3.25.4 html 620 770 1 false 143 0 false 15 false false R1.htm 995200090 - Document - Document And Entity Information Sheet http://www.cnbankpa.com/role/DocumentDocumentAndEntityInformation Document And Entity Information Cover 1 false false R2.htm 995200100 - Statement - CONSOLIDATED BALANCE SHEETS Sheet http://www.cnbankpa.com/role/StatementConsolidatedBalanceSheets CONSOLIDATED BALANCE SHEETS Statements 2 false false R3.htm 995200105 - Statement - CONSOLIDATED BALANCE SHEETS (Parentheticals) Sheet http://www.cnbankpa.com/role/StatementConsolidatedBalanceSheetsParentheticals CONSOLIDATED BALANCE SHEETS (Parentheticals) Statements 3 false false R4.htm 995200200 - Statement - Consolidated Statements of Income Sheet http://www.cnbankpa.com/role/StatementConsolidatedStatementsOfIncome Consolidated Statements of Income Statements 4 false false R5.htm 995200300 - Statement - Consolidated Statements of Comprehensive Income (Loss) Sheet http://www.cnbankpa.com/role/StatementConsolidatedStatementsOfComprehensiveIncomeLoss Consolidated Statements of Comprehensive Income (Loss) Statements 5 false false R6.htm 995200400 - Statement - Consolidated Statements of Changes in Stockholders' Equity Sheet http://www.cnbankpa.com/role/StatementConsolidatedStatementsOfChangesInStockholdersEquity Consolidated Statements of Changes in Stockholders' Equity Statements 6 false false R7.htm 995200405 - Statement - Consolidated Statements of Changes in Stockholders' Equity (Parentheticals) Sheet http://www.cnbankpa.com/role/StatementConsolidatedStatementsOfChangesInStockholdersEquityParentheticals Consolidated Statements of Changes in Stockholders' Equity (Parentheticals) Statements 7 false false R8.htm 995200500 - Statement - CONSOLIDATED STATEMENTS OF CASH FLOWS Sheet http://www.cnbankpa.com/role/StatementConsolidatedStatementsOfCashFlows CONSOLIDATED STATEMENTS OF CASH FLOWS Statements 8 false false R9.htm 995200505 - Statement - CONSOLIDATED STATEMENTS OF CASH FLOWS (Parentheticals) Sheet http://www.cnbankpa.com/role/StatementConsolidatedStatementsOfCashFlowsParentheticals CONSOLIDATED STATEMENTS OF CASH FLOWS (Parentheticals) Statements 9 false false R10.htm 995210101 - Disclosure - NATURE OF OPERATIONS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Sheet http://www.cnbankpa.com/role/DisclosureNatureOfOperationsAndSummaryOfSignificantAccountingPolicies NATURE OF OPERATIONS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Notes 10 false false R11.htm 995210201 - Disclosure - RECENT ACCOUNTING PRONOUNCEMENTS Sheet http://www.cnbankpa.com/role/DisclosureRecentAccountingPronouncements RECENT ACCOUNTING PRONOUNCEMENTS Notes 11 false false R12.htm 995210301 - Disclosure - BUSINESS COMBINATION Sheet http://www.cnbankpa.com/role/DisclosureBusinessCombination BUSINESS COMBINATION Notes 12 false false R13.htm 995210401 - Disclosure - PER SHARE DATA Sheet http://www.cnbankpa.com/role/DisclosurePerShareData PER SHARE DATA Notes 13 false false R14.htm 995210501 - Disclosure - COMPREHENSIVE INCOME (LOSS) Sheet http://www.cnbankpa.com/role/DisclosureComprehensiveIncomeLoss COMPREHENSIVE INCOME (LOSS) Notes 14 false false R15.htm 995210601 - Disclosure - CASH AND DUE FROM BANKS Sheet http://www.cnbankpa.com/role/DisclosureCashAndDueFromBanks CASH AND DUE FROM BANKS Notes 15 false false R16.htm 995210701 - Disclosure - SECURITIES Sheet http://www.cnbankpa.com/role/DisclosureSecurities SECURITIES Notes 16 false false R17.htm 995210801 - Disclosure - LOANS AND ALLOWANCE FOR CREDIT LOSSES Sheet http://www.cnbankpa.com/role/DisclosureLoansAndAllowanceForCreditLosses LOANS AND ALLOWANCE FOR CREDIT LOSSES Notes 17 false false R18.htm 995210901 - Disclosure - BANK PREMISES AND EQUIPMENT Sheet http://www.cnbankpa.com/role/DisclosureBankPremisesAndEquipment BANK PREMISES AND EQUIPMENT Notes 18 false false R19.htm 995211001 - Disclosure - GOODWILL AND OTHER INTANGIBLE ASSETS, NET Sheet http://www.cnbankpa.com/role/DisclosureGoodwillAndOtherIntangibleAssetsNet GOODWILL AND OTHER INTANGIBLE ASSETS, NET Notes 19 false false R20.htm 995211101 - Disclosure - DEPOSITS Sheet http://www.cnbankpa.com/role/DisclosureDeposits DEPOSITS Notes 20 false false R21.htm 995211201 - Disclosure - BORROWED FUNDS Sheet http://www.cnbankpa.com/role/DisclosureBorrowedFunds BORROWED FUNDS Notes 21 false false R22.htm 995211301 - Disclosure - EMPLOYEE AND POSTRETIREMENT BENEFIT PLANS Sheet http://www.cnbankpa.com/role/DisclosureEmployeeAndPostretirementBenefitPlans EMPLOYEE AND POSTRETIREMENT BENEFIT PLANS Notes 22 false false R23.htm 995211401 - Disclosure - INCOME TAXES Sheet http://www.cnbankpa.com/role/DisclosureIncomeTaxes INCOME TAXES Notes 23 false false R24.htm 995211501 - Disclosure - RELATED PARTY TRANSACTIONS Sheet http://www.cnbankpa.com/role/DisclosureRelatedPartyTransactions RELATED PARTY TRANSACTIONS Notes 24 false false R25.htm 995211601 - Disclosure - OFF-BALANCE SHEET RISK Sheet http://www.cnbankpa.com/role/DisclosureOffBalanceSheetRisk OFF-BALANCE SHEET RISK Notes 25 false false R26.htm 995211701 - Disclosure - OPERATING LEASE COMMITMENTS AND CONTINGENCIES Sheet http://www.cnbankpa.com/role/DisclosureOperatingLeaseCommitmentsAndContingencies OPERATING LEASE COMMITMENTS AND CONTINGENCIES Notes 26 false false R27.htm 995211801 - Disclosure - REGULATORY MATTERS Sheet http://www.cnbankpa.com/role/DisclosureRegulatoryMatters REGULATORY MATTERS Notes 27 false false R28.htm 995211901 - Disclosure - PARENT COMPANY ONLY Sheet http://www.cnbankpa.com/role/DisclosureParentCompanyOnly PARENT COMPANY ONLY Notes 28 false false R29.htm 995212001 - Disclosure - DERIVATIVE FINANCIAL INSTRUMENTS Sheet http://www.cnbankpa.com/role/DisclosureDerivativeFinancialInstruments DERIVATIVE FINANCIAL INSTRUMENTS Notes 29 false false R30.htm 995212101 - Disclosure - FAIR VALUE MEASUREMENTS AND FAIR VALUES OF FINANCIAL INSTRUMENTS Sheet http://www.cnbankpa.com/role/DisclosureFairValueMeasurementsAndFairValuesOfFinancialInstruments FAIR VALUE MEASUREMENTS AND FAIR VALUES OF FINANCIAL INSTRUMENTS Notes 30 false false R31.htm 995212201 - Disclosure - SEGMENT REPORTING Sheet http://www.cnbankpa.com/role/DisclosureSegmentReporting SEGMENT REPORTING Notes 31 false false R32.htm 995410 - Disclosure - Pay vs Performance Disclosure Sheet http://xbrl.sec.gov/ecd/role/PvpDisclosure Pay vs Performance Disclosure Notes 32 false false R33.htm 995445 - Disclosure - Insider Trading Arrangements Sheet http://xbrl.sec.gov/ecd/role/InsiderTradingArrangements Insider Trading Arrangements Notes 33 false false R34.htm 995447 - Disclosure - Insider Trading Policies and Procedures Sheet http://xbrl.sec.gov/ecd/role/InsiderTradingPoliciesProc Insider Trading Policies and Procedures Notes 34 false false R35.htm 995550 - Disclosure - Cybersecurity Risk Management and Strategy Disclosure Sheet http://xbrl.sec.gov/cyd/role/CybersecurityRiskManagementAndStrategyDisclosure Cybersecurity Risk Management and Strategy Disclosure Notes 35 false false R36.htm 99920102 - Disclosure - NATURE OF OPERATIONS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies) Sheet http://www.cnbankpa.com/role/DisclosureNatureOfOperationsAndSummaryOfSignificantAccountingPoliciesPolicies NATURE OF OPERATIONS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies) Policies 36 false false R37.htm 99920202 - Disclosure - RECENT ACCOUNTING PRONOUNCEMENTS (Policies) Sheet http://www.cnbankpa.com/role/DisclosureRecentAccountingPronouncementsPolicies RECENT ACCOUNTING PRONOUNCEMENTS (Policies) Policies 37 false false R38.htm 99930303 - Disclosure - BUSINESS COMBINATIONS (Tables) Sheet http://www.cnbankpa.com/role/DisclosureBusinessCombinationsTables BUSINESS COMBINATIONS (Tables) Tables http://www.cnbankpa.com/role/DisclosureBusinessCombination 38 false false R39.htm 99930403 - Disclosure - PER SHARE DATA (Tables) Sheet http://www.cnbankpa.com/role/DisclosurePerShareDataTables PER SHARE DATA (Tables) Tables http://www.cnbankpa.com/role/DisclosurePerShareData 39 false false R40.htm 99930503 - Disclosure - COMPREHENSIVE INCOME (LOSS) (Tables) Sheet http://www.cnbankpa.com/role/DisclosureComprehensiveIncomeLossTables COMPREHENSIVE INCOME (LOSS) (Tables) Tables http://www.cnbankpa.com/role/DisclosureComprehensiveIncomeLoss 40 false false R41.htm 99930603 - Disclosure - CASH AND DUE FROM BANKS (Tables) Sheet http://www.cnbankpa.com/role/DisclosureCashAndDueFromBanksTables CASH AND DUE FROM BANKS (Tables) Tables http://www.cnbankpa.com/role/DisclosureCashAndDueFromBanks 41 false false R42.htm 99930703 - Disclosure - SECURITIES (Tables) Sheet http://www.cnbankpa.com/role/DisclosureSecuritiesTables SECURITIES (Tables) Tables http://www.cnbankpa.com/role/DisclosureSecurities 42 false false R43.htm 99930803 - Disclosure - LOANS AND ALLOWANCE FOR CREDIT LOSSES (Tables) Sheet http://www.cnbankpa.com/role/DisclosureLoansAndAllowanceForCreditLossesTables LOANS AND ALLOWANCE FOR CREDIT LOSSES (Tables) Tables http://www.cnbankpa.com/role/DisclosureLoansAndAllowanceForCreditLosses 43 false false R44.htm 99930903 - Disclosure - BANK PREMISES AND EQUIPMENT (Tables) Sheet http://www.cnbankpa.com/role/DisclosureBankPremisesAndEquipmentTables BANK PREMISES AND EQUIPMENT (Tables) Tables http://www.cnbankpa.com/role/DisclosureBankPremisesAndEquipment 44 false false R45.htm 99931003 - Disclosure - GOODWILL AND OTHER INTANGIBLE ASSETS, NET (Tables) Sheet http://www.cnbankpa.com/role/DisclosureGoodwillAndOtherIntangibleAssetsNetTables GOODWILL AND OTHER INTANGIBLE ASSETS, NET (Tables) Tables http://www.cnbankpa.com/role/DisclosureGoodwillAndOtherIntangibleAssetsNet 45 false false R46.htm 99931103 - Disclosure - DEPOSITS (Tables) Sheet http://www.cnbankpa.com/role/DisclosureDepositsTables DEPOSITS (Tables) Tables http://www.cnbankpa.com/role/DisclosureDeposits 46 false false R47.htm 99931203 - Disclosure - BORROWED FUNDS (Tables) Sheet http://www.cnbankpa.com/role/DisclosureBorrowedFundsTables BORROWED FUNDS (Tables) Tables http://www.cnbankpa.com/role/DisclosureBorrowedFunds 47 false false R48.htm 99931303 - Disclosure - EMPLOYEE AND POSTRETIREMENT BENEFIT PLANS (Tables) Sheet http://www.cnbankpa.com/role/DisclosureEmployeeAndPostretirementBenefitPlansTables EMPLOYEE AND POSTRETIREMENT BENEFIT PLANS (Tables) Tables http://www.cnbankpa.com/role/DisclosureEmployeeAndPostretirementBenefitPlans 48 false false R49.htm 99931403 - Disclosure - INCOME TAXES (Tables) Sheet http://www.cnbankpa.com/role/DisclosureIncomeTaxesTables INCOME TAXES (Tables) Tables http://www.cnbankpa.com/role/DisclosureIncomeTaxes 49 false false R50.htm 99931503 - Disclosure - RELATED PARTY TRANSACTIONS (Tables) Sheet http://www.cnbankpa.com/role/DisclosureRelatedPartyTransactionsTables RELATED PARTY TRANSACTIONS (Tables) Tables http://www.cnbankpa.com/role/DisclosureRelatedPartyTransactions 50 false false R51.htm 99931603 - Disclosure - OFF-BALANCE SHEET RISK (Tables) Sheet http://www.cnbankpa.com/role/DisclosureOffBalanceSheetRiskTables OFF-BALANCE SHEET RISK (Tables) Tables http://www.cnbankpa.com/role/DisclosureOffBalanceSheetRisk 51 false false R52.htm 99931703 - Disclosure - OPERATING LEASE COMMITMENTS AND CONTINGENCIES (Tables) Sheet http://www.cnbankpa.com/role/DisclosureOperatingLeaseCommitmentsAndContingenciesTables OPERATING LEASE COMMITMENTS AND CONTINGENCIES (Tables) Tables http://www.cnbankpa.com/role/DisclosureOperatingLeaseCommitmentsAndContingencies 52 false false R53.htm 99931803 - Disclosure - REGULATORY MATTERS (Tables) Sheet http://www.cnbankpa.com/role/DisclosureRegulatoryMattersTables REGULATORY MATTERS (Tables) Tables http://www.cnbankpa.com/role/DisclosureRegulatoryMatters 53 false false R54.htm 99931903 - Disclosure - PARENT COMPANY ONLY (Tables) Sheet http://www.cnbankpa.com/role/DisclosureParentCompanyOnlyTables PARENT COMPANY ONLY (Tables) Tables http://www.cnbankpa.com/role/DisclosureParentCompanyOnly 54 false false R55.htm 99932003 - Disclosure - DERIVATIVE FINANCIAL INSTRUMENTS (Tables) Sheet http://www.cnbankpa.com/role/DisclosureDerivativeFinancialInstrumentsTables DERIVATIVE FINANCIAL INSTRUMENTS (Tables) Tables http://www.cnbankpa.com/role/DisclosureDerivativeFinancialInstruments 55 false false R56.htm 99932103 - Disclosure - FAIR VALUE MEASUREMENTS AND FAIR VALUES OF FINANCIAL INSTRUMENTS (Tables) Sheet http://www.cnbankpa.com/role/DisclosureFairValueMeasurementsAndFairValuesOfFinancialInstrumentsTables FAIR VALUE MEASUREMENTS AND FAIR VALUES OF FINANCIAL INSTRUMENTS (Tables) Tables http://www.cnbankpa.com/role/DisclosureFairValueMeasurementsAndFairValuesOfFinancialInstruments 56 false false R57.htm 99932203 - Disclosure - SEGMENT REPORTING (Tables) Sheet http://www.cnbankpa.com/role/DisclosureSegmentReportingTables SEGMENT REPORTING (Tables) Tables http://www.cnbankpa.com/role/DisclosureSegmentReporting 57 false false R58.htm 99940101 - Disclosure - NATURE OF OPERATIONS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) Sheet http://www.cnbankpa.com/role/DisclosureNatureOfOperationsAndSummaryOfSignificantAccountingPoliciesDetails NATURE OF OPERATIONS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) Details http://www.cnbankpa.com/role/DisclosureNatureOfOperationsAndSummaryOfSignificantAccountingPoliciesPolicies 58 false false R59.htm 99940201 - Disclosure - RECENT ACCOUNTING PRONOUNCEMENTS (Details) Sheet http://www.cnbankpa.com/role/DisclosureRecentAccountingPronouncementsDetails RECENT ACCOUNTING PRONOUNCEMENTS (Details) Details http://www.cnbankpa.com/role/DisclosureRecentAccountingPronouncementsPolicies 59 false false R60.htm 99940301 - Disclosure - BUSINESS COMBINATIONS - (Details) Sheet http://www.cnbankpa.com/role/DisclosureBusinessCombinationsDetails BUSINESS COMBINATIONS - (Details) Details http://www.cnbankpa.com/role/DisclosureBusinessCombinationsTables 60 false false R61.htm 99940302 - Disclosure - BUSINESS COMBINATIONS - Summary of Cnsideration (Details) Sheet http://www.cnbankpa.com/role/DisclosureBusinessCombinationsSummaryOfCnsiderationDetails BUSINESS COMBINATIONS - Summary of Cnsideration (Details) Details 61 false false R62.htm 99940303 - Disclosure - BUSINESS COMBINATIONS - Assets Acquired and Liabilities Assumed (Details) Sheet http://www.cnbankpa.com/role/DisclosureBusinessCombinationsAssetsAcquiredAndLiabilitiesAssumedDetails BUSINESS COMBINATIONS - Assets Acquired and Liabilities Assumed (Details) Details 62 false false R63.htm 99940304 - Disclosure - BUSINESS COMBINATIONS - PCD and Non-PCD (Details) Sheet http://www.cnbankpa.com/role/DisclosureBusinessCombinationsPcdAndNonPcdDetails BUSINESS COMBINATIONS - PCD and Non-PCD (Details) Details 63 false false R64.htm 99940305 - Disclosure - BUSINESS COMBINATIONS - Pro-forma (Details) Sheet http://www.cnbankpa.com/role/DisclosureBusinessCombinationsProFormaDetails BUSINESS COMBINATIONS - Pro-forma (Details) Details 64 false false R65.htm 99940401 - Disclosure - PER SHARE DATA (Details) Sheet http://www.cnbankpa.com/role/DisclosurePerShareDataDetails PER SHARE DATA (Details) Details http://www.cnbankpa.com/role/DisclosurePerShareDataTables 65 false false R66.htm 99940501 - Disclosure - COMPREHENSIVE INCOME (LOSS) - Components (Details) Sheet http://www.cnbankpa.com/role/DisclosureComprehensiveIncomeLossComponentsDetails COMPREHENSIVE INCOME (LOSS) - Components (Details) Details http://www.cnbankpa.com/role/DisclosureComprehensiveIncomeLossTables 66 false false R67.htm 99940502 - Disclosure - COMPREHENSIVE INCOME (LOSS) - Changes of AOCI (Details) Sheet http://www.cnbankpa.com/role/DisclosureComprehensiveIncomeLossChangesOfAociDetails COMPREHENSIVE INCOME (LOSS) - Changes of AOCI (Details) Details http://www.cnbankpa.com/role/DisclosureComprehensiveIncomeLossTables 67 false false R68.htm 99940601 - Disclosure - CASH AND DUE FROM BANKS (Details) Sheet http://www.cnbankpa.com/role/DisclosureCashAndDueFromBanksDetails CASH AND DUE FROM BANKS (Details) Details http://www.cnbankpa.com/role/DisclosureCashAndDueFromBanksTables 68 false false R69.htm 99940701 - Disclosure - SECURITIES - Available-for-sale Securities (Details) Sheet http://www.cnbankpa.com/role/DisclosureSecuritiesAvailableForSaleSecuritiesDetails SECURITIES - Available-for-sale Securities (Details) Details 69 false false R70.htm 99940702 - Disclosure - SECURITIES - Available-for-sale Securities With Unrealized Loss Positions (Details) Sheet http://www.cnbankpa.com/role/DisclosureSecuritiesAvailableForSaleSecuritiesWithUnrealizedLossPositionsDetails SECURITIES - Available-for-sale Securities With Unrealized Loss Positions (Details) Details 70 false false R71.htm 99940703 - Disclosure - SECURITIES - Gross Realized Gains and Losses From Available-for-sale Debt Securities (Details) Sheet http://www.cnbankpa.com/role/DisclosureSecuritiesGrossRealizedGainsAndLossesFromAvailableForSaleDebtSecuritiesDetails SECURITIES - Gross Realized Gains and Losses From Available-for-sale Debt Securities (Details) Details 71 false false R72.htm 99940704 - Disclosure - SECURITIES - Available-for-sale Debt Securities by Contractual Maturity (Details) Sheet http://www.cnbankpa.com/role/DisclosureSecuritiesAvailableForSaleDebtSecuritiesByContractualMaturityDetails SECURITIES - Available-for-sale Debt Securities by Contractual Maturity (Details) Details 72 false false R73.htm 99940705 - Disclosure - SECURITIES - Collateral (Details) Sheet http://www.cnbankpa.com/role/DisclosureSecuritiesCollateralDetails SECURITIES - Collateral (Details) Details 73 false false R74.htm 99940706 - Disclosure - SECURITIES - Debt Securities (Details) Sheet http://www.cnbankpa.com/role/DisclosureSecuritiesDebtSecuritiesDetails SECURITIES - Debt Securities (Details) Details 74 false false R75.htm 99940707 - Disclosure - SECURITIES - Equity Securities (Details) Sheet http://www.cnbankpa.com/role/DisclosureSecuritiesEquitySecuritiesDetails SECURITIES - Equity Securities (Details) Details 75 false false R76.htm 99940801 - Disclosure - LOANS AND ALLOWANCE FOR CREDIT LOSSES - Summary of Loans by Type (Details) Sheet http://www.cnbankpa.com/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfLoansByTypeDetails LOANS AND ALLOWANCE FOR CREDIT LOSSES - Summary of Loans by Type (Details) Details 76 false false R77.htm 99940802 - Disclosure - LOANS AND ALLOWANCE FOR CREDIT LOSSES - Analysis of past due loans (Details) Sheet http://www.cnbankpa.com/role/DisclosureLoansAndAllowanceForCreditLossesAnalysisOfPastDueLoansDetails LOANS AND ALLOWANCE FOR CREDIT LOSSES - Analysis of past due loans (Details) Details 77 false false R78.htm 99940803 - Disclosure - LOANS AND ALLOWANCE FOR CREDIT LOSSES - Loans By Credit Quality Indicators and Origination Year (Details) Sheet http://www.cnbankpa.com/role/DisclosureLoansAndAllowanceForCreditLossesLoansByCreditQualityIndicatorsAndOriginationYearDetails LOANS AND ALLOWANCE FOR CREDIT LOSSES - Loans By Credit Quality Indicators and Origination Year (Details) Details 78 false false R79.htm 99940804 - Disclosure - LOANS AND ALLOWANCE FOR CREDIT LOSSES - Nonaccrual Loans (Details) Sheet http://www.cnbankpa.com/role/DisclosureLoansAndAllowanceForCreditLossesNonaccrualLoansDetails LOANS AND ALLOWANCE FOR CREDIT LOSSES - Nonaccrual Loans (Details) Details 79 false false R80.htm 99940805 - Disclosure - LOANS AND ALLOWANCE FOR CREDIT LOSSES - Accrued Interest Receivables (Details) Sheet http://www.cnbankpa.com/role/DisclosureLoansAndAllowanceForCreditLossesAccruedInterestReceivablesDetails LOANS AND ALLOWANCE FOR CREDIT LOSSES - Accrued Interest Receivables (Details) Details 80 false false R81.htm 99940806 - Disclosure - LOANS AND ALLOWANCE FOR CREDIT LOSSES - Amortized Cost Of Collateral Dependent Loans (Details) Sheet http://www.cnbankpa.com/role/DisclosureLoansAndAllowanceForCreditLossesAmortizedCostOfCollateralDependentLoansDetails LOANS AND ALLOWANCE FOR CREDIT LOSSES - Amortized Cost Of Collateral Dependent Loans (Details) Details 81 false false R82.htm 99940807 - Disclosure - LOANS AND ALLOWANCE FOR CREDIT LOSSES - Allowance for Credit Losses (Details) Sheet http://www.cnbankpa.com/role/DisclosureLoansAndAllowanceForCreditLossesAllowanceForCreditLossesDetails LOANS AND ALLOWANCE FOR CREDIT LOSSES - Allowance for Credit Losses (Details) Details 82 false false R83.htm 99940810 - Disclosure - LOANS AND ALLOWANCE FOR CREDIT LOSSES - Modifications (Details) Sheet http://www.cnbankpa.com/role/DisclosureLoansAndAllowanceForCreditLossesModificationsDetails LOANS AND ALLOWANCE FOR CREDIT LOSSES - Modifications (Details) Details 83 false false R84.htm 99940811 - Disclosure - LOANS AND ALLOWANCE FOR CREDIT LOSSES - Foreclosed Residential Real Estate (Details) Sheet http://www.cnbankpa.com/role/DisclosureLoansAndAllowanceForCreditLossesForeclosedResidentialRealEstateDetails LOANS AND ALLOWANCE FOR CREDIT LOSSES - Foreclosed Residential Real Estate (Details) Details 84 false false R85.htm 99940812 - Disclosure - LOANS AND ALLOWANCE FOR CREDIT LOSSES - Mortgage Loans in Process of Foreclosure (Details) Sheet http://www.cnbankpa.com/role/DisclosureLoansAndAllowanceForCreditLossesMortgageLoansInProcessOfForeclosureDetails LOANS AND ALLOWANCE FOR CREDIT LOSSES - Mortgage Loans in Process of Foreclosure (Details) Details 85 false false R86.htm 99940813 - Disclosure - LOANS AND ALLOWANCE FOR CREDIT LOSSES - Off-Balance Sheet Risk Amount (Details) Sheet http://www.cnbankpa.com/role/DisclosureLoansAndAllowanceForCreditLossesOffBalanceSheetRiskAmountDetails LOANS AND ALLOWANCE FOR CREDIT LOSSES - Off-Balance Sheet Risk Amount (Details) Details 86 false false R87.htm 99940814 - Disclosure - LOANS AND ALLOWANCE FOR CREDIT LOSSES - Credit Losses For Off- Balance Sheet (Details) Sheet http://www.cnbankpa.com/role/DisclosureLoansAndAllowanceForCreditLossesCreditLossesForOffBalanceSheetDetails LOANS AND ALLOWANCE FOR CREDIT LOSSES - Credit Losses For Off- Balance Sheet (Details) Details 87 false false R88.htm 99940901 - Disclosure - BANK PREMISES AND EQUIPMENT - Summary of Bank Premises and Equipment (Details) Sheet http://www.cnbankpa.com/role/DisclosureBankPremisesAndEquipmentSummaryOfBankPremisesAndEquipmentDetails BANK PREMISES AND EQUIPMENT - Summary of Bank Premises and Equipment (Details) Details 88 false false R89.htm 99940902 - Disclosure - BANK PREMISES AND EQUIPMENT - Depreciation Expense (Details) Sheet http://www.cnbankpa.com/role/DisclosureBankPremisesAndEquipmentDepreciationExpenseDetails BANK PREMISES AND EQUIPMENT - Depreciation Expense (Details) Details 89 false false R90.htm 99941001 - Disclosure - GOODWILL AND OTHER INTANGIBLE ASSETS, NET - Goodwill (Details) Sheet http://www.cnbankpa.com/role/DisclosureGoodwillAndOtherIntangibleAssetsNetGoodwillDetails GOODWILL AND OTHER INTANGIBLE ASSETS, NET - Goodwill (Details) Details 90 false false R91.htm 99941002 - Disclosure - GOODWILL AND OTHER INTANGIBLE ASSETS, NET - Core Deposit Intangibles (Details) Sheet http://www.cnbankpa.com/role/DisclosureGoodwillAndOtherIntangibleAssetsNetCoreDepositIntangiblesDetails GOODWILL AND OTHER INTANGIBLE ASSETS, NET - Core Deposit Intangibles (Details) Details 91 false false R92.htm 99941003 - Disclosure - GOODWILL AND OTHER INTANGIBLE ASSETS, NET - Amortization Expense Core Deposit Intangibles (Details) Sheet http://www.cnbankpa.com/role/DisclosureGoodwillAndOtherIntangibleAssetsNetAmortizationExpenseCoreDepositIntangiblesDetails GOODWILL AND OTHER INTANGIBLE ASSETS, NET - Amortization Expense Core Deposit Intangibles (Details) Details 92 false false R93.htm 99941004 - Disclosure - GOODWILL AND OTHER INTANGIBLE ASSETS, NET - Future Amortization Expense (Details) Sheet http://www.cnbankpa.com/role/DisclosureGoodwillAndOtherIntangibleAssetsNetFutureAmortizationExpenseDetails GOODWILL AND OTHER INTANGIBLE ASSETS, NET - Future Amortization Expense (Details) Details 93 false false R94.htm 99941101 - Disclosure - DEPOSITS - Scheduled Maturities of Time Deposits (Details) Sheet http://www.cnbankpa.com/role/DisclosureDepositsScheduledMaturitiesOfTimeDepositsDetails DEPOSITS - Scheduled Maturities of Time Deposits (Details) Details 94 false false R95.htm 99941102 - Disclosure - DEPOSITS - Remaining Maturities of Time Deposits In Excess of 250,000 (Details) Sheet http://www.cnbankpa.com/role/DisclosureDepositsRemainingMaturitiesOfTimeDepositsInExcessOf250000Details DEPOSITS - Remaining Maturities of Time Deposits In Excess of 250,000 (Details) Details 95 false false R96.htm 99941201 - Disclosure - BORROWED FUNDS - Short-term borrowings (Details) Sheet http://www.cnbankpa.com/role/DisclosureBorrowedFundsShortTermBorrowingsDetails BORROWED FUNDS - Short-term borrowings (Details) Details 96 false false R97.htm 99941202 - Disclosure - BORROWED FUNDS - Short-term borrowings - Additional information (Details) Sheet http://www.cnbankpa.com/role/DisclosureBorrowedFundsShortTermBorrowingsAdditionalInformationDetails BORROWED FUNDS - Short-term borrowings - Additional information (Details) Details 97 false false R98.htm 99941203 - Disclosure - BORROWED FUNDS - Long-term Borrowings (Details) Sheet http://www.cnbankpa.com/role/DisclosureBorrowedFundsLongTermBorrowingsDetails BORROWED FUNDS - Long-term Borrowings (Details) Details 98 false false R99.htm 99941204 - Disclosure - BORROWED FUNDS - Senior Notes (Details) Notes http://www.cnbankpa.com/role/DisclosureBorrowedFundsSeniorNotesDetails BORROWED FUNDS - Senior Notes (Details) Details 99 false false R100.htm 99941205 - Disclosure - BORROWED FUNDS - Subordinated Debt (Details) Sheet http://www.cnbankpa.com/role/DisclosureBorrowedFundsSubordinatedDebtDetails BORROWED FUNDS - Subordinated Debt (Details) Details 100 false false R101.htm 99941301 - Disclosure - EMPLOYEE AND POSTRETIREMENT BENEFIT PLANS - Funded Status of Defined Benefit Plans (Details) Sheet http://www.cnbankpa.com/role/DisclosureEmployeeAndPostretirementBenefitPlansFundedStatusOfDefinedBenefitPlansDetails EMPLOYEE AND POSTRETIREMENT BENEFIT PLANS - Funded Status of Defined Benefit Plans (Details) Details 101 false false R102.htm 99941302 - Disclosure - EMPLOYEE AND POSTRETIREMENT BENEFIT PLANS - Liabilities in Balance Sheet (Details) Sheet http://www.cnbankpa.com/role/DisclosureEmployeeAndPostretirementBenefitPlansLiabilitiesInBalanceSheetDetails EMPLOYEE AND POSTRETIREMENT BENEFIT PLANS - Liabilities in Balance Sheet (Details) Details 102 false false R103.htm 99941303 - Disclosure - EMPLOYEE AND POSTRETIREMENT BENEFIT PLANS - Items Included in Accumulated Other Comprehensive Income (Details) Sheet http://www.cnbankpa.com/role/DisclosureEmployeeAndPostretirementBenefitPlansItemsIncludedInAccumulatedOtherComprehensiveIncomeDetails EMPLOYEE AND POSTRETIREMENT BENEFIT PLANS - Items Included in Accumulated Other Comprehensive Income (Details) Details 103 false false R104.htm 99941304 - Disclosure - EMPLOYEE AND POSTRETIREMENT BENEFIT PLANS - Net Periodic Benefit Costs (Details) Sheet http://www.cnbankpa.com/role/DisclosureEmployeeAndPostretirementBenefitPlansNetPeriodicBenefitCostsDetails EMPLOYEE AND POSTRETIREMENT BENEFIT PLANS - Net Periodic Benefit Costs (Details) Details 104 false false R105.htm 99941305 - Disclosure - EMPLOYEE AND POSTRETIREMENT BENEFIT PLANS - Assumptions Used to Determine Net Periodic Benefit Cost (Details) Sheet http://www.cnbankpa.com/role/DisclosureEmployeeAndPostretirementBenefitPlansAssumptionsUsedToDetermineNetPeriodicBenefitCostDetails EMPLOYEE AND POSTRETIREMENT BENEFIT PLANS - Assumptions Used to Determine Net Periodic Benefit Cost (Details) Details 105 false false R106.htm 99941306 - Disclosure - EMPLOYEE AND POSTRETIREMENT BENEFIT PLANS - Future Benefit Payments (Details) Sheet http://www.cnbankpa.com/role/DisclosureEmployeeAndPostretirementBenefitPlansFutureBenefitPaymentsDetails EMPLOYEE AND POSTRETIREMENT BENEFIT PLANS - Future Benefit Payments (Details) Details 106 false false R107.htm 99941308 - Disclosure - EMPLOYEE AND POSTRETIREMENT BENEFIT PLANS - Profit Sharing and Deferred Compensation Plans (Details) Sheet http://www.cnbankpa.com/role/DisclosureEmployeeAndPostretirementBenefitPlansProfitSharingAndDeferredCompensationPlansDetails EMPLOYEE AND POSTRETIREMENT BENEFIT PLANS - Profit Sharing and Deferred Compensation Plans (Details) Details 107 false false R108.htm 99941309 - Disclosure - EMPLOYEE AND POSTRETIREMENT BENEFIT PLANS - Stock Based Compensation Paragraphs (Details) Sheet http://www.cnbankpa.com/role/DisclosureEmployeeAndPostretirementBenefitPlansStockBasedCompensationParagraphsDetails EMPLOYEE AND POSTRETIREMENT BENEFIT PLANS - Stock Based Compensation Paragraphs (Details) Details 108 false false R109.htm 99941310 - Disclosure - EMPLOYEE AND POSTRETIREMENT BENEFIT PLANS - Stock-based Compensation Expense (Details) Sheet http://www.cnbankpa.com/role/DisclosureEmployeeAndPostretirementBenefitPlansStockBasedCompensationExpenseDetails EMPLOYEE AND POSTRETIREMENT BENEFIT PLANS - Stock-based Compensation Expense (Details) Details 109 false false R110.htm 99941311 - Disclosure - EMPLOYEE AND POSTRETIREMENT BENEFIT PLANS - Non-vested Stock Options and Restricted Stock Activity (Details) Sheet http://www.cnbankpa.com/role/DisclosureEmployeeAndPostretirementBenefitPlansNonVestedStockOptionsAndRestrictedStockActivityDetails EMPLOYEE AND POSTRETIREMENT BENEFIT PLANS - Non-vested Stock Options and Restricted Stock Activity (Details) Details 110 false false R111.htm 99941312 - Disclosure - EMPLOYEE AND POSTRETIREMENT BENEFIT PLANS - Awarded Shares of Restricted Stock Under Stock Incentive Plan (Details) Sheet http://www.cnbankpa.com/role/DisclosureEmployeeAndPostretirementBenefitPlansAwardedSharesOfRestrictedStockUnderStockIncentivePlanDetails EMPLOYEE AND POSTRETIREMENT BENEFIT PLANS - Awarded Shares of Restricted Stock Under Stock Incentive Plan (Details) Details 111 false false R112.htm 99941313 - Disclosure - EMPLOYEE AND POSTRETIREMENT BENEFIT PLANS - Stock Option Activity (Details) Sheet http://www.cnbankpa.com/role/DisclosureEmployeeAndPostretirementBenefitPlansStockOptionActivityDetails EMPLOYEE AND POSTRETIREMENT BENEFIT PLANS - Stock Option Activity (Details) Details 112 false false R113.htm 99941401 - Disclosure - INCOME TAXES - Net Deferred Tax Assets (Details) Sheet http://www.cnbankpa.com/role/DisclosureIncomeTaxesNetDeferredTaxAssetsDetails INCOME TAXES - Net Deferred Tax Assets (Details) Details 113 false false R114.htm 99941402 - Disclosure - Provision for Income Taxes - Current Year (Details) Sheet http://www.cnbankpa.com/role/DisclosureProvisionForIncomeTaxesCurrentYearDetails Provision for Income Taxes - Current Year (Details) Details 114 false false R115.htm 99941403 - Disclosure - INCOME TAXES - Provision for Income Taxes - Prior Years (Details) Sheet http://www.cnbankpa.com/role/DisclosureIncomeTaxesProvisionForIncomeTaxesPriorYearsDetails INCOME TAXES - Provision for Income Taxes - Prior Years (Details) Details 115 false false R116.htm 99941404 - Disclosure - INCOME TAXES - Reconciliation of Income Tax (Details) Sheet http://www.cnbankpa.com/role/DisclosureIncomeTaxesReconciliationOfIncomeTaxDetails INCOME TAXES - Reconciliation of Income Tax (Details) Details 116 false false R117.htm 99941405 - Disclosure - INCOME TAXES - Income taxes paid (Details) Sheet http://www.cnbankpa.com/role/DisclosureIncomeTaxesIncomeTaxesPaidDetails INCOME TAXES - Income taxes paid (Details) Details 117 false false R118.htm 99941406 - Disclosure - INCOME TAXES - Paragraphs (Details) Sheet http://www.cnbankpa.com/role/DisclosureIncomeTaxesParagraphsDetails INCOME TAXES - Paragraphs (Details) Details 118 false false R119.htm 99941501 - Disclosure - RELATED PARTY TRANSACTIONS - (Details) Sheet http://www.cnbankpa.com/role/DisclosureRelatedPartyTransactionsDetails RELATED PARTY TRANSACTIONS - (Details) Details http://www.cnbankpa.com/role/DisclosureRelatedPartyTransactionsTables 119 false false R120.htm 99941601 - Disclosure - OFF-BALANCE SHEET RISK - Financial Instruments Whose Contract Amounts Represent Credit Risk (Details) Sheet http://www.cnbankpa.com/role/DisclosureOffBalanceSheetRiskFinancialInstrumentsWhoseContractAmountsRepresentCreditRiskDetails OFF-BALANCE SHEET RISK - Financial Instruments Whose Contract Amounts Represent Credit Risk (Details) Details 120 false false R121.htm 99941602 - Disclosure - OFF-BALANCE SHEET RISK - Standby Letters of Credit Expirations (Details) Sheet http://www.cnbankpa.com/role/DisclosureOffBalanceSheetRiskStandbyLettersOfCreditExpirationsDetails OFF-BALANCE SHEET RISK - Standby Letters of Credit Expirations (Details) Details 121 false false R122.htm 99941701 - Disclosure - OPERATING LEASE COMMITMENTS AND CONTINGENCIES - Assets and Liabilities (Details) Sheet http://www.cnbankpa.com/role/DisclosureOperatingLeaseCommitmentsAndContingenciesAssetsAndLiabilitiesDetails OPERATING LEASE COMMITMENTS AND CONTINGENCIES - Assets and Liabilities (Details) Details 122 false false R123.htm 99941702 - Disclosure - OPERATING LEASE COMMITMENTS AND CONTINGENCIES - Expense (Details) Sheet http://www.cnbankpa.com/role/DisclosureOperatingLeaseCommitmentsAndContingenciesExpenseDetails OPERATING LEASE COMMITMENTS AND CONTINGENCIES - Expense (Details) Details http://www.cnbankpa.com/role/DisclosureOperatingLeaseCommitmentsAndContingenciesTables 123 false false R124.htm 99941703 - Disclosure - OPERATING LEASE COMMITMENTS AND CONTINGENCIES - Maturity (Details) Sheet http://www.cnbankpa.com/role/DisclosureOperatingLeaseCommitmentsAndContingenciesMaturityDetails OPERATING LEASE COMMITMENTS AND CONTINGENCIES - Maturity (Details) Details http://www.cnbankpa.com/role/DisclosureOperatingLeaseCommitmentsAndContingenciesTables 124 false false R125.htm 99941704 - Disclosure - OPERATING LEASE COMMITMENTS AND CONTINGENCIES - Class Action Litigation (Details) Sheet http://www.cnbankpa.com/role/DisclosureOperatingLeaseCommitmentsAndContingenciesClassActionLitigationDetails OPERATING LEASE COMMITMENTS AND CONTINGENCIES - Class Action Litigation (Details) Details 125 false false R126.htm 99941801 - Disclosure - REGULATORY MATTERS - Capital Amounts and Ratios (Details) Sheet http://www.cnbankpa.com/role/DisclosureRegulatoryMattersCapitalAmountsAndRatiosDetails REGULATORY MATTERS - Capital Amounts and Ratios (Details) Details 126 false false R127.htm 99941802 - Disclosure - REGULATORY MATTERS - Transition Schedule for New Ratios, Including the Capital Conservation Buffer (Details) Sheet http://www.cnbankpa.com/role/DisclosureRegulatoryMattersTransitionScheduleForNewRatiosIncludingCapitalConservationBufferDetails REGULATORY MATTERS - Transition Schedule for New Ratios, Including the Capital Conservation Buffer (Details) Details 127 false false R128.htm 99941803 - Disclosure - REGULATORY MATTERS - Payout Restrictions Based on the Capital Conservation Buffer (Details) Sheet http://www.cnbankpa.com/role/DisclosureRegulatoryMattersPayoutRestrictionsBasedOnCapitalConservationBufferDetails REGULATORY MATTERS - Payout Restrictions Based on the Capital Conservation Buffer (Details) Details 128 false false R129.htm 99941804 - Disclosure - REGULATORY MATTERS - Paragraphs (Details) Sheet http://www.cnbankpa.com/role/DisclosureRegulatoryMattersParagraphsDetails REGULATORY MATTERS - Paragraphs (Details) Details 129 false false R130.htm 99941901 - Disclosure - PARENT COMPANY ONLY - Condensed Balance Sheet (Details) Sheet http://www.cnbankpa.com/role/DisclosureParentCompanyOnlyCondensedBalanceSheetDetails PARENT COMPANY ONLY - Condensed Balance Sheet (Details) Details 130 false false R131.htm 99941902 - Disclosure - PARENT COMPANY ONLY - Condensed Income Statement and Comprehensive Income (Loss) (Details) Sheet http://www.cnbankpa.com/role/DisclosureParentCompanyOnlyCondensedIncomeStatementAndComprehensiveIncomeLossDetails PARENT COMPANY ONLY - Condensed Income Statement and Comprehensive Income (Loss) (Details) Details 131 false false R132.htm 99941903 - Disclosure - PARENT COMPANY ONLY - Condensed Statement of Cash Flows (Details) Sheet http://www.cnbankpa.com/role/DisclosureParentCompanyOnlyCondensedStatementOfCashFlowsDetails PARENT COMPANY ONLY - Condensed Statement of Cash Flows (Details) Details 132 false false R133.htm 99942001 - Disclosure - DERIVATIVE FINANCIAL INSTRUMENTS - (Details) Sheet http://www.cnbankpa.com/role/DisclosureDerivativeFinancialInstrumentsDetails DERIVATIVE FINANCIAL INSTRUMENTS - (Details) Details http://www.cnbankpa.com/role/DisclosureDerivativeFinancialInstrumentsTables 133 false false R134.htm 99942101 - Disclosure - FAIR VALUE MEASUREMENTS AND FAIR VALUES OF FINANCIAL INSTRUMENTS - Assets Measured at Fair Value (Details) Sheet http://www.cnbankpa.com/role/DisclosureFairValueMeasurementsAndFairValuesOfFinancialInstrumentsAssetsMeasuredAtFairValueDetails FAIR VALUE MEASUREMENTS AND FAIR VALUES OF FINANCIAL INSTRUMENTS - Assets Measured at Fair Value (Details) Details 134 false false R135.htm 99942102 - Disclosure - FAIR VALUE MEASUREMENTS AND FAIR VALUES OF FINANCIAL INSTRUMENTS - Level 3 Valuation Techniques Recurring (Details) Sheet http://www.cnbankpa.com/role/DisclosureFairValueMeasurementsAndFairValuesOfFinancialInstrumentsLevel3ValuationTechniquesRecurringDetails FAIR VALUE MEASUREMENTS AND FAIR VALUES OF FINANCIAL INSTRUMENTS - Level 3 Valuation Techniques Recurring (Details) Details 135 false false R136.htm 99942103 - Disclosure - FAIR VALUE MEASUREMENTS AND FAIR VALUES OF FINANCIAL INSTRUMENTS - Level 3 Reconciliation (Details) Sheet http://www.cnbankpa.com/role/DisclosureFairValueMeasurementsAndFairValuesOfFinancialInstrumentsLevel3ReconciliationDetails FAIR VALUE MEASUREMENTS AND FAIR VALUES OF FINANCIAL INSTRUMENTS - Level 3 Reconciliation (Details) Details 136 false false R137.htm 99942104 - Disclosure - FAIR VALUE MEASUREMENTS AND FAIR VALUES OF FINANCIAL INSTRUMENTS - Level 3 Valuation Techniques Nonrecurring (Details) Sheet http://www.cnbankpa.com/role/DisclosureFairValueMeasurementsAndFairValuesOfFinancialInstrumentsLevel3ValuationTechniquesNonrecurringDetails FAIR VALUE MEASUREMENTS AND FAIR VALUES OF FINANCIAL INSTRUMENTS - Level 3 Valuation Techniques Nonrecurring (Details) Details 137 false false R138.htm 99942105 - Disclosure - FAIR VALUE MEASUREMENTS AND FAIR VALUES OF FINANCIAL INSTRUMENTS - Financial Instruments Not Recorded at Fair Value (Details) Sheet http://www.cnbankpa.com/role/DisclosureFairValueMeasurementsAndFairValuesOfFinancialInstrumentsFinancialInstrumentsNotRecordedAtFairValueDetails FAIR VALUE MEASUREMENTS AND FAIR VALUES OF FINANCIAL INSTRUMENTS - Financial Instruments Not Recorded at Fair Value (Details) Details 138 false false R139.htm 99942201 - Disclosure - SEGMENT REPORTING (Details) Sheet http://www.cnbankpa.com/role/DisclosureSegmentReportingDetails SEGMENT REPORTING (Details) Details http://www.cnbankpa.com/role/DisclosureSegmentReportingTables 139 false false All Reports Book All Reports cznc-20251231.xsd cznc-20251231_cal.xml cznc-20251231_def.xml cznc-20251231_lab.xml cznc-20251231_pre.xml cznc-20251231x10k.htm cznc-20251231x10k001.jpg http://fasb.org/srt/2025 http://fasb.org/us-gaap/2025 http://xbrl.sec.gov/cyd/2025 http://xbrl.sec.gov/dei/2025 http://xbrl.sec.gov/ecd/2025 true true