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of Vesting Date of Prior Year Equity Awards Vested in Covered Year [Member] Revenue from contract with customer Revenue from Contract with Customer, Including Assessed Tax Over 12 months Time Deposit Liability, above US Insurance Limit, Maturity, over 12 Months Total acquisition-related intangibles Indefinite-Lived Intangible Assets (Excluding Goodwill) Total non-interest income Noninterest Income Recognition of income previously deferred Contract With Customer, Liability, Revenue Recognized, Including Opening Balance Contract With Customer, Liability, Revenue Recognized, Including Opening Balance Gross Unrealized Losses Total unrealized loss Debt Securities, Held-to-Maturity, Accumulated Unrecognized Loss Loans and Leases Loans, Notes, Trade and Other Receivables Disclosure [Text Block] Summary of Revenue Disaggregation of Revenue [Table Text Block] Cash and balances due from banks Cash and Due from Banks Accruing Loans 90+ Days Past Due Financing Receivable, Excluding Accrued 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Nonvested, Number Federal Home Loan Bank ("FHLB") stock Investment in Federal Home Loan Bank Stock, Fair Value Disclosure Net cash provided by operating activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Cancellation of restricted common shares (in shares) Stock Issued During Period, Shares, Restricted Stock Award, Forfeited Summary of Sales Type Leases Sales-type and Direct Financing Leases, net investments [Table Text Block] Sales-type and Direct Financing Leases, net investments Proceeds from sales Proceeds from Sale of Debt Securities, Available-for-Sale Available-for-sale investment securities, at fair value (amortized cost of $$1,107,248 at March 31, 2026 and $$1,076,980 at December 31, 2025) Fair Value Debt securities Debt Securities, Available-for-Sale, Excluding Accrued Interest Subsequent Event Subsequent Event [Member] Net interest income Interest Income (Expense), Operating Equity Valuation Assumption Difference, Footnote Equity Valuation Assumption Difference, Footnote [Text Block] PEO Total Compensation Amount PEO Total Compensation Amount Interest rate swaps related to commercial loans Derivative Liability, Subject to Master Netting Arrangement, before Offset Remaining nine months of 2026 Finite-Lived Intangible Asset, Expected Amortization, Remainder of Fiscal Year Equity Components [Axis] Equity Components [Axis] Originated three years before fiscal year Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year Non-Rule 10b5-1 Arrangement Adopted Non-Rule 10b5-1 Arrangement Adopted [Flag] Related tax expense Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax Number of reportable segments Number of Reportable Segments Commercial real estate, other Commercial real estate, other Commercial real estate, other Commercial Real Estate [Member] Proceeds from sales of other real estate owned Proceeds from Sale of Wholly Owned Real Estate and Real Estate Acquired in Settlement of Loans Reissuance of treasury stock for deferred compensation plan for Boards of Directors Stock Issued During Period, Value, Treasury Stock Reissued Entity Address, State or Province Entity Address, State or Province Substandard Substandard [Member] Total interest income Interest and Dividend Income, Operating Special mention Special Mention [Member] Financial Asset, Aging [Domain] Financial Asset, Aging [Domain] Servicing rights Servicing Asset Collateral dependent loans Loans Receivable, Fair Value Disclosure Income Type [Domain] Income Type [Domain] [Domain] for Income Type [Axis] Individual: Individual [Axis] Matching contributions Defined Contribution Plan, Cost Cash dividends paid Payments of Ordinary Dividends, Common Stock Additional deferred income Contract with Customer, Liability, Additions Contract with Customer, Liability, Additions Deposit Liability [Table] Deposit Liability [Table] Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Payments on long-term borrowings Repayments of Long-Term Debt Leases Lessor, Sales-type Leases [Text Block] Entity Interactive Data Current Entity Interactive Data Current Weighted-Average Grant Date Fair Value Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract] Financing Receivable, Troubled Debt Restructuring [Line Items] Financing Receivable, Modified [Line Items] Home equity lines of credit Home Equity Line of Credit [Member] Total non-interest expense Noninterest Expense 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 Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Payment Deferral Payment Deferral [Member] Interest on deposits Interest Expense, Deposits 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 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 Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Summary of Loans by Risk Category Financing Receivable Credit Quality Indicators [Table Text Block] Outstanding Aggregate Erroneous Compensation Amount Outstanding Aggregate Erroneous Compensation Amount Non-interest-bearing Non-interest-bearing deposits Noninterest-Bearing Deposit Liabilities Exercise Price Award Exercise Price Entity Filer Category Entity Filer Category Class of Stock Class of Stock [Domain] Common stock, no par value (in usd per share) Common Stock, No Par Value Federal and state income tax rate Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent Subsequent Event Type [Axis] Subsequent Event Type [Axis] Net (decrease) increase in interest-bearing deposits Net Change Interest-Bearing Deposits, Domestic 2029 Finite-Lived Intangible Asset, Expected Amortization, Year Three Net investment in leases Financing Receivable, before Allowance for Credit Loss Vesting [Domain] Vesting [Domain] Gross intangibles Finite-Lived Intangible Assets, Gross Commission and fees from sale of insurance policies Commission And Fees From Sale Of Insurance Policies Commission And Fees From Sale Of Insurance Policies 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] Interchange income Interchange Electronic Banking Income Interchange Electronic Banking Income Total dividends declared (in usd per share) Common Stock, Dividends, Per Share, Declared, Aggregate Dividends Common Stock, Dividends, Per Share, Declared, Aggregate Dividends Entity Address, Address Line One Entity Address, Address Line One Entity Address, Address Line Two Entity Address, Address Line Two Accumulated Other Comprehensive Loss Accumulated Other Comprehensive (Loss) Income AOCI Attributable to Parent [Member] Internal Credit Assessment [Axis] Internal Credit Assessment [Axis] Internal Credit Assessment [Domain] Internal Credit Assessment [Domain] Investment Securities Securities Investment [Member] Derivative Financial Instruments Derivative Instruments and Hedging Activities Disclosure [Text Block] Summary of Common Stock and Treasury Stock Schedule of Stock by Class [Table Text Block] Fair Value as of Grant Date Award Grant Date Fair Value Related tax benefit Other 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Award, Cost Not yet Recognized, Amount Document Quarterly Report Document Quarterly Report Less than 12 months, fair value Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months Deposit account overdrafts Bank Overdrafts [Member] Deposits Deposit Liabilities Disclosures [Text Block] Bank owned life insurance income Bank Owned Life Insurance Income Long-term borrowings Long-Term Debt, Fair Value Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] 12 months or more, unrealized loss Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss Summary of Sales Type Lease Maturity Sales-Type and Direct Financing Leases, Payment to be Received, Maturity [Table Text Block] Summary of Nonaccrual and Past Due Loans Financing Receivable, Nonaccrual [Table Text Block] Summary of Loans by Classification Schedule of Financing Receivables, Type [Table Text Block] Schedule of Financing Receivables, Type [Table Text Block] Year ending December 31, 2028 Lessee, Operating Lease, Liability, to be Paid, Year Two Estimated residual values Residual Value of Leased Asset U.S. government sponsored agencies US Government-sponsored Enterprises Debt Securities [Member] Other investments: Investments, All Other Investments [Abstract] Less: Dividends paid on unvested common shares Dividends Paid On Unvested Shares Dividends Paid On Unvested Shares Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] Total investment securities Investments Title Trading Arrangement, Individual Title Peer Group Total Shareholder Return Amount Peer Group Total Shareholder Return Amount 3 months or less Time Deposit Liability, Uninsured, Maturity, Three Months or Less Non-PEO NEO Non-PEO NEO [Member] Common shares issued under employee stock purchase plan Stock Issued During Period, Value, Employee Stock Purchase Plan Accumulated Other Comprehensive Income (Loss) [Line Items] Accumulated Other Comprehensive Income (Loss) [Line Items] Derivative liability, notional amount Derivative Liability, Notional Amount Gross Unrealized Gains Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax Award Type Award Type [Domain] Year ending December 31, 2027 Lessee, Operating Lease, Liability, to be Paid, Year One 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 Investment securities, counterparties pledged Cash Pledged To Peoples From Counterparties, Investment Securities Cash Pledged To Peoples From Counterparties, Investment Securities Equity Awards Adjustments Equity Awards Adjustments [Member] Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block] Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Compensation Amount Outstanding Recovery Compensation Amount Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Fair Value Estimate of Fair Value Measurement [Member] MNPI Disclosure Timed for Compensation Value MNPI Disclosure Timed for Compensation Value [Flag] Reclassification adjustment for net loss included in net income Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, before Tax Employee stock purchase plan expense Employee Stock [Member] Deposit account service charges Deposit Account [Member] Year ending December 31, 2030 Time Deposit Maturities, Year Four Less than $100 Time Deposits, Less than $100,000 12 months or more, Number of securities 12 months or more, number of securities Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions Summary of Pledged Securities Schedule of Financial Instruments Owned and Pledged as Collateral [Table Text Block] Accumulated other comprehensive loss, net of deferred income taxes Accumulated Other Comprehensive Income (Loss), Net of Tax Financial Instruments [Domain] Financial Instruments [Domain] Debt securities, maturing over 10 years, fair value Debt Securities, Held-to-Maturity, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 10 Summary of Gains or Losses Recorded in AOCI Schedule of Cash Flow Hedges Included in Accumulated Other Comprehensive Income (Loss) [Table Text Block] Aggregate Pension Adjustments Service Cost Aggregate Pension Adjustments Service Cost [Member] Pledging Purpose [Domain] Pledging Purpose [Domain] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Year ending December 31, 2030 Sales-Type and Direct Financing Leases, Payment to be Received, Year Four Minimum Minimum [Member] Net interest income after provision for credit losses Interest Income (Expense), after Provision for Loan Loss Accounts, Notes, Loans and Financing Receivable [Line Items] Accounts, Notes, Loans and Financing Receivable [Line Items] Company Selected Measure Name Company Selected Measure Name Fair Value Measurement [Domain] Fair Value Measurement [Domain] Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Operating lease payments Operating Lease, Payments Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] Net earnings allocated to common shareholders Net Income (Loss) Available to Common Stockholders, Diluted Collateral [Domain] Collateral Held [Domain] Goodwill [Roll Forward] Goodwill [Roll Forward] 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 Operating Segments Segment Reporting, Policy [Policy Text Block] Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Commercial loan swap fees Transaction Fee [Member] Fee charged to customer for a requested specified transaction Derivative [Table] Derivative [Table] Entity Small Business Entity Small Business Income Type [Axis] Income Type [Axis] Income Type [Axis] Weighted average maturity Derivative, Average Remaining Maturity Preferred stock, shares outstanding (in shares) Preferred Stock, Shares Outstanding Document Transition Report Document Transition Report Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] Held-to-maturity securities, maturing within 1 year, weighted average yield Debt Securities, Held-to-Maturity, Weighted Average Yield, Maturity, Year One Underlying Securities Award Underlying Securities Amount $100 or more Time Deposits, $100,000 or More Gross gains realized Debt Securities, Available-for-Sale, Realized Gain Equity Component [Domain] Equity Component [Domain] Document Period End Date Document Period End Date 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] Awards Close in Time to MNPI Disclosures, Table Awards Close in Time to MNPI Disclosures [Table Text Block] Short-term lease expense Short-Term Lease, Cost Less: Undistributed income allocated to unvested common shares Undistributed Earnings (Loss) Allocated To Unvested Shares Undistributed Earnings (Loss) Allocated To Unvested Shares Document Type Document Type Level 3 Fair Value, Inputs, Level 3 [Member] Earnings Per Common Share Earnings Per Share [Text Block] Name Outstanding Recovery, Individual Name Product and Service [Axis] Product and Service [Axis] Non-employee director stock-based compensation expense Non-employee Directors [Member] Non-employee Directors [Member] Variable lease expense Variable Lease, Cost Revenue Revenue from Contract with Customer, Excluding Assessed Tax Deferred revenue Sales-type and Direct Financing Leases, Lease Receivable, Undiscounted Excess Amount Statistical Measurement [Axis] Statistical Measurement [Axis] Authorized amount Share Repurchase Program, Authorized, Amount Originated one year before fiscal year, charge-offs Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Brokerage Income Brokerage Income [Member] Brokerage Income [Member] 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 Peer Group Issuers, Footnote Peer Group Issuers, Footnote [Text Block] 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 Mortgage banking income Fees and Commissions, Mortgage Banking and Servicing Non-interest income: Noninterest Income, Other [Abstract] Share Repurchase Program [Domain] Share Repurchase Program [Domain] Total other comprehensive income, net of tax Other comprehensive income, net of tax Other comprehensive income (loss), net of reclassifications and tax Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Carol A. Schneeberger [Member] Carol A. Schneeberger Non-interest expense: Other Expenses [Abstract] Total loans modified Financing Receivable, Excluding Accrued Interest, Modified, after 12 Months Level 1 Fair Value, Inputs, Level 1 [Member] Earnings per common share - diluted (in usd per share) Diluted (in usd per share) Earnings Per Share, Diluted Federal Deposit Insurance Corporation ("FDIC") insurance expense Federal Deposit Insurance Corporation Premium Expense Summary of Gross Gains and Losses from Sales of Available-for-sale Securities Schedule of Realized Gain (Loss) [Table Text Block] AOCI Attributable to Parent, Net of Tax [Roll Forward] AOCI Attributable to Parent, Net of Tax [Roll Forward] Total Financing Receivable, Excluding Accrued Interest, Modified in Period, Amount Commercial and industrial Loans pledged to FRB Commercial Loan [Member] Treasury stock (in shares) Treasury stock, beginning of period (in shares) Treasury stock, end of period (in shares) Treasury Stock, Common, Shares Common shares issued under dividend reinvestment plan Stock Issued During Period, Value, Dividend Reinvestment Plan State income taxes paid Income Tax Paid, State and Local, after Refund Received Derivative Liability, Statement of Financial Position [Extensible Enumeration] Derivative Liability, Statement of Financial Position [Extensible Enumeration] Investments, Debt and Equity Securities [Abstract] Investments, Debt and Equity Securities [Abstract] Core Deposits Core Deposits [Member] Term Extension Extended Maturity [Member] Imputed interest Lessee, Operating Lease, Liability, Undiscounted Excess Amount 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 Year ending December 31, 2027 Time Deposit Maturities, Year One 2028 Finite-Lived Intangible Asset, Expected Amortization, Year Two Total undiscounted lease payments Lessee, Operating Lease, Liability, to be Paid Other Investments Carrying Value [Line Items] Other Investments Carrying Value [Line Items] [Line Items] for Other Investments Carrying Value [Table] 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 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 Indefinite-Lived Trade Names Trade Names [Member] Summary of Available-for-sale Securities with Unrealized Loss Debt Securities, Available-for-Sale, Unrealized Loss Position, Fair Value [Table Text Block] Expiration Date Trading Arrangement Expiration Date 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 Total lease 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Transferred, Equity Interests Issued and Issuable, Cash Paid Per Acquiree Share Title of 12(b) Security Title of 12(b) Security Lessee, Lease, Description [Table] Lessee, Lease, Description [Table] Provision for (recovery of) credit losses Provision for (Recovery of) Credit Losses Financing Receivable, Excluding Accrued Interest, Credit Loss Expense (Reversal) Earnings Per Share [Abstract] Non-Compete Agreements Noncompete Agreements [Member] Collateral dependent loans Collateral Dependent Loan [Member] Collateral Dependent Loan Unrealized loss Equity Securities, FV-NI, Unrealized Loss Originated two years before fiscal year, charge-offs 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] Citizens and Citizens Bank Merger Citizens And Citizens Bank Merger [Member] Citizens And Citizens Bank Merger Available-for-sale securities, total weighted average yield Debt Securities, Available-for-Sale, Weighted Average Yield Purchase of treasury stock (in shares) Treasury Stock, Shares, Acquired Financing Receivable, Allowance for Credit Loss [Line Items] Financing Receivable, Allowance for Credit Loss [Line Items] Recurring Basis Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Award Timing Disclosures [Line Items] Other Investments Carrying Value [Table] Other Investments Carrying Value [Table] Other Investments Carrying Value [Table] Measurement Frequency [Domain] Measurement Frequency [Domain] Stockholders' Equity Equity [Text Block] Loan Restructuring Modification [Domain] Loan Restructuring Modification [Domain] Net loans and leases Financing Receivable, Excluding Accrued Interest, after Allowance for Credit Loss Net income Net income Net income available to common shareholders Net Income (Loss) Attributable to Parent Subsequent Event [Table] Subsequent Event [Table] Timing of Transfer of Good or Service [Axis] Timing of Transfer of Good or Service [Axis] Vesting period Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period Preferred stock, shares authorized (in shares) Preferred Stock, Shares Authorized Purchase of treasury stock under share repurchase program Payments for Repurchase of Common Stock Adoption Date Trading Arrangement Adoption Date Balance, January 1, 2026 Balance, March 31, 2026 Contract with Customer, Asset, after Allowance for Credit Loss Operating lease term Lessee, Operating Lease, Term of Contract Customer Relationships Customer Relationships [Member] Income before income taxes Operating Income (Loss) Retained earnings Retained Earnings (Accumulated Deficit) Money market deposit accounts Deposits, Money Market Deposits Summary of Stock-Based Compensation Expense and Related Tax Benefit Share-Based Payment Arrangement, Cost by Plan [Table Text Block] 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] Services transferred over time Transferred over Time [Member] Total other investments at cost Other Investments, At Cost Other Investments, At Cost Purchases Payments to Acquire Held-to-Maturity Securities Class of Stock Class of Stock [Axis] Less than 12 months, Number of securities Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions Unrealized Gain (Loss) on Cash Flow Hedges Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member] Subsequent Event Type [Domain] Subsequent Event Type [Domain] 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] Statement [Table] Statement [Table] Financing activities: Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract] Held-to-maturity securities, total weighted average yield Debt Securities, Held-to-Maturity, Weighted Average Yield Total shareholder return performance period Share-Based Compensation Arrangement by Share-Based Payment Award, Total Shareholder Return Performance, Period Share-Based Compensation Arrangement by Share-Based Payment Award, Total Shareholder Return Performance, Period 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] Balance, January 1, 2026 Balance, March 31, 2026 Contract with Customer, Liability Net loss on asset disposals and other transactions Gain (Loss) on Disposition of Assets for Financial Service Operations All Adjustments to Compensation All Adjustments to Compensation [Member] Amendment Flag Amendment Flag Recognized tax benefit Share-Based Payment Arrangement, Expense, Tax Benefit Summary of Other Intangible Assets Schedule of Acquired Finite-Lived Intangible Assets by Major Class [Table Text Block] Thereafter Sales-Type And Direct Financing Leases, Lease Receivable, To Be Received, After Year Four Sales-Type And Direct Financing Leases, Lease Receivable, To Be Received, After Year Four Treasury stock, at cost, $1,017,603 shares at March 31, 2026 and $1,215,120 shares at December 31, 2025 Treasury Stock, Common, Value Year ending December 31, 2027 Sales-Type and Direct Financing Leases, Payment to be Received, Year One Maximum length of time hedged Maximum Length of Time Hedged in Interest Rate Cash Flow Hedge Termination Date Trading Arrangement Termination Date Interest-bearing deposits in other banks Interest-Bearing Deposits in Banks and Other Financial Institutions Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] Year ending December 31, 2029 Time Deposit Maturities, Year Three Allowance for credit losses Allowance for credit losses Beginning balance Ending balance Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest 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 Interest income: Interest Income [Abstract] Interest Income [Abstract] Receivable [Domain] Receivable Receivable [Domain] Weighted-average discount rate Operating Lease, Weighted Average Discount Rate, Percent Summary of Assets Measured on a Recurring Basis Fair Value, Assets Measured on Recurring Basis [Table Text Block] Weighted-average number of common shares outstanding - basic (in shares) Weighted-average common shares outstanding (in shares) Weighted Average Number of Shares Outstanding, Basic Summary of Calculations of Basic and Diluted Earnings per Common Share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Subsequent Events [Abstract] Operating lease expense Operating Lease, Expense Derivative Liabilities Offsetting Derivative Liabilities [Abstract] Net loss realized Debt Securities, Available-for-Sale, Realized Gain (Loss) Cash dividends declared Dividends, Cash Gross unrealized holding (loss) gain arising during the period 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 Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] Leases Lessor, Direct Financing Leases [Text Block] Brokered Demand Deposits Brokered Demand Deposits [Member] Brokered Demand Deposits Common stock portion, number of shares received for each share converted (in shares) Business Combination, Consideration Transferred, Equity Interests Issued and Issuable, Entity Shares Issued Per Acquiree Share Business Combination, Consideration Transferred, Equity Interests Issued and Issuable, Entity Shares Issued Per Acquiree Share Net occupancy and equipment expense Occupancy, Net Netting Adjustments Derivative Asset, Subject to Master Netting Arrangement, Liability Offset Subsequent Events Subsequent Events [Text Block] Insider Trading Arrangements [Line Items] Prior Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year Total employee stock-based compensation expense Employees [Member] For the benefit of Peoples' employees Current Loans Current Financial Asset, Not Past Due [Member] Debt securities available for sale, allowance for credit loss Debt Securities, Available-for-Sale, Allowance for Credit Loss, Excluding Accrued Interest Total liabilities Liabilities Percentage of Total by Loan Category Financing Receivable, Excluding Accrued Interest, Modified in Period, to Total Financing Receivables, Percentage Pension Adjustments Prior Service Cost Pension Adjustments Prior Service Cost [Member] Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Employee stock purchase plan discount Employee Stock Purchase Plan Discount Employee Stock Purchase Plan Discount Net increase in loans held for investment Payments for (Proceeds from) Loans and Leases Savings accounts Deposits, Savings Deposits Proceeds from principal payments Proceeds from Maturities, Prepayments and Calls of Held-to-Maturity Securities Held-to-maturity investment securities, at amortized cost (fair value of $$820,850 at March 31, 2026 and $$867,714 at December 31, 2025) Held-to-maturity Debt Securities, Held-to-Maturity, Excluding Accrued Interest, after Allowance for Credit Loss Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Non-NEOs Non-NEOs [Member]