Document And Entity Information
Statistical Measurement [Axis]
Note To Financial Statement Details Textual
Significant Accounting Policies
Income Tax Expense (Benefit)
Note 2 - Business Combinations
ecd_NonRule10b51ArrTrmntdFlag
Non-Rule 10b5-1 Arrangement Terminated [Flag]
Note 3 - Securities
ecd_NonRule10b51ArrAdoptedFlag
Non-Rule 10b5-1 Arrangement Adopted [Flag]
Note 4 - Loans
Trading Arrangements, by Individual [Table]
Note 5 - Loan Restructurings
Debit Card [Member]
Material Terms of Trading Arrangement [Text Block]
Note 6 - Credit Quality Indicators
Deposit Account [Member]
Note 7 - Revenue From Contracts With Customers
Note 8 - Fair Value
Financial Instrument [Axis]
Investment in Debt and Equity Securities and Other Trading Assets [Text Block]
Note 9 - Goodwill and Intangible Assets
Note 10 - Leases
Comprehensive Income, Policy [Policy Text Block]
Note 11 - Derivative Financial Instruments
us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax
Securities available for sale, unrealized losses
Minimum [Member]
Note 12 - Earnings Per Share
Securities available for sale, unrealized gains
Statistical Measurement [Domain]
Note 13 - Stock Based Compensation
Maximum [Member]
Note 14 - Other Comprehensive Income (Loss)
Note 15 - Regulatory Capital Matters
Note 16 - Segment Information
us-gaap_BusinessAcquisitionSharePrice
Business Combination, Price Per Share (in dollars per share)
Note 18 - Long-Term Borrowings
Note 2 - Business Combinations - Schedule of Business Combination, Recognized Asset Acquired and Liability Assumed (Details)
Note 2 - Business Combination - Pro Forma Information (Details)
Note 3 - Securities Available for Sale - Schedule of Available for Sale Securities (Details)
Note 3 - Securities Available for Sale - Schedule of Security Gains and Losses (Details)
Note 3 - Securities Available for Sale - Schedule of Expected Maturity (Details)
Note 3 - Securities Available for Sale - Schedule of Securities in Unrealized Loss Positions (Details)
us-gaap_FederalHomeLoanBankAdvancesInterestRate
Federal Home Loan Bank, Advances, Interest Rate
Note 4 - Loans - Schedule of Loans (Details)
Recoveries
Other investments
Note 4 - Loans - Schedule of Allowance For Credit Loss (Details)
Note 4 - Loans - Schedule of Nonaccrual Loans (Details)
Note 4 - Loans - Schedule of Collateral Dependent Loans (Details)
Note 4 - Loans - Schedule of Past Due Loans (Details)
Note 5 - Loan Restructurings - Schedule of Loan Modifications (Details)
Note 5 - Loan Restructurings - Schedule of Performance of Loans Modified (Details)
Note 5 - Loan Restructurings - Schedule of Modified Loans With Subsequent Default (Details)
Note 6 - Credit Quality Indicators - Schedule of Risk Categories and Origination (Details)
Note 6 - Credit Quality Indicators - Purchased Loans (Details)
Note 6 - Credit Quality Information - Schedule of Loans Held for Sale (Details)
Note 7 - Revenue From Contracts With Customers - Schedule of Noninterest Revenue (Details)
Note 8 - Fair Value - Schedule of Financial Assets and Liabilities at Fair Value Measured on Recurring Basis (Details)
Note 8 - Fair Value - Reconciliation of Level 3 Inputs Measured on Recurring Basis (Details)
Note 8 - Fair Value - Reconciliation of Level 3 Inputs Measured on Recurring Basis (Details) (Parentheticals)
Debt Securities, Available-for-Sale [Table]
Note 8 - Fair Value - Schedule of Financial Assets at Fair Value Measured on Nonrecurring Basis (Details)
Note 8 - Fair Value - Nonrecurring Measurements Valuation Techniques (Details)
Note 8 - Fair Value - Schedule of Assets and Liabilities Not Measured at Fair Value (Details)
Note 9 - Goodwill and Intangible Assets - Schedule of Intangible Assets (Details)
Note 9 - Goodwill and Intangible Assets - Schedule of Future Amortization Expense (Details)
Note 10 - Leases - Maturities of Lease Liabilities (Details)
Note 11 - Derivative Financial Instruments - Schedule of Derivative Instruments (Details)
us-gaap_Dividends
Dividends paid
Note 11 - Derivative Financial Instruments - Schedule of Derivative Gain (Loss) (Details)
Note 11 - Derivative Financial Instruments - Schedule of Derivative Instruments Financial Position (Details)
Salaries and employee benefits
Payroll expenses
Note 12 - Earnings Per Share - Schedule of Earnings Per Share (Details)
Note 13 - Stock Based Compensation - Restricted Stock Unit Activity (Details)
Note 14 - Other Comprehensive Income (Loss) - Schedule of Accumulated Other Comprehensive Income (Loss) (Details)
Note 15 - Regulatory Capital Matters - Schedule of Regulatory Capital (Details)
Note 16 - Segment Information - Reconciliation of Segment Assets (Details)
Note 16 - Segment Information - Schedule of Segment Information (Details)
Note 18 - Long-Term Borrowings - Schedule of Long-term Debt (Details)
Notes To Financial Statements
Notes To Financial Statements [Abstract]
Financial Instruments [Domain]
us-gaap_LesseeOperatingLeaseRemainingLeaseTerm
Lessee, Operating Lease, Remaining Lease Term (Year)
Weighted Average [Member]
us-gaap_IncreaseDecreaseInNotesReceivables
Increase (Decrease) in Notes Receivables
Segment Reporting [Text Block]
Securities available for sale, fair value, more than 12 months
Securities available for sale, fair value, less than 12 months
Award Type [Axis]
Segment Reporting [Table Text Block]
Adjustments to reconcile net income to net cash from operating activities:
Plan Name [Axis]
Banking Regulation, Regulatory Capital Requirement, Compliance [Table]
us-gaap_Liabilities
TOTAL LIABILITIES
Liabilities [Abstract]
Plan Name [Domain]
Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations [Table Text Block]
Segment Reporting, Reconciliation of Asset by Segment to Consolidated [Table Text Block]
us-gaap_AllocatedShareBasedCompensationExpense
Share-Based Payment Arrangement, Expense
us-gaap_LiabilitiesAndStockholdersEquity
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY
Consolidation Items [Axis]
Segment Reporting [Table]
fmnb_BusinessAcquisitionEquityInterestsExchangeRatio
Business Acquisition, Equity Interests, Exchange Ratio
The exchange ratio for equity interests in a business combination.
Stock compensation expense
Subsequent Event [Member]
LIABILITIES AND STOCKHOLDERS' EQUITY
Consolidation Items [Domain]
Lessee, Lease, Description [Table]
Financing Receivable, Purchased With Credit Deterioration [Table Text Block]
The entire tabular disclosure of financing receivables purchased with credit deterioration.
Share-Based Payment Arrangement [Text Block]
Net change in short-term borrowings
Portion at Fair Value Measurement [Member]
Reported Value Measurement [Member]
Fair Value, by Balance Sheet Grouping [Table]
us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect
NET CHANGE IN CASH AND CASH EQUIVALENTS
Cash and cash equivalents
us-gaap_CashAndCashEquivalentsFairValueDisclosure
AOCI, Derivative Qualifying as Hedge, Excluded Component, Parent [Member]
Estimate of Fair Value Measurement [Member]
Dividends per share (in dollars per share)
Mortgage servicing rights
Common equity tier 1, actual, ratio
Risk based capital, well capitalized, ratio
New Accounting Pronouncements, Policy [Policy Text Block]
Risk based capital, actual, ratio
us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations
Beginning cash and cash equivalents
Ending cash and cash equivalents
Risk based capital, capital adequacy, ratio
Banking Regulation, Total Risk-Based Capital Ratio, Capital Adequacy, Minimum
Antidilutive Securities, Name [Domain]
Tier 1 leverage, actual, ratio
Tier 1 risk based capital, capital adequacy, ratio
Banking Regulation, Tier 1 Risk-Based Capital Ratio, Capital Adequacy, Minimum
Tier 1 leverage, capital adequacy, ratio
Banking Regulation, Tier 1 Leverage Capital Ratio, Capital Adequacy, Minimum
us-gaap_DebtInstrumentRepurchaseAmount
Debt Instrument, Repurchase Amount
Statement [Table]
Tier 1 leverage, well capitalized, ratio
Common equity tier 1, capital adequacy, ratio
Banking Regulation, Common Equity Tier 1 Risk-Based Capital Ratio, Capital Adequacy, Minimum
Common equity tier 1, well capitalized, ratio
Tier 1 risk based capital, well capitalized, ratio
Tier 1 risk based capital, actual, ratio
us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss
Securities available for sale, accumulated loss
Debt Securities, Available-for-Sale, Unrealized Loss Position, Fair Value [Table Text Block]
Loans, fair value
Loans receivable, fair value
Loans, net
us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Debt Instrument, Basis Spread on Variable Rate
Lease liabilities arising from obtaining right-of-use assets
Securities available for sale, fair value
us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPosition
us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Line of Credit Facility, Maximum Borrowing Capacity
Initial allowance on purchased seasoned loans
Allowance for credit losses of PSLs
Line of Credit Facility, Lender [Domain]
Derivative liabilities
Derivative Liability
us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionNumberOfPositions
Debt Securities, Available-for-Sale, Unrealized Loss Position, Number of Positions
us-gaap_BankingRegulationCapitalConservationBufferCapitalConservedMinimum
Banking Regulation, Capital Conservation Buffer, Capital Conserved, Minimum
Financing Receivable, Allowance for Credit Loss [Table Text Block]
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
Beginning balance - non-vested shares (in shares)
Ending balance - non-vested shares (in shares)
Lender Name [Axis]
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
Balance, weighted average grant date fair value (in dollars per share)
Balance, weighted average grant date fair value (in dollars per share)
Financing Receivable, Past Due [Table Text Block]
Granted (in shares)
Granted, weighted average grant date fair value (in dollars per share)
Long-Term Debt, Type [Axis]
us-gaap_EquitySecuritiesFvNiRealizedGainLoss
Realized losses (gains) on equity securities
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod
Forfeited (in shares)
Financing Receivable Credit Quality Indicators [Table Text Block]
Financing Receivable, Modified [Table Text Block]
Product and Service [Domain]
Product and Service [Axis]
Consolidated Entities [Axis]
Vested, weighted average grant date fair value (in dollars per share)
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value (in dollars per share)
Consolidated Entities [Domain]
us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period (in shares)
Vested (in shares)
Collateralized Mortgage Obligations [Member]
us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue
Total Payments
Loans, held for sale
us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent
Operating Lease, Weighted Average Discount Rate, Percent
2027
us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths
Interest income - loans including fees
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized (in shares)
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant (in shares)
us-gaap_ProceedsFromIssuanceOfDebt
Proceeds from Issuance of Debt
us-gaap_OperatingLeaseExpense
Operating Lease, Expense
Gain (Loss) on Securities [Table Text Block]
2026 (9 months)
us-gaap_LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear
Lessee, Operating Lease, Liability, to be Paid, Maturity [Table Text Block]
Assets [Abstract]
2029
us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree
Measurement Frequency [Axis]
2028
us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo
Statement [Line Items]
2030
us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour
Fair Value Hierarchy and NAV [Axis]
Common stock, shares issued (in shares)
Common stock, shares outstanding (in shares)
Common Stock, Shares, Outstanding (in shares)
Award Type [Domain]
Common stock, shares authorized (in shares)
Common Stock, Shares Authorized (in shares)
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]
Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table]
Common Stock, no par value; 75,000,000 and 50,000,000 shares authorized in 2026 and 2025, respectively; 60,772,208 and 39,321,709 shares issued, respectively; 59,191,712 and 37,653,183 shares outstanding, respectively
us-gaap_AmortizationMethodQualifiedAffordableHousingProjectInvestmentsAmortization
Investment Program, Proportional Amortization Method, Applied, Amortization Expense
2028
2029
Tax credit investments
Investment, Proportional Amortization Method, Elected, Amount
2027
Business Combination, Recognized Asset Acquired and Liability Assumed [Table Text Block]
us-gaap_QualifiedAffordableHousingProjectInvestmentsCommitment
Investment Program, Proportional Amortization Method, Elected, Commitment
us-gaap_PolicyTextBlockAbstract
Accounting Policies
2026 (9 months)
us-gaap_DisclosureTextBlockAbstract
Notes to Financial Statements
us-gaap_AffordableHousingProjectInvestmentWriteDownAmount
Investment Program, Proportional Amortization Method, Elected, Impairment Loss
2030
us-gaap_TableTextBlock
Notes Tables
Comprehensive Income (Loss) Note [Text Block]
Short-Term Debt [Table]
Proceeds from BOLI death benefit
us-gaap_ComprehensiveIncomeNetOfTax
TOTAL COMPREHENSIVE INCOME
Federal funds sold and other
Short-term borrowings
Short-Term Debt
Significant Accounting Policies [Text Block]
us-gaap_FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresMaximumAmountAvailable
Federal Home Loan Bank, Advances, General Debt Obligations, Maximum Amount Available
us-gaap_FederalHomeLoanBankAdvancesLongTerm
Long-Term Federal Home Loan Bank Advances
Proceeds from maturities and repayments of securities available for sale
Solar Investment Tax Credit [Member]
Relating to solar investment tax credits.
us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount
Less: lease liability expense
us-gaap_OperatingLeaseLiability
Operating Lease, Liability
Loans held for sale, at fair value
Deposits
us-gaap_DepositsFairValueDisclosure
Proceeds from land, building and equipment sales
us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue
Beginning Balance
Ending Balance
us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryDueWithinOneYearOfBalanceSheetDate
Federal Home Loan Bank, Advance, Maturity, Year One
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]
Federal Home Loan Bank Advances [Member]
Securities available for sale, amortized cost
Securities available for sale, amortized cost
Available for sale securities, amortized cost
Transfers between levels
Proceeds from loans held for sale previously classified as portfolio loans
Long-term borrowings
Total long-term borrowings
Payment Deferral [Member]
us-gaap_OperatingLeaseLiabilityStatementOfFinancialPositionExtensibleList
Operating Lease, Liability, Statement of Financial Position [Extensible Enumeration]
Other comprehensive income (loss):
Statement of Stockholders' Equity [Abstract]
Extended Maturity [Member]
Intangible Asset, Finite-Lived, Class [Axis]
Loan Restructuring Modification [Axis]
Statement of Comprehensive Income [Abstract]
Equity securities
Equity Securities, FV-NI
Loan Restructuring Modification [Domain]
Intangible Asset, Finite-Lived, Class [Domain]
Proceeds from loans held for sale
Statement of Cash Flows [Abstract]
Contractual Interest Rate Reduction [Member]
us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent
Change in funded status of post-retirement plan, net of tax
Financing Receivable Portfolio Segment [Axis]
us-gaap_OperatingLeaseRightOfUseAssetStatementOfFinancialPositionExtensibleList
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]
Other comprehensive income (loss)
Other comprehensive (loss) income, net of tax
Long-Term Debt, Type [Domain]
Stockholders' Equity:
Equity Components [Axis]
Core Deposits [Member]
Unfunded Loan Commitment [Member]
Financing Receivable Portfolio Segment [Domain]
Home Equity Loan [Member]
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis, Valuation Techniques [Table Text Block]
Equity Component [Domain]
Fair Value Measurements, Nonrecurring [Table Text Block]
us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet
Total net assets acquired
Fair Value, Inputs, Level 2 [Member]
Fair Value, Inputs, Level 3 [Member]
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-Sale, Parent [Member]
AOCI Attributable to Parent [Member]
Fair Value, Inputs, Level 1 [Member]
Retained Earnings [Member]
Corporate Debt Securities [Member]
Real Estate [Member]
Schedule of Gain (Loss) on Securities [Table]
Subordinated Debt [Member]
Financial Instrument Performance Status [Domain]
Subordinated Debentures
Premises and equipment, net
Financial Asset, Aging [Axis]
Financial Instrument Performance Status [Axis]
Subsequent Event Type [Domain]
Financing Receivable, Nonaccrual [Table Text Block]
Weighted average principal deferred
Weighted average principal deferred of payment deferral of financing receivable modified for debtor experiencing financial difficulty.
Subsequent Event Type [Axis]
Financial Asset, Aging [Domain]
(Credit) for unfunded commitments
(Credit) Provision for credit losses
Credit for credit losses and unfunded loans
Provision for credit losses and unfunded loans
Financial Asset, 30 to 59 Days Past Due [Member]
Stock based compensation expense
Automobiles [Member]
Intangible Asset and Goodwill [Text Block]
Financial Asset, 60 to 89 Days Past Due [Member]
Share-Based Payment Arrangement, Restricted Stock Unit, Activity [Table Text Block]
Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Fair Value Disclosures [Text Block]
fmnb_PolicyTable
us-gaap_GainLossOnDispositionOfAssets
Loss on premises and equipment sales and disposals, net
Supplemental cash flow information:
us-gaap_DebtInstrumentVariableInterestRateTypeExtensibleEnumeration
Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration]
Secured Overnight Financing Rate (SOFR) [Member]
Short-term borrowings
us-gaap_ShorttermDebtFairValue
Long-term borrowings
us-gaap_LongTermDebtFairValue
us-gaap_PaymentsToAcquireEquitySecuritiesFvNi
Purchase of equity securities
Loans held for sale
Proceeds from sales of equity securities
Investment Program, Proportional Amortization Method, Elected [Text Block]
Collateral Held [Domain]
Collateral Held [Axis]
us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAociForInvestmentTransferredFromAvailableForSaleToEquityMethodBeforeTax
Reclassification adjustment for losses (gains) realized in income on fair value hedge
Customer Relationships [Member]
Junior subordinated debentures owed to unconsolidated subsidiary trusts
us-gaap_InvestmentProgramProportionalAmortizationMethodElectedIncomeTaxCreditAndOtherIncomeTaxBenefitAfterAmortizationExpense
Investment Program, Proportional Amortization Method, Elected, Income Tax Credit and Other Income Tax Benefit, after Amortization Expense
Tier 1 risk based capital, capital adequacy, amount
Long-Term Debt [Text Block]
us-gaap_PaymentsToAcquireLifeInsurancePolicies
Purchase of company owned life insurance
Tier 1 risk based capital, well capitalized, amount
Tier 1 risk based capital, actual, amount
Short-Term Debt [Text Block]
Common stock, par value (in dollars per share)
Accumulated other comprehensive income (loss)
Tier 1 leverage, capital adequacy, amount
Tier 1 leverage, well capitalized, amount
us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
Accumulated amortization
Tier 1 leverage, actual, amount
Investment Program, Proportional Amortization Method, Elected [Table]
us-gaap_PaymentsToAcquireLoansAndLeasesHeldForInvestment
Purchase of portfolio loans
Total consolidated income before taxes
INCOME BEFORE INCOME TAXES
Loans
us-gaap_PaymentsForProceedsFromBusinessesAndInterestInAffiliates
Net cash paid in business combinations
Remaining maturity (in years) (Year)
Segment Reporting, Policy [Policy Text Block]
Use of Estimates, Policy [Policy Text Block]
us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)
us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardGross
Restricted share issuance
Risk based capital, capital adequacy, amount
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year)
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]
Risk based capital, actual, amount
us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
Additions to premises and equipment
Lessee, Operating Leases [Text Block]
Vesting of Incentive Plan
Collateralized Mortgage-Backed Securities [Member]
Debt Securities, Available-for-Sale, Unrealized Loss Position, Fair Value [Table]
us-gaap_InvestmentProgramProportionalAmortizationMethodAppliedIncomeTaxCreditAndOtherTaxBenefitAmortizationStatementOfIncomeOrComprehensiveIncomeExtensibleEnumeration
Investment Program, Proportional Amortization Method, Applied, Amortization Expense, Statement of Income or Comprehensive Income [Extensible Enumeration]
us-gaap_NoninterestExpense
TOTAL NONINTEREST EXPENSES
us-gaap_DebtInstrumentFaceAmount
Debt Instrument, Face Amount
Loans, modified
NONINTEREST EXPENSES
Share Issuance as part of a business combination
Schedule of Debt [Table Text Block]
Financial Asset, Not Past Due [Member]
Risk based capital, well capitalized, amount
Loans, modified, subsequent default
Fair Value, Recurring and Nonrecurring [Table]
us-gaap_InvestmentProgramProportionalAmortizationMethodElectedIncomeTaxCreditAndOtherIncomeTaxBenefitBeforeAmortizationStatementOfCashFlowsExtensibleEnumeration
Investment Program, Proportional Amortization Method, Elected, Income Tax Credit and Other Income Tax Benefit, before Amortization, Statement of Cash Flows [Extensible Enumeration]
Credit Loss, Financial Instrument [Text Block]
Trade Names [Member]
us-gaap_InvestmentProgramProportionalAmortizationMethodElectedIncomeTaxCreditAndOtherIncomeTaxBenefitBeforeAmortizationStatementOfIncomeOrComprehensiveIncomeExtensibleEnumeration
Investment Program, Proportional Amortization Method, Elected, Income Tax Credit and Other Income Tax Benefit, before Amortization, Statement of Income or Comprehensive Income [Extensible Enumeration]
Goodwill [Table]
us-gaap_InvestmentProgramProportionalAmortizationMethodAppliedIncomeTaxCreditAndOtherTaxBenefitAmortizationStatementOfCashFlowsExtensibleEnumeration
Investment Program, Proportional Amortization Method, Applied, Amortization Expense, Statement of Cash Flows [Extensible Enumeration]
Restricted Stock Units (RSUs) [Member]
Debt Instrument, Name [Domain]
us-gaap_ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent
Amounts reclassified from accumulated other comprehensive income
us-gaap_DebtInstrumentInterestRateStatedPercentage
Debt Instrument, Interest Rate, Stated Percentage
Fair Value Measurement Inputs and Valuation Techniques [Table]
Other comprehensive income (loss) before reclassification
us-gaap_DebtInstrumentInterestRateEffectivePercentage
Debt Instrument, Interest Rate, Effective Percentage
Investment Commissions [Member]
Relating to investment commissions.
Schedule of Long-Term Debt Instruments [Table]
Retirement Plan Consulting [Member]
Relating to retirement plan consulting.
Debt Instrument [Axis]
Other mortgage banking income (loss), net
Represents the amount of mortgage banking income (expense) classified as other during the period.
Common Stock Including Additional Paid in Capital [Member]
Statement of Other Comprehensive Income [Abstract]
Insurance Agency Commissions [Member]
Relating to insurance agency commissions.
CASH FLOWS FROM OPERATING ACTIVITIES
Proceeds from redemption of restricted stock
Amount of cash inflow from sale of regulatory stock.
us-gaap_StockIssuedDuringPeriodValueTreasuryStockReissued
Restricted share issuance
Middlefield Banc Corp [Member]
Relating to Middlefield Banc Corp.
CASH FLOWS FROM INVESTING ACTIVITIES
Issuance of stock awards
Represents the fair value of awards issued in noncash financing activities.
us-gaap_NetCashProvidedByUsedInOperatingActivities
NET CASH FROM OPERATING ACTIVITIES
Loan originations and payments, net
Cash inflow (outflow) related to a loan origination (the process when securing a mortgage for a piece of real property), lease origination, and principal collections.
fmnb_BankOwnedLifeInsuranceIncomeExcludingDeathBenefit
Earnings on bank owned life insurance
Earnings on or other increases in the value of the cash surrender value of bank owned life insurance policies, excluding death benefits.
CASH FLOWS FROM FINANCING ACTIVITIES
Net (accretion) amortization of securities
Represents the net amortization of securities.
us-gaap_NetCashProvidedByUsedInInvestingActivities
NET CASH FROM INVESTING ACTIVITIES
Financing Receivable, Year One, Originated, Current Fiscal Year
SBIC Funds [Member]
Relating to SBIC Funds.
fmnb_BankOwnedLifeInsuranceIncomeDeathBenefit
Income recognized from death benefit on bank owned life insurance
Earnings on death benefit in the value of the cash surrender value of bank owned life insurance policies.
us-gaap_NetCashProvidedByUsedInFinancingActivities
NET CASH FROM FINANCING ACTIVITIES
Stockholders' Equity, Policy [Policy Text Block]
Bank owned life insurance
fmnb_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedBankOwnedLifeInsurance
The amount of bank owned life insurance recognized as of the acquisition date.
us-gaap_PaymentsToAcquireAvailableForSaleSecuritiesDebt
Purchases of securities available for sale
Proceeds
Proceeds from sales of securities available for sale
Financing Receivable, Revolving
fmnb_DebtSecuritiesAvailableforsaleNumberOfSecurities
Debt Securities, Available-for-Sale, Number of Securities
Represents the number of available for sale securities.
fmnb_BusinessCombinationProFormaInformationProFormaNoninterestIncome
Noninterest income
Amount noninterest income of combined entity as if acquisition date of business combination occurred as of beginning of period.
fmnb_BusinessCombinationProFormaInformationProFormaNoninterestExpense
Noninterest expense (1)
Amount of noninterest expense of combined entity as if acquisition date of business combination occurred as of beginning of period.
Long-term borrowings
fmnb_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesLongTermBorrowings
Amount of long term borrowings assumed in business combination and recognized at acquisition date.
Local and Regional Banks and Other Funds [Member]
Relating to local and regional banks and other funds.
fmnb_BusinessCombinationProFormaInformationProFormaNetInterestIncome
Net interest income
Amount of net interest income of combined entity as if acquisition date of business combination occurred as of beginning of period.
fmnb_BusinessCombinationRecognizedAssetAcquiredFinancialAssetFairValue
Business Combination, Recognized Asset Acquired, Financial Asset, Fair Value
Amount of fair value of financial asset acquired in business combination and recognized at acquisition date.
fmnb_BusinessCombinationRecognizedLiabilityAssumedAllowanceForCreditLossesCurrent
Business Combination, Recognized Liability Assumed, Allowance for Credit Losses, Current
Amount of allowance for credit losses assumed in business combination and recognized at acquisition date, classified as current.
Other assets
fmnb_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherAssets
Amount of other assets acquired at the acquisition date.
Short-term borrowings
fmnb_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesShortTermBorrowings
Amount of short-term borrowings due within one year or within the normal operating cycle, if longer, assumed at the acquisition date.
Advertising
Net change in deposits
Including Day 1 Reserve Related to Merger [Member]
Related to Day 1 reserve related to merger.
Operating Segments [Member]
Forward Sales Contract Liabilities [Member]
Related to forward sales contract liabilities.
Middlefield Statutory Trust I [Member]
Related to Middlefield Statutory Trust I.
fmnb_BusinessCombinationRecognizedAssetAcquiredFinancialAssetGrossContractualAmount
Business Combination, Recognized Asset Acquired, Financial Asset, Gross Contractual Amount
Amount of financial asset gross contractual amount acquired in business combination and recognized at acquisition date.
Accounting Policies [Abstract]
fmnb_FinancingReceivablePurchasedWithCreditDeteriorationFairValue
Financing Receivable, Purchased with Credit Deterioration, Fair Value
Amount at fair value of financing receivable purchased with credit deterioration.
The 2026 Plan [Member]
Related to the 2026 plan.
Segments [Domain]
Small Business Administration [Member]
Relating to Small Business Administration.
Owner Occupied [Member]
Relating to owner occupied.
Farmland [Member]
Relating to farmland.
Nonowner Occupied [Member]
Relating to non-owner occupied.
US Treasury and Government [Member]
Segments [Axis]
US States and Political Subdivisions Debt Securities [Member]
Direct Loans [Member]
Relating to direct loans.
Indirect Loans [Member]
Relating to indirect loans.
Measurement Input, Cap Rate [Member]
Commercial and Industrial [Member]
Relating to commercial and industrial.
Measurement Input Type [Axis]
Income Statement [Abstract]
Other Loans [Member]
Relating to other loans.
1-4 Family Residential [Member]
Relating to 1-4 family residential.
Agricultural [Member]
Relating to agricultural.
us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted
Net income (In thousands of dollars)
us-gaap_NumberOfOperatingSegments
Number of Operating Segments
us-gaap_NumberOfReportableSegments
Number of Reportable Segments
us-gaap_TreasuryStockCommonValue
Treasury stock, at cost; 1,580,496 and 1,668,526 shares in 2026 and 2025, respectively
Treasury stock, shares (in shares)
Treasury Stock, Common [Member]
Net income
NET INCOME
Measurement Input, Price Volatility [Member]
Net income (In thousands of dollars)
us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic
Financial Asset, Past Due [Member]
us-gaap_ForeclosedAssets
Repossessed Assets
Intangible amortization
Intangible Asset, Finite-Lived, Amortization Expense
Valuation Technique, Consensus Pricing Model [Member]
Measurement Input Type [Domain]
us-gaap_InterestIncomeExpenseNet
NET INTEREST INCOME
Accumulated Other Comprehensive Income (Loss) [Table]
Restricted share forfeitures
The amount of restricted stock awards forfeited during the period, net.
Accounting Standards Update and Change in Accounting Principle [Table]
us-gaap_FinancingReceivablePurchasedWithCreditDeteriorationAmountAtPurchasePrice
Purchase price of loans at acquisition
Nonaccrual, no allowance
fmnb_PurchaseOfRegulatoryStock
Purchase of restricted stock
Purchase of regulatory stock.
Occupancy and equipment
Other operating expenses
FDIC insurance and state and local taxes
Core processing charges
Par value of acquired loans at acquisition
us-gaap_FinancingReceivablePurchasedWithCreditDeteriorationDiscountPremium
Financing Receivable, Purchased with Credit Deterioration, Discount (Premium)
Net purchase discount
Bank owned life insurance income
us-gaap_NoninterestIncome
Total noninterest income
NONINTEREST INCOME
us-gaap_DebtSecuritiesAvailableForSaleAllowanceForCreditLoss
Debt Securities, Available-for-Sale, Allowance for Credit Loss
Schedule of Collateral Dependent Loans [Table Text Block]
The tabular disclosure of collateral dependent loans.
Measurement Basis [Axis]
Nonaccrual, with allowance
Amortized cost of financing receivable on nonaccrual status with allowance for credit loss. Excludes net investment in lease.
Financing Receivable, Performance of Modified Loans [Table Text Block]
Tabular disclosure of the performance of modified financing recievables.
Financing Receivable Restructurings [Text Block]
Disclosure of financing receivable restructurings.
Other operating income
Fair Value Hierarchy and NAV [Domain]
Nonaccrual [Member]
Relating to nonaccrual.
Accruing [Member]
Relating to accruing.
Net gains on sale of loans
Net (gains) on sale of loans
Measurement Frequency [Domain]
Cash Collateral [Member]
Relating to cash collateral.
Business Assets [Member]
Relating to business assets.
Statement of Financial Position [Abstract]
Financial Asset, 30 to 89 Days Past Due [Member]
Financial asset more than 29 days past due but fewer than 90 days past due.
Changes in unrealized gains (losses)
us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInOtherComprehensiveIncomeLoss
Noncompete Agreements [Member]
Securities available for sale
fmnb_BusinessCombinationRecognizedIdentifiableAssetsAcquiredSecuritiesAvailableforsale
Business combination recognized identifiable assets acquired securities available-for-sale.
Deposits
fmnb_BusinessCombinationRecognizedIdentifiableAssetsAndLiabilitiesDepositsAssumed
Business combination recognized identifiable assets and liabilities deposits assumed.
Other Assets
Current and deferred taxes
us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxAssets
Professional fees
Fair Value, Nonrecurring [Member]
Accrued interest payable and other liabilities
fmnb_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAccruedInterestPayableAndOtherLiabilities
Business combination recognized identifiable assets acquired and liabilities assumed accrued interest payable and other liabilities.
Fair Value, Recurring [Member]
Common equity tier 1, actual, amount
Common equity tier 1, capital adequacy, amount
fmnb_FinancingReceivableRiskRatingThreshold
Financing Receivable, Risk Rating Threshold
Represents the threshold for financing receivables to be evaluated for risk.
Fair Value Disclosure of Asset and Liability Not Measured at Fair Value [Table]
Fair Value Disclosure of Asset and Liability Not Measured at Fair Value [Table Text Block]
Document Type
Discount accretion (premium amortization)
Amount of accretion of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year
Mortgage banking Derivative [Member]
Relating to mortgage banking derivatives.
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year
Document Information [Line Items]
Document Quarterly Report
Restricted stock
fmnb_RegulatoryStock
Represents the amount of regulatory stock.
us-gaap_LesseeOperatingLeaseRenewalTerm
Lessee, Operating Lease, Renewal Term (Year)
Loans, measurement input
Value of input used to measure loan receivable.
Initial allowance on loans purchased with credit deterioration
Financing Receivable, Purchased with Credit Deterioration, Allowance for Credit Loss at Acquisition Date
Allowance for credit losses of PCD loans
us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1
Operating Lease, Weighted Average Remaining Lease Term (Year)
Loans, held for sale, allowance
Represents the amount of allowance for credit loss for loans receivable held for sale.
Document Information [Table]
Schedule of Loans Held for Sale [Table Text Block]
Tabular disclosure of loans held for sale.
Bank Segment [Member]
Relating to the Bank Segment.
Common equity tier 1, well capitalized, amount
Trust Segment [Member]
Relating to the Trust segment.
us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares)
The 2022 Plan [Member]
Relating to the 2022 Plan.
Antidilutive Securities [Axis]
Service Restricted Stock Units [Member]
Relating to service restricted stock units.
Dilutive effect of restricted stock awards (in shares)
Entity Interactive Data Current
Thereafter
fmnb_LesseeOperatingLeaseLiabilityToBePaidAfterYearFour
Amount of lessee's undiscounted obligation for lease payment for operating lease due after fourth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).
Bank owned life insurance
Financing Receivable, Originated, More than Five Years before Current Fiscal Year
Document Transition Report
Intangible Asset, Finite-Lived, Amortization Expense [Table Text Block]
Thereafter
Amount of amortization for asset, excluding financial asset and goodwill, lacking physical substance with finite life expected to be recognized after fourth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).
us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding
Weighted average shares for diluted earnings per share (in shares)
Forward Sales Contract [Member]
Relating to forward sales contracts.
Total consolidated expenses
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year
Bank [Member]
Relating to bank.
Performance Restricted Stock Units [Member]
Relating to performance restricted stock units.
Unsecured Revolving Line of Credit [Member]
Relating to an unsecured revolving line of credit.
us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss
Net income (1)(2)
Weighted average shares outstanding (in shares)
Below Prime Rate Line of Credit [Member]
Relating to a below prime rate line of credit.
Derivative Instrument [Axis]
Additional Spread Adjustment [Member]
Relating to an additional spread adjustment.
us-gaap_NotesReceivableNet
Net loans
Cortland Acquisition [Member]
Relating to the Cortland acquisition.
EARNINGS PER SHARE - basic (in dollars per share)
Issuance of stock for business combination
Earnings Per Share, Basic, by Common Class, Including Two-Class Method [Table]
TSEO Statutory Trust I [Member]
Relating to TSEO Statutory Trust I.
Cortland Statutory Trust I [Member]
Relating to Cortland Statutory Trust I.
Maple Leaf Financial Statutory Trust II [Member]
Relating to Maple Leaf Financial Statutory Trust II.
Interest-bearing
Debt Securities, Available-for-Sale [Table Text Block]
Transfer of loans to loans held for sale
us-gaap_Deposits
TOTAL DEPOSITS
Affordable Housing Tax Credits [Member]
Relating to affordable housing program tax credits.
Other intangibles, net
us-gaap_GoodwillAcquiredDuringPeriod
Goodwill, Acquired During Period
Noninterest-bearing
us-gaap_FiniteLivedIntangibleAssetsNet
Total
Document Fiscal Period Focus
Gross carrying amount
Document Fiscal Year Focus
Investment, Name [Domain]
Amendment Flag
Financing Receivables [Text Block]
Financing Receivable, Past Due [Table]
Net deferred loan costs
Goodwill created
Goodwill
Goodwill
us-gaap_DebtInstrumentCollateralAmount
Debt Instrument, Collateral Amount
Gross gains
Document Period End Date
INTEREST AND DIVIDEND INCOME
Residential Portfolio Segment [Member]
Dividends
Legal Entity [Axis]
us-gaap_InterestAndDividendIncomeOperating
TOTAL INTEREST AND DIVIDEND INCOME
Consumer Portfolio Segment [Member]
Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Loss [Table]
Security (losses), including fair value changes for equity securities
Commercial Portfolio Segment [Member]
Business Combination [Domain]
Fair value
Derivative, Fair Value, Net
Entity File Number
Fixed pay rates
us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax
Net unrealized holding gains
Entity Tax Identification Number
Supplemental noncash disclosures:
Business Combination [Axis]
Disaggregation of Revenue [Table Text Block]
us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss
Securities available for sale, accumulated loss, less than 12 months
Disaggregation of Revenue [Table]
us-gaap_FinancingReceivableAllowanceForCreditLossesPeriodIncreaseDecrease
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)
us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss
Securities available for sale, accumulated loss, more than 12 months
Entity [Domain]
Entity Central Index Key
Less allowance for credit losses
Financing Receivable, Allowance for Credit Loss
Allowance for credit losses
Beginning balance
Total ending allowance balance
Entity Registrant Name
Current period gross write-offs
us-gaap_FinancingReceivableAllowanceForCreditLossesWriteOffs
Loans charged off
Doubtful [Member]
Performing Financial Instruments [Member]
Entity Current Reporting Status
Business Combination [Table]
Derivative gain (loss)
Derivative, Gain (Loss) on Derivative, Net
us-gaap_DebtSecuritiesAvailableForSaleRealizedLoss
Gross losses
Special Mention [Member]
Substandard [Member]
Entity Incorporation, State or Country Code
Business Combination, Pro Forma Information [Table Text Block]
Pass [Member]
Current Fiscal Year End Date
us-gaap_FinancingReceivableSignificantPurchases
Financing Receivable, Purchase
us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax
Unrealized holding (losses) gains, net of reclassification and tax
Loans, net
us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedFinancialAssets
Cash and cash equivalents
us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents
Entity Filer Category
us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets
Total assets acquired
Entity Shell Company
us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities
Total liabilities
us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax
Income tax effect
Entity Emerging Growth Company
Notional amount fair value hedge
Derivative, Notional Amount
us-gaap_DebtSecuritiesAvailableForSaleGainLoss
Available for sale security losses
Nonperforming Financial Instruments [Member]
Entity Small Business
us-gaap_DerivativeNumberOfInstrumentsHeld
Derivative, Number of Instruments Held
Valuation Approach and Technique [Axis]
Core deposit intangible
us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill
us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet
Net assets acquired
Derivative asset
Derivative Asset
Financing Receivable, Modified [Table]
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
Variable SOFR receive rates
Premises and equipment
us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment
Interest expense - borrowings
Derivative Instruments and Hedging Activities Disclosure [Text Block]
Other expenses *
Valuation Approach and Technique [Domain]
Revenues
Valuation, Market Approach [Member]
Derivative asset, notional amount
Valuation, Income Approach [Member]
us-gaap_BusinessCombinationConsiderationTransferred1
Business Combination, Consideration Transferred
Fair value of total consideration transferred
Interest expense - deposits
Deposits
Entity Address, State or Province
Entity Address, City or Town
Retained earnings
us-gaap_InterestExpenseOperating
TOTAL INTEREST EXPENSE
Entity Address, Address Line One
us-gaap_BusinessCombinationSeparatelyRecognizedTransactionsAdditionalDisclosuresAcquisitionCostExpensed
Business Combination, Separately Recognized Transaction, Acquisition-Related Cost, Expensed
City Area Code
Increase (Decrease) in Other Operating Assets and Liabilities, Net
Net change in other assets and liabilities
Available for sale securities, amortized cost, one to five years
Available for sale securities, amortized cost, five to ten years
us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation
Cash paid for withholding taxes on share-based awards
INTEREST EXPENSE
Local Phone Number
Available for sale securities, amortized cost, within one year
Revenue from Contract with Customer [Text Block]
Entity Address, Postal Zip Code
Derivative [Table]
us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesLongTermDebt
Business Combination, Recognized Liability Assumed, Long-Term Debt, Noncurrent
Available for sale securities, mortgage-backed, collateralized mortgage obligations and Small Business Administration securities
Title of 12(b) Security
Security Exchange Name
Available for sale securities, five to ten years
Trading Symbol
Available for sale securities, beyond ten years
Available for sale securities, within one year
Available for sale securities, one to five years
Available for sale securities, amortized cost, beyond ten years
Available for sale securities, amortized cost, mortgage-backed, collateralized mortgage obligations and Small Business Administration securities
Class of Stock [Axis]
Consolidation, Eliminations [Member]
Prime Rate [Member]
Securities available for sale, fair value
Securities available for sale, at fair value (Amortized cost $1,673,903 in 2026 and $1,525,224 in 2025)
Available for sale securities
Investment securities
Nonaccrual over 89 days and accruing
Class of Financing Receivable [Axis]
Variable Rate [Axis]
Class of Financing Receivable [Domain]
Variable Rate [Domain]
Interest rate before modification
Entity Common Stock, Shares Outstanding
us-gaap_DerivativeAssetFairValueGrossLiability
Derivative Asset, Subject to Master Netting Arrangement, Liability Offset
us-gaap_DerivativeLiabilityFairValueGrossAsset
Derivative Liability, Subject to Master Netting Arrangement, Asset Offset
Interest rate after modification
Interest Rate Contract [Member]
Earnings Per Share [Text Block]
Fair Value Hedging [Member]
Financing Receivable, Credit Quality Indicator [Table]
Long-term borrowings
us-gaap_InterestExpenseLongTermDebt
OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment and Tax
Internal Credit Assessment [Axis]
Short-term borrowings
us-gaap_InterestExpenseShortTermBorrowings
System conversion/Acquisition related costs
Business Combination, Acquisition-Related Cost, Expense
Federal funds sold and other interest income
Repayments, calls and maturities
us-gaap_InterestIncomeExpenseAfterProvisionForLoanLoss
NET INTEREST INCOME AFTER PROVISION FOR CREDIT LOSSES
Acquired and/or purchased
Derivative Instruments, Gain (Loss) [Table Text Block]
Investments Classified by Contractual Maturity Date [Table Text Block]
Internal Credit Assessment [Domain]
Investment, Name [Axis]
Fair Value, Asset, Recurring Basis, Unobservable Input Reconciliation, Asset, Gain (Loss), Statement of Other Comprehensive Income or Comprehensive Income [Extensible Enumeration]
us-gaap_BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable
Stock
Taxable securities
Other Liabilities
Basis of Accounting, Policy [Policy Text Block]
Tax exempt securities
Hedging Relationship [Axis]
Derivative Contract [Domain]
Parent Company [Member]
Equity Securities, Excluding SBIC Fund [Member]
Represents equity securities excluding SBIC funds.
Regulatory Capital Requirements under Banking Regulations [Text Block]
Cash and due from banks
us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax
Reclassification adjustment for losses realized in income on sales
us-gaap_CashCashEquivalentsAndFederalFundsSold
TOTAL CASH AND CASH EQUIVALENTS
Assets
TOTAL ASSETS
Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table]
Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block]
Financing Receivable, Nonaccrual [Table]
Interest income - investments
Loans, modified, percentage
Loans
Loans, gross
Financing Receivable, before Allowance for Credit Loss
EARNINGS PER SHARE - diluted (in dollars per share)
Financing Receivable, Modified, Subsequent Default [Table]
us-gaap_PaymentsToAcquireBusinessesGross
Cash
Debt Securities, Trading, and Equity Securities, FV-NI [Table]
Financing Receivable, Modified, Subsequent Default [Table Text Block]
us-gaap_OtherRealEstate
Other Real Estate
Depreciation and amortization
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff
Schedule of Derivative Instruments [Table Text Block]
us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation
Share forfeitures for taxes
Home Equity Lines of Credit (Year)
Accounts and Financing Receivables [Table]
Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]
Other (outside the scope of ASC 606)
Financing Receivable, Revolving, Writeoff
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff
Interest paid
Interest Rate Swap [Member]
Intangible Asset, Finite-Lived [Table Text Block]
Intangible Asset, Finite-Lived [Table]
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsGranted
Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Granted (in shares)
Extended Maturity and Interest Rate Reduction [Member]
Business Combination [Text Block]
Hedging Relationship [Domain]
Combination Payment Deferral and Interest Rate Reduction [Member]
Related to loan modifications.
us-gaap_StockholdersEquity
TOTAL STOCKHOLDERS' EQUITY
Balance
Balance
Forfeited, weighted average grant date fair value (in dollars per share)
us-gaap_PaymentsOfDividends
Cash dividends paid
us-gaap_PaymentsForOriginationOfMortgageLoansHeldForSale
Origination of loans held for sale
us-gaap_OperatingLeaseRightOfUseAsset
Operating Lease, Right-of-Use Asset
Credit and Debit Card [Member]
ecd_Rule10b51ArrTrmntdFlag
Rule 10b5-1 Arrangement Terminated [Flag]
Revenue from contract with customer
Noninterest revenue
ecd_Rule10b51ArrAdoptedFlag
Rule 10b5-1 Arrangement Adopted [Flag]
Fiduciary and Trust [Member]
Commitments and contingent liabilities