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Asset-Backed Securities [Member] Premises and equipment, net Business Combination, Recognized Asset Acquired, Property, Plant, and Equipment For Capital Adequacy Purposes (includes applicable capital conservation buffer), Ratio Banking Regulation, Total Risk-Based Capital Ratio, Capital Adequacy, Minimum Individually Evaluated Loans Individually Evaluated Loans [Member] Individually Evaluated Loans Total individually evaluated loans Financing Receivable, Individually Evaluated for Impairment, Fair Value Financing Receivable, Individually Evaluated for Impairment, Fair Value Summary of Information Related to Operating Leases Lease, Cash Flow Information [Table Text Block] Lease, Cash Flow Information Other liabilities Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Noncurrent Liabilities, Other Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Noncurrent Liabilities, Other DEPOSITS Deposit Liabilities 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Securities available for sale, 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 Total derivatives Derivative, Fair Value, Net Orrstown Financial Services, Inc. 2025 Incentive Stock Plan 2025 Stock Incentive Plan [Member] 2025 Stock Incentive Plan Interest-bearing demand deposits Deposits, Money Market Deposits Granted (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] Class of Financing Receivable [Domain] Class of Financing Receivable [Domain] Receivables [Abstract] Receivables [Abstract] Debt securities, available-for-sale, unrealized loss position, allowance for credit loss Debt Securities, Available-for-Sale, Unrealized Loss Position, Allowance For Credit Loss Debt Securities, Available-for-Sale, Unrealized Loss Position, Allowance For Credit Loss Statement of Financial Position [Abstract] Year one Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year, Writeoff Other intangible assets, net Beginning of period Balance, end of period Total other identifiable intangible assets Intangible Asset, Finite-Lived, after Accumulated Amortization Peer Group Total Shareholder Return Amount Peer Group Total Shareholder Return Amount Number of risk participation agreements terminated Number Of Risk Participation Agreements Terminated Number Of Risk Participation Agreements Terminated FHLB advances and other borrowings Federal Home Loan Bank Borrowings, Fair Value Disclosure Level 2 Level 2 Fair Value, Inputs, Level 2 [Member] Total Shareholder Return Vs Peer Group Total Shareholder Return Vs Peer Group [Text Block] Net purchases of restricted investments in bank stocks Payments for (Proceeds from) Federal Home Loan Bank Stock Total other comprehensive (loss) income, net of tax and reclassification adjustments Total other comprehensive income (loss), net of taxes Other Comprehensive Income (Loss), Net of Tax Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] 90+ Days Past Due 90 Days or More Past Due Financial Asset, Equal to or Greater than 90 Days Past Due [Member] Actual, Amount Common Equity Tier 1 Risk Based Capital Common Equity Tier 1 Risk Based Capital Orrstown Financial Services, Inc. Parent Company [Member] Subsequent Event Type [Axis] Subsequent Event Type [Axis] Total other comprehensive loss, net of tax and reclassification adjustments on interest rate swaps used in cash flow hedges Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax Furniture and equipment Equipment Expense Schedule of Long-Term Debt Instruments [Table] Schedule of Long-Term Debt Instruments [Table] Class of Treasury Stock [Table] Class of Treasury Stock [Table] Other liabilities Business Combination, Recognized Liability Assumed, Other Liability, Current For Capital Adequacy Purposes (includes applicable capital conservation buffer), Ratio Banking Regulation, Tier 1 Risk-Based Capital Ratio, Capital Adequacy, Minimum, With Buffer Banking Regulation, Tier 1 Risk-Based Capital Ratio, Capital Adequacy, Minimum, With Buffer Municipal bonds Municipal Bonds [Member] Purchases of bank owned life insurance Payment to Acquire Life Insurance Policy, Investing Activities Banking Regulation, Regulatory Capital Requirement, Compliance [Table] Banking Regulation, Regulatory Capital Requirement, Compliance [Table] Risk participation agreements Risk Participation Agreement [Member] Risk Participation Agreement Customer relationship intangibles Customer-Related Intangible Assets [Member] Due after one year through five years Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year One Through Five Summary of Maturities of Operating Lease Liabilities Lessee, Operating Lease, Liability, to be Paid, Maturity [Table Text Block] CONTINGENCIES Contingencies Disclosure [Text Block] Supplemental disclosures of cash flow information: Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] Less: Allowance for credit losses Balance, beginning of period Balance end of period Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest Document Period End Date Document Period End Date Financial Assets Financial Assets Abstract [Abstract] Financial Assets Abstract Cash and cash equivalents Cash, Cash Equivalents, and Federal Funds Sold Orrstown Bank Subsidiaries [Member] Preferred stock, shares outstanding (in shares) Preferred Stock, Shares Outstanding Debt instrument face amount Debt Instrument, Face Amount Per share information: Earnings Per Share, Basic [Abstract] 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 Gross losses Debt Securities, Available-for-Sale, Realized Loss Treasury stock—36,412 and 204,420 shares, at cost at September 30, 2026 and December 31, 2025, respectively Treasury Stock, Common, Value Debt instrument, interest rate, effective percentage Debt Instrument, Interest Rate, Effective Percentage Fair Value Fair Value, Inputs, Level 1, Level 2, and Level 3 [Member] Fair Value Derivative, Fair Value, Net [Abstract] Minimum amount on which annual updated appraisals for classified loans is required Minimum Amount On Which Annual Updated Appraisals For Criticized Loans Is Required Minimum amount on which annual updated appraisals for criticized loans is required. Due after ten years Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year 10 Brokerage income Brokerage Commissions Revenue Securities sold under agreements to repurchase Securities Sold under Agreements to Repurchase Lessee, Lease, Description [Line Items] Lessee, Lease, Description [Line Items] Business Combination, Separately Recognized Transaction [Axis] Business Combination, Separately Recognized Transaction [Axis] Weighted-average remaining lease term (in years) Finance Lease, Weighted Average Remaining Lease Term Fair value of shares vested Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax Entity Shell Company Entity Shell Company Total Class of Financing Receivable Financing Receivable, Excluding Accrued Interest, Modified in Period, to Total Financing Receivables, Percentage EARNINGS PER SHARE Earnings Per Share [Text Block] Commercial real estate, construction and land development loans Commercial Real Estate Construction And Land Development Loans [Member] Commercial Real Estate Construction And Land Development Loans [Member] Per share information: Earnings Per Share [Abstract] Document Fiscal Period Focus Document Fiscal Period Focus Peer Group Issuers, Footnote Peer Group Issuers, Footnote [Text Block] Total liabilities Liabilities Trading Symbol Trading Symbol Weighted Average Interest Rate Reduction Financing Receivable, Modified, Weighted-Average Interest Rate Decrease from Modification Discount Rate Measurement Input, Discount Rate [Member] Securities available-for-sale (amortized cost of $985,444 and $972,138 at September 30, 2026 and December 31, 2025, respectively) Fair Value Investment securities Debt Securities, Available-for-Sale, Excluding Accrued Interest Purchases of bank premises and equipment Payments to Acquire Property, Plant, and Equipment Summary of Fair Value of Acquired PCD Loans Schedule Of Fair Value Of Acquired PCD Loans [Table Text Block] Schedule Of Fair Value Of Acquired PCD Loans Total identifiable net assets Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Consideration Transferred Financing Receivable, Allowance for Credit Losses [Line Items] Financing Receivable, Allowance for Credit Loss [Line Items] Proceeds from FHLB advances with original maturities greater than 90 days Proceeds from FHLBank Borrowings, Financing Activities Net (premium amortization) discount accretion Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Discount Accretion (Premium Amortization), Amount Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Discount Accretion (Premium Amortization), Amount Schedule of Estimated Fair Values of Assets Acquired and Liabilities Assumed Business Combination, Recognized Asset Acquired and Liability Assumed [Table Text Block] Company Selected Measure Name Company Selected Measure Name Unrealized gains (losses) included in OCI Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss) Purchases of AFS securities Payments to Acquire Debt Securities, Available-for-Sale Deposits Interest Expense, Deposits Fixed rate of interest Long-Term Debt, Percentage Bearing Fixed Interest, Percentage Rate Financial Instrument Performance Status [Axis] Financial Instrument Performance Status [Axis] Year one Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year Depreciation and amortization expense Depreciation, Depletion and Amortization, Nonproduction Cash flows from operating activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract] Dividends paid per share (in usd 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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] Accrued interest receivable Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Accrued Interest Receivable Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Accrued Interest Receivable Summary of Level 3 Fair Value Measurement Activity Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] Financing receivable, modified, commitment to lend Financing Receivable, Modified, Commitment to Lend Other, net Increase (Decrease) in Other Operating Assets and Liabilities, Net Cash paid for operating lease liabilities Operating Lease, Payments Award Timing Predetermined Award Timing Predetermined [Flag] New risk participation agreements Number Of New Risk Participation 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Interest rate cash flow hedge gain (loss) to be reclassified during next 12 months, net Interest Rate Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months, Net Goodwill Business Combination, Recognized Asset Acquired to Liability Assumed, Excess (Less), and Goodwill Fair Value Disclosures [Abstract] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] INVESTMENT SECURITIES Investment in Debt and Equity Securities and Other Trading Assets [Text Block] Expiration Date Trading Arrangement Expiration Date Hedging Relationship [Axis] Hedging Relationship [Axis] Cash and due from banks Cash and Cash Equivalents, Fair Value Disclosure Subordinated notes Subordinated Debt Subordinated Debt [Member] Summary of ROU Assets and Related Lease Liabilities Lessee, Lease Assets And Liabilities [Table Text Block] Lessee, Lease Assets And Liabilities Exercisable at end of period (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, 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with Credit Deterioration Financial Asset, Other than Financial Asset Acquired with Credit Deterioration [Member] Business Combination [Table] Business Combination [Table] PEO Actually Paid Compensation Amount PEO Actually Paid Compensation Amount Business Combination, Asset Acquisition, Transaction between Entities under Common Control, and Joint Venture Formation [Abstract] Weighted-average discount rate Finance Lease, Weighted Average Discount Rate, Percent Debt instrument interest rate Debt Instrument, Interest Rate, Stated Percentage Total shareholders’ equity Beginning balance Ending balance Equity, Attributable to Parent Other assets Business Combination, Recognized Asset Acquired, Other Asset, Noncurrent For Capital Adequacy Purposes (includes applicable capital conservation buffer), Amount Banking Regulation, Total Risk-Based Capital, Capital Adequacy, Minimum Assets Assets [Abstract] Payment Delay Payment Deferral [Member] PCD ACL Financing Receivable, Purchased with Credit Deterioration, Allowance for Credit Loss at Acquisition Date Shares issued for common stock (in shares) Expected shares to be issued for common stock - shares as exchanged (in shares) Business Combination, Consideration Transferred, Equity Interest, Share Issued, Number of Shares Summary of Amortized Cost of the Loan Portfolio, by Year of Origination, Loan Class, and Credit Quality Financing Receivable Credit Quality Indicators [Table Text Block] Fair Value, Measurements, Nonrecurring Fair Value, Nonrecurring [Member] Professional services Professional Fees Insider Trading Policies and Procedures [Line Items] Nonperforming Nonperforming Financial Instruments [Member] Adjustments to acquired goodwill Goodwill Adjustments to acquired goodwill Goodwill, Measurement Period Adjustment Business Combination, Separately Recognized Transaction [Domain] Business Combination, Separately Recognized Transaction [Domain] Thereafter Lessee, Operating Lease, Liability, to be Paid, after Year Four 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Total Compensation for Covered Year [Member] Payment of legal settlement Payments for Legal Settlements Interchange income Merchant and Bankcard Fees, Interchange Income Merchant and Bankcard Fees, Interchange Income CMOs and MBSs Available For Sale Securities Collateralized Mortgage Obligations And Mortgage Backed Securities, Fair Value Available For Sale Securities Collateralized Mortgage Obligations And Mortgage Backed Securities, Fair Value Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Derivatives designated as hedging instruments: Designated as hedging instrument Designated as Hedging Instrument [Member] Unpaid Principal Balance Financing Receivable, Purchased with Credit Deterioration, Amount at Purchase Price For Capital Adequacy Purposes (includes applicable capital conservation buffer), Ratio Common Equity Tier 1 Risk Based Capital Required For Capital Adequacy To Risk Weighted Assets Common Equity Tier 1 Risk Based Capital Required For Capital Adequacy To Risk Weighted Assets Financing Receivable, Modified [Table] Financing Receivable, Modified [Table] Acquisition and development Acquisition and Development Acquisition And Development Portfolio Segment [Member] Acquisition And Development Portfolio Segment [Member] Debt instrument basis spread Debt Instrument, Basis Spread on Variable Rate Shares Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding [Roll Forward] Interest-bearing Interest-Bearing Deposit Liabilities, Domestic Nonaccrual loans with no related ACL Financing Receivable, Excluding Accrued Interest, Nonaccrual, No Allowance Restricted Stock Restricted Stock [Member] Accumulated Other Comprehensive Loss AOCI Attributable to Parent [Member] To Be Well Capitalized Under Prompt Corrective Action Regulations, Ratio Banking Regulation, Total Risk-Based Capital Ratio, Well Capitalized, Minimum All Individuals All Individuals [Member] Carrying Amounts of Hedged Assets Hedged Asset, Fair Value Hedge Dividends paid Payments of Dividends Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Performing Performing Financial Instruments [Member] Investment securities pledged to secure public funds, fair value Debt Securities, Available-for-Sale, Restricted Unrecognized compensation expense, recognition period Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition Commercial, industrial and other loans Commercial Industrial And Other Loans [Member] Commercial Industrial And Other Loans [Member] Statement [Line Items] Statement [Line Items] Total assets Assets Term Extension Extended Maturity [Member] Total interest expense Interest Expense, Operating To Be Well Capitalized Under Prompt Corrective Action Regulations, Amount Common Equity Tier 1 Risk Based Capital 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Combination, Recognized Liability Assumed, Liability SHARE-BASED COMPENSATION PLANS Share-Based Payment Arrangement [Text Block] Occupancy Occupancy, Net PEO PEO [Member] For Capital Adequacy Purposes (includes applicable capital conservation buffer), Amount Common Equity Tier 1 Risk Based Capital Required For Capital Adequacy Common Equity Tier 1 Risk Based Capital Required For Capital Adequacy Brokered money market deposits Deposits, Brokered Money Market Deposits Deposits, Brokered Money Market Deposits Non-owner occupied residential Non-owner occupied residential Non Owner Occupied Residential [Member] Non Owner Occupied Residential [Member] Goodwill Goodwill Balance, beginning of year Balance, end of period Goodwill Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Violation of Home Country Law, Amount Individually evaluated loans Individually Evaluated Loans, Fair Value Individually Evaluated Loans, Fair Value Total Debt Securities, Available-for-Sale, Unrealized Loss Position, Number of Positions Retained Earnings Retained Earnings [Member] Interest rate swaps - commercial loans Interest Rate Swaps Commercial Loans [Member] Interest Rate Swaps Commercial Loans Increase (Decrease) in Shareholders' Equity Increase (Decrease) in Stockholders' Equity [Roll Forward] Common stock, shares outstanding (in shares) Common Stock, Shares, Outstanding Award Timing Disclosures [Line Items] Summary of Carrying Amounts and Estimated Fair Values of Financial Instruments Fair Value, by Balance Sheet Grouping [Table Text Block] Financing Receivable, Recorded Investment, Past Due [Line Items] Financing Receivable, Past Due [Line Items] Diluted earnings per share (in usd per share) Earnings Per Share, Diluted Internal Credit Assessment [Axis] Internal Credit Assessment [Axis] FDIC insurance Federal Deposit Insurance Corporation Premium Expense Provision for credit losses - loans Provision for credit losses - loans Provision for 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Total identifiable assets acquired Business Combination, Recognized Asset Acquired, Asset Share-Based Payment Arrangement [Abstract] Accrued interest payable Interest Payable Fair Value Interest payable fair value. 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Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] Gross Amount Intangible Asset, Finite-Lived, before Accumulated Amortization Forgone Recovery due to Expense of Enforcement, Amount Forgone Recovery due to Expense of Enforcement, Amount 1-4 family residential construction loans One To Four Family Residential Construction Loans [Member] One To Four Family Residential Construction Loans [Member] Deferred income tax asset, net Business Combination, Recognized Asset Acquired, Deferred Tax Asset Collateralized Mortgage Obligations Collateralized Mortgage Obligations [Member] Loan Restructuring Modification [Axis] Loan Restructuring Modification [Axis] Total Fair Value Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Fair Value Goodwill [Roll Forward] Goodwill [Roll Forward] Intangible Asset, Finite-Lived, Class [Domain] Intangible Asset, Finite-Lived, Class [Domain] 2034 Trust Preferred Junior Subordinated Debt Maturing 2034 [Member] Trust Preferred Junior Subordinated Debt Maturing 2034 Employee Stock Ownership Plan (ESOP) Disclosures [Line Items] Employee Stock Ownership Plan (ESOP) Disclosures [Line Items] Award Type [Domain] Award Type [Domain] 2026 Lessee, Operating Lease, Liability, to be Paid, Remainder of Fiscal Year FAIR VALUE Fair Value Disclosures [Text Block] Level 3 Level 3 Fair Value, Inputs, Level 3 [Member] U.S. Government Agencies U.S. Government Agencies US Government Agencies Debt Securities [Member] 2027 Intangible Asset, Finite-Lived, Estimated Amortization Expense, Year One Consumer Consumer Borrower [Member] Net treasury stock, shares issued (in shares) Treasury stock, shares acquired (in shares) Treasury Stock, Shares, Acquired Lease terms Lessee, Operating Lease, Term of Contract Share price (in usd per share) Orrstown Common Stock price per common share - closing stock price as of June 28, 2024 (in usd per share) Share Price Home Equity Line of Credit Home equity lines of credit Home Equity Line of Credit [Member] Other assets Other Assets 30-59 Days Past Due 30-59 Days Past Due Financial Asset, 30 to 59 Days Past Due [Member] Substandard - IEL Substandard IEL [Member] Substandard IEL Substandard - Non-IEL Substandard Non IEL [Member] Substandard Non IEL Legal Entity [Axis] Legal Entity [Axis] Actual, Amount Banking Regulation, Total Capital, Actual Lessee, Lease, Description [Table] Lessee, Lease, Description [Table] Noninterest income Noninterest Income [Abstract] Number of legal proceedings that might have a material effect on the results of operations Number Of Legal Proceedings That Have Material Effect Number of legal proceedings that have material effect. 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 Customer list Customer Lists [Member] Intangible Asset, Finite-Lived [Table] Intangible Asset, Finite-Lived [Table] Number of borrowers experiencing financial difficulty that were given contract modifications Number Of Borrowers Experiencing Financial Difficulty, Given Loan Modifications Number Of Borrowers Experiencing Financial Difficulty, Given Loan Modifications Non-NEOs Non-NEOs [Member] Automated teller and interchange fees Automated Teller and Interchange Fees Automated Teller and Interchange Fees Number of matured swap agreement Number of Matured Swap Agreements Number of Matured Swap Agreements 2028 Intangible Asset, Finite-Lived, Estimated Amortization Expense, Year Two Cash dividends Dividends, Cash Allowance for Credit Losses on Loans and AFS Securities Credit Loss, Financial Instrument [Policy Text Block] LEASES Lessee, Operating Leases [Text Block] Due after five years through ten years Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year 5 Through 10 Long-term Debt, Type [Domain] Long-Term Debt, Type [Domain] Equity, Class of Treasury Stock [Line Items] Equity, Class of Treasury Stock [Line Items] Cash collateral held from counterparties Cash Collateral Received From Counterparty for Derivatives Cash Collateral Received From Counterparty for Derivatives Derivative instrument, number of derivatives terminated Derivative Instrument, Number Of Derivatives Terminated Derivative Instrument, Number Of Derivatives Terminated Acquisition of treasury stock Payments for Repurchase of Common Stock Range [Axis] Statistical Measurement [Axis] Summary of Effect of Derivative Financial Instruments on OCI and Net Income Derivative Instruments, Gain (Loss) [Table Text Block] Award Type [Axis] Award Type [Axis] Unrealized losses on interest rate swaps used in cash flow hedges Amount of Net Loss Recognized in OCI on Derivative Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification and Tax Interest rate products Interest Rate Contract [Member] Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Unearned income Financing Receivable Excluding Accrued Interest, Deferred Income Financing Receivable Excluding Accrued Interest, Deferred Income Retained earnings Retained Earnings (Accumulated Deficit) Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Common Stock Common Stock [Member] Fair Value, off-Balance-Sheet Risk [Table] Fair Value, off-Balance-Sheet Risk [Table] Tier 1 risk-based capital: Banking Regulation, Tier 1 Risk-Based Capital [Abstract] Year five Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff Proceeds from disposal of premises and equipment Proceeds from Sale of Other Productive Assets Derivative Contract [Domain] Derivative Contract [Domain] Risk participation agreements with purchase protection Number Of Risk Participation Agreements With Purchase Protection Number Of Risk Participation Agreements With Purchase Protection Non-Accrual Financing Receivable, Excluding Accrued Interest, Modified in Period, Nonaccrual, Amount Financing Receivable, Excluding Accrued Interest, Modified in Period, Nonaccrual, Amount Fair Value Adjustment Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustments [Abstract] Total Past Due Financial Asset, Past Due [Member] Total liabilities and shareholders’ equity Liabilities and Equity Purchases Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases Employee Stock Option Stock Option Share-Based Payment Arrangement, Option [Member] Other service charges, commissions and fees NonInterest Income, Fess And Commissions Other Non Interest Income, Fess And Commissions Other Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Asset Class [Axis] Asset Class [Axis] Fair value adjustments on loans held for sale Loans Held For Sale, Fair Value Adjustment Loans Held For Sale, Fair Value Adjustment Restructuring expenses Restructuring Charges Tabular List, Table Tabular List [Table Text Block] Additional paid - in capital Additional Paid in Capital 2029 Intangible Asset, Finite-Lived, Estimated Amortization Expense, Year Three 2026 Intangible Asset, Finite-Lived, Estimated Amortization Expense, Remainder of Fiscal Year 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] Long-Lived Asset, Class [Domain] Long-Lived Asset, Class [Domain] Financing Receivable Portfolio Segment [Axis] Financing Receivable Portfolio Segment [Axis] Preferred stock, $1.25 par value per share; 500,000 shares authorized; no shares issued or outstanding Preferred Stock, Value, Issued Adjustment to Compensation: Adjustment to Compensation [Axis] Purchased options – rate cap Purchased Option- Rate Cap [Member] Purchased Option- Rate Cap Operating lease assets acquired Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Operating Lease, Right-of-Use Asset Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Operating Lease, Right-of-Use Asset Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Interest Interest Paid, Excluding Capitalized Interest, Operating Activity Hedging Designation [Axis] Hedging Designation [Axis] 60-89 Days Past Due 60-89 Days Past Due Financial Asset, 60 to 89 Days Past Due [Member] Totals Assets, Fair Value Disclosure Investment in limited partnerships Payments to Acquire Limited Partnership Interests Name Measure Name Pay vs Performance Disclosure [Line Items] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Off-balance sheet instruments Fair Value Disclosure, off-Balance-Sheet Risks, Amount, Liability Less Than 12 Months Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions Debt Instrument [Line Items] Debt Instrument [Line Items] 2030 Subordinated Debt Maturing 2030 [Member] Subordinated Debt Maturing 2030 Loans Interest and Fee Income, Financing Receivable Additional Paid-In Capital Additional Paid-in Capital [Member] Equipment Equipment [Member] Summary of Contractual or Notional Amounts, Commitments to Fund Schedule of Fair Value, off-Balance-Sheet Risks [Table Text Block] Total Collateral Total Collateral [Member] Total Collateral Impairment Goodwill, Impairment Loss Accrued interest receivable Interest Receivable Name Trading Arrangement, Individual Name Unrecognized compensation expense Share-Based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount Subordinated notes and trust preferred debt Interest Expense, Subordinated Notes and Debentures Operating lease expense Operating Lease, Expense Investment securities gains Net Investment securities gains Debt and Equity Securities, Gain (Loss) Company Selected Measure Amount Company Selected Measure Amount Options exercisable, weighted average remaining contractual life (in years) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Term Accounts and Financing Receivables [Table] Accounts and Financing Receivables [Table] Weighted-average remaining lease term (in years) Operating Lease, Weighted Average Remaining Lease Term Commitments to fund Fair Value Disclosure, off-Balance-Sheet Risks, Face Amount, Liability Common stock reserved to be issued under dividend reinvestment and stock purchase plan (in shares) Common Stock Shares Reserved For Issuance Under Purchase Plan Common stock shares reserved for issuance under purchase plan. Non-PEO NEO Non-PEO NEO [Member] Tier 1 leverage capital: Banking Regulation, Tier 1 Leverage Capital [Abstract] Noninterest-bearing Noninterest-bearing demand deposits Noninterest-Bearing Deposit Liabilities, Domestic Asset-backed Available For Sale Securities, Asset-backed Debt Securities, Amortized Cost Available For Sale Securities, Asset-backed Debt Securities, Amortized Cost Total noninterest expenses Noninterest Expense Securities sold under agreements to repurchase Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities, Securities Sold Under Agreements To Repurchase Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Liabilities, Securities Sold Under Agreements To Repurchase Award Timing Method Award Timing Method [Text Block] Net 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 Forecast Forecast [Member] Measurement Input, Pull Through Measurement Input, Pull Through [Member] Measurement Input, Pull Through Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] First lien First lien First Lien [Member] First Lien [Member] Derivative liabilities Derivative Liability, Notional Amount Net income Net income Net income Net income Net Income (Loss) Attributable to Parent Long-term Debt, Type [Axis] Long-Term Debt, Type [Axis] Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Location, Statement of Financial Position, Balance [Axis] Location, Statement of Financial Position, Balance [Axis] Financing Receivable, Past Due [Table] Financing Receivable, Past Due [Table] Restatement Determination Date: Restatement Determination Date [Axis] Exercisable at period end (in usd per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Exercise Price Codorus Valley Unsecured Subordinated Notes Codorus Valley Unsecured Subordinated Notes [Member] Codorus Valley Unsecured Subordinated Notes Recoveries Financing Receivable, Allowance for Credit Loss, Recovery Interest rate swaps - FHLB advances and brokered money market deposits Interest Rate Swap FHLB And Other [Member] Interest Rate Swap FHLB And Other Owner occupied Owner occupied Owner Occupied [Member] Owner Occupied [Member] Adjustment to premises and equipment Premises and equipment, net Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Property, Plant, and Equipment Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block] Amount of loan on which reviews require approval Amount Of Loan On Which Reviews Require Approval Amount Of Loan On Which Reviews Require Approval Tax effect OCI, Debt Securities, Available-for-Sale, Gain (Loss), after Adjustment, Tax Range [Domain] Statistical Measurement [Domain] Document Fiscal Year Focus Document Fiscal Year Focus Merger-related expenses Business Combination, Acquisition-Related Cost, Expense Shares Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Total deposits Deposits Codorus Valley Merger Codorus Valley Bancorp, Inc [Member] Codorus Valley Bancorp, Inc Common stock, no par value—$0.05205 stated value per share; 50,000,000 shares authorized; 19,706,971 shares issued and 19,670,559 outstanding at September 30, 2026; 19,711,628 shares issued and 19,507,208 outstanding at December 31, 2025 Common Stock, Value, Issued 2027 Lessee, Operating Lease, Liability, to be Paid, Year One Shares repurchased as treasury stock for employee taxes associated with restricted stock vesting Payment, Tax Withholding, Share-Based Payment Arrangement Summary of Maturities of Subordinated Notes and Trust Preferred Debt Schedule of Long-Term Debt Instruments [Table Text Block] Accrued interest receivable Interest Receivable Fair Value Interest receivable fair value. Restatement Determination Date Restatement Determination Date Other operating expenses Other Noninterest Expense Fully vested and expected to vest (in usd per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price Amendment Flag Amendment Flag Cash paid for finance lease liabilities Finance Lease, Principal Payments Number of share-based compensation plans Number Of Share Based Compensation Plans Number Of Share Based Compensation Plans (Gross Unrealized Losses) Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax Letters of credit Standby Letters of Credit [Member] Summary of Amortized Cost and Fair Values of AFS Securities Debt Securities, Available-for-Sale [Table Text Block] Interest rate swaps - FHLB advances and brokered deposits Federal Home Loan Bank Advances [Member] Percentage of loan-to-value ratios of the value of the real estate taken as collateral Percentage Of Loan To Value Ratio Of Value Of Real Estate Taken As Collateral Percentage of loan to value ratio of value of real estate taken as collateral. Deferred income tax expense Increase (Decrease) in Deferred Income Taxes Adjustment to Non-PEO NEO Compensation Footnote Adjustment to Non-PEO NEO Compensation Footnote [Text Block] Transfers into level 3 Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3 To Be Well Capitalized Under Prompt Corrective Action Regulations, Amount Banking Regulation, Tier 1 Risk-Based Capital, Well Capitalized, Minimum Entity Address, State or Province Entity Address, State or Province Total nonaccrual loans Financing Receivable, Excluding Accrued Interest, Nonaccrual PEO Total Compensation Amount PEO Total Compensation Amount Weighted average shares outstanding - basic (in shares) Weighted Average Number of Shares Outstanding, Basic Share Repurchase Program [Domain] Share Repurchase Program [Domain] Derivative, notional amount Derivative, Notional Amount Fair Value, by Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping [Table] 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Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Land Land [Member] Employee Stock Purchase Plan Employee Stock Purchase Plan [Member] Employee Stock Purchase Plan [Member] Gain on disposal of premises and equipment Gain (Loss) on Disposition of Property Plant Equipment Short-term investments Interest Income, Short-term Investments, Operating Interest Income, Short-term Investments, Operating Subordinated notes payable outstanding Maturities of subordinated notes and trust preferred debt Long-Term Debt Combination Term Extension and Principal Forgiveness Extended Maturity and Principal Forgiveness [Member] Other Other Other Security Investments [Member] Year three Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year Impairment (reversal) charges Mortgage Servicing Rights (MSR) Impairment (Recovery) Net cash used in investing activities Cash Provided by (Used in) Investing Activity, Including 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Block] Schedule Of Amortized Cost Basis Of Collateral-Dependent Loans Directors' compensation Director Fee Financing lease assets Finance Lease, Right-of-Use Asset, after Accumulated Amortization Statement of Comprehensive Income [Abstract] Fractional shares of common stock to be paid in cash (in shares) Business Combination, Fractional Shares Of Common Stock To Be Paid In Cash Business Combination, Fractional Shares Of Common Stock To Be Paid In Cash Name Outstanding Recovery, Individual Name Award Timing, How MNPI Considered Award Timing, How MNPI Considered [Text Block] Cash collateral held by counterparty for derivatives Cash Collateral Held By Counterparty for Derivatives Cash Collateral Held By Counterparty for Derivatives 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] Operating lease liabilities acquired Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Operating Lease, Liabilities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Operating Lease, Liabilities Pension Adjustments Prior Service Cost Pension Adjustments Prior Service Cost [Member] Real estate acquired through foreclosure, sold Real Estate Acquired Through Foreclosure, Sold Real Estate Acquired Through Foreclosure, Sold Accelerated amortization of unearned discounts Amortization of Debt Issuance Costs and Discounts Total other comprehensive (loss) income, net of tax and reclassification adjustments on securities available for sale OCI, Debt Securities, Available-for-Sale, Gain (Loss), after Adjustment and Tax Adjustments to deposits Deposits Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Deposits Business Combination, Provisional Information, Initial 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participation agreements with sold protection Number Of Risk Participation Agreements With Sold Protection Number Of Risk Participation Agreements With Sold Protection DERIVATIVE FINANCIAL INSTRUMENTS Derivative Instruments and Hedging Activities Disclosure [Text Block] Other assets Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Other Noncurrent Assets Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Other Noncurrent Assets Cash surrender value of life insurance Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Assets, Cash Surrender Value Of Insurance Policies Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Assets, Cash Surrender Value Of Insurance Policies Less: imputed interest Lessee, Operating Lease, Liability, Undiscounted Excess Amount Derivative liabilities Derivative Liability, Subject to Master Netting Arrangement, before Offset Recovery of credit losses - unfunded loan commitments Recovery of credit losses - unfunded loan commitments Off-balance sheet credit exposure (recovery) Off-Balance-Sheet, Credit Loss, Liability, Credit Loss Expense (Reversal) Tax benefit realized from stock options exercised Share-Based Payment Arrangement, Exercise of Option, Tax Benefit Treasury Stock Treasury Stock, Common [Member] Intangible Asset, Goodwill and Other [Abstract] Debt Securities, Available-for-sale [Line Items] Debt Securities, Available-for-Sale [Line Items] Interest rate swaps - commercial loans Commercial Loan [Member] Total Lessee, Operating Lease, Liability, to be Paid Derivative asset Derivative Asset, Notional Amount Proceeds from sales of loans originated for sale Proceeds from Sale, Loan, Held-for-Sale Principal Forgiveness Principal Forgiveness [Member] Year three Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff For 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