Trading Arrangements, by Individual Trading Arrangements, by Individual [Table] Trading Arrangement: Trading Arrangement [Axis] Maximum Maximum [Member] Portion at Fair Value Measurement Portion at Fair Value Measurement [Member] Derivative Assets Offsetting Derivative Assets [Abstract] Short-term Debt, Type [Axis] Short-Term Debt, Type [Axis] Title of 12(b) Security Title of 12(b) Security Net earnings allocated to common shareholders Net Income (Loss) Available to Common Stockholders, Diluted Subsequent Event Subsequent Event [Member] Schedule of Available-for-sale Securities [Table] Debt Securities, Available-for-Sale [Table] Carrying Amount Reported Value Measurement [Member] Summary of Assets and Liabilities Measured on a Non-Recurring Basis Fair Value Measurements, Nonrecurring [Table Text Block] Net charge-off Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff (Recovery) Adjustment to Compensation, Amount Adjustment to Compensation Amount Pledged Status [Axis] Pledged Status [Axis] Financial Instrument [Axis] Financial Instrument [Axis] Summary of Future Amortization of Intangible Assets Intangible Asset, Finite-Lived, and Capitalized Cost, Software to be Sold, Leased, or Marketed, Estimated Amortization Expense [Table Text Block] Summary of Assets Measured on a Recurring Basis Fair Value, Assets Measured on Recurring Basis [Table Text Block] Other comprehensive income (loss), net of reclassifications and tax Other Comprehensive Income (Loss), Net Of Tax, Portion Attributable to Parent, Excluding Gain (Loss) On Sale Of Securities And Settlements Other Comprehensive Income (Loss), Net Of Tax, Portion Attributable to Parent, Excluding Gain (Loss) On Sale Of Securities And Settlements Gross gains (losses) from sales of held to maturity Debt Security, Held-to-Maturity, Sold, Realized Gain (Loss) Time-Based Vesting Time-based Vesting [Member] Time-based Vesting [Member] Employee Benefit Plans Retirement Benefits [Text Block] Balance, January 1, 2026 Balance, September 30, 2026 Contract with Customer, Asset, after Allowance for Credit Loss Derivative Instrument [Axis] Derivative Instrument [Axis] Measurement Frequency [Axis] Measurement Frequency [Axis] U.S. Treasury and government agencies US Treasury and Government [Member] Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Investment Securities Securities Investment [Member] Total other investments at cost Other Investments, At Cost Other Investments, At Cost Doubtful Doubtful [Member] Deposits Deposit Liabilities Disclosures [Text Block] Leases [Abstract] Leases [Abstract] Other comprehensive income (loss): Other Comprehensive Income (Loss), Net of Tax [Abstract] Summary of Held-to-maturity Investment Securities Debt Securities, Held-to-Maturity [Table Text Block] Prior, charge-offs Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year, Writeoff Total unrealized loss Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss Prior Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year Other intangible assets Total other intangibles Intangible Asset, Excluding Goodwill, after Accumulated Amortization Cash and cash equivalents: Cash and Cash Equivalents [Abstract] January 1, 2026 (in shares) September 30, 2026 (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number Summary of Financing Receivables Modified Financing Receivable, Modified [Table Text Block] Retirement Benefits [Abstract] Retirement Benefits [Abstract] $100 or more Time Deposits, $100,000 or More Outstanding Aggregate Erroneous Compensation Amount Outstanding Aggregate Erroneous Compensation Amount Common shares issued under compensation plan for Boards of Directors Stock Issued During Period, Value, Compensation Plan Stock Issued During Period, Value, Compensation Plan Construction Construction Loans [Member] Number of reportable segments Number of Reportable Segments Customer Relationships Customer Relationships Customer Relationships [Member] Short-term Debt, Type [Domain] Short-Term Debt, Type [Domain] Debt securities, available-for-sale, amortized cost Amortized Cost Debt Securities, Available-for-Sale, Amortized Cost, Excluding Accrued Interest, before Allowance for Credit Loss Entity Address, City or Town Entity Address, City or Town Awarded (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period Money market deposit accounts Deposits, Money Market Deposits FHLB stock Federal Home Loan Bank Stock Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] Receivables [Abstract] Receivables [Abstract] Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Title of Individual with Relationship to Entity [Domain] Title and Position [Domain] Year ending December 31, 2028 Time Deposit Maturities, Year Two Originated fiscal year, charge-offs Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year, Writeoff Total acquisition-related intangibles Intangible Asset, Finite-Lived, after Accumulated Amortization Peer Group Total Shareholder Return Amount Peer Group Total Shareholder Return Amount Estimated residual values Residual Value of Leased Asset Level 2 Level 2 Fair Value, Inputs, Level 2 [Member] Total Shareholder Return Vs Peer Group Total Shareholder Return Vs Peer Group [Text Block] Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] 90 + Days 90+ Days Delinquent Financial Asset, Equal to or Greater than 90 Days Past Due [Member] Subsequent Event Type [Axis] Subsequent Event Type [Axis] Insurance income Insurance Commissions and Fees Weighted average receive rates Derivative, Average Variable Interest Rate Savings accounts Deposits, Savings Deposits Total other comprehensive income (loss), net of tax Other comprehensive income (loss), net of tax Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Total Time Deposit Liability, above US Insurance Limit Summary of Operating Lease Maturities Lessee, Operating Lease, Liability, to be Paid, Maturity [Table Text Block] Allowance for credit losses Allowance for credit losses Beginning balance Ending balance Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest Document Period End Date Document Period End Date Preferred stock, shares outstanding (in shares) Preferred Stock, Shares Outstanding Year ending December 31, 2028 Lessee, Operating Lease, Liability, to be Paid, Year Two Revolving Loans Converted to Term Financing Receivable, Excluding Accrued Interest, Revolving, Converted to Term Loan Other investments: Investments, All Other Investments [Abstract] Commercial loan swap fees Transaction Fee [Member] Fee charged to customer for a requested specified transaction Gross losses realized Debt Securities, Available-for-Sale, Realized Loss Treasury stock, at cost, $996,472 shares at September 30, 2026 and $1,215,120 shares at December 31, 2025 Treasury Stock, Common, Value Related tax benefit (expense) OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment, Tax Remaining three months ending December 31, 2026 Sales-Type and Direct Financing Leases, Payment to be Received, Remainder of Fiscal Year Lessee, Lease, Description [Line Items] Lessee, Lease, Description [Line Items] Federal income taxes paid Income Tax Paid, Federal, after Refund Received Accumulated other comprehensive loss, net of deferred income taxes Accumulated Other Comprehensive Income (Loss), Net of Tax Entity Shell Company Entity Shell Company Percentage of Total by Loan Category Financing Receivable, Excluding Accrued Interest, Modified in Period, to Total Financing Receivables, Percentage Debt securities, maturing 5 to 10 years, amortized cost Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Rolling after 5 through 10 Years, Amortized Cost Earnings Per Common Share Earnings Per Share [Text Block] Earnings Per Share [Abstract] Document Fiscal Period Focus Document Fiscal Period Focus Lease income Lease Income Peer Group Issuers, Footnote Peer Group Issuers, Footnote [Text Block] Total liabilities Liabilities Trading Symbol Trading Symbol Available-for-sale investment securities, at fair value (amortized cost of $934,740 at September 30, 2026 and $1,076,980 at December 31, 2025) Fair Value Debt securities Debt Securities, Available-for-Sale, Excluding Accrued Interest Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward] Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward] Net expenditures for premises and equipment Payments to Acquire Property, Plant, and Equipment Summary of Interest Rate Swaps Designated as Cash Flow Hedges Schedule of Interest Rate Derivatives [Table Text Block] Thereafter Sales-Type and Direct Financing Leases, Payment to be Received, After Year Four Sales-Type and Direct Financing Leases, Payment to be Received, After Year Four Financing Receivable, Allowance for Credit Loss [Line Items] Financing Receivable, Allowance for Credit Loss [Line Items] Company Selected Measure Name Company Selected Measure Name Purchases Payments to Acquire Debt Securities, Available-for-Sale Over 12 months Time Deposit Liability, above US Insurance Limit, Maturity, over 12 Months Fair Value of Assets and Liabilities Fair Value Measurement and Measurement Inputs, Recurring and Nonrecurring [Text Block] Interest on deposits Interest Expense, Deposits Debt securities, maturing 1 to 5 years, fair value Debt Securities, Held-to-Maturity, Fair Value, Maturity, Allocated and Single Maturity Date, after Year One Through Five Summary of Derivatives Not Designated as Hedging Derivatives Not Designated as Hedging Instruments [Table Text Block] Originated fiscal year Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year Non-compete agreements Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncompete Agreements Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncompete Agreements Aggregate credit exposure threshold Financing Receivable Loan Relationship Aggregate Credit Exposure Evaluation Threshold Financing Receivable Loan Relationship Aggregate Credit Exposure Evaluation Threshold Held-to-maturity securities, maturing over 10 years, weighted average yield Debt Securities, Held-to-Maturity, Weighted Average Yield, Maturity, after Year 10 Equity Valuation Assumption Difference, Footnote Equity Valuation Assumption Difference, Footnote [Text Block] Financing Receivable, Troubled Debt Restructuring [Line Items] Financing Receivable, Modified [Line Items] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] Effect of potentially dilutive common shares (in shares) Weighted Average Number of Shares Outstanding, Diluted, Adjustment Operating lease payments Operating Lease, Payments Award Timing Predetermined Award Timing Predetermined [Flag] Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] Level 1 Fair Value, Inputs, Level 1 [Member] Debt securities, maturing over 10 years, fair value Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Rolling after 10 Years, Fair Value Stock-based compensation Shares Granted, Value, Share-Based Payment Arrangement, after Forfeiture Available-for-sale investment securities: Available-for-sale investment securities: Debt Securities, Available-for-Sale [Abstract] Recognition of income previously deferred Contract With Customer, Liability, Revenue Recognized, Including Opening Balance Contract With Customer, Liability, Revenue Recognized, Including Opening Balance Residential mortgage-backed securities Residential Mortgage-Backed Securities [Member] Long-term borrowings Long-Term Debt, Fair Value Vesting [Domain] Vesting [Domain] Plan Name [Domain] Plan Name [Domain] ROU assets Operating Lease, Right-of-Use Asset Summary of Loans by Classification Schedule of Financing Receivables, Type [Table Text Block] Schedule of Financing Receivables, Type [Table Text Block] Debt securities, maturing within 1 year, amortized cost Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, Year One AOCI reclassified as reduction in interest expense, during next 12 months Interest Rate Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months, Net Derivative Liability, Statement of Financial Position [Extensible Enumeration] Derivative Liability, Statement of Financial Position [Extensible Enumeration] Fair Value Disclosures [Abstract] Fair Value Disclosures [Abstract] Securing additional borrowing capacity at the FHLB and the FRB Federal Home Loan Bank And Federal Reserve Bank [Member] Federal Home Loan Bank And Federal Reserve Bank [Member] Investment Securities Investment in Debt and Equity Securities and Other Trading Assets [Text Block] Cash dividends paid Payments of Ordinary Dividends, Common Stock Allowance for credit losses - leases Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Noncurrent Expiration Date Trading Arrangement Expiration Date Gross Unrealized Gains Debt Securities, Held-to-Maturity, Accumulated Unrecognized Gain Cash and cash equivalents Cash and Cash Equivalents, Fair Value Disclosure Year ending December 31, 2029 Sales-Type and Direct Financing Leases, Payment to be Received, Year Three Consumer, indirect Consumer, Indirect Loan [Member] Consumer loans originated by a third party. Aggregate Pension Adjustments Service Cost Aggregate Pension Adjustments Service Cost [Member] Derivative [Table] Derivative [Table] Proceeds from issuance of common shares Proceeds from Issuance of Common Stock Earnings per common share: Earnings Per Share Reconciliation [Abstract] Interest-bearing Interest-Bearing Deposit Liabilities Common stock, no par value (in usd per share) Common Stock, No Par Value Deposits Deposits, Fair Value Disclosure Commercial real estate, other Commercial real estate Commercial Real Estate [Member] Percent of loans considered current Percent of Loans Considered Current Percent of Loans Considered Current Investing activities: Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract] Unrecognized stock based compensation expense Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount Interest Rate Swap Interest rate swaps related to debt Interest rate swaps related to commercial loans Interest Rate Swap [Member] Transaction-based fees Transactional-based Fees For Deposit Accounts Transactional-based fees for deposit accounts, including insufficient funds, overdrafts, stop payment fees, etc. PEO Actually Paid Compensation Amount PEO Actually Paid Compensation Amount Deferred loan costs Deferred Costs Other Investments Carrying Value [Table] Other Investments Carrying Value [Table] Other Investments Carrying Value [Table] Cash dividends declared Dividends, Common Stock, Cash Total stockholders’ equity Beginning balance Ending balance Equity, Attributable to Parent Assets Assets [Abstract] Leases Leases Finance Leases Portfolio Segment [Member] Payment Deferral Payment Deferral [Member] Other investments Total other investments Other Investments Deposit Liability [Line Items] Deposit Liability [Line Items] Summary of Loans by Risk Category Financing Receivable Credit Quality Indicators [Table Text Block] Nonrecurring Basis Fair Value, Nonrecurring [Member] Professional fees Professional Fees Insider Trading Policies and Procedures [Line Items] Restricted common shares (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Number of operating segments Number of Operating Segments Summary of Goodwill Goodwill [Table Text Block] Leases Lessor, Direct Financing Leases [Text Block] Entity Central Index Key Entity Central Index Key Net interest income after provision for credit losses Interest Income (Expense), after Provision for Loan Loss Governmental deposit accounts Deposits, Governmental Deposits, Governmental Equity [Abstract] Equity [Abstract] 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] Other Stockholders' Equity, Other Lease income Sales-type Lease, Variable Lease Income Pledging Purpose [Axis] Pledging Purpose [Axis] Total acquisition-related intangibles Intangible Assets, Net (Excluding Goodwill And Servicing Rights) Intangible Assets, Net (Excluding Goodwill And Servicing Rights) Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Designated as Hedging Instrument Designated as Hedging Instrument [Member] Brokered Certificate of Deposit [Domain] Brokered Certificate of Deposit [Domain] Brokered Certificate of Deposit Financing Receivable, Troubled Debt Restructuring [Table] Financing Receivable, Modified [Table] 2006 Equity Plan Equity Plan 2006 [Member] Equity Plan 2006 [Member] Financing receivable, nonaccrual, no allowance Financing Receivable, Excluding Accrued Interest, Nonaccrual, No Allowance Restricted Shares Restricted Stock [Member] Accumulated Other Comprehensive Loss Accumulated Other Comprehensive (Loss) Income AOCI Attributable to Parent [Member] All Individuals All Individuals [Member] Period for recognition Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition Proceeds from sales Proceeds from Sale of Other Investments Statement [Line Items] Statement [Line Items] Total assets Assets Lessee, Operating Lease, Liability, Payment, Due [Abstract] Lessee, Operating Lease, Liability, to be Paid, Fiscal Year Maturity [Abstract] Term Extension Extended Maturity [Member] Total interest expense Interest Expense, Operating Weighted-Average Grant Date Fair Value Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract] Internal Credit Assessment [Domain] Internal Credit Assessment [Domain] Reclassification adjustment for net loss included in net income Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, before Tax Gross Unrealized Gains Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax Stock-Based Compensation Share-Based Payment Arrangement [Text Block] Net occupancy and equipment expense Occupancy, Net PEO PEO [Member] Non-interest-bearing Non-interest-bearing deposits Noninterest-Bearing Deposit Liabilities Net increase in non-interest-bearing deposits Net Change Noninterest-Bearing Deposits, Domestic Goodwill Goodwill, beginning of period Goodwill, end of period Goodwill Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Violation of Home Country Law, Amount Retained Earnings Retained Earnings [Member] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Award Timing Disclosures [Line Items] Summary of Financial Instruments Not Required to be Measured at Fair Value Fair Value, by Balance Sheet Grouping [Table Text Block] Earnings per common share - diluted (in usd per share) Diluted (in usd per share) Earnings Per Share, Diluted Internal Credit Assessment [Axis] Internal Credit Assessment [Axis] Federal Deposit Insurance Corporation ("FDIC") insurance expense Federal Deposit Insurance Corporation Premium Expense Amortization of other intangible assets Intangible Asset, Finite-Lived, Amortization Expense Interest on long-term borrowings Interest Expense, Long-Term Debt and Capital Securities Intangible Asset, Finite-Lived [Line Items] Intangible Asset, Finite-Lived [Line Items] Originated three years before fiscal year Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year Share-based Payment Arrangement [Abstract] Share-Based Payment Arrangement [Abstract] Revenue Revenue from Contract with Customer, Excluding Assessed Tax Summary of Cash Flow Hedges Schedule of Cash Flow Hedging Instruments, Statements of Financial Performance and Financial Position, Location [Table Text Block] Summary of Pledged Securities Schedule of Financial Instruments Owned and Pledged as Collateral [Table Text Block] Summary of Amortized Cost of Collateral Dependent Loans Financing Receivables, Collateral Dependent [Table Text Block] Financing Receivables, Collateral Dependent Summary of Sales Type Lease Income Sales-type Lease, Lease Income [Table Text Block] Assets: Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] Repurchase of common stock Stock Repurchased During Period, Value Equity Awards Adjustments, Footnote Equity Awards Adjustments, Footnote [Text Block] Total gross intangibles Intangible Asset, Excluding Goodwill, before Accumulated Amortization Deposit account service charges Deposit Account [Member] Summary of Gains or Losses Recorded in AOCI Schedule of Cash Flow Hedges Included in Accumulated Other Comprehensive Income (Loss) [Table Text Block] Debt securities, maturing 1 to 5 years, amortized cost Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Rolling after One Through Five Years, Amortized Cost Other non-interest income Noninterest Income, Other Title of Individual [Axis] Title and Position [Axis] Less: Dividends paid on unvested common shares Dividends Paid On Unvested Shares Dividends Paid On Unvested Shares Retail certificates of deposit ("CDs") Retail Retail Certificate of Deposit [Member] Retail Certificate of Deposit [Member] Income before income taxes Operating Income (Loss) Summary of Dividends Declared Dividends Declared [Table Text Block] Remaining three months ending December 31, 2026 Time Deposit Maturities, Remainder of Fiscal Year Amount of gains (losses) recorded in AOCI, pre-tax Other Comprehensive Income (Loss), Gain (Loss), before Reclassification and Tax Other Comprehensive Income (Loss), Gain (Loss), before Reclassification and Tax Premium finance Premium Finance Loan [Member] Premium Finance Loan Collateral [Axis] Collateral Held [Axis] Rule 10b5-1 Arrangement Adopted Rule 10b5-1 Arrangement Adopted [Flag] Revolving Loans Financing Receivable, Excluding Accrued Interest, Revolving Franchise tax expense Taxes, Other Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] Summary of Activity in Allowance for Loan and Lease Losses Financing Receivable, Allowance for Credit Loss [Table Text Block] Common stock, shares issued (in shares) Common stock, beginning of period (in shares) Common stock, end of period (in shares) Common Stock, Shares, Issued Debt securities, maturing within 1 year, amortized cost Debt Securities, Held-to-Maturity, Amortized Cost Excluding Accrued Interest, after Allowance for Credit Loss, Maturity, Allocated and Single Maturity Date, Year One 12 months or more, unrealized loss Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss Product and Service [Domain] Product and Service [Domain] Class of Stock [Line Items] Class of Stock [Line Items] Debt securities, maturing 1 to 5 years, amortized cost Debt Securities, Held-to-Maturity, Amortized Cost Excluding Accrued Interest, after Allowance for Credit Loss, Maturity, Allocated and Single Maturity Date, after Year One through Five Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Matching contributions Defined Contribution Plan, Cost Loans that subsequently defaulted Financing Receivable, Modified, Subsequent Default Year ending December 31, 2029 Lessee, Operating Lease, Liability, to be Paid, Year Three Held-to-maturity securities, maturing within 1 year, weighted average yield Debt Securities, Held-to-Maturity, Weighted Average Yield, Maturity, Year One Termination Date Trading Arrangement Termination Date Nonrecurring Fair Value, Recurring and Nonrecurring [Table] Total employee stock-based compensation expense Employees [Member] For the benefit of Peoples' employees Federal and state income tax rate Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent Compensation Actually Paid vs. Total Shareholder Return Compensation Actually Paid vs. Total Shareholder Return [Text Block] U.S. government sponsored agencies US Government-sponsored Enterprises Debt Securities [Member] Awards expiration period Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period Fair Value as of Grant Date Award Grant Date Fair Value Brokered Deposit [Axis] Brokered Deposit [Axis] Brokered Deposit Collateral Pledged Collateral Pledged [Member] Summary of Available-for-sale Securities with Unrealized Loss Debt Securities, Available-for-Sale, Unrealized Loss Position, Fair Value [Table Text Block] Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Arrangement Duration Trading Arrangement Duration Entity Address, Postal Zip Code Entity Address, Postal Zip Code Entity Registrant Name Entity Registrant Name Contract Liabilities Contract with Customer, Liability [Roll Forward] Contract with Customer, Liability Less than 12 months, unrealized loss Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss Non-interest income: Noninterest Income, Other [Abstract] Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] Gross intangibles Intangible Asset, Finite-Lived, before Accumulated Amortization Forgone Recovery due to Expense of Enforcement, Amount Forgone Recovery due to Expense of Enforcement, Amount Loan Restructuring Modification [Axis] Loan Restructuring Modification [Axis] Vesting period Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period Goodwill [Roll Forward] Goodwill [Roll Forward] Intangible Asset, Finite-Lived, Class [Domain] Intangible Asset, Finite-Lived, Class [Domain] Indefinite-Lived Trade Names Trade Names [Member] Award Type Award Type [Domain] Remaining three months ending December 31, 2026 Lessee, Operating Lease, Liability, to be Paid, Remainder of Fiscal Year Level 3 Level 3 Fair Value, Inputs, Level 3 [Member] Asset Pledged as Collateral Asset Pledged as Collateral [Member] Summary of Deposit Balances Deposit Balances [Table Text Block] Deposit Balances Purchase of treasury stock (in shares) Treasury Stock, Shares, Acquired 2027 Intangible Asset, Finite-Lived, Estimated Amortization Expense, Year One Operating lease term Lessee, Operating Lease, Term of Contract Restricted cash Restricted Cash Balance, January 1, 2026 Balance, September 30, 2026 Contract with Customer, Liability Debt securities held to maturity, allowance for credit loss Allowance for Credit Losses Debt Securities, Held-to-Maturity, Allowance for Credit Loss, Excluding Accrued Interest Year ending December 31, 2030 Sales-Type and Direct Financing Leases, Payment to be Received, Year Four Interest-bearing deposit accounts Interest-Bearing Domestic Deposit, Checking Home equity lines of credit Home Equity Line of Credit [Member] Additional deferred income Contract with Customer, Liability, Additions Contract with Customer, Liability, Additions Other assets Other Assets 30 - 59 days 30-59 Days Delinquent Financial Asset, 30 to 59 Days Past Due [Member] Summary of Defaulted Financing Receivables Modified Financing Receivable, Modified, Subsequent Default [Table Text Block] Brokered Brokered Certificate of Deposit, Net of Exclusions [Member] Brokered Certificate of Deposit, Net of Exclusions Lessee, Lease, Description [Table] Lessee, Lease, Description [Table] Common shares repurchased under share repurchase program Treasury Stock, Value, Acquired, Cost Method Cash and cash equivalents at beginning of period Cash and cash equivalents at end of period Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Reissuance of treasury stock for deferred compensation plan for Boards of Directors Stock Issued During Period, Value, Treasury Stock Reissued Schedule of Finite-Lived Intangible Assets [Table] Intangible Asset, Finite-Lived [Table] Non-NEOs Non-NEOs [Member] 2028 Intangible Asset, Finite-Lived, Estimated Amortization Expense, Year Two Cash dividends declared Dividends, Cash Debt securities, maturing over 10 years, amortized cost Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Rolling after 10 Years, Amortized Cost Leases Lessee, Operating Leases [Text Block] Thereafter Time Deposit Maturities, After Year Four Time Deposit Maturities, After Year Four Purchase of treasury stock under share repurchase program Payments for Repurchase of Common Stock Statistical Measurement [Axis] Statistical Measurement [Axis] Award Type [Axis] Award Type [Axis] Net gain (loss) arising during the period Pre-tax changes in fair value included in AOCI Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification and Tax Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Available-for-sale Debt Securities, Available-for-Sale, Amortized Cost, Excluding Accrued Interest, after Allowance for Credit Loss Retained earnings Retained Earnings (Accumulated Deficit) Product and Service [Axis] Product and Service [Axis] Equity investment securities Equity investment securities Equity Securities, FV-NI Net effect on other comprehensive income (loss) Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax, Parent Less than 12 months, no. of securities Held-to-Maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Less than 12 Months, Number of Positions Held-to-Maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Less than 12 Months, Number of Positions Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Common Shares Common Shares Common Stock [Member] Performance-based commissions Performance-based Insurance Commissions Performance-based Insurance Commissions Operating lease expense Operating Lease, Cost Shares issued under compensation plan for Boards of Directors (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Shares Issued in Period Originated four years before fiscal year, charge-offs Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff Intangible Asset, Finite-Lived, after Accumulated Amortization, Estimated Amortization Expense, Fiscal Year Maturity [Abstract] Intangible Asset, Finite-Lived, after Accumulated Amortization, Estimated Amortization Expense, Fiscal Year Maturity [Abstract] Derivative Contract [Domain] Derivative Contract [Domain] Total Total Delinquent Financial Asset, Past Due [Member] Net loss realized Debt Securities, Available-for-Sale, Realized Gain (Loss) Total liabilities and stockholders’ equity Liabilities and Equity Variable lease expense Variable Lease, Cost Employee Stock Option Share-Based Payment Arrangement, Option [Member] Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Performance-Based Vesting Performance-based Vesting [Member] Performance-based Vesting [Member] Tabular List, Table Tabular List [Table Text Block] Vesting [Axis] Vesting [Axis] Securing public and trust department deposits, and repurchase agreements Deposits And Repurchase Agreements [Member] Deposits And Repurchase Agreements [Member] Summary of Held-to-maturity Securities with Unrealized Loss Unrealized Gain (Loss) on Investments [Table Text Block] Available-for-sale securities, maturing 5 to 10 years, weighted average yield Debt Securities, Available-for-Sale, Maturity, Rolling after 5 through 10 Years, Weighted Average Yield Purchases Payments to Acquire Held-to-Maturity Securities 2029 Intangible Asset, Finite-Lived, Estimated Amortization Expense, Year Three Remaining three months of 2026 Intangible Asset, Finite-Lived, Estimated Amortization Expense, Remainder of Fiscal Year Unrealized loss Equity Securities, FV-NI, Unrealized Loss Name Awards Close in Time to MNPI Disclosures, Individual Name 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] Debt securities, maturing 1 to 5 years, fair value Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Rolling after One Through Five Years, Fair Value Transfers from total loans to other real estate owned Real Estate Owned, Transfer to Real Estate Owned Preferred shares, no par value, $50,000 shares authorized, no shares issued at September 30, 2026 or at December 31, 2025 Preferred Stock, Value, Issued Adjustment to Compensation: Adjustment to Compensation [Axis] Brokerage income Brokerage Income [Member] Brokerage Income [Member] Weighted average pay rates Derivative, Average Fixed Interest Rate Federal Home Loan Bank ("FHLB") stock Investment in Federal Home Loan Bank Stock, Fair Value Disclosure Summary of Sales Type Lease Maturity Sales-Type and Direct Financing Leases, Payment to be Received, Maturity [Table Text Block] Commission and fees from sale of insurance policies Commission And Fees From Sale Of Insurance Policies Commission And Fees From Sale Of Insurance Policies Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Interest paid Interest Paid, Excluding Capitalized Interest, Operating Activity Hedging Designation [Axis] Hedging Designation [Axis] 60 - 89 days 60-89 Days Delinquent Financial Asset, 60 to 89 Days Past Due [Member] Name Measure Name Pay vs Performance Disclosure [Line Items] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Less than 12 months, Number of securities Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions Interest and fees on loans and leases Interest and Fee Income, Financing Receivable Indefinite-lived Intangible Assets [Axis] Intangible Asset, Indefinite-Lived, Class [Axis] Interest receivable Interest Receivable Name Trading Arrangement, Individual Name Total cash and cash equivalents Cash and Cash Equivalent Interest and fees on leases Sales-type Lease, Interest Income, Lease Receivable Cash pledged to peoples from counterparties Cash Pledged To Peoples From Counterparties Cash Pledged To Peoples From Counterparties Repurchase of treasury stock in connection with employee incentive program and compensation plan for Boards of Directors Repurchase Of Common Shares In Connection With Employee Incentive And Director Compensation Plans Repurchase Of Common Shares In Connection With Employee Incentive And Director Compensation Plans Operating lease expense Operating Lease, Expense Net loss on investment securities Debt and Equity Securities, Gain (Loss) Company Selected Measure Amount Company Selected Measure Amount Employee stock purchase plan discount Employee Stock Purchase Plan Discount Employee Stock Purchase Plan Discount Restricted shares (in shares) Shares Issued, Shares, Share-Based Payment Arrangement, after Forfeiture Schedule of Accounts, Notes, Loans and Financing Receivable [Table] Accounts and Financing Receivables [Table] Weighted-average remaining lease term Operating Lease, Weighted Average Remaining Lease Term Non-PEO NEO Non-PEO NEO [Member] Total non-interest expense Noninterest Expense Non-employee director stock-based compensation expense Non-employee Directors [Member] Non-employee Directors [Member] Award Timing Method Award Timing Method [Text Block] Available-for-sale securities that had an unrealized loss: Available-for-Sale Securities, Continuous Unrealized Loss Position, Qualitative Disclosure [Abstract] Net increase (decrease) in cash and cash equivalents Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation Interest rate cash flow gains reclassified into earnings Interest Rate Cash Flow Hedge Gain (Loss) Reclassified to Earnings, Net Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Derivative liability, notional amount Derivative Liability, Notional Amount Net income Net income Net income available to common shareholders Net Income (Loss) Attributable to Parent Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Restatement Determination Date: Restatement Determination Date [Axis] Summary of Accumulated Other Comprehensive (Loss) Income Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block] Statistical Measurement [Domain] Statistical Measurement [Domain] Document Fiscal Year Focus Document Fiscal Year Focus Netting Adjustments Derivative Liability, Subject to Master Netting Arrangement, Asset Offset Net stock-based compensation expense Share-Based Payment Arrangement, Expense, after Tax Brokered deposits Brokered Deposit [Member] Brokered Deposit Preferred stock, no par value (in usd per share) Preferred Stock, No Par Value Number of Common Shares Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Total deposits Deposits Common shares, no par value, $50,000,000 shares authorized, $36,868,595 shares issued at September 30, 2026 and $36,836,943 shares issued at December 31, 2025, including at each date shares held in treasury Common Stock, Value, Issued Year ending December 31, 2027 Lessee, Operating Lease, Liability, to be Paid, Year One Summary of Restricted Shares Activity Share-Based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity [Table Text Block] Services transferred over time Transferred over Time [Member] Communication expense Communication Restatement Determination Date Restatement Determination Date Debt securities, maturing 5 to 10 years, fair value Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Rolling after 5 through 10 Years, Fair Value Other non-interest expense Other Noninterest Expense Electronic banking expense Electronic banking expense Electronic banking expense includes bankcard and internet-based banking costs. Total loans modified Financing Receivable, Excluding Accrued Interest, Modified, after 12 Months Amendment Flag Amendment Flag Federal Reserve Bank ("FRB") stock FRB stock Federal Reserve Bank Stock Gross Unrealized Losses Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax Brokered Certificate of Deposit [Axis] Brokered Certificate of Deposit [Axis] Brokered Certificate of Deposit [Axis] Held-to-maturity securities, total weighted average yield Debt Securities, Held-to-Maturity, Weighted Average Yield Timing of Transfer of Good or Service [Domain] Timing of Transfer of Good or Service [Domain] Adjustment to Non-PEO NEO Compensation Footnote Adjustment to Non-PEO NEO Compensation Footnote [Text Block] Other real estate owned Other Real Estate, Foreclosed Assets, and Repossessed Assets Entity Address, State or Province Entity Address, State or Province Nonaccrual Financing Receivable, Excluding Accrued Interest, Nonaccrual PEO Total Compensation Amount PEO Total Compensation Amount Assets: Assets, Fair Value Disclosure [Abstract] Year ending December 31, 2027 Time Deposit Maturities, Year One Share Repurchase Program [Domain] Share Repurchase Program [Domain] Notional amount Derivative, Notional Amount Weighted-average number of common shares outstanding - basic (in shares) Weighted-average common shares outstanding (in shares) Weighted Average Number of Shares Outstanding, Basic Non-interest expense: Other Expenses [Abstract] Fair Value Fair Value, by Balance Sheet Grouping [Table] Year ending December 31, 2030 Lessee, Operating Lease, Liability, to be Paid, Year Four Interest-bearing deposits in other banks Interest-Bearing Deposits in Banks and Other Financial Institutions Receipt of income previously receivable Increase (Decrease) in Deferred Revenue Retail Certificate of Deposit [Axis] Retail Certificate of Deposit [Axis] Retail Certificate of Deposit [Axis] Total non-interest income Noninterest Income Revenue from contract with customer Revenue from Contract with Customer, Including Assessed Tax Purchase of FRB stock Payments to Acquire Federal Home Loan Bank Stock Less than $100 Time Deposits, Less than $100,000 Loans and Leases Loans, Notes, Trade and Other Receivables Disclosure [Text Block] Time deposits Total CDs Time Deposits Award Timing MNPI Disclosure Award Timing MNPI Disclosure [Text Block] Released (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period Class of Stock [Axis] Class of Stock [Axis] Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Debt Securities, Held-to-maturity [Table] Debt Securities, Held-to-Maturity [Table] Common shares issued under dividend reinvestment plan Stock Issued During Period, Value, Dividend Reinvestment Plan Accumulated amortization Intangible Asset, Finite-Lived, Accumulated Amortization Receivable [Domain] Receivable Receivable [Domain] Share Repurchase Program Authorized On January 28, 2021 Share Repurchase Program Authorized On January 28, 2021 [Member] Share Repurchase Program Authorized On January 28, 2021 Banking and Thrift, Other Disclosures [Abstract] Banking and Thrift, Other Disclosure [Abstract] Net loans and leases Financing Receivable, Excluding Accrued Interest, after Allowance for Credit Loss Additional income receivable Contract With Customer, Asset, Increase In Additional Income Receivable Contract With Customer, Asset, Increase In Additional Income Receivable New Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Related tax (expense) benefit Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, Tax Year ending December 31, 2027 Sales-Type and Direct Financing Leases, Payment to be Received, Year One Derivative asset, fair value Interest Rate Derivative Assets, at Fair Value Shares issued under dividend reinvestment plan (in shares) Stock Issued During Period, Shares, Dividend Reinvestment Plan Long-term borrowings Long-Term Debt Originated two years before fiscal year Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year Summary of Sales Type Leases Sales-type and Direct Financing Leases, net investments [Table Text Block] Sales-type and Direct Financing Leases, net investments Less than 12 months, unrealized loss Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss Net cash provided by (used in) investing activities Cash Provided by (Used in) Investing Activity, Including Discontinued Operation Equity Awards Adjustments, Excluding Value Reported in Compensation Table Equity Awards Adjustments, Excluding Value Reported in the Compensation Table [Member] Debt securities, maturing 5 to 10 years, fair value Debt Securities, Held-to-Maturity, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 5 Through 10 Stockholders' Equity Equity [Text Block] Security Exchange Name Security Exchange Name Promotional and usage income Promotional And Usage Electronic Banking Income Promotional And Usage Electronic Banking Income Carrying Amount Amortized Cost Amortized Cost Debt Securities, Held-to-Maturity, Excluding Accrued Interest, before Allowance for Credit Loss 12 months or more, no. of securities Held-to-Maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, 12 Months or Longer, Number of Positions Held-to-Maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, 12 Months or Longer, Number of Positions Net investment in leases Financing Receivable, before Allowance for Credit Loss Over 6 to 12 months Time Deposit Liability, Uninsured, Maturity, over 6 Months through 12 Months 12 months or more, fair value Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer Operating Segments Segment Reporting, Policy [Policy Text Block] Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] Name Outstanding Recovery, Individual Name Related tax expense Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax Award Timing, How MNPI Considered Award Timing, How MNPI Considered [Text Block] Total acquisition-related intangibles Intangible Asset, Excluding Goodwill, Indefinite-Lived 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] Held-to-maturity securities, maturing 1 to 5 years, weighted average yield Debt Securities, Held-to-Maturity, Weighted Average Yield, Maturity, after Year One Through Five Pension Adjustments Prior Service Cost Pension Adjustments Prior Service Cost [Member] Lease payments receivable, at amortized cost Lease payments receivable, at amortized cost Sales-Type and Direct Financing Leases, Payment to be Received Contribution matched by employer Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay Amounts reclassified from AOCI, net of income taxes Reclassification from AOCI, Current Period, Net of Tax, Attributable to Parent Total fair value Debt Securities, Held-to-Maturity, Unrealized Loss Position, Fair Value Debt securities, maturing within 1 year, fair value Debt Securities, Held-to-Maturity, Fair Value, Maturity, Allocated and Single Maturity Date, Year One Bank-issued trust preferred securities Bank-Issued Trust Preferred Securities [Member] Bank-Issued Trust Preferred Securities [Member] Supplemental noncash disclosures: Noncash Investing and Financing Items [Abstract] Purchases Payments to Acquire Other Investments Summary of Time Deposit Maturities Time Deposit Maturities [Table Text Block] Residential real estate Loans pledged to FHLB Residential Mortgage [Member] Deposit Liability [Table] Deposit Liability [Table] Non-Compete Agreements Noncompete Agreements [Member] Compensation Amount Outstanding Recovery Compensation Amount Individual: Individual [Axis] Weighted-average number of common shares outstanding - diluted (in shares) Total weighted-average diluted common shares outstanding (in shares) Weighted Average Number of Shares Outstanding, Diluted Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Accounts, Notes, Loans and Financing Receivable [Line Items] Accounts, Notes, Loans and Financing Receivable [Line Items] Entity Emerging Growth Company Entity Emerging Growth Company Loans and leases, net of deferred fees and costs Loans and leases, net of deferred fees and costs Loans Total Loans Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss Underlying Security Market Price Change Underlying Security Market Price Change, Percent Loans held for sale Accounts and Financing Receivables, Held-for-Sale, Not Part of Disposal Group, after Valuation Allowance Brokered Deposit [Domain] Brokered Deposit [Domain] Brokered Deposit [Domain] Derivative Financial Instruments Derivative Instruments and Hedging Activities Disclosure [Text Block] Gross Unrealized Losses Total unrealized loss Debt Securities, Held-to-Maturity, Accumulated Unrecognized Loss Imputed interest Lessee, Operating Lease, Liability, Undiscounted Excess Amount Operating Lease, Liability, Statement of Financial Position [Extensible Enumeration] Operating Lease, Liability, Statement of Financial Position [Extensible Enumeration] Short-term borrowings Short-Term Debt Travel and entertainment expense Travel and Entertainment Expense Interest rate swaps related to commercial loans Derivative Liability, Subject to Master Netting Arrangement, before Offset Revenue from Contract with Customer [Abstract] Revenue from Contract with Customer [Abstract] Loans and leases, net of deferred fees and costs, fair value Loans Receivable and Loans Held-for-sale, Fair Value Disclosure Loans Receivable and Loans Held-for-sale, Fair Value Disclosure Electronic banking income Credit and Debit Card [Member] Treasury Stock Treasury Stock Treasury Stock, Common [Member] Intangible Asset, Goodwill and Other [Abstract] Schedule of Available-for-sale Securities Debt Securities, Available-for-sale [Line Items] Debt Securities, Available-for-Sale [Line Items] Net Derivatives Liabilities on the Balance Sheet Derivative Liability, Subject to Master Netting Arrangement, after Offset Other investments Other Investment Securities Other Investment Securities Indefinite-lived Intangible Assets, Major Class Name [Domain] Intangible Asset, Indefinite-Lived, Class [Domain] Total undiscounted lease payments Lessee, Operating Lease, Liability, to be Paid Commercial and industrial Loans pledged to FRB Commercial Loan [Member] Derivative asset, notional amount Derivative Asset, Notional Amount Principal Forgiveness Principal Forgiveness [Member] Interest income: Interest Income [Abstract] Interest Income [Abstract] Originated two years before fiscal year, charge-offs Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff Collateral [Domain] Collateral Held [Domain] January 1, 2026 (in usd per share) September 30, 2026 (in usd per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value All Executive Categories All Executive Categories [Member] Employer matching percentage Defined Contribution Plan, Employer Matching Contribution, Percent of Match Deferred revenue Sales-type and Direct Financing Leases, Lease Receivable, Undiscounted Excess Amount Pension Adjustments Service Cost Pension Adjustments Service Cost [Member] Initial direct costs Sales-Type Lease, Initial Direct Cost Expense Sales-Type Lease, Initial Direct Cost Expense Accruing Loans 90+ Days Past Due Financing Receivable, Excluding Accrued Interest, 90 Days or More Past Due, Still Accruing Disbursed out of treasury stock (in shares) Stock Issued During Period, Shares, Treasury Stock Reissued Data processing and software expense Information Technology and Data Processing Summary of Calculations of Basic and Diluted Earnings per Common Share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Proceeds from principal payments, calls and prepayments Proceeds from Maturities, Prepayments and Calls of Debt Securities, Available-for-Sale Minimum Minimum [Member] Less than 12 months, fair value Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value Changes related to stock-based compensation awards: Changes Related to Stock-based Compensation Awards [Abstract] Changes Related to Stock-based Compensation Awards [Abstract] Recurring Basis Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Summary of Revenue Disaggregation of Revenue [Table Text Block] Liabilities Liabilities [Abstract] Total lease income Sales-type Lease, Lease Income Non-Rule 10b5-1 Arrangement Adopted Non-Rule 10b5-1 Arrangement Adopted [Flag] 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] Recurring Basis Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Timing of Transfer of Good or Service [Axis] Timing of Transfer of Good or Service [Axis] Accrued expenses and other liabilities Other Liabilities Proceeds from sale of FHLB stock Proceeds from Sale of Federal Home Loan Bank Stock Held-to-maturity investment securities: Debt Securities, Held-to-Maturity, Fair Value to Amortized Cost, after Allowance for Credit Loss [Abstract] Financing Receivable, Allowance for Credit Loss [Table] Financing Receivable, Allowance for Credit Loss [Table] Common stock, shares authorized (in shares) Common Stock, Shares Authorized Accumulated Other Comprehensive Income (Loss) [Line Items] Accumulated Other Comprehensive Income (Loss) [Line Items] Ongoing maintenance fees for deposit accounts Ongoing Maintenance Fees For Deposit Accounts Ongoing Maintenance Fees For Deposit Accounts Schedule of Held-to-maturity Securities [Line Items] Schedule of Held-to-Maturity Securities [Line Items] Gross gains realized Debt Securities, Available-for-Sale, Realized Gain Nonqualified deferred compensation Nonqualified deferred compensation Deferred Compensation Plan Assets Total collateral dependent loans Financing Receivable, Individually Evaluated for Credit Loss Exercise Price Award Exercise Price Reissuance of treasury stock for common share awards Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures Held-to-maturity investment securities, at amortized cost (fair value of $766,426 at September 30, 2026 and $867,714 at December 31, 2025) Held-to-maturity Debt Securities, Held-to-Maturity, Excluding Accrued Interest, after Allowance for Credit Loss Recurring Fair Value, Recurring [Member] Authorized amount Share Repurchase Program, Authorized, Amount Document Quarterly Report Document Quarterly Report 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] States and political subdivisions US States and Political Subdivisions Debt Securities [Member] Special mention Special Mention [Member] Originated three years before fiscal year, charge-offs Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff Proceeds from sales Proceeds from Sale of Debt Securities, Available-for-Sale Deposits Deposits [Member] Payments on long-term borrowings Repayments of Long-Term Debt Awards Close in Time to MNPI Disclosures, Table Awards Close in Time to MNPI Disclosures [Table Text Block] Equity Component [Domain] Equity Component [Domain] Collateral dependent loans Loans Receivable, Fair Value Disclosure Adoption Date Trading Arrangement Adoption Date Year ending December 31, 2030 Time Deposit Maturities, Year Four Servicing rights Servicing Asset Title Trading Arrangement, Individual Title Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount Accounting Policies [Abstract] Accounting Policies [Abstract] Restatement does not require Recovery Restatement Does Not Require Recovery [Text Block] Lease liabilities Total lease liabilities Operating Lease, Liability Weighted average maturity Derivative, Average Remaining Maturity Debt securities, held-to-maturity, fair value Fair Value Fair Value Debt securities, held-to-maturity, fair value Debt Securities, Held-to-Maturity, Fair Value Interest and dividends on taxable investment securities Interest Income, Securities, Operating, Taxable Other Proceeds from (Payment for) Other Financing Activity Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] Interest on short-term borrowings Interest Expense, Short-Term Borrowings Loans Receivable Loans Receivable [Member] Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Net Income [Text Block] Financial Asset, Aging [Domain] Financial Asset, Aging [Domain] Stock grant expense Restricted Stock Units (RSUs) [Member] All Adjustments to Compensation All Adjustments to Compensation [Member] Core Deposits Core Deposits Core Deposits [Member] Net cash provided by operating activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Purchase of treasury stock in connection with employee incentive program and compensation plan for Boards of Directors to be held as treasury stock Payments for repurchase of common shares in connection with employee incentive and director compensation plans to be held as treasury stock Payments for repurchase of common shares in connection with employee incentive and director compensation plans to be held as treasury stock Pledging Purpose [Domain] Pledging Purpose [Domain] Substandard Substandard [Member] Income Statement [Abstract] Income Statement [Abstract] Stockholders’ equity Equity, Attributable to Parent [Abstract] Shares issued under employee stock purchase plan (in shares) Stock Issued During Period, Shares, Employee Stock Purchase Plans Document Transition Report Document Transition Report Net investment in leases, after allowance for credit losses Sales-Type Lease, Net Investment in Lease, after Allowance for Credit Loss Increase in accruing loans 90 days or more past due Financing Receivable, Excluding Accrued Interest, 90 Days or More Past Due, Still Accruing, Period Increase (Decrease) Financing Receivable, Excluding Accrued Interest, 90 Days or More Past Due, Still Accruing, Period Increase (Decrease) Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] Fiduciary income Fiduciary Income [Member] Fiduciary Income [Member] City Area Code City Area Code Marketing expense Marketing Expense Name Forgone Recovery, Individual Name Employees Employee [Member] Employee [Member] Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Loss Loss [Member] Loss Preferred stock, shares issued (in shares) Preferred Stock, Shares Issued Total interest income Interest and Dividend Income, Operating Income Type [Domain] Income Type [Domain] [Domain] for Income Type [Axis] Debt securities, maturing over 10 years, amortized cost Debt Securities, Held-to-Maturity, Amortized Cost Excluding Accrued Interest, after Allowance for Credit Loss, Maturity, Allocated and Single Maturity Date, after Year 10 Common shares issued under employee stock purchase plan Stock Issued During Period, Value, Employee Stock Purchase Plan Total stock-based compensation expense Share-Based Payment Arrangement, Expense Debt securities, maturing 5 to 10 years, amortized cost Debt Securities, Held-to-Maturity, Amortized Cost Excluding Accrued Interest, after Allowance for Credit Loss, Maturity, Allocated and Single Maturity Date, after Year 5 through 10 12 months or more, Number of securities Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions Netting Adjustments Derivative Asset, Subject to Master Netting Arrangement, Liability Offset Measurement Basis Measurement Basis [Axis] Goodwill recorded from acquisitions Goodwill, Acquired During Period Total investment securities Investments Awarded (in usd per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Gross unrealized holding (loss) gain arising during the period OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment and Tax Debt securities, maturing within 1 year, fair value Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, Year One Subsequent Event Type [Domain] Subsequent Event Type [Domain] Forfeited (in usd per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Unrealized (Loss) Gain on Securities AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-Sale, Parent [Member] Erroneously Awarded Compensation Recovery Erroneously Awarded Compensation Recovery [Table] Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income (Loss) [Table] Year ending December 31, 2029 Time Deposit Maturities, Year Three Entity Current Reporting Status Entity Current Reporting Status Net cash (used in) provided by financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Total Shareholder Return Amount Total Shareholder Return Amount Mortgage banking income Fees and Commissions, Mortgage Banking and Servicing Liabilities: Liabilities, Fair Value Disclosure [Abstract] Other non-interest income transaction-based fees Transactional-based Fees Included In Other Non-interest Income Transactional-based Fees Included In Other Non-interest Income Thereafter Intangible Asset, Finite-Lived, Estimated Amortization Expense, After Year Four Intangible Asset, Finite-Lived, Estimated Amortization Expense, After Year Four Deposit account overdrafts Bank Overdrafts [Member] Weighted-Average Term Extension (in months) Financing Receivable, Modified, Weighted-Average Term Increase from Modification 12 months or more, unrealized loss Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss Financing activities: Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract] Bank premises and equipment, net of accumulated depreciation Property, Plant, and Equipment, after Accumulated Depreciation, Depletion, and Amortization Other interest income Other Interest and Dividend Income State income taxes paid Income Tax Paid, State and Local, after Refund Received Financial Instruments [Domain] Financial Instruments [Domain] Originated four years before fiscal year Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year Derivative assets Derivative Asset Leases Lessor, Sales-type Leases [Text Block] Intangible Asset, Finite-Lived, Class [Axis] Intangible Asset, Finite-Lived, Class [Axis] Goodwill and Other Intangible Assets Intangible Asset and Goodwill [Text Block] Underlying Securities Award Underlying Securities Amount Fair Value Estimate of Fair Value Measurement [Member] Revenue Revenue from Contract with Customer [Text Block] Derivative Asset, Statement of Financial Position [Extensible Enumeration] Derivative Asset, Statement of Financial Position [Extensible Enumeration] Other Payment for (Proceeds from) Other Investing Activity Weighted-average discount rate Operating Lease, Weighted Average Discount Rate, Percent Shares authorized under 2006 Equity Plan (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant Total Financing Receivable, Excluding Accrued Interest, Modified in Period, Amount Provision for credit losses Provision for Loan, Lease, and Other Losses Number of derivative instruments Derivative, Number of Instruments Held Time deposits exceeding FDIC limit Time Deposits, at or Above FDIC Insurance Limit Credit loss liability Off-Balance-Sheet, Credit Loss, Liability Summary of Lease Cost Lease, Cost [Table Text Block] Summary of Available-for-sale Investment Securities Schedule of Available-for-Sale Securities Reconciliation [Table Text Block] All Trading Arrangements All Trading Arrangements [Member] Less than 12 months, fair value Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months Other Performance Measure, Amount Other Performance Measure, Amount Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Related tax benefit Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, Tax Current Fiscal Year End Date Current Fiscal Year End Date Net (decrease) increase in interest-bearing deposits Net Change Interest-Bearing Deposits, Domestic Year ending December 31, 2028 Sales-Type and Direct Financing Leases, Payment to be Received, Year Two Non-PEO NEO Average Total Compensation Amount Non-PEO NEO Average Total Compensation Amount Provision for (recovery of) credit losses Provision for (Recovery of) Credit Losses Financing Receivable, Excluding Accrued Interest, Credit Loss Expense (Reversal) Derivative [Line Items] Derivative [Line Items] Less: Undistributed income allocated to unvested common shares Undistributed Earnings (Loss) Allocated To Unvested Shares Undistributed Earnings (Loss) Allocated To Unvested Shares Grant of unrestricted shares (in shares) Shares Issued, Shares, Share-Based Payment Arrangement, before Forfeiture Common shares repurchased under share repurchase program (in shares) Stock Repurchased During Period, Shares 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] Cash dividends declared per common share (in usd per share) Common Stock, Dividends, Per Share, Declared Entity File Number Entity File Number Net increase in short-term borrowings Proceeds from (Repayments of) Short-Term Debt Maximum length of time hedged Cash Flow Hedge, Interest Rate, Hedging Exposure, Maximum Period Summary of Investment Securities by Contractual Maturity Investments Classified by Contractual Maturity Date [Table Text Block] Reclassification adjustment for net gain included in net income Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Measure: Measure [Axis] Retail Certificate of Deposit [Domain] Retail Certificate of Deposit [Domain] Retail Certificate of Deposit [Domain] Unrealized gain Equity Securities, FV-NI, Unrealized Gain Treasury stock (in shares) Treasury stock, beginning of period (in shares) Treasury stock, end of period (in shares) Treasury Stock, Common, Shares Interest on tax-exempt investment securities Interest Income, Securities, Operating, Tax Exempt Summary of Other Intangible Assets Intangible Asset, Finite-Lived, Acquired [Table Text Block] Equity Components [Axis] Equity Components [Axis] Other loan expenses Foreclosed Real Estate Expense Anti-dilutive common shares excluded from calculation: Earnings Per Share, Diluted, Other Disclosure [Abstract] Entity Interactive Data Current Entity Interactive Data Current Other Investments Carrying Value [Line Items] Other Investments Carrying Value [Line Items] [Line Items] for Other Investments Carrying Value [Table] Entity Small Business Entity Small Business Total comprehensive income Comprehensive Income (Loss), Net of Tax, Attributable to Parent Sales-Type Lease, Lease Income, Statement of Income or Comprehensive Income [Extensible Enumeration] Sales-Type Lease, Lease Income, Statement of Income or Comprehensive Income [Extensible Enumeration] Weighted average amortization period Intangible Asset, Finite-Lived, Acquired, Weighted-Average Amortization Period Net interest income Interest Income (Expense), Operating MNPI Disclosure Timed for Compensation Value MNPI Disclosure Timed for Compensation Value [Flag] Net Derivative Assets on the Balance Sheet Derivative Asset, Subject to Master Netting Arrangement, after Offset Document Type Document Type Debt securities, maturing over 10 years, fair value Debt Securities, Held-to-Maturity, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 10 Interchange income Interchange Electronic Banking Income Interchange Electronic Banking Income Nonrecurring Basis Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Summary of Significant Accounting Policies Significant Accounting Policies [Text Block] Proceeds from sales of other real estate owned Proceeds from Sale of Wholly Owned Real Estate and Real Estate Acquired in Settlement of Loans Debt securities available for sale, allowance for credit loss Debt Securities, Available-for-Sale, Allowance for Credit Loss, Excluding Accrued Interest Statement of Stockholders' Equity [Abstract] Intrinsic value of awards vested Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Vested Proceeds from long-term borrowings Proceeds from Issuance of Long-Term Debt Local Phone Number Local Phone Number Held-to-maturity securities, maturing 5 to 10 years, weighted average yield Debt Securities, Held-to-Maturity, Weighted Average Yield, Maturity, after Year 5 Through 10 Pledged Status [Domain] Pledged Status [Domain] Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] 2030 Intangible Asset, Finite-Lived, Estimated Amortization Expense, Year Four Trust and investment income Fiduciary and Trust [Member] Gross intangibles Indefinite-Lived Intangible Assets, Gross (Excluding Goodwill And Acquired Intangibles) Indefinite-Lived Intangible Assets, Gross (Excluding Goodwill And Acquired Intangibles) Executive Category: Executive Category [Axis] Receivable Type [Axis] Receivable Type [Axis] Services transferred at a point in time Transferred at Point in Time [Member] Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount Supplemental cash flow information: Supplemental Cash Flow Information [Abstract] Available-for-sale securities, maturing over 10 years, weighted average yield Debt Securities, Available-for-Sale, Maturity, Rolling after 10 Years, Weighted Average Yield PEO Name PEO Name Unrealized Gain (Loss) on Cash Flow Hedges Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member] 12 months or more, fair value Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value Liabilities: Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract] Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Entity Tax Identification Number Entity Tax Identification Number Cash and balances due from banks Cash and Due from Banks Summary of Aging of The Recorded Investment In Past Due Loans and Leases Financing Receivable, Past Due [Table Text Block] Current Loans Current Financial Asset, Not Past Due [Member] Recognized tax benefit Share-Based Payment Arrangement, Expense, Tax Benefit Increase (Decrease) in Stock by Class [Roll Forward] Increase (Decrease) in Stock by Class [Roll Forward] Increase (Decrease) in Stock by Class [Roll Forward] Investment securities Debt Securities Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Consumer, direct Consumer, Direct Loan [Member] Consumer loans other than those originated by a third party. Bank owned life insurance income Bank Owned Life Insurance Income Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] 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] Measurement Frequency [Domain] Measurement Frequency [Domain] Interest expense: Interest Expense, Operating and Nonoperating [Abstract] Salaries and employee benefit costs Labor and Related Expense Total lease expense Lease, Cost Net increase in loans held for investment Payments for (Proceeds from) Loans and Leases Employee stock purchase plan expense Employee Stock [Member] Proceeds from principal payments Proceeds from Maturities, Prepayments and Calls of Held-to-Maturity Securities Earnings per common share - basic (in usd per share) Basic (in usd per share) Earnings Per Share, Basic Insider Trading Arrangements [Line Items] Short-term borrowings Short-Term Debt, Fair Value Short-term lease expense Short-Term Lease, Cost Time Deposits, Fiscal Year Maturity [Abstract] Time Deposits, Fiscal Year Maturity [Abstract] Summary of Other Investment Securities Other Investment Securities [Table Text Block] Other Investment Securities - includes securities consisting of cost-method investments, equity securities and other investments. Net effect on other comprehensive income (loss) Other Comprehensive Income (Loss), Available-for-Sale Securities Adjustment, Net of Tax, Portion Attributable to Parent Bank owned life insurance Bank owned life insurance Bank Owned Life Insurance 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] Fair Value Measurement [Domain] Fair Value Measurement [Domain] Recoveries Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Recovery Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Cover [Abstract] Originated one year before fiscal year, charge-offs Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff Equity Awards Adjustments Equity Awards Adjustments [Member] Available-for-sale securities, maturing within 1 year, weighted average yield Debt Securities, Available-for-Sale, Maturity, Rolling within One Year, Weighted Average Yield Fair Value Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Pass Pass [Member] Plan Name [Axis] Plan Name [Axis] Number of loans increasing accruing loans 90 days or more past due Financing Receivable, Excluding Accrued Interest, 90 Days or More Past Due, Still Accruing, Number of Loans Financing Receivable, Excluding Accrued Interest, 90 Days or More Past Due, Still Accruing, Number of Loans Over 3 to 6 months Time Deposit Liability, Uninsured, Maturity, over Three Months through Six Months Summary of Stock-Based Compensation Expense and Related Tax Benefit Share-Based Payment Arrangement, Cost by Plan [Table Text Block] Forfeited (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeited in Period Net loss on asset disposals and other transactions Gain (Loss) on Disposition of Assets for Financial Service Operations Summary of Gross Gains and Losses from Sales of Available-for-sale Securities Schedule of Realized Gain (Loss) [Table Text Block] Preferred stock, shares authorized (in shares) Preferred Stock, Shares Authorized Thereafter Lessee, Operating Lease, Liability, To Be Paid, After Year Four Lessee, Operating Lease, Liability, To Be Paid, After Year Four Available-for-sale securities, total weighted average yield Debt Securities, Available-for-Sale, Weighted Average Yield Commercial mortgage-backed securities Commercial mortgage-backed securities Commercial Mortgage-Backed Securities [Member] Hedging Designation [Domain] Hedging Designation [Domain] Share Repurchase Program [Axis] Share Repurchase Program [Axis] Class of Stock [Domain] Class of Stock [Domain] Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Summary of Common Stock and Treasury Stock Schedule of Stock by Class [Table Text Block] Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Nonaccrual loans, increase (decrease) Financing Receivable, Excluding Accrued Interest, Nonaccrual, Period Increase (Decrease) Financing Receivable, Excluding Accrued Interest, Nonaccrual, Period Increase (Decrease) Income Type [Axis] Income Type [Axis] Income Type [Axis] Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Investment securities, counterparties pledged Cash Pledged To Peoples From Counterparties, Investment Securities Cash Pledged To Peoples From Counterparties, Investment Securities Entity Filer Category Entity Filer Category Total fair value Debt Securities, Available-for-Sale, Unrealized Loss Position Financial Asset, Aging [Axis] Financial Asset, Aging [Axis] Available-for-sale securities, maturing 1 to 5 years, weighted average yield Debt Securities, Available-for-Sale, Maturity, Rolling after One Through Five Years, Weighted Average Yield Not Designated as Hedging Instrument Not Designated as Hedging Instrument [Member] Investments, Debt and Equity Securities [Abstract] Investments, Debt and Equity Securities [Abstract] Deposits: Deposits [Abstract] Entity Address, Address Line Two Entity Address, Address Line Two Contract Assets Contract with Customer, Asset, Allowance for Credit Loss [Roll Forward] Schedule of Stock by Class [Table] Stock, Class of Stock [Table] Value of customer relationships included in collateral dependent loans Financing Receivable, Collaterally Dependent Loans, Value Of Customer Relationships Included Financing Receivable, Collaterally Dependent Loans, Value Of Customer Relationships Included Brokered Demand Deposits Brokered Demand Deposits [Member] Brokered Demand Deposits Derivative liabilities Derivative Liability Entity Address, Address Line One Entity Address, Address Line One Noncash recognition of new leases Additions for ROU assets obtained during the year Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Released (in usd per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Income tax expense Income Tax Expense (Benefit) Unamortized discount Financing Receivable, Unamortized Purchase Premium (Discount) Derivative Liabilities Offsetting Derivative Liabilities [Abstract] Total Loans, charge-offs Charge-offs Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff Other investments Other Investments, Fair Value Other Investments, Fair Value AOCI Attributable to Parent, Net of Tax [Roll Forward] AOCI Attributable to Parent, Net of Tax [Roll Forward] Loan Restructuring Modification [Domain] Loan Restructuring Modification [Domain] Statement [Table] Statement [Table] Collateral dependent loans Collateral Dependent Loan [Member] Collateral Dependent Loan Originated one year before fiscal year Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year Summary of Nonaccrual and Past Due Loans Financing Receivable, Nonaccrual [Table Text Block] Summary of Contract Assets and Liabilities Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block] Interest rate swaps related to commercial loans Derivative Asset, Subject to Master Netting Arrangement, before Offset Loans held for sale Loan, Held-for-Sale, Fair Value Disclosure 3 months or less Time Deposit Liability, Uninsured, Maturity, Three Months or Less Number of customer relationships included in collateral dependent loans Financing Receivable, Collaterally Dependent Loans, Number Of Customer Relationships Financing Receivable, Collaterally Dependent Loans, Number Of Customer Relationships Cash flow hedges: Derivative Instruments and Hedging Activities Disclosure [Abstract]