originated three years prior to current fiscal year Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff Mortgage-backed securities Debt Securities, Available-for-Sale, Maturity, without Single Maturity Date, Fair Value Schedule of unconsolidated variable interest entities Schedule of Variable Interest Entities [Table Text Block] Proceeds from sales of other real estate and repossessions Proceeds from Sale of Foreclosed Assets Gains (losses) on investment securities available-for-sale Gains (losses) on investment securities available-for-sale Debt Securities, Available-for-Sale, Realized Gain (Loss) Schedule of changes in allowance for credit losses on unfunded loan commitments AllowanceForCreditLossesOnUnfundedLoanCommitmentsTableTextBlack [Table Text Block] Tabular disclosure of allowance for credit losses on unfunded loan commitments Unrealized (depreciation) appreciation of available-for-sale securities OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment and Tax Forgone Recovery due to Expense of Enforcement, Amount Forgone Recovery due to Expense of Enforcement, Amount Stock-based compensation Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] Consolidated Entities [Axis] Consolidated Entities [Axis] Common stock, issued shares (in shares) Common Stock, Shares, Issued Renewable energy Renewable Energy Loans [Member] Portfolio segment of financial receivables related to renewable energy project loans. Classification of nonperforming loans, threshold period past due Loans and Leases Receivable Period Past Due Represents the threshold period past due used to classify loans as nonperforming. Use of Estimates in the Preparation of Financial Statements Use of Estimates, Policy [Policy Text Block] Aircraft Aircraft [Member] Portfolio segment of financing receivables related to aircraft loans. Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements Settlements Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements Mortgage-backed securities - Federal agencies Mortgage-Backed Security, Issued by US Government-Sponsored Enterprise [Member] Income tax effect Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent Net occupancy Occupancy, Net Trading Arrangement: Trading Arrangement [Axis] Total Shareholder Return Amount Total Shareholder Return Amount Excess of fair value carrying amount over (under) unpaid principal Fair Value, Option, Aggregate Differences, Loans and Long-Term Receivables Gross Amounts Offset in the Statement of Financial Position Derivative Asset, Subject to Master Netting Arrangement, Liability Offset Insider Trading Arrangements [Line Items] Financing Receivable originated five years prior to current fiscal year Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year Security Exchange Name Security Exchange Name Current Financial Asset, Not Past Due [Member] Total liabilities Unfunded capital and other commitments Liabilities Loan and Lease Financings Financing Receivables [Text Block] Percent of Total Segment of Financing Receivable Financing Receivable, Excluding Accrued Interest, Modified in Period, to Total Financing Receivables, Percentage Pension Adjustments Prior Service Cost Pension Adjustments Prior Service Cost [Member] Off-balance-sheet instruments Fair Value Disclosure, off-Balance-Sheet Risks, Amount, Liability Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Fair Value by Asset Class [Domain] Asset Class [Domain] Net change in loans and leases Payments for (Proceeds from) Loans and Leases Savings Deposits, Savings Deposits Total gains or losses (realized/unrealized): included in earnings Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings Offsetting Assets Offsetting Assets [Line Items] Derivative, Collateral, Right to Reclaim Securities Derivative Liability, Subject to Master Netting Arrangement, Collateral, Right to Reclaim Security Not Offset Subordinated notes Interest Expense, Trust Preferred Securities Statement [Line Items] Statement [Line Items] Variable Rate [Axis] Variable Rate [Axis] Rule 10b5-1 Arrangement Adopted Rule 10b5-1 Arrangement Adopted [Flag] Fair Value Measurement Inputs and Valuation Techniques [Table] Fair Value Measurement Inputs and Valuation Techniques [Table] Common Stock Common Stock [Member] Amortized cost of Investment Securities available-for-sale Debt Securities, Held-to-Maturity, Excluding Accrued Interest, after Allowance for Credit Loss Investment securities, available-for-sale, at fair value (amortized cost of $1,588,489 and $1,568,429 at June 30, 2026 and December 31, 2025, respectively) Total debt securities available-for-sale Investment securities available-for-sale Debt Securities, Available-for-Sale Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Non-NEOs Non-NEOs [Member] Unpaid principal balance Loan, Held-in-Portfolio, Principal Outstanding Corporate debt securities Corporate Debt Securities [Member] Other short-term borrowings Other Short-Term Borrowings Net change in cash and cash equivalents Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation