Entity Address, City or Town Entity Address, City or Town Recorded Investment Impaired Financing Receivable, with Related Allowance, Recorded Investment Finance lease cost Finance Lease Cost Finance lease cost. 3 Private-Label Asset - Backed Securities by Commercial Mortgage Loan [Member] One Private Label Collateralized Mortgage Obligation Securities By Commercial Mortgage Loans [Member] One private label collateralized mortgage obligation securities by commercial mortgage loans. Subordinated loans Junior Subordinated Debentures Fair Value Disclosure This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure. This item represents the aggregate of all Junior subordinated debentures. Net Income (Loss) Available to Common Stockholders, Basic, Total Net income available to common shareholders- Voting Net Income (Loss) Available to Common Stockholders, Basic Fair Value Disclosures [Abstract] Banking House Rents Collected [Member] Banking House Rents Collected [Member] Banking house rents collected. Earnings Per Share [Abstract] Available-for-sale investment securities aggregate, amortized historical cost Available-for-Sale, Amortized Cost Basis, Equity Securities This item represents the cost of equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments for other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any. Level 1 [Member] Fair Value, Inputs, Level 1 [Member] Gross Unrealized Losses Available For Sale Debt And Equity Securities Accumulated Gross Unrealized Loss Before Tax Available for sale debt and equity securities accumulated gross unrealized loss before tax. Average Notional Balance [Member] Average Notional Balance Member Average Notional Balance Member Schedule Of Available For Sale Securities And Held To Maturity Securities [Table] Schedule Of Available For Sale Securities And Held To Maturity Securities [Table] Schedule of available for sale securities and held to maturity securities. Amount attributable to Common Stock and participating warrants Stock Issued During Period, Value, New Issues FINANCING ACTIVITIES Net Cash Provided by (Used in) Financing Activities [Abstract] Term Loans By Origination Year 2020 [Member] Term Loans By Origination Year 2020 [Member] Term Loans By Origination Year 2020 [Member] Increase (Decrease) in Other Operating Assets and Liabilities, Net, Total Net change in other assets and liabilities Increase (Decrease) in Other Operating Assets and Liabilities, Net Dividends per warrant Warrant Dividends Per Share Declared Aggregate dividends declared during the period for each share of warrant outstanding. Fair Value Measurement Fair Value Measurement [Domain] Amendment Flag Amendment Flag Commercial Real Estate [Member] Real Estate [Member] Real Estate Loan [Member] Impaired loans Impaired Loans Fair Value Disclosure This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents impaired loans as presented on the statement of financial position which may include mortgage loans, finance receivables, or any other impaired loans which are due to the Company as of the balance sheet date. Nature of Operations [Line Items] Nature Of Operations [Line Items] Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Operating leases remaining lease term Lessee Operating Leases Remaining Lease Term Lessee, operating leases remaining lease term. Subsequent Event Type [Domain] Secured Consumer Installment Loans Pool 4 [Member] Purchased Secured Consumer Installment Loans Pool4 [Member] Purchased secured consumer installment loans pool 4. Net gains (losses) on sales and redemptions of investment securities Gain (Loss) on Sale of Investments, Total Gain (Loss) on Sale of Investments Net Cash Received (Paid) Recorded In Net Income [Member] Net Cash Received (Paid) Recorded In Net Income Member Net Cash Received (Paid) Recorded In Net Income Member Short-Term Debt, Total Short-term borrowings Short-Term Debt Held to maturity securities Number Of Securities Held To Maturity Number of securities held to maturity. Asset backed securities Asset Backed Securities Disclosure This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents the amount shown on an entity's books for investments in Asset backed securities investment securities. Months of unrealized loss positions Months Of Unrealized Loss Positions Number of months of unrealized loss position. Other Commercial and Industrial [Member] Other Commercial And Industrial [Member] Class of financing receivables related to other commercial and industrial receivables. Goodwill, Ending Balance Goodwill, Beginning Balance Goodwill, Total Goodwill Goodwill A or equivalent Standard & Poor's, A Rating [Member] Operating lease right-of-use assets Operating Lease, Right-of-Use Asset Sub-total Aggregate Of Held To Maturity Securities Debt Maturities Carrying Amount Carrying amount of debt securities accounted for as held-to-maturity, net of adjustments including, but not limited to, accretion, amortization, collection of cash, previous other-than-temporary impairments (OTTI) recognized, and fair value hedge accounting adjustments. Total Loans Receivable Total loans Loans and Leases Receivable, Gross Document Quarterly Report Document Quarterly Report Interest and dividend income: Interest and Dividend Income, Operating [Abstract] Investment Services Revenue [Member] Investment Services Revenue [Member] Investment services revenue. Credit Quality Information [Abstract] Cash basis interest income recognized on impaired loans Impaired Financing Receivable, Interest Income, Cash Basis Method Standby Letters of Credit [Member] Standby Letters of Credit [Member] Statement [Table] Statement [Table] Income tax effect related to other comprehensive (loss) income Tax effect Tax effect Other Comprehensive Income (Loss), Tax Income tax effect related to other comprehensive income (loss) Unallocated [Member] Unallocated [Member] Class of financing receivables related to unallocated financing receivables. Gain (Loss) on Sale of Investments [Abstract] Gain (Loss) on Sale of Investments [Abstract] Commercial and Industrial Loans [Member] Commercial And Industrial [Member] Commercial and industrial. Postretirement Benefits [Member] Other Postretirement Benefits Plan [Member] Operating cash flows from operating leases Operating Lease, Payments Interest Rate Cash Flow Hedge Derivative at Fair Value, Net, Total Interest rate swap derivative cash flow hedges Interest Rate Cash Flow Hedge Derivative at Fair Value, Net Less than twelve months Fair Value Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value Card Income [Member] Credit and Debit Card [Member] Accumulated Other Comprehensive Income Loss [Table] Accumulated Other Comprehensive Income (Loss) [Table] Schedule of Allowance for Loan Losses on Basis of Calculation Methodology Schedule Of Allowance For Loan Losses On Basis Of Calculation Methodology Table [Text Block] Tabular disclosure of allowance for credit losses account by calculation methodology method. Cash dividends paid to common voting shareholders Payments of Ordinary Dividends, Common Stock Recorded Investment Impaired Financing Receivable, with No Related Allowance, Recorded Investment Due in one year or less Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, Year One Debt Securities, Held-to-Maturity, Fair Value, Total Held-to-maturity Securities, Debt Maturities, Fair Value Held-to-maturity securities at fair value Debt Securities, Held-to-Maturity, Fair Value Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss [Abstract] Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss [Abstract] Schedule Of Financing Receivables Past Due [Table] Financing Receivable, Past Due [Table] Tax-exempt Interest Income, Securities, Operating, Tax Exempt Hedging Relationship Hedging Relationship [Domain] Product and Service Product and Service [Axis] Earnings and gain on bank owned life insurance Bank Owned Life Insurance Income Fair Value Hedges Axis Fair Value Hedges Axis Additional Non-accrual Commercial Loan Additional Non-accrual Commercial Loan Available for sale securities continuous unrealized loss position twelve months or more amortized historical cost basis Debt Securities Aggregate Amortized Historical Cost Debt securities aggregate amortized historical cost. Leases Lessee, Operating Leases [Text Block] Average recorded investment [Abstract] Impaired Financing Receivable, Average Recorded Investment [Abstract] Stock Option [Member] Share-Based Payment Arrangement, Option [Member] Level 1, 2 and 3 [Member] Fair Value, Inputs, Level 1, Level 2, and Level 3 [Member] Operating Leases Operating Lease, Weighted Average Remaining Lease Term Amounts reclassified from AOCI Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax Total liabilities and shareholders' equity Liabilities and Equity AOCI Attributable to Parent [Member] AOCI Including Portion Attributable to Noncontrolling Interest [Member] Originations and related party additions Loans and Leases Receivable, Related Parties, Additions Unrealized Gain and Loss on Derivatives and Hedging Activities [Member] Accumulated Gain (Loss), Cash Flow Hedge, Including Noncontrolling Interest [Member] Net gains on sales of loans and foreclosed real estate Net Gains Losses On Sales Of Loans And Foreclosed Real Estate The net gain/loss resulting from a sale of loans, including adjustments to record loans classified as held-for-sale at the lower-of-cost-or-market and fair value adjustments to loan held for investment purposes and the difference between the carrying value and the sale price of real estate. This element refers to the gain/loss included in earnings and not to the cash proceeds of the sale. Corporate Bond [Member] Private Label Mortgaged Backed Securities Not Rated [Member] Private label mortgaged backed securities not rated. Pledged Status [Domain] Troubled Debt Restructuring During Prior Twelve Months [Member] Troubled Debt Restructuring During Prior Twelve Months [Member] Troubled debt restructuring during prior twelve months. Accrued interest receivable Interest Receivable Fair Value Disclosure This element represents the portion of the balance sheet assertion valued at fair value of accrued interest receivables. Measurement Input, Discount Rate [Member] Measurement Input, Discount Rate [Member] Operating Leases: Leases, Operating [Abstract] Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Income Statement [Abstract] Historical loss rate Financing Receivable Allowance For Credit Losses Historical Loss Rate Amount of financing receivables in allowance to historical loss rate. 2024 Lessee, Operating Lease, Liability, Payments, Due Next Rolling 12 Months Sub-total Aggregate Of Available For Sale Securities Debt Maturities Amortized Cost Basis Amount of available-for-sale debt securities at cost, net of adjustments, which include, but are not limited to, accretion, amortization, collection of cash, previous other-than-temporary impairments (OTTI) recognized in earnings (less any cumulative-effect adjustments, as defined) and fair value hedge accounting adjustments. Basis of Presentation Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Finance Leases Finance Lease, Weighted Average Remaining Lease Term Total Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Losses Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Losses 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 Held-to-maturity investment securities Proceeds from Sale of Held-to-Maturity Securities Retirement plan net losses recognized in plan expenses Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, Tax Retirement plan net losses recognized in plan expenses Estimated Fair Value Investment securities - available-for-sale Available-for-sale securities, at fair value Available For Sale Debt And Equity Securities Available for sale debt and equity securities. Due after ten years Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 10 Balance at the beginning of the period Balance at the end of the period Loans and Leases Receivable, Related Parties 2025 Lessee, Operating Lease, Liability, Payments, Due in Rolling Year Two Loss Contingency Nature Loss Contingency Nature [Axis] Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest, Total Comprehensive income, attributable to noncontrolling interest Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest Recurring Basis [Member] Fair Value, Recurring [Member] Total interest expense Interest Expense State and Political Subdivisions [Member] US States and Political Subdivisions Debt Securities [Member] Residential Mortgage Loans [Member] Residential Portfolio Segment [Member] US Treasury, Agencies and GSEs [Member] US Treasury and Government [Member] Foreclosed real estate Repossessed Assets Repossessed Assets, Total Dividends, Preferred Stock, Total Preferred stock dividends declared Dividends, Preferred Stock Number of loans subsequently defaulted Financing Receivable, Troubled Debt Restructuring, Subsequent Default, Number of Contracts Merchant Card Fees [Member] Credit Card, Merchant Discount [Member] Revolving Loan [Member] Revolving Loan [Member] Revolving Loan [Member] Automobile Loans [Member] Automobile Loan [Member] 90 Days and Over [Member] Financial Asset, Equal to or Greater than 90 Days Past Due [Member] Derivative Asset, Total Derivative Asset Derivative Asset Operating Leases Operating Lease, Weighted Average Discount Rate, Percent Total Past Due [Member] Financial Asset, Past Due [Member] Entity Small Business Entity Small Business Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Ending Balance Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Beginning Balance Total cash and cash equivalents Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract] Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Table] Fair Value Measurement Inputs and Valuation Techniques [Table] Tax Exempt Loans [Member] Tax Exempt Loans [Member] Class of financing receivables related to tax exempt loans. Hedging Relationship Hedging Relationship [Axis] Reclassification out of Accumulated Other Comprehensive Income [Member] Reclassification out of Accumulated Other Comprehensive Income [Member] Collateralized Mortgage Obligations - US Agency [Member] Mortgage-Backed Securities, Issued by US Government Sponsored Enterprises [Member] Investments Investments [Domain] Investment Securities Unrealized Loss Position, Percentage Investment Securities Unrealized Loss Position, Percentage Investment Securities Unrealized Loss Position, Percentage Percentage of nonperforming loans Percentage of Nonperforming Loans Percentage of Nonperforming Loans Loans [Member] Loans [Member] Interest Expense, Deposits, Total Interest on deposits Interest Expense, Deposits Building and occupancy Occupancy, Net Class of Financing Receivable, Type of Borrower [Domain] Interest Expense, Short-Term Borrowings, Total Interest on short-term borrowings Interest Expense, Short-Term Borrowings Weighted Average Number of Shares Outstanding, Basic, Total Basic weighted average common shares outstanding- Voting Weighted Average Number of Shares Outstanding, Basic Real estate loans in the process of foreclosure Mortgage Loans in Process of Foreclosure, Amount Finance lease liability Finance Lease, Liability, Total Finance Lease, Liability City Area Code City Area Code Net Gain on Sale of Loans and Foreclosed Real Estate [Member] Net Gains Losses On Sale Of Loans And Foreclosed Real Estate [Member] Net gains losses on sale of loans and foreclosed real estate. Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Number of Positions [Abstract] Composition of Net Periodic Pension and Postretirement Plan Costs Schedule of Net Benefit Costs [Table Text Block] Accumulated Other Comprehensive Income (Loss) Comprehensive Income (Loss) Note [Text Block] Interest Rate Derivatives [Member] Interest Rate Contract [Member] Unrealized holding (losses) gains arising during the period OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment and Tax Voting Common Stock [Member] Voting Common Stock [Member] Voting common stock member. Nonaccrual loans, Segregated by class of loans [Abstract] Financing Receivable Recorded Investments Aging [Abstract] Financing Receivable Recorded Investments Aging. Total liabilities Liabilities Other Assets, Total Other assets Other Assets Document Period End Date Document Period End Date Service Fees, Fee Income, Card Income and Mortgage Fee Income and Realized Gain on Sale of Loans and Foreclosed Real Estate [Member] Banking [Member] Unrated Unrated [Member] Unrated Asset Backed Securities [Member] Asset-Backed Securities [Member] Corporate Corporate Fair Value Disclosure This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents the amount shown on an entity's books for investments in Corporate debt investment securities. Credit Loss Status [Axis] Schedule Of Financing Receivable Recorded Investment Credit Quality Indicator [Table] Financing Receivable, Credit Quality Indicator [Table] Federal Home Loan Bank stock, at cost Federal Home Loan Bank Stock Voting and Series A Non-Voting [Member] Voting And Series A Non Voting [Member] Voting and Series A Non-Voting. Net periodic benefit plan (benefit) cost Defined Benefit Plan, Net Periodic Benefit Cost (Credit) Totals, amortized cost Amortized cost Debt Securities, Available-for-Sale, Amortized Cost Current Balance Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Carrying Amount, Net ATM Fees Surcharge [Member] A T M Fees Surcharge [Member] ATM fees surcharge. Proceeds from (Repayments of) Short-Term Debt, Total Net change in short-term borrowings Proceeds from (Repayments of) Short-Term Debt Statistical Measurement Statistical Measurement [Axis] Interest-Bearing Deposit Liabilities, Total Interest-bearing Interest-Bearing Deposit Liabilities Investment Securities' Gross Unrealized Losses and Fair Value by Investment Category and Length of Time that Individual Securities Have Continuous Unrealized Loss Position Schedule of Unrealized Loss on Investments [Table Text Block] Residential Mortgage-Backed - US Agency [Member] Residential Mortgage-Backed Securities [Member] Less than twelve months Fair Value Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months Qualitative factors Financing Receivable Allowance For Credit Losses Qualitative Factors Amount of financing receivables in allowance to qualitative factors. Stockholders' Equity Attributable to Noncontrolling Interest, Ending Balance Stockholders' Equity Attributable to Noncontrolling Interest, Beginning Balance Stockholders' Equity Attributable to Noncontrolling Interest, Total Noncontrolling interest Stockholders' Equity Attributable to Noncontrolling Interest Operating cash flows from finance leases Finance Lease, Interest Payment on Liability Related Party Related Party [Axis] Total assets Assets Foreclosed real estate, Number of properties Number of Real Estate Properties ASU 2016-02 [Member] Accounting Standards Update 2016-02 [Member] Derivative Contract Derivative Contract [Domain] Cumulative net charge-offs Allowance for Loan and Lease Losses Write-offs, Net Schedule of Real Estate Properties Schedule of Real Estate Properties [Table Text Block] Dividends per preferred share Preferred Stock, Dividends Per Share, Declared Loan Restructuring Modification [Domain] Derivative [Line Items] Derivative [Line Items] Allowance for loan losses: Financing Receivable, Allowance for Credit Loss [Roll Forward] Long-Term Debt, Excluding Current Maturities, Total Long-term borrowings Long-Term Debt, Excluding Current Maturities Earnings Per Share, Diluted, Total Earnings per common share - diluted Earnings Per Share, Diluted Retirement Plan Type Retirement Plan Type [Axis] Assets held-for-sale Assets Held-for-sale, Not Part of Disposal Group, Current Assets Held-for-sale, Not Part of Disposal Group, Current, Total Pre-modification outstanding recorded investment Financing Receivable, Troubled Debt Restructuring, Premodification Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items] Fair Value Measurement Inputs and Valuation Techniques [Line Items] Mutual Funds Ultra Short Mortgage Fund [Member] Mutual Funds Ultra Short Mortgage Funds [Member] This category includes information about ultra short mortgage funds. Pledged Status [Axis] Entity Address, Postal Zip Code Entity Address, Postal Zip Code Allowance for credit losses Allowance for Loan and Lease Losses, Period Increase (Decrease) Lessee, Operating Lease, Liability, to be Paid, Rolling Maturity [Abstract] Unsecured Consumer Loan Pool 1 [Member] Purchased Unsecured Consumer Loan Pool1 [Member] Purchased unsecured consumer loan pool 1 Member. Earnings on bank owned life insurance Bank Owned Life Insurance Income Operating Activities Operating activities earnings on or other increases in the value of the cash surrender value of bank owned life insurance policies. Noninterest income Revenue from Contract with Customer, Including Assessed Tax Construction [Member] Construction Loans [Member] Document Fiscal Period Focus Document Fiscal Period Focus Government Sector [Member] Restricted cash Restricted Cash Restricted Cash, Total Other Financing Receivable Allowance For Credit Losses Other Financing receivable allowance for credit losses other. Stock based compensation and ESOP expense Stock or Unit Option Plan Expense Securities issued by state and political subdivision Securities Issued By State and Political Subdivision [Member] Securities issued by state and political subdivision Pension Benefits [Member] Pension Plan [Member] Conversion of preferred stock, shares converted Conversion of Stock, Shares Converted Derivative [Table] Derivative [Table] APIC, Share-Based Payment Arrangement, Increase for Cost Recognition, Total Stock based compensation APIC, Share-Based Payment Arrangement, Increase for Cost Recognition Net interest income Net interest income Interest Income (Expense), Net Number of securities in unrealized loss positions, twelve months or more Total Number Of Securities Continuous Unrealized Loss Position For Twelve Months Or More Total number of securities continuous unrealized loss position for twelve months or more. Proceeds from redemption of Federal Home Loan Bank stock Proceeds from Sale of Federal Home Loan Bank Stock Operating Lease, Liability, Total Operating lease liabilities Operating Lease, Liability 2028 Lessee, Operating Lease, Liability, Payments, Due in Rolling Year Five Net cash flows from financing activities Net Cash Provided by (Used in) Financing Activities Home Equity Line of Credit [Member] Home Equity Line of Credit [Member] Dividends per non voting common share Non Voting Common Stock Dividends Per Share Declared Non-voting common stock dividends per share declared. Foreclosed Real Estate [Member] Foreclosed Real Estate [Member] Statement of Financial Position [Abstract] Entity File Number Entity File Number Purchase of Federal Home Loan Bank stock Payments to Acquire Federal Home Loan Bank Stock Cash dividends paid to common non-voting shareholders Payments Of Dividends Common Stock Non Voting Share Holders Payments of dividends common stock non-voting share holders. Substandard [Member] Substandard [Member] Statement of Cash Flows [Abstract] 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 Series A Non voting [Member] Series A Nonvoting [Member] Series A nonvoting. Valuation Approach and Technique Valuation Approach and Technique [Domain] Residential mortgage-backed - US agency Residential Mortgage Backed Agency Fair Value Disclosure This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents the amount shown on an entity's books for investments in residential mortgage backed agencies debt investment securities. Pension and Postretirement Benefits Retirement Benefits [Text Block] Non-accrual commercial loan Non-accrual commercial loan Statistical Measurement Statistical Measurement [Domain] Statement of Stockholders' Equity [Abstract] Financing Receivable Allowance For Credit Losses [Line Items] Financing Receivable, Allowance for Credit Loss [Line Items] Net amortization of premiums and discounts on investment securities Amortization of Debt Discount (Premium) Net change in brokered deposits Increase Decrease In Brokered Deposits Refers to Net cash inflow (outflow) of brokered deposits. Unpaid Principal Balance Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance Net unrealized gains on derivatives and hedging activities Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification, before Tax Class of Stock Class of Stock [Domain] Debt securities: Interest and Dividend Income, Securities, by Taxable Status [Abstract] 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 Legal Entity Legal Entity [Axis] Available-for-sale securities, debt maturities, amortized cost [Abstract] Debt Securities, Available-for-Sale, Amortized Cost, Fiscal Year Maturity [Abstract] Components of Lease Expense Lease, Cost [Table Text Block] Real Estate Owned, Disclosure of Detailed Components [Abstract] Available for sale securities unrealized aggregate loss percentage Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Accumulated Loss Percentage Available for sale securities continuous unrealized loss position twelve months or longer accumulated loss percentage. Carrying Amounts and Fair Value of Financial Instruments Fair Value, by Balance Sheet Grouping [Table Text Block] Fair Value Measurements Fair Value Disclosures [Text Block] Reclassification out of Accumulated Other Comprehensive Income Reclassification out of Accumulated Other Comprehensive Income [Axis] Federal Home Loan Bank stock Investment in Federal Home Loan Bank Stock, Fair Value Disclosure Financial Instrument Performance Status [Domain] US Treasury, agencies and GSEs Us Treasury Agencies And Gses Fair Value Disclosure This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents the amount shown on an entity's books for investments in US Treasury, agencies and GSEs debt investment securities. Unsecured Consumer Loan Pool 5 [Member] Purchased Unsecured Consumer Loan Pool5 [Member] Purchased unsecured consumer loan pool 5. Common Stocks by Industry [Member] Common Stocks, by Industry [Member] Data processing Information Technology and Data Processing Residential Mortgage [Member] Residential Mortgage [Member] Unpaid Principal Balance Impaired Financing Receivable, Unpaid Principal Balance Noninterest Income Revenue from Contract with Customer [Text Block] Interest and Fee Income, Loans and Leases, Total Loans, including fees Interest and Fee Income, Loans and Leases Time Deposits Time Deposits Fair Value Disclosure Fair value disclosure of certificate of deposit or savings account held by a bank or other financial institution for a short-term specified period of time. Because of their short-term, time deposits are considered highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition Proceeds from maturities and principal reductions of investment securities held-to-maturity Proceeds from Maturities, Prepayments and Calls of Held-to-Maturity Securities Proceeds from Sale of Loans Held-for-sale, Total Proceeds from sales of loans Proceeds from Sale of Loans Held-for-sale Antidilutive Securities Antidilutive Securities [Axis] Loss Contingency, Nature Loss Contingency, Nature [Domain] Gross Unrealized Gains, Debt investment securities Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax Interest Rate Fair Value Hedge Derivative at Fair Value, Net, Total Interest rate swap derivative fair value hedges Interest Rate Fair Value Hedge Derivative at Fair Value, Net Lessee Lease Description [Line Items] Lessee, Lease, Description [Line Items] Impaired Loans [Member] Impaired Loans [Member] Loans classified as impaired. Period Ending Notional Balance [Member] Period Ending Notional Balance Member Period Ending Notional Balance Member Realized losses on investments Realized Losses On Sale Of Investments The net realized loss on investments sold during the period, not including gains (losses) on securities separately or otherwise categorized as trading, available-for-sale, or held-to-maturity, which, for cash flow reporting, is a component of proceeds from investing activities. Average recorded investment in impaired loans Impaired Financing Receivable, Average Recorded Investment 60-89 Days Past Due [Member] Financial Asset, 60 to 89 Days Past Due [Member] Weighted Average Number of Shares Outstanding, Diluted, Total Diluted weighted average common shares outstanding- Voting Weighted Average Number of Shares Outstanding, Diluted Available-for-sale investment securities Payments For Proceeds From Sale Of Available For Sale Securities Debt Payments for (proceeds from) sale of available for sale securities debt. Loans Loans, Notes, Trade and Other Receivables Disclosure [Text Block] Schedule Of Real Estate Properties Schedule Of Real Estate Properties Insurance agency expense General Insurance Expense Corporate [Member] Corporate Debt Securities [Member] Portion at Fair Value Measurement [Member] [Default] Portion at Fair Value Measurement [Member] Adjustment for the adoption of ASU 2016-13 Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease) Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease), Total Cash Basis Interest Recognized on Impaired Loans [Abstract] Impaired Financing Receivable, Interest Income, Cash Basis Method [Abstract] Less: Allowance for credit losses Less allowance for loan losses Loans and Leases Receivable, Allowance Current Fiscal Year End Date Current Fiscal Year End Date Investment Type Investment Type [Axis] Accrued interest payable Interest Payable Number of securities in unrealized loss positions, twelve months or more Held To Maturity Number Of Securities In Unrealized Loss Positions Twelve Months Or More This element represent the number of held to maturity securities in unrealized loss positions for twelve months or more. Derivative Instruments and Hedging Activities Disclosure [Abstract] Marketable equity securities Marketable Securities, Realized Gain (Loss) Depreciation, Total Depreciation Depreciation Financial Instruments Financial Instruments [Domain] Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Including Disposal Group and Discontinued Operations, Total Cash and cash equivalents at beginning of period Cash and cash equivalents at end of period Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Including Disposal Group and Discontinued Operations Bank owned life insurance Bank Owned Life Insurance Originations of loans held-for-sale Payments for Origination of Mortgage Loans Held-for-sale Restricted Cash and Cash Equivalents, Total Cash and due from banks including restricted cash Restricted Cash and Cash Equivalents Securities pledged to collateralize borrowing Securities Pledged To Collateralize Borrowing This element represent the fair value of securities pledged to collateralize borrowings. Ending balance Beginning balance Total equity Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Entity Address, Address Line One Entity Address, Address Line One Deposits: Deposits [Abstract] Original Balance Debt Instrument Principal Outstanding Debt instrument principal outstanding. Repayments of Long-Term Debt, Total Payments on long-term borrowings Repayments of Long-Term Debt Accrued interest receivable Interest Receivable, Current Defined Benefit Plan, Plan Assets, Category [Axis] Non-controlling Interest [Member] Noncontrolling Interest [Member] Supplemental Balance Sheet Information Related to Leases Schedule Of Supplemental Balance Sheet Information Related To Leases Table [Text Block] Schedule of supplemental balance sheet information related to leases. Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] Noninterest expense: Noninterest Expense [Abstract] CASH PAID DURING THE PERIOD FOR: Supplemental Cash Flow Information [Abstract] Finance Leases Lessee, Finance Lease, Discount Rate Pass [Member] Pass [Member] AA or equivalent, includes securities issued by the United States Government or Government Sponsored Enterprises Standard & Poor's, AA Rating [Member] Investment Securities Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] New Accounting Pronouncements Accounting Standards Update and Change in Accounting Principle [Text Block] Taxable Interest Income, Securities, Operating, Taxable Conversion of stock, description Conversion of Stock, Description 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 Income Tax Expense (Benefit), Total Provision for income taxes Provision for income taxes Income Tax Expense (Benefit) Paycheck Protection Program [Member] Paycheck Protection Program [Member] Paycheck Protection Program. Allowance for credit losses Allowance For Credit Losses [Member] Allowance for credit losses Average Notional Balance Hedged Asset, Fair Value Hedge Unusual or Infrequent Items, or Both [Abstract] Balance Sheet Location Balance Sheet Location [Domain] Changes in the Components of Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract] AOCI Including Portion Attributable to Noncontrolling Interest [Abstract] Charge-offs Financing Receivable, Allowance for Credit Loss, Writeoff Payments to Acquire Property, Plant, and Equipment, Total Purchase of premises and equipment Payments to Acquire Property, Plant, and Equipment Accrued interest payable Accrued Interest Payable Fair Value Disclosure This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure. This item represents the aggregate of all accrued interest payable. Amortized Cost and Estimated Fair Value of Investment Securities Unrealized Gain (Loss) on Investments [Table Text Block] Summary of Fair Value Assets Measured on Nonrecurring Basis Fair Value Measurements, Nonrecurring [Table Text Block] Post-modification outstanding recorded investment Financing Receivable, Troubled Debt Restructuring, Postmodification Held to maturity, gross unrealized losses Debt Securities, Held-to-Maturity, Accumulated Unrecognized Loss Debt investment securities: Debt Investment Securities [Abstract] Debt investment securities [Abstract] Carrying Amounts [Member] Reported Value Measurement [Member] Fair Value Hedges, Net Fair Value Hedges, Net, Total Unearned ESOP [Member] Unearned Esop [Member] Equity impact from Unearned ESOP. Fair Value Hierarchy and NAV Fair Value Hierarchy and NAV [Axis] Amortization of operating leases Amortization Of Operating Leases Amortization of operating leases. Amortization of prior service credits Defined Benefit Plan, Amortization of Prior Service Cost (Credit) Equity investment securities: Equity Investment Securities [Abstract] Equity investment securities [Abstract] Amortization of mortgage servicing rights Amortization Accretion Of Mortgage Servicing Rights Amortization (accretion) of mortgage servicing rights. With no related allowance recorded [Abstract] With No Related Allowance Recorded [Abstract] With no related allowance recorded. Non-Voting Common Stock [Member] Nonvoting Common Stock [Member] Preferred stock to Non-Voting Common Stock Conversion Preferred Stock To Non Voting Common Stock Conversion Conversion of Preferred stock to Non-Voting common stock ESOP shares earned (in shares) Employee Stock Ownership Plan (ESOP), Shares Contributed to ESOP Increasing other liabilities Increase (Decrease) in Other Noncurrent Liabilities Community service activities Community Service Activities Community service activities Operating lease, option to extend lease term, description Lessee, Operating Lease, Option to Extend Dividend Income, Operating, Total Dividends Dividend Income, Operating Related Party Related Party [Domain] Reclassification adjustment for net gains included in net income Reclassification adjustment for net gains included in net income Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, before Tax Loans converted to term loans Loans Converted to Term Loans [Member] Loans Converted to Term Loans [Member] Total Fair Value Debt Securities, Available-for-Sale, Unrealized Loss Position Held To Maturity Securities Continuous Unrealized Loss Position Twelve Months Or Longer Accumulated Loss Percentage Held-to-maturity securities aggregate unrealized loss percentage Held To Maturity Securities Continuous Unrealized Loss Position Twelve Months Or Longer Accumulated Loss Percentage Held to maturity securities continuous unrealized loss position twelve months or longer accumulated loss percentage. Entity Filer Category Entity Filer Category Recorded Investment Impaired Financing Receivable, Recorded Investment Available-for-sale investment securities Proceeds From Sale Of Available For Sale Debt And Equity Securities Proceeds from sale of available for sale debt and equity securities. Purchase of marketable securities Payments to Acquire Marketable Securities Less: Allowance for credit losses Debt Securities, Held-to-Maturity, Allowance for Credit Loss Debt Securities, Held-to-Maturity, Allowance for Credit Loss, Ending Balance Debt Securities, Held-to-Maturity, Allowance for Credit Loss, Beginning Balance Debt Securities, Held-to-Maturity, Allowance for Credit Loss, Total Convertible preferred stock dividends Preferred Stock Dividends, Income Statement Impact Marketable equity securities Proceeds from Sale and Maturity of Marketable Securities Derivative Asset, Statement of Financial Position [Extensible Enumeration] COVID-19 Unusual or Infrequent Items, or Both, Disclosure [Text Block] Recorded Investment, Past Due [Line Items] Financing Receivable Recorded Investment Past Due [Line Items] Financing Receivable, Past Due [Line Items] Loans Loans and Leases Receivable, Net of Deferred Income Net unrealized (losses) gains on available-for-sale securities OCI, Debt Securities, Available-for-Sale, Gain (Loss), after Adjustment, before Tax Held-to-maturity Securities, debt maturities, Estimated Fair Value [Abstract] Debt Securities, Held-to-Maturity, Fair Value, Maturity [Abstract] Financing Receivable Recorded Investment [Line Items] Financing Receivable, Credit Quality Indicator [Line Items] Entity Current Reporting Status Entity Current Reporting Status Twelve months or more Fair Value Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value Asset Class Asset Class [Domain] Interest rate swap derivative fair value hedges Interest Rate Fair Value Hedge Liability at Fair Value Total noninterest expense Noninterest Expense Gain (Loss) on Disposition of Assets for Financial Service Operations [Abstract] Realized (gains) losses on sales, redemptions and calls of: Reevaluation of deferred tax asset valuation allowance Reevaluation Of Deferred Tax Asset Valuation Allowance1 Reevaluation of deferred tax asset valuation allowance Stockholders' Equity Attributable to Parent, Ending Balance Stockholders' Equity Attributable to Parent, Beginning Balance Total Pathfinder Bancorp, Inc. shareholders' equity Stockholders' Equity Attributable to Parent Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss, Total Total Unrealized Losses Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss Home Equity and Junior Liens [Member] Home Equity And Junior Liens [Member] Class of financing receivables related to home equity and junior liens financing receivables. Accumulated Other Comprehensive Loss [Member] AOCI Attributable to Parent [Member] Consumer Loan [Member] Credit Loss Status [Domain] Asset Class Asset Class [Axis] Number of Loans Number Of Loans Outstanding Number of loans outstanding. Entity Tax Identification Number Entity Tax Identification Number Amount attributable to Series A Non-Voting Common Stock Common stock Common Stock, Value, Issued Retained Earnings (Accumulated Deficit), Total Retained earnings Retained Earnings (Accumulated Deficit) Available-for-sale investment securities aggregate fair value that exceeded and amortized historical cost Available-for-sale investment securities aggregate fair value that exceeded and amortized historical cost Available-for-sale investment securities aggregate fair value that exceeded and amortized historical cost Equity Components Equity Components [Axis] Derivative, Gain (Loss) on Derivative, Net, Total Total loss in comprehensive income Derivative, Gain (Loss) on Derivative, Net Schedule of Cash Flow Hedges Schedule of Cash Flow Hedging Instruments, Statements of Financial Performance and Financial Position, Location [Table Text Block] Accounting Standards Update Accounting Standards Update [Domain] Non-Performing Loans Outstanding Non-Performing Loans Outstanding Held-to-maturity investment securities Debt Securities, Held-to-Maturity, Sold, Realized Gain (Loss), Excluding Other-than-temporary Impairment Troubled Debt Restructuring, Debtor, Subsequent Periods, Contingent Payments, Name Troubled Debt Restructuring, Debtor, Subsequent Periods, Contingent Payments, Name [Domain] Unrealized Gain and Loss on Securities Transferred to Held-to-Maturity [Member] Accumulated Net Unrealized Investment Income Loss Held To Maturity Securities [Member] Changes to accumulated comprehensive income resulting from the net income or the net loss in value of securities transferred to held to maturity. Leases [Abstract] Disaggregation Of Revenue [Table] Disaggregation of Revenue [Table] ACL related to pools Audit Command Language Related to Pool Audit Command Language Related to Pool Entity Emerging Growth Company Entity Emerging Growth Company Twelve months or more Unrealized Losses Available for sale securities unrealized aggregate loss Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss Interest cost Defined Benefit Plan, Interest Cost Interest Expense, Debt, Total Interest on subordinated loans Interest Expense, Debt Retirement plan net gains recognized in plan expenses Retirement plan net losses recognized in plan expenses Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, before Tax Fair Value Hedges Domain Fair Value Hedges Domain 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 Consolidation of membership interest in Fitzgibbons Consolidation Of Membership Interest In Subsidiary Refers to percentage of consolidation of interest own in Fitzgibbons. Proceeds from maturities and principal reductions of investment securities available-for-sale Proceeds from Maturities, Prepayments and Calls of Debt Securities, Available-for-Sale Retirement Plan Type Retirement Plan Type [Domain] Revolving Loans Converted To Term Loans [Member] Revolving Loans Converted To Term Loans [Member] Revolving Loans Converted To Term Loans [Member] Major Classification of Loans Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] Defined Benefit Plan, Plan Assets, Category [Domain] Schedule Of Financing Receivable Allowance For Credit Losses [Table] Financing Receivable, Allowance for Credit Loss [Table] Purchase of investment securities held-to-maturity Payments to Acquire Held-to-Maturity Securities Service cost Defined Benefit Plan, Service Cost Adoption of ASU 2016-13 Current Expected Credit Losses Adoption of ASU 2016-13 Current Expected Credit Losses Debt Securities Available For Sale [Table] Debt Securities, Available-for-Sale [Table] Consumer Loans [Member] Consumer Portfolio Segment [Member] Retirement Benefits [Abstract] Unsecured Consumer Loan Pool 2 [Member] Purchased Unsecured Consumer Loan Pool2 [Member] Purchased unsecured consumer loan pool 2 Member. 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 Document Transition Report Document Transition Report Number of Non-Performing Loans Number of Non-Performing Loans Other Consumer [Member] Other Consumer Financing Receivable [Member] Class of financing receivables related to other consumer financing receivables. Amortization of deferred financing from subordinated debt Amortization Of Financing Cost From Subordinated Debt Amortization of financing cost from subordinated debt. Term Loans By Origination Prior Year [Member] Term Loans By Origination Prior Year [Member] Term Loans By Origination Prior Year [Member] Investment under secured debt book value net. Investment Securities Book Value Investment securities, aggregate book value Hedging contracts rates Hedging contracts rates Hedging contracts rates Cash Basis Interest Income Recognized On Impaired Loans Cash Basis Interest Income Recognized On Impaired Loans Table [Text Block] Tabular disclosure of cash basis income recognized on impaired loan receivables. Changes in the Components of Accumulated Other Comprehensive Income (Loss), Net of Tax Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Financing Receivable Portfolio Segment Financing Receivable Portfolio Segment [Domain] Retirement Plans: Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment and Tax [Abstract] Type of Borrower [Axis] Accumulated Other Comprehensive Income (Loss), Net of Tax, Total Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax Entity Common Stock Shares Outstanding Entity Common Stock, Shares Outstanding Nonaccrual Loans Segregated by Class of Loan Financing Receivable, Nonaccrual [Table Text Block] Other comprehensive (loss) income, net of tax Other comprehensive income, net of tax Other Comprehensive Income (Loss), Net of Tax Private Equity Member Private Equity Funds [Member] Investment Securities Unrealized Loss Position Investment Securities Unrealized Loss Position Investment Securities Unrealized Loss Position Net income attributable to Pathfinder Bancorp, Inc. Net Income (Loss) Attributable to Parent Net (losses) income attributable to Pathfinder Bancorp Inc. Weighted Average [Member] Weighted Average [Member] Number of securities in unrealized loss positions Debt Securities, Available-for-Sale, Unrealized Loss Position, Number of Positions Nature Of Operations [Table] Nature Of Operations [Table] Disclosure of information about nature of operations related to entity. Loans Fair Value Hedge Liabilities Secured Consumer Installment Loans [Member] Purchased Secured Consumer Installment Loans [Member] Purchased secured consumer installment loans. Hedge transcations increased the net income hedge transcations increased the net income textblock hedge transcations increased the net income textblock Additional Paid in Capital [Member] Additional Paid-in Capital [Member] Unrealized holding gains arising during the period Unrealized Holding Losses Arising During The Period Unrealized holding losses arising during the period. Document Information [Line Items] Document Information [Line Items] Fair Value Inputs, Quantitative Information Fair Value Measurement Inputs and Valuation Techniques [Table Text Block] Loans Held For Sale [Member] Loans Held For Sale [Member] Loans held-for-sale. Entity Registrant Name Entity Registrant Name Advertising Advertising Expense Financing Receivable Impaired [Line Items] Financing Receivable, Impaired [Line Items] Earnings per Common Share Earnings Per Share [Text Block] Class of Stock Class of Stock [Axis] Total available-for-sale Held-to-maturity securities, at amortized cost (fair value of $189,622 and $181,491, respectively) Held-to-maturity securities, debt maturities, Amortized Cost Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss Collateralized Mortgage Obligations - Private Label [Member] Mortgage-Backed Securities, Issued by Private Enterprises [Member] Lessee Lease Description [Table] Lessee, Lease, Description [Table] Available for sale securities continuous unrealized loss position twelve months or more amortized historical cost basis Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or More Amortized Historical Cost Basis Available for sale securities continuous unrealized loss position twelve months or more amortized historical cost basis. Consolidated Statements of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] Gross Realized Gains (Losses) on Sale and Redemptions of Securities Realized Gain (Loss) on Investments [Table Text Block] Property, Plant and Equipment, Net, Total Premises and equipment, net Property, Plant and Equipment, Net Appraisal of Collateral - Appraisal Adjustments [Member] Valuation, Market Approach [Member] Increasing Decrease held-to-maturity securities Debt Securities, Held-to-Maturity, Allowance for Credit Loss, Period Increase (Decrease) Debt Securities, Held-to-Maturity, Allowance for Credit Loss, Period Increase (Decrease), Total Statement [Line Items] Statement [Line Items] This element represents number of securities issued in investment securities. Number Of Securities Number of securities Available-for-sale investment securities decline in fair value and amortized historical cost Available-for-sale investment securities decline in fair value and amortized historical cost Available-for-sale investment securities decline in fair value and amortized historical cost Unrealized holding gains (losses) on available-for-sale securities arising during the period OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment, Tax Unrealized holding gains (losses) on available-for-sale securities arising during the period Accounting Standards Update and Change in Accounting Principle [Abstract] Title of each class Title of 12(b) Security Other Securities: Other Securities Abstract Other securities abstract Ownership Ownership [Domain] Common Stock [Member] Common Stock [Member] Derivative Notional Amount Derivative, Notional Amount Net interest income after provision for loan losses Interest Income (Expense), after Provision for Loan Loss Foreclosed real estate, Carrying amount Other Real Estate, Foreclosed Assets, and Repossessed Assets Other Real Estate, Foreclosed Assets, and Repossessed Assets, Total OPERATING ACTIVITIES Net Cash Provided by (Used in) Operating Activities [Abstract] Equity Component Equity Component [Domain] Due after ten years Debt Securities, Held-to-Maturity, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 10 Income before income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Twelve months or more Unrealized Losses Held-to-maturity securities aggregate unrealized loss Held-to-maturity securities aggregate unrealized loss Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss Entity Address, State or Province Entity Address, State or Province Available-for-sale Securities, Amortized Cost Basis [Abstract] Available For Sale Securities Of Amortized Cost Basis [Abstract] Available for sale securities of amortized cost basis. Due in one year or less Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, Year One Troubled Debt Restructuring, Modified [Abstract] Troubled Debt Restructuring, Debtor, Current Period [Abstract] Credit Rating, Standard & Poor's [Axis] Change in cash and cash equivalents Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Comprehensive income (loss) Document Type Document Type Interest Interest Paid, Excluding Capitalized Interest, Operating Activities Allowance on purchased financial assets with credit deterioration Financing Receivable, Allowance for Credit Loss, Loan Purchased Schedule of Loans to Related Parties Schedule of Related Party Transactions [Table Text Block] Equity Investment [Member] Equity Securities, Investment Summary [Member] Amortization of net losses Defined Benefit Plan, Amortization of Gain (Loss) Receivables [Abstract] Entity Shell Company Entity Shell Company Interest Expense, Long-Term Debt, Total Interest on long-term borrowings Interest Expense, Long-Term Debt Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Commercial Borrower [Member] Commercial Borrower [Member] Gross Unrealized Gains, Equity investment securities Equity Securities Available For Sale Accumulated Gross Unrealized Gain Before Tax Equity securities, available-for-sale, accumulated gross unrealized gain, before tax. Unfunded Commitments [Member] Unfunded Commitments [Member] Total Mortgage Fee Income and Realized Gain on Sale of Loans and Foreclosed Real Estate [Member] Mortgage Banking [Member] Private equity securities Available-for-sale Securities, Equity investment securities Equity Securities, FV-NI, Current Class of Financing Receivable Class of Financing Receivable [Axis] Cash dividends paid on warrants Payments Of Dividends Warrants Payments of dividends warrants. Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Table] Fair Value, Recurring and Nonrecurring [Table] Doubtful [Member] Doubtful [Member] Cumulative effect of affiliate capital allocation. Cumulative Effect Of Affiliate Capital Allocation Cumulative effect of affiliate capital allocation Debt Securities [Member] Debt Securities [Member] Corporate Bond [Member] Corporate Bond Securities [Member] Interest rate swap derivative fair value hedges Interest Rate Fair Value Hedge Asset at Fair Value Maturity Range Maturity Period Of Acquired Loan Refers to maturity period of loan receivable acquired, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Common Stock - Financial Services Industry [Member] Common Stock - Financial Services Industry [Member] Common Stock - Financial Services Industry. Reclassification Out Of Accumulated Other Comprehensive Income [Table] Reclassification out of Accumulated Other Comprehensive Income [Table] Loss Contingencies [Line Items] Loss Contingencies [Line Items] Corporate Securities [Member] Corporate securities Minimum years of service to participate in the health and life insurance benefits as of January 1, 1995 Minimum Years Of Service To Participate In Health And Life Insurance Benefits Minimum years of service to participate in health and life insurance benefits. Demand Deposits, Savings, NOW and MMDA Deposits, Fair Value Disclosure Name of each exchange on which registered Security Exchange Name Revenue from Contract with Customer [Abstract] Term Loans By Origination Year 2019 [Member] Term Loans By Origination Year 2019 [Member] Term Loans By Origination Year 2019 [Member] Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] 1 Private-Label Asset - Backed Securities by Private-Issue Student Loan [Member] One Private Label Asset Backed Securities By Private Issue Student Loans [Member] One Private Label Asset Backed Securities By Private Issue Student Loans. Net cash flows from operating activities Net Cash Provided by (Used in) Operating Activities Total deposits Deposits Fair Value By Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping [Table] Supplemental Cash Flow Information Related to Leases Schedule Of Supplemental Cash Flow Information Related To Leases Table [Text Block] Schedule of supplemental cash flow information related to leases. Net loans Loans Held-for-sale, Fair Value Disclosure Loans Held-For-Sale [Member] Loan Held For Sale [Member] Loan held for sale. Commitments and Contingencies Disclosure [Abstract] Interest-earning deposits Interest-Bearing Deposits in Banks and Other Financial Institutions Held to maturity, gross unrealized gains Debt Securities, Held-to-Maturity, Accumulated Unrecognized Gain Operating lease cost Operating Lease, Cost 30-59 Days Past Due [Member] Financial Asset, 30 to 59 Days Past Due [Member] Service Fees [Member] Service Charges on Deposit Accounts [Member] Deposit Account [Member] Maturities of Lease Liabilities Lessee, Operating Lease, Liability, Maturity [Table Text Block] Total Fair Value Debt Securities, Held-to-Maturity, Unrealized Loss Position, Fair Value Schedule Of Accounts Notes Loans And Financing Receivable [Table] Schedule of Accounts, Notes, Loans and Financing Receivable [Table] Unpaid Principal Balance Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance Foreclosed real estate Foreclosed Real Estate Expense Summary of Purchased Loans Pools Summary Of Purchased Loans Pools Table [Text Block] Summary of Purchased Loans Pools Table Text Block. Debt securities, amortized cost balance Debt Securities Aggregate Amortized Cost Debt securities aggregate amortized cost. Membership interest own in Fitzgibbons through subsidiary Noncontrolling Interest, Ownership Percentage by Parent ATM Fees [Member] A T M Fees Deposit Account [Member] ATM fees deposit account. Schedule Of Defined Benefit Plans Disclosures [Table] Schedule of Defined Benefit Plans Disclosures [Table] Common Stock, Shares, Outstanding, Ending Balance Common Stock, Shares, Outstanding, Beginning Balance Common stock, shares outstanding (in shares) Common Stock, Shares, Outstanding Allowance For Loan Losses [Abstract] Allowance for loan losses. Number of loans Number of loan Financing Receivable, Modifications, Number of Contracts Level 2 [Member] Fair Value, Inputs, Level 2 [Member] Proceeds from Issuance of Long-Term Debt, Total Proceeds from long-term borrowings Proceeds from Issuance of Long-Term Debt Debt Securities, Available-for-Sale, Total Available-for-sale Securities, Debt investment securities Debt Securities, Available-for-Sale Financial Instrument Performance Status [Axis] INVESTING ACTIVITIES Net Cash Provided by (Used in) Investing Activities [Abstract] Federal funds sold and interest earning deposits Interest Income, Federal Funds Sold Commercial Lines of Credit [Member] Lines of Credit [Member] Lines Of Credit [Member] Class of financing receivables related to lines of credit receivables. Sub-total Aggregate Of Held To Maturity Securities Debt Maturities Fair Value This item represents the total of all debt securities grouped by maturity dates, at fair value, which are categorized as held-to-maturity. Real Estate [Member] Real Estate [Member] Held-to-maturity Securities [Abstract] Debt Securities, Held-to-Maturity, Fair Value to Amortized Cost, after Allowance for Credit Loss [Abstract] Pathfinder Risk Management Company Inc [Member] Pathfinder Risk Management Company Inc [Member] Pathfinder risk management company Inc. Common stock, shares issued (in shares) Common Stock, Shares, Issued Interest Rate Derivatives Derivative Instruments and Hedging Activities Disclosure [Text Block] Number of securities in unrealized loss positions Held To Maturity Number Of Securities In Unrealized Loss Positions This element represent the number of held to maturity securities in unrealized loss positions. Revolving Commercial Line of Credit 1 [Member] Purchased Commercial Line Of Credit One [Member] Purchased commercial line of credit one. Securities pledged to collateralize deposit Securities Pledged To Collateralize Deposit This element represent the fair value of securities pledged to collateralize municipal deposits. Held-to-maturity securities, at amortized cost fair value Held-to-maturity securities, at amortized cost fair value Held-to-maturity securities, at amortized cost fair value Minimum [Member] Minimum [Member] Term Loans By Origination Year 2023 [Member] Term Loans By Origination Year 2023 [Member] Term Loans By Origination Year 2023 [Member] Total Gain Loss On Sale Of Investments Excluding Realized Gain On Marketable Equity Security Gain loss on sale of investments excluding realized gain on marketable equity security. Marketable Securities, Total Marketable equity securities, at fair value Marketable Securities Reclassification adjustment for net gains included in net income Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax Reclassification adjustment for net (gains) losses included in net income Proceeds from sales, redemptions and calls of: Proceeds From Sale Of And Redemptions Of [Abstract] Proceeds from sales, redemptions and calls of: Directors, Executive Officers and Affiliates [Member] Directors Executive Officers And Affiliates [Member] Ranking officers of the entity, appointed to the position by the board of directors, people serving on the board of directors (who collectively have responsibility for governing the entity) and affiliates. 1 Private Label Asset - Backed Securities By Commercial Lease Contracts [Member] One Private Label Asset Backed Securities By Commercial Lease Contracts [Member] One private label asset backed securities by commercial lease contracts. RESTRICTED CASH Additional Cash Flow Elements and Supplemental Cash Flow Information [Abstract] Number of securities in unrealized loss positions, twelve months or more Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions Cumulative Basis Adjustments for Fair Value Hedges Schedule of Fair Value Hedging Instruments, Statements of Financial Performance and Financial Position, Location [Table Text Block] Accounting Standards Update Accounting Standards Update [Axis] Related Allowance Impaired Financing Receivable, Related Allowance Term Loans By Origination Year 2022 [Member] Term Loans By Origination Year 2022 [Member] Term Loans By Origination Year 2022 [Member] Shareholders' equity: Stockholders' Equity Attributable to Parent [Abstract] Maximum amount of loss due to credit risk Concentration Risk, Credit Risk, Financial Instrument, Maximum Exposure Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items] Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] Loans to Related Parties [Roll Forward] Loans and Leases Receivable, Related Parties [Roll Forward] Collateralized mortgage obligations - Private label Collateralized Mortgage Obligations Private Label Fair Value Disclosure This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents the amount shown on an entity's books for investments in collateralized mortgage obligations private label investment securities. Amortization of intangible assets Amortization of Intangible Assets 1 Private Label Asset - Backed Securities By Real Estate Lease Contracts [Member] One Private Label Asset Backed Securities By Real Estate Lease Contracts [Member] One private label asset backed securities by real estate lease contracts. Subsequent Event [Member] Troubled Debt Restructuring, Debtor, Subsequent Periods Troubled Debt Restructuring, Debtor, Subsequent Periods [Axis] Debt Instrument, Fair Value Disclosure, Total Borrowings Debt Instrument, Fair Value Disclosure Foreclosed Real Estate Real Estate Owned [Text Block] Corporate measured at NAV Corporate Measured at NAV Corporate Measured at NAV. Refers to distributions from affiliates. Distributions From Affiliates Distributions from affiliates Noninterest income: Noninterest Income [Abstract] Loss Contingencies [Table] Loss Contingencies [Table] Total unamortized premium Derivative Unamortized Premium Derivative unamortized premium. Total Beginning Balance Ending balance Financing Receivable, Allowance for Credit Loss Interest expense: Interest Expense [Abstract] Noncontrolling interest by subsidiary Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners Class of Financing Receivable Class of Financing Receivable [Domain] Guarantees Commitments Contingencies and Guarantees [Text Block] State and political subdivisions State And Political Subdivisions Fair Value Disclosure This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents the amount shown on an entity's books for investments in State and political subdivisions debt investment securities. Total [Abstract] Total [Abstract] Total. Retirement Plans [Member] Retirement Plans [Member] Accumulated Defined Benefit Plans Adjustment Including Portion Attributable to Noncontrolling Interest [Member] Unearned ESOP Unearned ESOP Shares CECL Adjustment [Member] CECL Adjustment [Member] Mutual funds Common Stock Financial Services Industry [Member] Mutual Funds Common Stock Financial Services Industry [Member] This category includes information about common stock financial services industry. Unsecured Consumer Loan Pool 6 [Member] Purchased Unsecured Consumer Loan Pool6 [Member] Purchased unsecured consumer loan pool 6. Fee Income [Member] Fee Income [Member] Fee income. Residential Real Estate Residential Real Estate [Member] Common stock, equity securities Amortized cost, equity securities Equity Securities, FV-NI, Cost Entity Central Index Key Entity Central Index Key Percentage of securities amortized Percentage Of Securities Amortized Of Total Securities Percentage of securities amortized of total securities. Insurance Services Revenue, Total Insurance agency revenue Insurance Services Revenue Deferred tax asset Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount Loans Receivable [Member] Loan Receivable [Member] Loan receivable. Total interest and dividend income Interest and Dividend Income, Operating Derivatives and hedging activities: Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification, before Tax [Abstract] Insufficient Funds Fees [Member] Insufficient Funds Fees Deposit Account [Member] Insufficient funds fees deposit account. Notional amount Derivative Contract Cash In Escrow Under Collateral Arrangements Derivative contract cash in escrow under collateral arrangements. Investments, Debt and Equity Securities [Abstract] Gross Unrealized Gains Available For Sale Debt And Equity Securities Accumulated Gross Unrealized Gain Before Tax Available for sale debt and equity securities accumulated gross unrealized gain before tax. Schedule Of Available For Sale Securities [Line Items] Debt Securities, Available-for-Sale [Line Items] Disaggregation Of Revenue [Line Items] Disaggregation of Revenue [Line Items] Net Asset Value [Member] Fair Value Measured at Net Asset Value Per Share [Member] Finance lease right-of-use assets Finance Lease, Right-of-Use Asset, after Accumulated Amortization Finance Lease, Right-of-Use Asset, after Accumulated Amortization, Total Subordinated debt Junior Subordinated Debenture Owed to Unconsolidated Subsidiary Trust, Total Junior Subordinated Debenture Owed to Unconsolidated Subsidiary Trust Net unrealized gain on retirement plans Net unrealized gain (loss) on retirement plans Net unrealized gain (loss) on retirement plans Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, before Tax Net deferred loan fees Net deferred loan fees Loans and Leases Receivable, Deferred Income Total investment securities, amortized cost basis Available For Sale Debt And Equity Securities Amortized Cost Available for sale debt and equity securities amortized cost. Measurement Frequency Measurement Frequency [Axis] Less than twelve months Unrealized Losses Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss Available-for-sale securities, debt maturities, Estimated Fair Value [Abstract] Debt Securities, Available-for-Sale, Fair Value, Fiscal Year Maturity [Abstract] Operating Lease, Lease Income, Total Lease rental income Operating Lease, Lease Income General and Administrative Expense, Total Audits and exams General and Administrative Expense Aggregate fair value Aggregate Fair Value Aggregate fair value. Total unamortized cap Derivative Unamortized Cap Derivative unamortized cap. Measurement Input Type Measurement Input Type [Domain] Organization, Consolidation and Presentation of Financial Statements [Abstract] Document Information [Table] Document Information [Table] Financing cash flows from finance leases Finance Lease, Principal Payments Due in one year or less Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss, Maturity, Allocated and Single Maturity Date, Year One Gain (Loss) on Sales of Loans, Net, Total Loans Gain (Loss) on Sales of Loans, Net Nonrecurring Basis [Member] Fair Value, Nonrecurring [Member] Number of securities amortized Number Of Securities Amortized Number of securities amortized. Change in market value common stock investment Ioss Change in Market Value Common Stock Investment Loss Change in market value common stock investment Ioss. Revolving Commercial Line of Credit 2 [Member] Purchased Commercial Line Of Credit Two [Member] Purchased commercial line of credit two. Adjustments to reconcile net income to net cash flows from operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Retained Earnings [Member] Retained Earnings [Member] Debt Instrument, Unamortized Discount (Premium), Net, Total Unamortized Premium/ (Discount) Debt Instrument, Unamortized Discount (Premium), Net Internal Credit Assessment Internal Credit Assessment [Axis] Total Unrealized Losses Debt Securities, Held-to-Maturity, Unrealized Loss Position, Accumulated Loss Provision for credit losses Provision for Other Credit Losses Measurement Input Type Measurement Input Type [Axis] Gain (Loss) on Disposition of Property Plant Equipment, Total Net gains on sale of premises and equipment Gain (Loss) on Disposition of Property Plant Equipment Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Paycheck Protection Program loans [Member] Paycheck Protection Program Loans [Member] Paycheck Protection Program loans Member. Allowance for Loan Losses Allowance for Credit Losses [Text Block] Additional Paid in Capital, Total Additional paid in capital Additional Paid in Capital Adoption of New Accounting Standard Cumulative Effect Of Adoption of New Accounting Standard Cumulative Effect Of Adoption of New Accounting Standard Entity Interactive Data Current Entity Interactive Data Current Financial assets: Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] Financial Asset, Aging Financial Asset, Aging [Domain] Commercial Real Estate Commercial Real Estate [Member] Asset Pledged as Collateral [Member] External Credit Rating, Standard & Poor's [Domain] Related Party Transactions Related Party Transactions Disclosure [Text Block] Finance Leases: Finance Leases [Abstract] Finance leases. Borrowed Funds Cash Flow Hedge Derivative Instrument Liabilities at Fair Value Due after ten years Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year 10 Undistributed Earnings (Loss) Allocated to Participating Securities, Basic, Total Undistributed earnings allocated to participating securities Undistributed Earnings (Loss) Allocated to Participating Securities, Basic Related Party Transactions [Abstract] Appraisal of Collateral - Cost to Sell [Member] Valuation, Cost Approach [Member] Reclassification out of Accumulated Other Comprehensive Income Reclassification out of Accumulated Other Comprehensive Income [Domain] Series A Nonvoting Common Stock [Member] Series A Non Voting Common Stock [Member] Series A non voting common stock [Member] Loan Servicing Fees [Member] Bank Servicing [Member] Proceeds from (Payments to) Noncontrolling Interests, Total Change in noncontrolling interest, net Proceeds from (Payments to) Noncontrolling Interests With an allowance recorded [Abstract] With Allowance Recorded [Abstract] With allowance recorded. Number of portfolio segment Number Of Portfolio Segment Refers to number of portfolio segment. Available for sale securities aggregate market value Twelve months or more Fair Value Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer Local Phone Number Local Phone Number Purchase of investment securities available-for-sale Payments To Acquire Available For Sale Debt And Equity Securities Payments to acquire available for sale debt and equity securities. Number of securities in unrealized loss positions, less than twelve months Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions Fair Value of Assets on Recurring Basis Segregated by Level of Valuation Inputs Fair Value, Assets Measured on Recurring Basis [Table Text Block] Noninterest-Bearing Deposit Liabilities, Total Noninterest-bearing Noninterest-Bearing Deposit Liabilities Amount of designated hedging item Derivative, Amount of Hedged Item Calculations of Basic and Diluted Earnings per Share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Amortization of deferred loan fees Amortization Accretion Of Deferred Loan Costs Amortization accretion of deferred loan costs. Payments for (Proceeds from) Loans and Leases, Total Net change in loans Payments for (Proceeds from) Loans and Leases Net Income (Loss) Attributable to Noncontrolling Interest, Total Net income attributable to noncontrolling interest Net Income (Loss) Attributable to Noncontrolling Interest Summary of Impaired Loan Information by Portfolio Class Impaired Financing Receivables [Table Text Block] Nonaccrual status loans Financing Receivable, Nonaccrual Interest Rate Swap [Member] Interest Rate Swap [Member] Collateralized mortgage obligations - US agency Collateralized Mortgage Obligations Agency Fair Value Disclosure This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents the amount shown on an entity's books for investments in collateralized mortgage obligations agencies debt investment securities. Municipal Securities [Member] Municipal Bonds [Member] 2027 Lessee, Operating Lease, Liability, Payments, Due in Rolling Year Four Operating lease, option to extend lease term Lessee, Operating Lease, Existence of Option to Extend [true false] Summary of Noninterest Income Disaggregation of Revenue [Table Text Block] Recoveries Financing Receivable, Allowance for Credit Loss, Recovery Thereafter Lessee, Operating Lease, Liability, Payments, Due after Rolling Year Five FitzGibbons Agency LLC [Member] Fitz Gibbons Agency L L C [Member] FitzGibbons agency LLC. Net change in demand deposits, NOW accounts, savings accounts, money management deposit accounts, MMDA accounts and escrow deposits Increase (Decrease) in Demand Deposits Other comprehensive (loss) income, before tax Other Comprehensive Income (Loss), before Tax Other Charges, Commissions & Fees [Member] Financial Service, Other [Member] Document Fiscal Year Focus Document Fiscal Year Focus Intangible Assets, Net (Excluding Goodwill), Total Intangible assets, net Intangible Assets, Net (Excluding Goodwill) ESOP shares earned Esop Shares Earned Employee stock ownership plan shares earned during the period. Other miscellaneous income Noninterest Income, Other Allowance For Loan Losses On Basis Of Calculation Methodology Abstract Allowance For Loan Losses On Basis Of Calculation Methodology [Abstract] Allowance for Loan Losses on Basis of Calculation Methodology [Abstract] Financing Receivable Portfolio Segment Financing Receivable Portfolio Segment [Axis] Net change in accrued interest receivable Increase (Decrease) in Accrued Interest Receivable, Net Earnings Per Share, Basic, Total Earnings per common share- basic Earnings Per Share, Basic Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value [Abstract] Debt Securities, Held-to-Maturity, Unrealized Loss Position, Fair Value [Abstract] Income taxes Income Taxes Paid Dividends per common share (Voting and Series A Non-Voting) Common Stock, Dividends, Per Share, Declared ASSETS: Assets [Abstract] Investments, Fair Value Disclosure, Total Total available-for-sale securities Investments, Fair Value Disclosure Held-to-maturity Securities, Continuous Unrealized Loss Position, Accumulated Loss [Abstract] Debt Securities, Held-to-Maturity, Unrealized Loss Position, Accumulated Loss [Abstract] Nonrecurring basis [Abstract] Nonrecurring Basis [Abstract] Nonrecurring basis [Abstract] Unrealized Loss on Available for Sale Securities Available-for-sale securities AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-Sale, Including Noncontrolling Interest [Member] Schedule of aggregate pass rating and the classified ratings Schedule of aggregate pass rating and the classified ratings [Table Text Block] Schedule of aggregate pass rating and the classified ratings [Table Text Block] Available-for-sale investment securities aggregate fair value and amortized historical cost percentage Available-for-sale investment securities aggregate fair value and amortized historical cost percentage Available-for-sale investment securities aggregate fair value and amortized historical cost percentage 2026 Lessee, Operating Lease, Liability, Payments, Due in Rolling Year Three Number of securities in unrealized loss positions, less than twelve months Held To Maturity Number Of Securities In Unrealized Loss Positions Less Than Twelve Months This element represent the number of held to maturity securities in unrealized loss positions for less than twelve months. Total minimum lease payments Lessee Operating Lease Liability Payments Due Including Undiscounted Excess Amount Lessee operating lease liability payments due including undiscounted excess amount. Financial Instrument Financial Instrument [Axis] Term Loans By Origination Year 2021 [Member] Term Loans By Origination Year 2021 [Member] Term Loans By Origination Year 2021 [Member] Other expenses Other Noninterest Expense Available For Sale Securities Continuous Unrealized Loss Position Greater Than Twelve Months Amortized Historical Cost Basis Available For Sale Securities Continuous Unrealized Loss Position Greater Than Twelve Months Amortized Historical Cost Basis Provision for credit losses Provisions (credits) Provision for Loan and Lease Losses Residential Construction Mortgage [Member] Residential Mortgage Construction [Member] Residential mortgage construction. LIABILITIES AND SHAREHOLDERS' EQUITY: Liabilities and Equity [Abstract] Salaries and employee benefits Salaries and employee benefits Salary and Wage, NonOfficer, Excluding Cost of Good and Service Sold Total Residential mortgage loans pledged to FHLBNY as blanket collateral Loans receivable, net Financing Receivable, after Allowance for Credit Loss Accounts Notes And Loans Receivable [Line Items] Accounts, Notes, Loans and Financing Receivable [Line Items] Financing Receivable, before Allowance for Credit Loss, Total Total Past Due Financing Receivable, before Allowance for Credit Loss Principal payments and related party removals Loans and Leases Receivable, Related Parties, Proceeds Non Government Issued Backed Securities [Member] Non Government Issued Backed Securities [Member] Non-Government Issued Backed Securities [Member] Antidilutive Securities, Name Antidilutive Securities, Name [Domain] Internal Credit Assessment Internal Credit Assessment [Domain] Available for Sale Securities [Member] Available-for-Sale Securities [Member] Valuation Approach and Technique Valuation Approach and Technique [Axis] Preferred Stock [Member] Preferred Stock [Member] Net income Net income attributable to noncontrolling interest and Pathfinder Bancorp, Inc. Net Income Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Notes, Loans and Financing Receivable, Net [Abstract] Financing Receivable, after Allowance for Credit Loss [Abstract] Dividends, Common Stock, Total Common stock dividends declared Dividends, Common Stock Available-for-sale securities, debt maturities, fair value, totals Available For Sale Securities Debt Maturities Fair Value Net Available for sale securities debt maturities fair value net. Other comprehensive (loss) income before reclassifications Other Comprehensive Income (Loss), before Reclassifications, Net of Tax Specifically reserved Financing Receivable Allowance For Credit Losses Specifically Reserved Amount of financing receivables in allowance to specifically reserved. Total noninterest income Noninterest Income Increase (Decrease) in Time Deposits, Total Net change in time deposits Increase (Decrease) in Time Deposits Financial liabilities: Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract] Unrealized holding (losses) gains on available-for-sale securities: OCI, Debt Securities, Available-for-Sale, Gain (Loss), after Adjustment, before Tax [Abstract] 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 Total Debt Securities Debt Securities, Total Less than twelve months Unrealized Losses Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss Fair Value Hierarchy and NAV Fair Value Hierarchy and NAV [Domain] Finance Lease, Liability, Statement of Financial Position [Extensible Enumeration] Finance Lease, Liability, Statement of Financial Position [Extensible Enumeration] Weighted Average Remaining Lease Term: Weighted Average Remaining Lease Term [Abstract] Weighted average remaining lease term. Unrealized gains on derivatives and hedging arising during the period Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, Tax Unrealized gains on derivatives and hedging arising during the period Measurement Frequency Measurement Frequency [Domain] Weighted Average Discount Rate: Weighted Average Discount Rate [Abstract] Weighted average discount rate. Related Party Transaction [Line Items] Related Party Transaction [Line Items] Lease, Cost [Abstract] Entity Entity [Domain] Held-to-Maturity Securities [Member] Interest Rate Cap [Member] Cover [Abstract] Non-Voting common stock dividends declared Dividends Non Voting Common Stock DividendsNonVotingCommonStock Held to maturity securities continuous unrealized loss position greater than twelve months amortized historical cost basis Held to maturity securities continuous unrealized loss position greater than twelve months amortized historical cost basis Held To Maturity Securities Continuous Unrealized Loss Position Greater Than Twelve Months Amortized Historical Cost Basis Held to maturity securities continuous unrealized loss position greater than twelve months amortized historical cost basis. Product and Service Product and Service [Domain] Loans receivable Member Loans Receivable [Member] Measurement Basis Measurement Basis [Axis] Due in one year or less Debt Securities, Held-to-Maturity, Fair Value, Maturity, Allocated and Single Maturity Date, Year One Sub-total Aggregate Of Available For Sale Securities Debt Maturities Fair Value This item represents the total of all debt securities grouped by maturity dates at fair value. Financial Services Sector [Member] Tax Effect Allocated to Each Component of Other Comprehensive Income (Loss) Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent, Parenthetical Disclosure [Abstract] Maximum [Member] Maximum [Member] Held-to-maturity Securities, debt maturities, amortized cost [Abstract] Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss, Maturity [Abstract] Schedule of Available-for-sale Securities and Held-to-Maturity Securities [Line Items] Schedule Of Available For Sale Securities And Held To Maturity Securities [Line Items] Schedule of available for sale securities and held to maturity securities. Commercial Loans [Member] Commercial Portfolio Segment [Member] Net cash outflows from investing activities Net Cash Provided by (Used in) Investing Activities Warrant dividends Warrant Dividends Income Statement Impact Warrant dividends, income statement impact. Equity Securities, FV-NI, Gain (Loss), Total Gains on marketable equity securities Equity Securities, FV-NI, Gain (Loss) Schedule Of Antidilutive Securities Excluded From Computation Of Earnings Per Share [Table] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] 1-4 Family First Lien Residential Mortgages [Member] Family First Lien Residential Mortgages1 To4 [Member] Class of financing receivables related to 1-4 family first-lien residential mortgages. Amortized Cost and Estimated Fair Value of Debt Investments by Contractual Maturity Investments Classified by Contractual Maturity Date [Table Text Block] Level 3 [Member] Fair Value, Inputs, Level 3 [Member] Restricted stock awards/units (in shares) Stock Issued During Period, Shares, Restricted Stock Award, Gross Debit Card Interchange Fees [Member] Debit Card [Member] Financial Asset, Aging Financial Asset, Aging [Axis] Loan Restructuring Modification [Axis] Warrant dividends declared Dividends Warrant Dividends Warrant. AFS Investments [Member] AFS investments [Member] AFS investments [Member] Fair Value Receivable (Payable) at Quarter End [Member] Fair Value Receivable (Payable) at Quarter End Member Fair Value Receivable (Payable) at Quarter End Member Stock options exercised Stock Issued During Period, Value, Stock Options Exercised Derivative, Loss, Statement of Income or Comprehensive Income [Extensible Enumeration] Additional provision for loan losses Financing Receivable, Credit Loss, Expense (Reversal) Gross Unrealized Losses, Equity investment securities Equity Securities Available For Sale Accumulated Gross Unrealized Loss Before Tax Equity securities, available-for-sale, accumulated gross unrealized loss, before tax. Insurance Agency [Member] Insurance Commissions [Member] Insurance Commissions [Member] Insurance commissions. BBB or equivalent Standard & Poor's, BBB Rating [Member] Investments Fair Value Hedge Assets Fair value inputs, discount rate Alternative Investment, Measurement Input Average Recorded Investment In Impaired Loans Average Recorded Investment In Impaired Loans Table [Text Block] Tabular disclosure of average recorded investment related to impaired financing receivables. Common stock, shares authorized (in shares) Common Stock, Shares Authorized Derivative Assets (Liabilities), at Fair Value, Net, Total Derivative Assets (Liabilities), at Fair Value, Net Net Derivative Assets Trading Symbol Trading Symbol Ownership Ownership [Axis] Schedule of Amounts Reclassified Out of Each Component of AOCI Reclassification out of Accumulated Other Comprehensive Income [Table Text Block] Schedule Of Impaired Financing Receivable [Table] Schedule of Impaired Financing Receivable [Table] FDIC assessments Federal Deposit Insurance Corporation Premium Expense Amortized cost of debt securities categorized as held-to-maturity aggregated by credit quality Financing Receivable Credit Quality Indicators [Table Text Block] Troubled Debt Restructurings on Financing Receivables Financing Receivable, Troubled Debt Restructuring [Table Text Block] Loans held-for-sale Financing Receivable, Held-for-Sale Other Liabilities, Total Other liabilities Other Liabilities Subsequent Event Type [Axis] Fair Value Hedging [Member] Fair Value Hedging [Member] Cash and due from banks Cash and Due from Banks, Total Cash and Due from Banks Collateral deposits for hedge position included in cash and due from banks Collateral Deposits For Hedge Position Included In Cash And Due From Banks Collateral deposits for hedge position included in cash and due from banks. Allowance for credit losses on investment securities classified as held-to-maturity Financing Receivable Credit Quality Indicator [Table Text Block] Financing Receivable Credit Quality Indicator [Table Text Block] Interest rate swap derivative cash flow hedges Interest Rate Cash Flow Hedge Liability Increase Decrease At Fair Value Interest rate cash flow hedge liability increase decrease at fair value. Balance Sheet Location Balance Sheet Location [Axis] 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 Comprehensive Income (Loss), Net of Tax, Attributable to Parent Comprehensive income (loss) attributable to Pathfinder Bancorp, Inc. Professional and other services Professional Fees Gross Unrealized Losses, Debt investment securities Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax Accumulated Other Comprehensive Income Loss [Line Items] Accumulated Other Comprehensive Income (Loss) [Line Items] Schedule Of Related Party Transactions By Related Party [Table] Schedule of Related Party Transactions, by Related Party [Table] Cash Flow Hedging [Member] Cash Flow Hedging [Member] Special Mention [Member] Special Mention [Member] AAA or equivalent Standard & Poor's, AAA Rating [Member] Debt and Equity Securities, Gain (Loss), Total Debt and Equity Securities, Gain (Loss) Net gains on sales and redemptions of investment securities Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Cumulative Amount of Fair Value Hedging Adjustment Included in The Carrying Amount of the Hedged Assets Hedged Asset, Fair Value Hedge, Cumulative Increase (Decrease) Realized gains on investments Realized Gains On Investments Sold The net realized gain on investments sold during the period, not including gains (losses) on securities separately or otherwise categorized as trading, available-for-sale, or held-to-maturity, which, for cash flow reporting, is a component of proceeds from investing activities. Current [Member] Financial Asset, Not Past Due [Member] Unsecured Consumer Installment Loans Pool 3 [Member] Purchased Unsecured Consumer Installment Loans Pool3 [Member] Purchased unsecured consumer installment loans pool 3. Schedule of Changes in the Allowance for Loan Losses Financing Receivable, Allowance for Credit Loss [Table Text Block] Deposit Related Fees [Member] Deposit Related Fees Deposit Account [Member] Deposit related fees deposit account. 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 Defined Benefit Plan Disclosure [Line Items] Defined Benefit Plan Disclosure [Line Items] Derivative Instrument Derivative Instrument [Axis] Estimated Fair Values [Member] Total Fair Value [Member] Estimate of Fair Value Measurement [Member] Cash paid for amount included in the measurement of lease liabilities: Cash Paid For Amounts Included In Measurement Of Lease Liabilities [Abstract] Cash paid for amounts included in the measurement of lease liabilities. Increase (Decrease) in Fair Value of Interest Rate Fair Value Hedging Instruments Increase (Decrease) in Fair Value of Interest Rate Fair Value Hedging Instruments Anti-dilutive stock options (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Cash and cash equivalents Cash and Cash Equivalents, Fair Value Disclosure Age Analysis of Past Due Loans Segregated by Portfolio Segment and Class of Loans Financing Receivable, Past Due [Table Text Block] Expected return on plan assets Defined Benefit Plan, Expected Return (Loss) on Plan Assets