Trading Arrangements, by Individual Trading Arrangements, by Individual [Table] Trading Arrangement: Trading Arrangement [Axis] Maximum Maximum [Member] Subordinated debt Subordinated Debt Loans held-for-sale Financing Receivable, Held-for-Sale Portion at fair value measurement Portion at Fair Value Measurement [Member] Schedule of contractual maturity of mortgage-backed securities Mortgage Backed Securities [Table Text Block] Mortgage Backed Securities Short-term Debt, Type [Axis] Short-Term Debt, Type [Axis] Title of 12(b) Security Title of 12(b) Security Carrying amount Reported Value Measurement [Member] Net income available to common shareholders - two class method -Diluted Net Income (Loss) Available to Common Stockholders, Diluted Debt Securities, Available-for-sale [Table] Debt Securities, Available-for-Sale [Table] Derivative Instruments, Gain (Loss) [Table] Derivative Instruments, Gain (Loss) [Table] Schedule of fair value measurement for nonrecurring assets Fair Value Measurements, Nonrecurring [Table Text Block] Adjustment to Compensation, Amount Adjustment to Compensation Amount Financial Instrument [Axis] Financial Instrument [Axis] Segment Reporting [Abstract] Segment Reporting [Abstract] Number of investment positions with unrealized losses Number Of Investment Positions With Unrealized Losses Disclosure regarding factors used to determine that the impairment of securities which include securities held-to-maturity, trading securities and securities available-for-sale where cost exceeds fair value is not an other than temporary impairment (OTTI). This item contains disclosure of the number of investment positions in the marketable investments determined to be temporarily impaired. Pension and Other Post-Retirement Benefits Retirement Benefits [Text Block] Maximum potential amount of future payments Guarantor Obligations, Maximum Exposure, Undiscounted Derivative Instrument [Axis] Derivative Instrument [Axis] Other comprehensive income (loss) before reclassification adjustment, tax Other Comprehensive Income (Loss) before Reclassifications, Tax Investment securities available-for-sale Business Combination, Recognized Asset Acquired, Investment in Debt and Equity Securities, Current Measurement Frequency [Axis] Measurement Frequency [Axis] Less than 12 months - Unrealized loss Held To Maturity And Available For Sale Securities Continuous Unrealized Loss Position Less Than 12 Months Aggregate Losses This item represents the excess of amortized cost basis over fair value of securities that have been in a loss position for less than twelve months. Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Banking Segment Banking Segment [Member] Banking Segment Purchase price Financing Receivable, Purchased with Credit Deterioration, Amount at Par Value Premises and equipment Business Combination, Recognized Asset Acquired, Property, Plant, and Equipment Principal balance at acquisition Total loans receivable Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Fee, and Loan in Process Schedule of the portfolio of investment securities held-to-maturity 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 Cash paid during the period for: Cash Paid During Period for [Abstract] Mortgage banking income Mortgage Banking Income The noninterest income derived from mortgage banking activities (fees and commissions), including fees earned from servicing third-party assets. Earnings Per Share, Treasury Stock Method Earnings Per Share, Treasury Stock Method [Member] Prior Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Other intangible assets, net Intangible Asset, Excluding Goodwill, after Accumulated Amortization Schedule of troubled debt restructurings (including re-modified TDRs) by portfolio segment and by class of financing receivable Financing Receivable, Modified [Table Text Block] Retirement Benefits [Abstract] Retirement Benefits [Abstract] Net amortization on marketable securities Accretion (Amortization) of Discounts and Premiums, Investments Outstanding Aggregate Erroneous Compensation Amount Outstanding Aggregate Erroneous Compensation Amount Number of reportable segments Number of Reportable Segments Short-term Debt, Type [Domain] Short-Term Debt, Type [Domain] Comprehensive income: Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract] Marketable securities available-for-sale, amortized cost Total marketable securities available-for-sale Debt Securities, Available-for-Sale, Amortized Cost, Excluding Accrued Interest, before Allowance for Credit Loss Collateralized borrowings, due within one year Securities Sold under Agreements to Repurchase [Member] Entity Address, City or Town Entity Address, City or Town Money market deposit accounts Deposits, Money Market Deposits FHLB stock, at cost Federal Home Loan Bank Stock Class of Financing Receivable [Domain] Class of Financing Receivable [Domain] Receivables [Abstract] Receivables [Abstract] Commercial real estate loans - owner occupied Commercial Real Estate, Owner Occupied [Member] Commercial Real Estate, Owner Occupied [Member] Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Year one, charge-offs Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year, Writeoff Intangible asset - net Intangible Asset, Finite-Lived, after Accumulated Amortization Peer Group Total Shareholder Return Amount Peer Group Total Shareholder Return Amount Federal Home Loan Bank Branch [Axis] Federal Home Loan Bank Branch [Axis] 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 proceeds of FHLB stock Payments for (Proceeds from) Federal Home Loan Bank Stock Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] 90 days or greater delinquent Financial Asset, Equal to or Greater than 90 Days Past Due [Member] Loans individually assessed Impaired Loans [Member] Represents information pertaining to impaired loans. Loans held for investment Financing Receivable, Excluding Accrued Interest, Before Allowance For Credit Loss And Loans Held For Sale Financing Receivable, Excluding Accrued Interest, Before Allowance For Credit Loss And Loans Held For Sale FHLMC Federal Home Loan Mortgage Corporation Certificates and Obligations (FHLMC) [Member] Total mortgage-backed securities Debt Securities, Held-to-Maturity, Maturity, Allocated and Single Maturity Date, Fair Value FHLB stock dividends Dividend Income, Operating Schedule of Long-term Debt Instruments [Table] Schedule of Long-Term Debt Instruments [Table] Interest rate lock commitments: Fair Value Measurement with Unobservable Inputs Reconciliation Recurring Basis Assets Interest Rate Lock Commitments Realized and Unrealized [Abstract] Fair Value Measurement with Unobservable Inputs Reconciliation Recurring Basis Assets Interest Rate Lock Commitments Realized and Unrealized Schedule of segment information and reconciliation Segment Reporting [Table Text Block] Savings deposits Deposits, Savings Deposits Other comprehensive (loss)/income Other comprehensive income (loss), net of tax Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Guarantor Obligations [Line Items] Guarantor Obligations [Line Items] 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 Non-cash activities: Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] Allowance for credit losses Allowance for credit losses Beginning balance Ending balance Allowance for credit losses Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest Document Period End Date Document Period End Date Debt issued Debt Instrument, Face Amount Mortgage banking activity Gain (Loss) on Sale of Properties Revolving loans converted to term loans Financing Receivable, Excluding Accrued Interest, Revolving, Converted to Term Loan Issued July 26, 2023 Interest Rate Swap, Issued July 26, 2023 Contract Four [Member] Interest Rate Swap, Issued July 26, 2023 Contract Four Average rate (as a percent) Debt Instrument, Interest Rate, Effective Percentage Unrealized holding (gains) losses, tax OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment, Tax Due after ten years Due after ten years Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year 10 Other comprehensive income (loss), net of tax Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent Stock-based compensation expense Shares Issued, Value, Share-Based Payment Arrangement, before Forfeiture Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax Entity Shell Company Entity Shell Company Total class of financing receivable (as a percent) Financing Receivable, Excluding Accrued Interest, Modified in Period, to Total Financing Receivables, Percentage Earnings Per Share Earnings Per Share [Text Block] Commercial and industrial loans Commercial And Industrial [Member] Commercial And Industrial Earnings Per Share [Abstract] 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 Marketable securities available-for-sale (amortized cost of $1,972,165 and $1,710,978, respectively) Total marketable securities available-for-sale Debt Securities, Available-for-Sale, Excluding Accrued Interest Purchases of premises and equipment, net Payments to Acquire Property, Plant, and Equipment Schedule of interest rate products designated as hedging instruments Schedule of Interest Rate Derivatives [Table Text Block] Allowance for loan losses Financing Receivable, Allowance for Credit Loss [Line Items] Schedule of recognized identified assets acquired and liabilities assumed Business Combination, Recognized Asset Acquired and Liability Assumed [Table Text Block] Company Selected Measure Name Company Selected Measure Name Purchase of marketable securities available-for-sale Payments to Acquire Debt Securities, Available-for-Sale PCD loans Financing Receivable, Purchased with Credit Deterioration, Amount at Purchase Price [Abstract] Deposits Interest Expense, Deposits Due after one year through five years Debt Securities, Held-to-Maturity, Fair Value, Maturity, Allocated and Single Maturity Date, after Year One Through Five Due after ten years Debt Securities, Available-for-sale, After Ten Years, Gross Unrealized Loss Represents the gross unrealized losses for securities, at a point in time, which are categorized neither as held-to-maturity nor trading securities and which are expected to mature after ten years from the balance sheet date. Debt Securities, Held-to-maturity, Credit Quality Indicator [Table] Debt Securities, Held-to-Maturity, Credit Quality Indicator [Table] Schedule of derivative instruments Derivatives Not Designated as Hedging Instruments [Table Text Block] Year one Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year Credit Facility [Domain] Credit Facility [Domain] Amount outstanding after repurchase Debt Instrument, Amount Outstanding After Repurchase Debt Instrument, Amount Outstanding After Repurchase Dividends paid, per share (in dollars per share) Common Stock, Dividends, Per Share, Cash Paid Equity Valuation Assumption Difference, Footnote Equity Valuation Assumption Difference, Footnote [Text Block] Total identifiable net assets Business Combination, Recognized Asset Acquired to Liability Assumed, Excess (Less) Transfers into Level 3 Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3 Advances by borrowers for taxes and insurance Advance Payments by Borrowers for Taxes and Insurance Trust Preferred Investments Trust Preferred Investments Trust Preferred Securities Subject to Mandatory Redemption [Member] Troubled debt restructurings Financing Receivable, Modified [Line Items] Appraisal value Valuation Technique, Consensus Pricing Model [Member] Value of options forfeited Share-Based Compensation Arrangement By Share-Based Payment Award, Options, Forfeitures In Period, Value Share-Based Compensation Arrangement By Share-Based Payment Award, Options, Forfeitures In Period, Value Add: Shares adjustment (in shares) Weighted Average Number of Shares Outstanding, Diluted, Adjustment Schedule of changes in Level 3 assets and liabilities measured at fair value on a recurring basis Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] Award Timing Predetermined Award Timing Predetermined [Flag] Interest income: Interest and Dividend Income, Operating [Abstract] Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] Level 1 Level 1 Fair Value, Inputs, Level 1 [Member] (Gain)/loss on sale of investments Gain (Loss) on Sale of Investments Derivative asset before netting Derivative Asset, Gross Asset Including Not Subject to Master Netting Arrangement Class of Financing Receivable [Axis] Class of Financing Receivable [Axis] Less than 12 months - Fair value Held To Maturity And Available For Sale Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value This item represents the aggregate fair value of investments in debt and equity securities categorized as held-to-maturity and available-for-sale securities that have been in a continuous unrealized loss position for less than twelve months. Mortgage-backed securities Residential Mortgage-Backed Securities [Member] Net gain, net of tax of $0, $0, ($125), and $0, respectively Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, after Tax Preferred stock, par value (in dollars per share) Preferred Stock, Par or Stated Value Per Share Depreciation Depreciation Total mortgage-backed securities Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Amortized Cost Federal Home Loan Bank Branch [Domain] Federal Home Loan Bank Branch [Domain] Mortgage-backed securities Collateralized Securities [Member] Due within one year Due within one year Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, Year One Estimated (decrease)/increase to interest expense in the next twelve months Interest Rate Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months, Net Fair Value Disclosures [Abstract] Fair Value Disclosures [Abstract] Marketable Securities Investment in Debt and Equity Securities and Other Trading Assets [Text Block] Expiration Date Trading Arrangement Expiration Date Gross unrealized holding gains Debt Securities, Held-to-Maturity, Accumulated Unrecognized Gain Cash and cash equivalents Cash and Cash Equivalents, Fair Value Disclosure Subordinated debt Subordinated Debt [Member] Aggregate Pension Adjustments Service Cost Aggregate Pension Adjustments Service Cost [Member] Derivative [Table] Derivative [Table] Time deposits Deposits, Fair Value Disclosure Commercial real estate loans Commercial Real Estate [Member] Net income available to common shareholders Business Combination, Pro Forma Information, Pro Forma Income (Loss), after Tax Derivative assets Derivative Asset [Abstract] Segments [Domain] Segments [Domain] Entity shares issued per acquiree share (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 Interest rate swap agreements Interest Rate Swap [Member] Due within one year Debt Securities, Available-for-sale, One Year or Less, Gross Unrealized Loss Debt Securities, Available-for-sale, One Year or Less, Gross Unrealized Loss Number of offices acquired Business Combination, Number Of Offices Acquired Business Combination, Number Of Offices Acquired Borrowings Debt Disclosure [Text Block] Interest on deposits and borrowings, interest credited to deposit accounts Cash Paid for Interest on Deposits This element represents interest paid to depositors on deposit accounts held by the institution. Debt issuance costs Debt Issuance Costs, Net Business Combination [Table] Business Combination [Table] Nonaccrual loans Nonaccrual loans at beginning balance Nonaccrual loans at ending balance Financing Receivable, Nonaccrual, Including Nonaccrual With No Allowance Financing Receivable, Nonaccrual, Including Nonaccrual With No Allowance 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] Fair value Debt Securities, Available-for-Sale, Fair Value, Fiscal Year Maturity [Abstract] Consumer loans Consumer Loan [Member] Stated rate (as a percent) 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 Interest deferral Debt Instrument, Interest Payment Deferred Represents the amount of interest payment deferred on the subordinated debentures of the entity. Assets Assets [Abstract] Quoted prices for similar loans in active markets adjusted by an expected pull-through rate Valuation Technique, Quoted Pricing [Member] Valuation Technique, Quoted Pricing Payment delay Payment Deferral [Member] Initial allowance for credit losses at acquisition Financing Receivable, Purchased with Credit Deterioration, Allowance for Credit Loss at Acquisition Date Number of shares to be issued as part of consideration Business Combination, Consideration Transferred, Equity Interest, Share Issued, Number of Shares Schedule of credit quality indicators Financing Receivable Credit Quality Indicators [Table Text Block] Nonrecurring Fair Value, Nonrecurring [Member] Professional services Professional Fees Insider Trading Policies and Procedures [Line Items] Goodwill acquired Goodwill, Measurement Period Adjustment Special mention and substandard Special Mention And Substandard [Member] Represents information pertaining to special mention or substandard financing receivables. Deferred income tax expense Deferred Income Tax Expense (Benefit) Financing Receivable Portfolio Segment [Domain] Financing Receivable Portfolio Segment [Domain] Number of operating segments Number of Operating Segments Anti-dilutive awards (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Schedule of the changes in carrying amount of goodwill Goodwill [Table 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 Additional paid-in capital Additional Paid in Capital, Common Stock Earnings Per Share, Diluted, Method [Domain] Earnings Per Share, Diluted, Method [Domain] Guarantor Obligation [Table] Guarantor Obligation [Table] 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] Legal Proceedings Legal Matters and Contingencies [Text Block] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Hedging Interest rate swaps designated as hedging instruments Designated as Hedging Instrument [Member] Principal balance at acquisition Financing Receivable, Purchased with Credit Deterioration, Amount at Purchase Price Maximum exposure collateralized Guarantee Obligations Maximum Exposure Collateralized Represents the maximum potential amount of future payments which is fully collateralized. Financing Receivable, Modified [Table] Financing Receivable, Modified [Table] Interest rate Basis spread on variable rate (as a percent) Debt Instrument, Basis Spread on Variable Rate Nonaccrual loans with no allowance Financing Receivable, Excluding Accrued Interest, Nonaccrual, No Allowance Origination of loans held-for-sale Payment for Origination and Purchase, Loan, Held-for-Sale Accumulated other comprehensive income/(loss) Total AOCI Attributable to Parent [Member] All Individuals All Individuals [Member] Increase in advances by borrowers for taxes and insurance Increase (Decrease) in Advance Payments by Borrowers for Taxes and Insurance Cash dividends paid on common stock Payments of Dividends Reconciliation of all assets and liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3) Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Borrowed funds Securities Loaned Value of stock issued for purchase Northwest Bancshares, Inc. common stock issued Business Combination, Consideration Transferred, Equity Interest Statement [Line Items] Statement [Line Items] Total assets Segment assets Assets Defined Benefit Plan [Table] Defined Benefit Plan [Table] Term extension Extended Maturity [Member] Total interest expense Interest expense Interest Expense, Operating Internal Credit Assessment [Domain] Internal Credit Assessment [Domain] Total marketable securities available-for-sale Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax Other comprehensive (loss)/income before reclassification adjustments OCI, before Reclassifications, Net of Tax, Attributable to Parent Premises and occupancy costs Occupancy, Net PEO PEO [Member] Maximum period for which interest payment on the subordinated debentures can be deferred (in years) Debt Instrument, Interest Deferral Option Maximum Period Represents the maximum period for which interest payment on the subordinated debentures can be deferred. Total - Unrealized loss Held To Maturity And Available For Sale Securities Continuous Unrealized Loss Position Aggregate Losses This item represents the excess of amortized cost basis over fair value of securities in a loss position and which are categorized as held-to-maturity and available-for-sale securities. Goodwill Goodwill Retirement Plan Type [Axis] Retirement Plan Type [Axis] Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Violation of Home Country Law, Amount Financing Receivable, Modified, Subsequent Default [Line Items] Financing Receivable, Modified, Subsequent Default [Line Items] Retained earnings Retained Earnings [Member] Revolving Credit Facility Revolving Credit Facility [Member] Increase (Decrease) in Stockholders' Equity Increase (Decrease) in Stockholders' Equity [Roll Forward] Common stock, shares outstanding (in shares) Beginning balance (in shares) Ending balance (in shares) Common Stock, Shares, Outstanding Award Timing Disclosures [Line Items] Schedule of the carrying amount and estimated fair value of the entity's financial instruments included in the consolidated statement of financial condition Fair Value, by Balance Sheet Grouping [Table Text Block] Loan payment delinquencies Financing Receivable, Past Due [Line Items] Corporate debt issues Corporate Corporate Debt Securities [Member] Diluted earnings per share (in dollars per share) Earnings Per Share, Diluted Internal Credit Assessment [Axis] Internal Credit Assessment [Axis] Federal deposit insurance premiums Federal Deposit Insurance Corporation Premium Expense Provision for credit losses - loans Financing Receivable, Credit Loss, Expense (Reversal) Merger, asset disposition and restructuring expense Merger, Asset Disposition, And Restructuring Expense Merger, Asset Disposition, And Restructuring Expense Amortization of intangible assets Amortization expense Amortization Intangible Asset, Finite-Lived, Amortization Expense Intangible assets subject to amortization Intangible Asset, Finite-Lived [Line Items] Credit Rating [Axis] Credit Rating [Axis] Credit Rating [Axis] Year four Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year Schedule of Offsetting assets Offsetting Assets [Table Text Block] Outstanding balance Financing Receivable, Commitments, Outstanding Financing Receivable, Commitments, Outstanding Amounts reclassified from accumulated other comprehensive income Reclassification from AOCI, Current Period, Tax Financial assets: Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] Reclassification adjustments for prior period service costs and actuarial gains included in net income, net of tax of $50, $64, $101, and $128, respectively Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, after Tax Common shares returned Stock Repurchased During Period, Value Issued May 12, 2023 Interest Rate Swap, Issued May 12, 2023 Contract One [Member] Interest Rate Swap, Issued May 12, 2023 Contract One [Member] Equity Awards Adjustments, Footnote Equity Awards Adjustments, Footnote [Text Block] Proceeds from loan maturities and principal reductions Proceeds From Maturities And Principal Reductions On Loans Proceeds From Maturities And Principal Reductions On Loans Provision/(benefit) for credit losses - unfunded commitments Provision for Other Credit Losses Operating activities: Cash Provided by (Used in) Operating Activity, Continuing Operation [Abstract] Real estate owned, net Other Real Estate Mortgage-backed securities Interest Income, Securities, Mortgage-Backed Loans Insured or Guaranteed by Government Authorities [Domain] Loans Insured or Guaranteed by Government Authorities [Domain] Acquisition Business Combination [Text Block] Due after one year through five years Debt Securities, Held-to-Maturity, After One Through Five Years, Gross Unrealized Gain Debt Securities, Held-to-Maturity, After One Through Five Years, Gross Unrealized Gain Earnings Per Share, Diluted, by Common Class, Including Two-Class Method [Table] Earnings Per Share, Diluted, by Common Class, Including Two-Class Method [Table] Rule 10b5-1 Arrangement Adopted Rule 10b5-1 Arrangement Adopted [Flag] Service cost Defined Benefit Plan, Service Cost Loans 90 days past due and accruing Financing Receivable, Recorded Investment, 90 Days Or More Past Maturity And Still Accruing Financing Receivable, Recorded Investment, 90 Days Or More Past Maturity And Still Accruing Revolving loans Financing Receivable, Excluding Accrued Interest, Revolving Schedule of the changes in the allowance for losses on loans receivable Financing Receivable, Allowance for Credit Loss [Table Text Block] Common stock, shares issued (in shares) Common Stock, Shares, Issued Beginning balance Ending balance Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value Forward commitments Forward Contracts [Member] Earnings Per Share, Diluted, Method [Axis] Earnings Per Share, Diluted, Method [Axis] Earnings Per Share, Diluted, Method Changes in Accumulated Other Comprehensive Income Comprehensive Income (Loss) Note [Text Block] Off-Balance Sheet Exposure Off-Balance Sheet Exposure [Member] Off-Balance Sheet Exposure [Member] Gain on real estate owned, net Gains (Losses) on Sales of Other Real Estate Acquisitions Finite-Lived Intangible Assets, Acquisition (Disposition) Finite-Lived Intangible Assets, Acquisition (Disposition) Noninterest expense: Noninterest Expense [Abstract] Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Increase/(decrease) in other operating income Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net Borrowed funds Debt, Short-Term And Long-Term Debt, Short-Term And Long-Term Termination Date Trading Arrangement Termination Date Fair Value, Recurring and Nonrecurring [Table] Fair Value, Recurring and Nonrecurring [Table] Core deposit intangible Business Combination, Recognized Asset Acquired, Identifiable Intangible Asset, Finite-Lived Compensation Actually Paid vs. Total Shareholder Return Compensation Actually Paid vs. Total Shareholder Return [Text Block] Government-sponsored enterprises U.S. government-sponsored enterprises US Government-sponsored Enterprises Debt Securities [Member] Fair Value as of Grant Date Award Grant Date Fair Value Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Arrangement Duration Trading Arrangement Duration Unearned income, unamortized premiums and discounts and deferred fees and costs Financing Receivable, Unamortized Loan Cost (Fee) and Purchase Premium (Discount) Entity Address, Postal Zip Code Entity Address, Postal Zip Code Entity Registrant Name Entity Registrant Name Basis of Presentation and Informational Disclosures Organization, Consolidation, Basis of Presentation, Business Description and Accounting Policies [Text Block] Due after five years through ten years Debt Securities, Available-for-sale, After Five Through Ten Years, Gross Unrealized Gain Represents the gross unrealized gains for securities, at a point in time, which are categorized neither as held-to-maturity nor trading securities and which are expected to mature after five years and through ten years from the balance sheet date. Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] Consolidated revenues Revenues Intangible asset - gross 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] Total mortgage-backed securities Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Fair Value Noncash write-down of other assets Impairment of Real Estate Intangible Asset, Finite-Lived, Class [Domain] Intangible Asset, Finite-Lived, Class [Domain] Schedule of assets and liabilities measured at fair value on a recurring basis Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] All Award Types Award Type [Domain] Disclosures About Fair Value of Financial Instruments Fair Value Disclosures [Text Block] Level 3 Level 3 Fair Value, Inputs, Level 3 [Member] U.S. government and agencies Debt issued by the U.S. government-sponsored enterprises US Government Agencies Debt Securities [Member] For the year ending December 31, 2027 Intangible Asset, Finite-Lived, Estimated Amortization Expense, Year One Share price (in dollars per share) Share Price Liability recognized for the obligations Contract with Customer, Liability Amortized cost basis of collateral-dependent loans Financing Receivable, Amortized Cost Of Collateral Dependent Loans Financing Receivable, Amortized Cost Of Collateral Dependent Loans Interest-bearing demand deposits Interest-Bearing Domestic Deposit, Checking Other assets Other Assets 30-59 days delinquent Financial Asset, 30 to 59 Days Past Due [Member] Legal Entity [Axis] Legal Entity [Axis] Schedule of loans with payment default and modified Financing Receivable, Modified, Subsequent Default [Table Text Block] Noninterest income: Noninterest Income [Abstract] 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 Intangible Asset, Finite-Lived [Table] Intangible Asset, Finite-Lived [Table] Non-NEOs Non-NEOs [Member] Cash consideration paid Payments to Acquire Businesses, Gross For the year ending December 31, 2028 Intangible Asset, Finite-Lived, Estimated Amortization Expense, Year Two Dividends paid Dividends, Cash Fair value Fair value Debt Securities, Held-to-Maturity, Fair Value, Maturity [Abstract] Allowance for Credit Losses and Provision for Credit Losses Update Credit Loss, Financial Instrument [Policy Text Block] Schedule of borrowed funds Schedule of Debt [Table Text Block] Net amounts of liabilities presented in the consolidated of condition Derivative Liability, Subject to Master Netting Arrangement, before Offset of Collateral Long-Term Debt, Type [Domain] Long-Term Debt, Type [Domain] Due after five years through ten years 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 Statistical Measurement [Axis] Statistical Measurement [Axis] Schedule of gain (loss) on derivative instruments Derivative Instruments, Gain (Loss) [Table Text Block] Award Type Award Type [Axis] Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Retained earnings Retained Earnings (Accumulated Deficit) Change in fair value of interest rate swaps, net of tax of ($216), $246, ($490), and $624, respectively Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax, Parent Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Pension benefits Pension Plan [Member] Federal Home Loan Bank stock Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Federal Home Loan Bank Stock Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Federal Home Loan Bank Stock Common stock Common Stock [Member] Securities available-for-sale Total debt securities Debt Securities, Available-for-Sale LNB Trust II L N B Statutory Trust I I [Member] Represents information pertaining to LNB Statutory Trust II, a Connecticut statutory trust. Cash and securities collateral Cash And Securities Collateral Cash And Securities Collateral Year five, charge-offs Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff Estimated amortization expense Intangible Asset, Finite-Lived, after Accumulated Amortization, Estimated Amortization Expense, Fiscal Year Maturity [Abstract] Derivative Contract [Domain] Derivative Contract [Domain] Total delinquency Financial Asset, Past Due [Member] Total liabilities and shareholders’ equity Liabilities and Equity Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items] Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items] Personal Banking Personal Banking [Member] Represents information pertaining to personal banking. Employee Stock Option Share-Based Payment Arrangement, Option [Member] Issued May 31, 2023 Interest Rate Swap, Issued May 31, 2023 Contract Three [Member] Interest Rate Swap, Issued May 25, 2023 [Member] Segments [Axis] Segments [Axis] Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Tabular List, Table Tabular List [Table Text Block] Number of statutory business trusts owned Number Of Business Trusts Owned Represents the number of business trusts owned by the entity. Total term notes payable to the FHLB Notes Payable to Banks [Member] Schedule of the fair value and gross unrealized losses on investment securities, aggregated by investment category and length of time individual securities have been in a continuous unrealized loss position Unrealized Gain (Loss) on Investments [Table Text Block] 12 months or more - Fair value Held To Maturity And Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value This item represents the aggregate fair value of investments in debt and equity securities categorized as held-to-maturity and available-for-sale securities that have been in a continuous unrealized loss position for twelve months or longer. For the year ending December 31, 2029 Intangible Asset, Finite-Lived, Estimated Amortization Expense, Year Three For the year ending December 31, 2026 Intangible Asset, Finite-Lived, Estimated Amortization Expense, Remainder of Fiscal Year Name Awards Close in Time to MNPI Disclosures, Individual Name Due after five years through ten years Due after five years through ten years Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss, Maturity, Allocated and Single Maturity Date, after Year 5 through 10 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] Northwest Bancorp Capital Trust III Northwest Bancorp Capital Trust I I I [Member] Represents information pertaining to Northwest Bancorp Capital Trust III, a Delaware statutory business trust. Financing Receivable Portfolio Segment [Axis] Financing Receivable Portfolio Segment [Axis] Loan foreclosures and repossessions Transfer of Other Real Estate and Other Repossessed Personal Property Value of real estate and repossessed personal property transferred in noncash transactions during the reporting period. Preferred stock, $0.01 par value: 50,000,000 authorized, no shares issued Preferred Stock, Value, Issued Adjustment to Compensation: Adjustment to Compensation [Axis] FHLB stock Investment in Federal Home Loan Bank Stock, Fair Value Disclosure Loans, net Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed, Loans Receivable Represents the amount of loans receivable acquired at the acquisition date. Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Interest paid, net Interest Paid, Excluding Capitalized Interest, Operating Activity Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract] Recognized amounts of identifiable assets acquired and (liabilities assumed), at fair value Business Combination, Recognized Asset Acquired to Liability Assumed, Excess (Less) [Abstract] Hedging Designation [Axis] Hedging Designation [Axis] 60-89 days delinquent Financial Asset, 60 to 89 Days Past Due [Member] Credit Facility [Axis] Credit Facility [Axis] Total financial assets Total assets Assets, Fair Value Disclosure Proceeds from sale of real estate owned Proceeds from Sale of Foreclosed Assets Name Measure Name Pay vs Performance Disclosure [Line Items] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] GNMA Government National Mortgage Association Certificates and Obligations (GNMA) [Member] Debt Instrument [Line Items] Debt Instrument [Line Items] Loans Insured or Guaranteed by Government Authorities [Axis] Loans Insured or Guaranteed by Government Authorities [Axis] Loans receivable Interest and Fee Income, Financing Receivable Additional paid-in capital Additional Paid-in Capital [Member] Due after five years through ten years Debt Securities, Held-to-Maturity, After Five Through Ten Years, Gross Unrealized Loss Debt Securities, Held-to-Maturity, After Five Through Ten Years, Gross Unrealized Loss Goodwill impairment Goodwill, Impairment Loss Derivative assets, netting adjustments Derivative Asset, Subject to Master Netting Arrangement, Gross Liability and Collateral, Obligation to Return Cash, Offset Accrued interest receivable Accrued interest receivable Interest Receivable Name Trading Arrangement, Individual Name Gain on sale of investments Debt and Equity Securities, Gain (Loss) Company Selected Measure Amount Company Selected Measure Amount Accounts and Financing Receivables [Table] Accounts and Financing Receivables [Table] Non-PEO NEO Non-PEO NEO [Member] Risk participation agreements Credit Risk Contract [Member] Total noninterest expense Noninterest Expense Award Timing Method Award Timing Method [Text Block] Remaining term (in months) Derivative, Remaining Maturity Net increase in cash and cash equivalents Net increase in cash and cash equivalents Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Schedule of loan portfolio with initial ACL acquisition on PCD loans Schedule Of Financial Assets With Purchased Credit Deterioration [Table Text Block] Schedule Of Financial Assets With Purchased Credit Deterioration Liability derivatives, notional amount Derivative Liability, Notional Amount Equipment Equipment Collateral-Dependent Loans [Member] Equipment Collateral-Dependent Loans [Member] Amortization of the net loss Defined Benefit Plan, Amortization of Gain (Loss) Net income Net income Net income - treasury stock method - Basic and Diluted Net Income (Loss) Attributable to Parent Long-Term Debt, Type [Axis] Long-Term Debt, Type [Axis] Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Financing Receivable, Past Due [Table] Financing Receivable, Past Due [Table] Penns Woods Penns Woods Bancorp, Inc. [Member] Penns Woods Bancorp, Inc. Restatement Determination Date: Restatement Determination Date [Axis] Schedule of changes in accumulated other comprehensive income by component Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Fixed rate agency CMOs Fixed Rate Agency CMOs Mortgage Backed Securities [Member] Fixed Rate Agency CMOs Mortgage Backed Securities Due after one year through five years Debt Securities, Available-for-sale, After One Through Five Years, Gross Unrealized Loss Represents the gross unrealized losses for securities, at a point in time, which are categorized neither as held-to-maturity nor trading securities and which are expected to mature after one year and through five years from the balance sheet date. Borrowed funds, netting adjustments Security Loaned, Subject to Master Netting Arrangement, Asset Offset Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block] Due after ten years Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss, Maturity, Allocated and Single Maturity Date, after Year 10 Statistical Measurement [Domain] Statistical Measurement [Domain] Variable rate pass-through Variable Rate Pass-Through Mortgage Backed Securities [Member] Variable Rate Pass-Through Mortgage Backed Securities Document Fiscal Year Focus Document Fiscal Year Focus Gross amounts offset in the consolidated statement of financial condition Derivative Liability, Subject to Master Netting Arrangement, Asset Offset Due after ten years Debt Securities, Available-for-sale, After Ten Years, Gross Unrealized Gain Represents the gross unrealized gains for securities, at a point in time, which are categorized neither as held-to-maturity nor trading securities and which are expected to mature after ten years from the balance sheet date. Total deposits Deposits Common stock, $0.01 par value: 500,000,000 shares authorized, 146,396,520 and 146,107,964 shares issued and outstanding, respectively Common Stock, Value, Issued Net depreciation, amortization and accretion Depreciation, Amortization and Accretion, Net Deposits Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deposits Liabilities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deposits Liabilities Revolving line of credit, FHLB of Pittsburgh Line of Credit [Member] Restatement Determination Date Restatement Determination Date Expected return on plan assets Defined Benefit Plan, Expected Return (Loss) on Plan Assets Other expenses Other Noninterest Expense Less: Dividends and undistributed earnings allocated to participating securities Participating Securities, Distributed and Undistributed Earnings (Loss), Basic Amendment Flag Amendment Flag Total marketable securities available-for-sale Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax Standby Letters of Credit Standby Letters of Credit [Member] Net (gain)/loss on sale of assets Gain (Loss) on Disposition of Other Assets Investments [Domain] Investments [Domain] Adjustment to Non-PEO NEO Compensation Footnote Adjustment to Non-PEO NEO Compensation Footnote [Text Block] Transfers from Level 3 Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3 Entity Address, State or Province Entity Address, State or Province Nonaccrual loans with an allowance Financing Receivable, Excluding Accrued Interest, Nonaccrual PEO Total Compensation Amount PEO Total Compensation Amount Expenditures for segment assets Segment Reporting, Long-Lived Asset, Expenditure for Addition Derivative, notional amount Notional amount Derivative, Notional Amount Weighted average common shares outstanding, basic (in shares) Weighted Average Number of Shares Outstanding, Basic Issued May 11, 2023 Interest Rate Swap, Issued May 11, 2023 [Member] Interest Rate Swap, Issued May 11, 2023 [Member] Fair Value, by Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping [Table] Real estate owned, net, measurement input Other Real Estate Owned, Measurement Input Credit quality indicators Financing Receivable, Credit Quality Indicator [Line Items] Due after five years through ten years Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 5 Through 10 Interest income, accrual method Financing Receivable, Nonaccrual, Interest Income Number of full service financial centers Number Of Full Service Financial Centers Number Of Full Service Financial Centers Estimated pull-through rate Measurement Input, Pull-Through Rate [Member] Measurement Input, Pull-Through Rate Financing Receivable, Nonaccrual, Including Nonaccrual With No Allowance [Roll Forward] Financing Receivable, Nonaccrual, Including Nonaccrual With No Allowance Roll Forward [Roll Forward] Financing Receivable, Nonaccrual, Including Nonaccrual With No Allowance Roll Forward Total noninterest income Noninterest Income Amortized cost Debt Securities, Available-for-Sale, Amortized Cost, Fiscal Year Maturity [Abstract] Defined benefit plan, net gain, tax Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, Tax Employee benefit plans Defined Benefit Plan Disclosure [Line Items] Loans Receivable Loans, Notes, Trade and Other Receivables Disclosure [Text Block] Consideration paid: Business Combination, Consideration Transferred [Abstract] Time deposits Time Deposits Award Timing MNPI Disclosure Award Timing MNPI Disclosure [Text Block] Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Net income available to common shareholders - two class method - Basic Net Income (Loss) Available to Common Stockholders, Basic Debt Securities, Held-to-maturity [Table] Debt Securities, Held-to-Maturity [Table] Less: accumulated amortization Intangible Asset, Finite-Lived, Accumulated Amortization Receivable [Domain] Receivable [Domain] Maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Capital debt securities Trust Preferred Issued Total Value The element represents the total face value of cumulative trust preferred securities issued. Collateralized mortgage obligations Collateralized Debt Obligations [Member] Northwest Bancorp Statutory Trust IV Northwest Bancorp Statutory Trust I V [Member] Represents information pertaining to Northwest Bancorp Statutory Trust IV, a Connecticut statutory trust. Loans receivable, net Total loans receivable, net Financing Receivable, Excluding Accrued Interest, after Allowance for Credit Loss Financing Receivable, Modified, Subsequent Default [Table] Financing Receivable, Modified, Subsequent Default [Table] Change in fair value of interest rate swaps, tax Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, Tax Net activity Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases, (Sales), Issuances, (Settlements) MFBC Statutory Trust I MFBC Statutory Trust [Member] MFBC Statutory Trust Member Less: Segment Reporting, Reconciliation [Abstract] Borrowed funds, long-term Long-Term Debt Year three Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year Segment net interest income and noninterest income Net Interest and Noninterest Income Net Interest and Noninterest Income Net cash 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] Due after five years through ten years Debt Securities, Held-to-Maturity, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 5 Through 10 Security Exchange Name Security Exchange Name Derivative liabilities, netting adjustments Derivative Liability, Subject to Master Netting Arrangement, Gross Asset and Collateral, Right to Reclaim Cash, Offset Total marketable securities held-to-maturity Debt Securities, Held-to-Maturity, Excluding Accrued Interest, before Allowance for Credit Loss Valuation Approach and Technique [Axis] Valuation Approach and Technique [Axis] Total financial liabilities Liabilities, Fair Value Disclosure Loans with payment default and modified Financing Receivable, Excluding Accrued Interest, Modified, Subsequent Default Due after one year through five years Due after one year through five years Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss, Maturity, Allocated and Single Maturity Date, after Year One through Five Weighted-average payment deferral in years Financing Receivable, Modified, Weighted Average Payment Deferral, Period Financing Receivable, Modified, Weighted Average Payment Deferral, Period Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] Name Outstanding Recovery, Individual Name Reclassification adjustment for losses included in net income, tax 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] Borrowed funds Interest Expense, Borrowings Amortized cost Amortized cost Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss, Maturity [Abstract] Gross unrealized holding gains Available-for-sale Securities, Debt Maturities, Gross Unrealized Gain [Abstract] Available-for-sale Securities, Debt Maturities, Gross Unrealized Gain [Abstract] 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] Pension Adjustments Prior Service Cost Pension Adjustments Prior Service Cost [Member] Amounts reclassified from accumulated other comprehensive income Reclassification from AOCI, Current Period, Net of Tax, Attributable to Parent Savings and checking deposits Savings and Demand Deposits The carrying amount of savings and demand deposits as of the balance sheet date. Collections expense Noninterest Expense, Collection Of Receivables Noninterest Expense, Collection Of Receivables Schedule of Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Axis] Schedule of Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Axis] Change in  defined benefit  pension plans Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member] Credit Cards Issued Credit Cards Issued [Member] Credit Cards Issued Residential mortgage loans Residential mortgage loans Residential mortgage loans Residential Mortgage [Member] Compensation Amount Outstanding Recovery Compensation Amount Individual: Individual [Axis] Total weighted average common shares, diluted (in shares) Weighted Average Number of Shares Outstanding, Diluted Accounts, Notes, Loans and Financing Receivable [Line Items] Accounts, Notes, Loans and Financing Receivable [Line Items] Issued August 9, 2023 Interest Rate Swap, Issued August 9, 2023 Contract Six [Member] Interest Rate Swap, Issued August 9, 2023 Contract Six Entity Emerging Growth Company Entity Emerging Growth Company Total loans receivable, gross Total loans receivable, gross Total loans receivable Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss Underlying Security Market Price Change Underlying Security Market Price Change, Percent Non-agency Loans Insured or Guaranteed by non-US Government Authorities [Member] Derivative Financial Instruments Derivative Instruments and Hedging Activities Disclosure [Text Block] Gross unrealized holding losses Debt Securities, Held-to-Maturity, Accumulated Unrecognized Loss Borrowed funds, short-term Short-Term Debt Gross amounts of recognized liabilities Derivative Liability, Subject to Master Netting Arrangement, before Offset Guarantees Guarantees [Text Block] Intangible Asset, Goodwill and Other [Abstract] Intangible Asset, Goodwill and Other [Abstract] Marketable securities available-for-sale Debt Securities, Available-for-Sale [Line Items] Organization, Consolidation and Presentation of Financial Statements [Abstract] Organization, Consolidation and Presentation of Financial Statements [Abstract] Asset derivatives, notional amount Derivative Asset, Notional Amount Due within one year Debt Securities, Available-for-sale, One Year Or Less, Gross Unrealized Gain Debt Securities, Available-for-sale, One Year Or Less, Gross Unrealized Gain Proceeds from sale of loans held-for-sale Proceeds from Sale, Loan, Held-for-Sale Amortized cost Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss, Maturity, Allocated and Single Maturity Date Year three, charge-offs Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff All Executive Categories All Executive Categories [Member] Valuation Approach and Technique [Domain] Valuation Approach and Technique [Domain] Interest rate lock commitments Interest Rate Lock Commitments [Member] Pension Adjustments Service Cost Pension Adjustments Service Cost [Member] Other comprehensive income net of tax: Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract] Schedule of net periodic costs for the defined benefit pension plans and the post retirement healthcare plans Schedule of Net Benefit Costs [Table Text Block] Processing expenses Information Technology and Data Processing Schedule of computation of basic and diluted earnings per share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Loan originations Originations of Loans Receivable Held for Investment The cash outflow associated with loans originated and held for investment purposes during the period. Debt Disclosure [Abstract] Debt Disclosure [Abstract] Segment Information Segment Reporting [Text Block] Proceeds from maturities and principal reductions of marketable securities available-for-sale Proceeds from Maturities, Prepayments and Calls of Debt Securities, Available-for-Sale Minimum Minimum [Member] Investment Type [Axis] Investment Type [Axis] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Derivative liabilities, before netting Derivative Liability, Gross Liability Including Not Subject to Master Netting Arrangement Credit Rating [Domain] Credit Rating [Domain] [Domain] for Credit Rating [Axis] Liabilities: Liabilities [Abstract] Location, Statement of Income, Balance [Axis] Location, Statement of Income, Balance [Axis] 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] Reconciliation of debt securities measured at fair value on a recurring basis using significant unobservable inputs (Level 3) Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] FNMA Federal National Mortgage Association Certificates and Obligations (FNMA) [Member] Total liabilities Financial Liabilities Fair Value Disclosure Other liabilities Other Liabilities Business Combination [Line Items] Business Combination [Line Items] Net periodic cost Defined Benefit Plan, Net Periodic Benefit Cost (Credit) Other operating income Noninterest Income, Other Operating Income 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 (net of tax) Accumulated Other Comprehensive Income (Loss) [Line Items] Marketable securities held to maturity Schedule of Held-to-Maturity Securities [Line Items] Due after ten years Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 10 Exercise Price Award Exercise Price Marketable securities held-to-maturity (fair value of $550,416 and $605,929, respectively) Amortized cost Debt Securities, Held-to-Maturity, Excluding Accrued Interest, after Allowance for Credit Loss Recurring Fair Value, Recurring [Member] Segment Reporting [Line Items] Segment Reporting [Line Items] 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] Municipal securities States and political subdivisions US States and Political Subdivisions Debt Securities [Member] Special mention Special Mention [Member] Year four, charge-offs Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff Proceeds from sale of marketable securities available-for-sale Proceeds from Sale of Debt Securities, Available-for-Sale Accrued interest payable Interest Payable Repayments of long-term borrowings Repayments of Long-Term Debt Derivative liabilities Derivative Liability [Abstract] Awards Close in Time to MNPI Disclosures, Table Awards Close in Time to MNPI Disclosures [Table Text Block] Equity Component [Domain] Equity Component [Domain] Measurement Input Type [Domain] Measurement Input Type [Domain] Loans receivable, net Loans individually assessed Loans Receivable, Fair Value Disclosure Accrued interest payable Accrued Liabilities, Fair Value Disclosure Adoption Date Trading Arrangement Adoption Date Title Trading Arrangement, Individual Title Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount Universal Preferred Trust Universal Preferred Trust [Member] Universal Preferred Trust Member Restatement does not require Recovery Restatement Does Not Require Recovery [Text Block] Borrowed funds and derivative liabilities, netting adjustments Derivative Liability, Security Sold under Agreement to Repurchase, and Security Loaned, Subject to Master Netting Arrangement, Asset Offset Securities held-to-maturity Fair value Debt Securities, Held-to-Maturity, Fair Value Taxable investment securities Interest Income, Securities, Operating, Taxable Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] Derivative Instruments, Gain (Loss) [Line Items] Derivative Instruments, Gain (Loss) [Line Items] Loans individually assessed, measurement input Loans Receivable, Measurement Input Loans Receivable, Measurement Input Business Combination [Domain] Business Combination [Domain] Non-credit discount at acquisition Financing Receivable, Purchased with Credit Deterioration, Discount (Premium) Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Net Income [Text Block] Financial Asset, Period Past Due [Domain] Financial Asset, Aging [Domain] Weighted Average Weighted Average [Member] Components of net periodic benefit cost Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract] All Adjustments to Compensation All Adjustments to Compensation [Member] Core Deposits Core Deposits [Member] Business Combination [Axis] Business Combination [Axis] Net cash provided by operating activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Substandard Substandard [Member] Interest-earning deposits Interest Income, Deposits with Financial Institutions Income Statement [Abstract] Income Statement [Abstract] Shareholders’ equity: Equity, Attributable to Parent [Abstract] Document Transition Report Document Transition Report Union National Capital Trust I Union National Capital Trust I [Member] Union National Capital Trust I [Member] Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] Schedule of intangible assets subject to amortization Intangible Asset, Finite-Lived [Table Text Block] City Area Code City Area Code Marketing expenses Marketing Expense Gain on sale of SBA loans Gain (Loss) On Sale Of Small Business Administration Loans Gain (Loss) On Sale Of Small Business Administration Loans Fixed rate pass-through Fixed Rate Pass-Through Mortgage Backed Securities [Member] Fixed Rate Pass-Through Mortgage Backed Securities Name Forgone Recovery, Individual Name Union National Capital Trust II Union National Capital Trust II [Member] Union National Capital Trust II [Member] Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Real estate Real Estate Collateral-Dependent Loans [Member] Real Estate Collateral-Dependent Loans [Member] Issued July 31, 2023 Interest Rate Swap, Issued July 31, 2023 Contract Five [Member] Interest Rate Swap, Issued July 31, 2023 Contract Five Entity [Domain] Entity [Domain] Preferred stock, shares issued (in shares) Preferred Stock, Shares Issued Number of free standing drive up facilities Number Of Free Standing Drive Up Facilities Number Of Free Standing Drive Up Facilities Amortization of prior service cost Defined Benefit Plan, Amortization of Prior Service Cost (Credit) Total interest income Interest income Interest and Dividend Income, Operating Financing Receivable, Credit Quality Indicator [Table] Financing Receivable, Credit Quality Indicator [Table] Net gain/(loss) on defined benefit plans Other Comprehensive (Income) Loss, Defined Benefit Plan, after Tax and Reclassification Adjustment, Attributable to Parent Loans held for sale Loan, Mortgage, Held-for-Sale, Fair Value Disclosure (Increase)/decrease in other assets Increase (Decrease) in Other Operating Assets Net increase in deposits Increase (Decrease) in Deposits Gross amounts offset in the consolidated statement of financial condition Derivative Asset, Subject to Master Netting Arrangement, Liability Offset Measurement Basis [Axis] Measurement Basis [Axis] Exercise of stock options (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period Fair Value Measurement Inputs and Valuation Techniques [Line Items] Fair Value Measurement Inputs and Valuation Techniques [Line Items] Due after five years through ten years Debt Securities, Held-to-Maturity, After Five Through Ten Years, Gross Unrealized Gain Debt Securities, Held-to-Maturity, After Five Through Ten Years, Gross Unrealized Gain Earnings Per Share, Two-Class Method Earnings Per Share, Two-Class Method [Member] Due within one year Due within one year Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, Year One Schedule of loan portfolio by portfolio segment and by class of financing receivable Schedule of Loans by Portfolio Segment and Class of Financing Receivable [Table Text Block] Tabular disclosure of information related to loans by portfolio segment and by class of financing receivable. Revolving loans, charge-offs Financing Receivable, Excluding Accrued Interest, Revolving, Writeoff Unrealized  losses on securities  available-for-sale AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-Sale, Parent [Member] Cash and cash equivalents Business Combination, Recognized Asset Acquired, Cash and Cash Equivalent Erroneously Awarded Compensation Recovery Erroneously Awarded Compensation Recovery [Table] Schedule of quantitative information about assets measured at fair value on a recurring and nonrecurring basis for Level 3 fair value measurements Fair Value Measurement Inputs and Valuation Techniques [Table Text Block] Unrealized holding (losses)/gains, net of tax of $1,697, ($1,180), $5,127, and ($5,663), respectively OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment, after Tax Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income (Loss) [Table] Entity Current Reporting Status Entity Current Reporting Status Net cash provided by financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Total Shareholder Return Amount Total Shareholder Return Amount Service charges and fees Fees and Commissions, Mortgage Banking and Servicing Effective rate Derivative, Effective Interest Rate Derivative, Effective Interest Rate Gross unrealized holding losses Available-for-sale Securities, Unrealized Losses [Abstract] Available-for-sale Securities, Unrealized Losses [Abstract] Schedule of pro forma information Business Combination, Pro Forma Information [Table Text Block] Adjustments to reconcile net income to net cash provided by operating activities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity [Abstract] Weighted-average term extension in months Financing Receivable, Modified, Weighted-Average Term Increase from Modification Premises and equipment, net Property, Plant, and Equipment, after Accumulated Depreciation, Depletion, and Amortization Interest cost Defined Benefit Plan, Interest Cost Financial Instruments [Domain] Financial Instruments [Domain] Year five Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year Other revenue Other Income Derivative assets Asset derivatives, fair value Derivative Asset Total - Fair value Held To Maturity And Available For Sale Securities Continuous Unrealized Loss Position Fair Value This item represents the aggregate fair value of investments in debt and equity securities in an unrealized loss position which are categorized as held-to-maturity and available-for-sale securities. Intangible Asset, Finite-Lived, Class [Axis] Intangible Asset, Finite-Lived, Class [Axis] Exercise of stock options Stock Issued During Period, Value, Stock Options Exercised Goodwill and Other Intangible Assets Intangible Asset and Goodwill [Text Block] Underlying Securities Award Underlying Securities Amount Estimated fair value Estimate of Fair Value Measurement [Member] Combination term extension and interest rate reduction Extended Maturity and Interest Rate Reduction [Member] Derivative Asset, Statement of Financial Position [Extensible Enumeration] Derivative Asset, Statement of Financial Position [Extensible Enumeration] Due after one year through five years Debt Securities, Available-for-sale, After One Through Five Years, Gross Unrealized Gain Represents the gross unrealized gains for securities, at a point in time, which are categorized neither as held-to-maturity nor trading securities and which are expected to mature after one year and through five years from the balance sheet date. Significant unrealized appreciation or depreciation in financial instruments Fair Value Measurement with Unobservable Inputs Reconciliation Recurring Basis Financial Instruments Total Unrealized Gains (Losses) Period Increase (Decrease) The increase (decrease) of financial instruments measured at fair value on a recurring basis using unobservable inputs (Level 3) which have taken place during the period. Such increase (decrease) may be comprised of changes in fair value (gains or losses) unrealized. Segment Reporting [Table] Segment Reporting [Table] Loans modified in period Financing Receivable, Excluding Accrued Interest, Modified in Period, Amount Provision for credit losses Provision for credit losses Provision for Loan, Lease, and Other Losses Number of derivatives Derivative, Number of Instruments Held Home equity loans Home Equity Loan [Member] Guarantees [Abstract] Guarantees [Abstract] Investing activities: Cash Provided by (Used in) Investing Activity, Continuing Operation [Abstract] Schedule of the portfolio of investment securities available-for-sale Schedule of Available-for-Sale Securities Reconciliation [Table Text Block] Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] All Trading Arrangements All Trading Arrangements [Member] Other Performance Measure, Amount Other Performance Measure, Amount Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Current Fiscal Year End Date Current Fiscal Year End Date Schedule of credit quality of held-to-maturity securities Debt Securities, Held-to-Maturity, Credit Quality Indicator [Table Text Block] Non-PEO NEO Average Total Compensation Amount Non-PEO NEO Average Total Compensation Amount Current period provision Financing Receivable, Excluding Accrued Interest, Credit Loss Expense (Reversal) Derivative [Line Items] Derivative [Line Items] Stock-based compensation expense (in shares) Shares Issued, Shares, Share-Based Payment Arrangement, before Forfeiture Private Label Credit Card Facilities Private Label Credit Card Facilities [Member] Private Label Credit Card Facilities Net amounts of assets presented in the consolidated of condition Derivative Asset, Subject to Master Netting Arrangement, before Offset of Collateral Estimated cost to sell Measurement Input, Cost to Sell [Member] Common shares returned (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] Entity File Number Entity File Number Net increase/(decrease) in short-term borrowings Proceeds from (Repayments of) Short-Term Debt Proceeds from bank-owned life insurance Proceeds from Life Insurance Policy Decrease/(increase) in interest expense Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Measure: Measure [Axis] Schedule of the actual aggregate amortization expense as well as estimated aggregate amortization expense, based upon current levels of intangible assets Schedule of Amortization Expense [Table Text Block] Tabular disclosure of the amount of amortization expense and estimated amortization expense for intangible assets. Tax-free investment securities Interest Income, Securities, Operating, Tax Exempt Gain on sale of SBA loans Gain On Sale Of SBA Loans, Net Gain On Sale Of SBA Loans, Net Equity Components [Axis] Equity Components [Axis] Repurchase amount Debt Instrument, Repurchase Amount 12 months or more - Unrealized loss Held To Maturity And Available For Sale Securities Continuous Unrealized Loss Position 12 Months Or Longer Aggregate Losses Amount of the excess of amortized cost basis over fair value of securities that have been in a loss position for twelve months or longer for securities which are categorized as held-to-maturity and available-for-sale securities. Entity Interactive Data Current Entity Interactive Data Current Due after one year through five years Due after one year through five years Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year One Through Five Reclassification adjustment for (gains)/losses included in net income, net of tax of $214, $0, $216, and $0, respectively Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax Entity Small Business Entity Small Business Total comprehensive income Comprehensive Income (Loss), Net of Tax, Attributable to Parent Actuarial reclassification adjustments for prior period service costs and actuarial gains included in net income, tax Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, Tax Acquired finite-lived intangible assets weighted average useful life Intangible Asset, Finite-Lived, Acquired, Weighted-Average Amortization Period Gross unrealized holding losses Held-to-maturity Securities, Unrealized Losses [Abstract] Held-to-maturity Securities, Unrealized Losses [Abstract] Net interest income Interest Income (Expense), Operating MNPI Disclosure Timed for Compensation Value MNPI Disclosure Timed for Compensation Value [Flag] Financing activities: Cash Provided by (Used in) Financing Activity, Continuing Operation [Abstract] Document Type Document Type Due after ten years Debt Securities, Held-to-Maturity, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 10 Assets and liabilities measured at fair value on a recurring basis Fair value measurement for nonrecurring assets that had a fair market value below the carrying amount Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Due after five years through ten years Debt Securities, Available-for-sale, After Five Through Ten Years, Gross Unrealized Loss Represents the gross unrealized losses for securities, at a point in time, which are categorized neither as held-to-maturity nor trading securities and which are expected to mature after five years and through ten years from the balance sheet date. Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Local Phone Number Local Phone Number Other post-retirement benefits Other Postretirement Benefits Plan [Member] Credit limit Financing Receivable, Commitments, Authorized Credit Limit Financing Receivable, Commitments, Authorized Credit Limit Federal Home Loan Bank of Pittsburgh Federal Home Loan Bank of Pittsburgh [Member] Hedging derivatives: Summary of Derivative Instruments by Hedge Designation [Abstract] Income before income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Net unrealized holding gains/(losses) on marketable securities: OCI, Debt Securities, Available-for-Sale, Gain (Loss), after Adjustment and Tax [Abstract] Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] For the year ending December 31, 2030 Intangible Asset, Finite-Lived, Estimated Amortization Expense, Year Four Executive Category: Executive Category [Axis] Receivable Type [Axis] Receivable Type [Axis] Due after one year through five years Debt Securities, Held-to-Maturity, After One Through Five Years, Gross Unrealized Loss Debt Securities, Held-to-Maturity, After One Through Five Years, Gross Unrealized Loss Liabilities and shareholders’ equity Liabilities and Equity [Abstract] Loans held for sale, measurement input Loan, Held-for-Sale, Measurement Input 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] PEO Name PEO Name Total mortgage-backed securities Debt Security, Mortgage-Backed, Available-for-Sale, Fair Value Disclosure Change in  fair value  of interest  rate swaps Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member] Financial liabilities: Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract] Income taxes Income Tax Paid, before Refund Received Other segment items Segment Reporting, Other Segment Item, Amount Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Entity Tax Identification Number Entity Tax Identification Number Cash and cash equivalents Cash and Due from Banks Schedule of loan delinquencies Financing Receivable, Past Due [Table Text Block] Current Financial Asset, Not Past Due [Member] Issued May 19, 2023 Interest Rate Swap, Issued May 19, 2023, Contract Two [Member] Interest Rate Swap, Issued May 19, 2023, Contract Two [Member] Total cash and cash equivalents and marketable securities Cash, Cash Equivalents and Marketable Securities Cash, cash equivalents and marketable securities. Residential First Mortgage and Other Loans Residential First Mortgage And Other Loans [Member] Residential First Mortgage And Other Loans Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Income from bank-owned life insurance 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] Interest on deposits and borrowings (including interest credited to deposit accounts of $85,455 and $80,748, respectively) Cash Paid for Interest on Deposits and Borrowings This element represents the interest paid on deposits and borrowings during the reporting period. Measurement Frequency [Domain] Measurement Frequency [Domain] Other liabilities Business Combination, Recognized Liability Assumed, Other Liability, Noncurrent Noncash compensation expense related to stock benefit plans Share-Based Payment Arrangement, Noncash Expense Interest expense: Less: Interest Expense, Operating and Nonoperating [Abstract] Compensation and employee benefits Labor and Related Expense Debt issuance amortization period (in years) Debt Issuance Costs, Amortization Period Debt Issuance Costs, Amortization Period Proceeds from maturities and principal reductions of marketable securities held-to-maturity Proceeds from Maturities, Prepayments and Calls of Held-to-Maturity Securities Basic earnings per share (in dollars per share) Earnings Per Share, Basic Measurement Input Type [Axis] Measurement Input Type [Axis] Schedule of capital debt securities and junior subordinated deferrable interest debentures Schedule of Capital Debt Securities and Junior Subordinated Deferrable Interest Debentures [Table Text Block] Schedule of Capital Debt Securities and Junior Subordinated Deferrable Interest Debentures Insider Trading Arrangements [Line Items] Non-hedging swap derivatives: Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net [Abstract] Net unrealized holding (losses)/gains on marketable securities Other Comprehensive Income (Loss), Available-for-Sale Securities Adjustment, Net of Tax, Portion Attributable to Parent 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] Cover [Abstract] Reclassifications Reclassification, Comparability Adjustment [Policy Text Block] Fair Value Measurement Inputs and Valuation Techniques [Table] Fair Value Measurement Inputs and Valuation Techniques [Table] Year two, charge-offs Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff Equity Awards Adjustments Equity Awards Adjustments [Member] Carrying amount and estimated fair value of the entity's financial instruments included in the consolidated statement of financial condition Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] (Increase)/decrease in other liabilities Increase (Decrease) in Other Operating Liabilities Revolving loans converted to term loans, charge-offs Financing Receivable, Excluding Accrued Interest, Revolving, Converted to Term Loan, Writeoff Pass Pass [Member] Schedule of loans receivable Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] Amortizable intangible assets: Intangible Asset, Finite-Lived, after Accumulated Amortization [Abstract] Junior subordinated debentures Junior subordinated debentures Junior Subordinated Debenture Owed to Unconsolidated Subsidiary Trust Gross unrealized holding gains Held-to-maturity Securities, Debt Maturities, Gross Unrealized Gain [Abstract] Held-to-maturity Securities, Debt Maturities, Gross Unrealized Gain [Abstract] For the year ending December 31, 2031 Intangible Asset, Finite-Lived, Estimated Amortization Expense, Year Five Office operations General and Administrative Expense Preferred stock, shares authorized (in shares) Preferred Stock, Shares Authorized Commercial Banking Commercial Banking [Member] Commercial Banking Hedging Designation [Domain] Hedging Designation [Domain] Other Other Collateral-Dependent Loans [Member] Other Collateral-Dependent Loans [Member] Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Aggregate Available Trading Arrangement, Securities Aggregate Available Amount AA+ AA Plus Rating [Member] AA Plus Rating [Member] Real estate owned, net Real Estate Acquired Through Foreclosure Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Total consideration Total consideration paid Business Combination, Consideration Transferred Retirement Plan Type [Domain] Retirement Plan Type [Domain] Entity Filer Category Entity Filer Category Variable rate agency CMOs Variable Rate Agency CMOs Mortgage Backed Securities [Member] Variable Rate Agency CMOs Mortgage Backed Securities Borrowings Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Borrowings Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Borrowings Schedule of Offsetting liabilities Offsetting Liabilities [Table Text Block] Foreign exchange swaps Foreign exchange swap agreements Currency Swap [Member] Vehicle loans Automobile Loan [Member] Defined benefit plan: Other Comprehensive (Income) Loss, Defined Benefit Plan, after Tax and Reclassification Adjustment, Attributable to Parent [Abstract] Federal deposit insurance premiums Federal Deposit Insurance Corporation Premium Expense, Net Federal Deposit Insurance Corporation Premium Expense, Net Financial Asset, Period Past Due [Axis] Financial Asset, Aging [Axis] Not Hedging Interest rate swaps not designated as hedging instruments Not Designated as Hedging Instrument [Member] Other segment disclosures Segment Reporting, Reconciliation of Other Item by Segment to Consolidated [Abstract] Investments, Debt and Equity Securities [Abstract] Investments, Debt and Equity Securities [Abstract] Entity Address, Address Line Two Entity Address, Address Line Two Changes in allowance for losses on allocated loans receivable Allowance for Loan and Lease Losses [Roll Forward] Cash paid per share (in dollars per share) Business Combination, Price Per Share Reconciliation of revenue Segment, Reconciliation Of Revenue [Abstract] Segment, Reconciliation Of Revenue Financial Instruments Subject to Mandatory Redemption, Financial Instrument [Domain] Financial Instruments Subject to Mandatory Redemption, Financial Instrument [Domain] Borrowed funds before netting Securities Loaned, Gross Including Not Subject to Master Netting Arrangement Derivative liabilities Liability derivatives, fair value Derivative Liability Total revenues Business Combination, Pro Forma Information, Pro Forma Revenue Entity Address, Address Line One Entity Address, Address Line One Federal and state income taxes expense Income tax expense Income Tax Expense (Benefit) Net discount at acquisition Financing Receivable, Unamortized Purchase Premium (Discount) Charge-offs Total loans receivable, charge-offs Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff Schedule of Impaired Financing Receivable [Table] Schedule of Impaired Financing Receivable [Table] Changes in accumulated other comprehensive income by component AOCI Attributable to Parent, Net of Tax [Roll Forward] Loan Restructuring Modification [Domain] Loan Restructuring Modification [Domain] Statement [Table] Statement [Table] Proceeds from stock options exercised Proceeds from Stock Options Exercised Noninterest-bearing demand deposits Noninterest-Bearing Domestic Deposit, Checking Derivative contract maturities (in years) Derivative, Contract Term Year two Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year Schedule of the composition of nonaccrual loans by portfolio segment and by class of financing receivable Financing Receivable, Nonaccrual [Table Text Block] Gross amounts of recognized assets Derivative Asset, Subject to Master Netting Arrangement, before Offset Trust and other financial services income Fees And Commissions, Trust Services And Other Income Fees And Commissions, Trust Services And Other Income Loans held-for-sale Loan, Held-for-Sale, Fair Value Disclosure Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items] Debt Securities, Held-to-Maturity, Credit Quality Indicator [Line Items] Composition of impaired loans by portfolio segment and by class of financing receivable Financing Receivable, Impaired [Line Items] Revolving loans converted to term loans during the period Financing Receivable, Excluding Accrued Interest, Revolving, Converted to Term Loan During Period Derivative Instruments and Hedging Activities Disclosure [Abstract] Derivative Instruments and Hedging Activities Disclosure [Abstract]