3.26.1 html 441 406 1 false 86 0 false 6 false false R1.htm 995200090 - Document - Document and Entity Information Sheet http://hanoverbank.com/role/DocumentDocumentAndEntityInformation Document and Entity Information Cover 1 false false R2.htm 995200100 - Statement - CONSOLIDATED STATEMENTS OF FINANCIAL CONDITION Sheet http://hanoverbank.com/role/StatementConsolidatedStatementsOfFinancialCondition CONSOLIDATED STATEMENTS OF FINANCIAL CONDITION Statements 2 false false R3.htm 995200105 - Statement - CONSOLIDATED STATEMENTS OF FINANCIAL CONDITION (Parenthetical) Sheet http://hanoverbank.com/role/StatementConsolidatedStatementsOfFinancialConditionParenthetical CONSOLIDATED STATEMENTS OF FINANCIAL CONDITION (Parenthetical) Statements 3 false false R4.htm 995200200 - Statement - CONSOLIDATED STATEMENTS OF INCOME Sheet http://hanoverbank.com/role/StatementConsolidatedStatementsOfIncome CONSOLIDATED STATEMENTS OF INCOME Statements 4 false false R5.htm 995200300 - Statement - CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME Sheet http://hanoverbank.com/role/StatementConsolidatedStatementsOfComprehensiveIncome CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME Statements 5 false false R6.htm 995200305 - Statement - CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical) Sheet http://hanoverbank.com/role/StatementConsolidatedStatementsOfComprehensiveIncomeParenthetical CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical) Statements 6 false false R7.htm 995200400 - Statement - CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY Sheet http://hanoverbank.com/role/StatementConsolidatedStatementsOfChangesInStockholdersEquity CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY Statements 7 false false R8.htm 995200405 - Statement - CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (Parenthetical) Sheet http://hanoverbank.com/role/StatementConsolidatedStatementsOfChangesInStockholdersEquityParenthetical CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (Parenthetical) Statements 8 false false R9.htm 995200500 - Statement - CONSOLIDATED STATEMENTS OF CASH FLOWS Sheet http://hanoverbank.com/role/StatementConsolidatedStatementsOfCashFlows CONSOLIDATED STATEMENTS OF CASH FLOWS Statements 9 false false R10.htm 995210101 - Disclosure - BASIS OF PRESENTATION AND ACCOUNTING POLICIES Sheet http://hanoverbank.com/role/DisclosureBasisOfPresentationAndAccountingPolicies BASIS OF PRESENTATION AND ACCOUNTING POLICIES Notes 10 false false R11.htm 995210201 - Disclosure - EARNINGS PER SHARE Sheet http://hanoverbank.com/role/DisclosureEarningsPerShare EARNINGS PER SHARE Notes 11 false false R12.htm 995210301 - Disclosure - SECURITIES Sheet http://hanoverbank.com/role/DisclosureSecurities SECURITIES Notes 12 false false R13.htm 995210401 - Disclosure - LOANS Sheet http://hanoverbank.com/role/DisclosureLoans LOANS Notes 13 false false R14.htm 995210501 - Disclosure - EQUITY COMPENSATION PLANS Sheet http://hanoverbank.com/role/DisclosureEquityCompensationPlans EQUITY COMPENSATION PLANS Notes 14 false false R15.htm 995210601 - Disclosure - REGULATORY MATTERS Sheet http://hanoverbank.com/role/DisclosureRegulatoryMatters REGULATORY MATTERS Notes 15 false false R16.htm 995210701 - Disclosure - FAIR VALUE Sheet http://hanoverbank.com/role/DisclosureFairValue FAIR VALUE Notes 16 false false R17.htm 995210801 - Disclosure - BORROWINGS Sheet http://hanoverbank.com/role/DisclosureBorrowings BORROWINGS Notes 17 false false R18.htm 995210901 - Disclosure - SUBORDINATED DEBENTURES Sheet http://hanoverbank.com/role/DisclosureSubordinatedDebentures SUBORDINATED DEBENTURES Notes 18 false false R19.htm 995211001 - Disclosure - DERIVATIVES Sheet http://hanoverbank.com/role/DisclosureDerivatives DERIVATIVES Notes 19 false false R20.htm 995211101 - Disclosure - ACCUMULATED OTHER COMPREHENSIVE (LOSS) INCOME Sheet http://hanoverbank.com/role/DisclosureAccumulatedOtherComprehensiveLossIncome ACCUMULATED OTHER COMPREHENSIVE (LOSS) INCOME Notes 20 false false R21.htm 995211201 - Disclosure - SEGMENT INFORMATION Sheet http://hanoverbank.com/role/DisclosureSegmentInformation SEGMENT INFORMATION Notes 21 false false R22.htm 995211301 - Disclosure - SUBSEQUENT EVENTS Sheet http://hanoverbank.com/role/DisclosureSubsequentEvents SUBSEQUENT EVENTS Notes 22 false false R23.htm 995410 - Disclosure - Pay vs Performance Disclosure Sheet http://xbrl.sec.gov/ecd/role/PvpDisclosure Pay vs Performance Disclosure Notes 23 false false R24.htm 995445 - Disclosure - Insider Trading Arrangements Sheet http://xbrl.sec.gov/ecd/role/InsiderTradingArrangements Insider Trading Arrangements Notes 24 false false R25.htm 99920102 - Disclosure - BASIS OF PRESENTATION AND ACCOUNTING POLICIES (Policies) Sheet http://hanoverbank.com/role/DisclosureBasisOfPresentationAndAccountingPoliciesPolicies BASIS OF PRESENTATION AND ACCOUNTING POLICIES (Policies) Policies 25 false false R26.htm 99930203 - Disclosure - EARNINGS PER SHARE (Tables) Sheet http://hanoverbank.com/role/DisclosureEarningsPerShareTables EARNINGS PER SHARE (Tables) Tables http://hanoverbank.com/role/DisclosureEarningsPerShare 26 false false R27.htm 99930303 - Disclosure - SECURITIES (Tables) Sheet http://hanoverbank.com/role/DisclosureSecuritiesTables SECURITIES (Tables) Tables http://hanoverbank.com/role/DisclosureSecurities 27 false false R28.htm 99930403 - Disclosure - LOANS (Tables) Sheet http://hanoverbank.com/role/DisclosureLoansTables LOANS (Tables) Tables http://hanoverbank.com/role/DisclosureLoans 28 false false R29.htm 99930503 - Disclosure - EQUITY COMPENSATION PLANS (Tables) Sheet http://hanoverbank.com/role/DisclosureEquityCompensationPlansTables EQUITY COMPENSATION PLANS (Tables) Tables http://hanoverbank.com/role/DisclosureEquityCompensationPlans 29 false false R30.htm 99930603 - Disclosure - REGULATORY MATTERS (Tables) Sheet http://hanoverbank.com/role/DisclosureRegulatoryMattersTables REGULATORY MATTERS (Tables) Tables http://hanoverbank.com/role/DisclosureRegulatoryMatters 30 false false R31.htm 99930703 - Disclosure - FAIR VALUE (Tables) Sheet http://hanoverbank.com/role/DisclosureFairValueTables FAIR VALUE (Tables) Tables http://hanoverbank.com/role/DisclosureFairValue 31 false false R32.htm 99930803 - Disclosure - BORROWINGS (Tables) Sheet http://hanoverbank.com/role/DisclosureBorrowingsTables BORROWINGS (Tables) Tables http://hanoverbank.com/role/DisclosureBorrowings 32 false false R33.htm 99931003 - Disclosure - DERIVATIVES (Tables) Sheet http://hanoverbank.com/role/DisclosureDerivativesTables DERIVATIVES (Tables) Tables http://hanoverbank.com/role/DisclosureDerivatives 33 false false R34.htm 99931103 - Disclosure - ACCUMULATED OTHER COMPREHENSIVE (LOSS) INCOME (Tables) Sheet http://hanoverbank.com/role/DisclosureAccumulatedOtherComprehensiveLossIncomeTables ACCUMULATED OTHER COMPREHENSIVE (LOSS) INCOME (Tables) Tables http://hanoverbank.com/role/DisclosureAccumulatedOtherComprehensiveLossIncome 34 false false R35.htm 99940101 - Disclosure - BASIS OF PRESENTATION AND ACCOUNTING POLICIES (Details) Sheet http://hanoverbank.com/role/DisclosureBasisOfPresentationAndAccountingPoliciesDetails BASIS OF PRESENTATION AND ACCOUNTING POLICIES (Details) Details http://hanoverbank.com/role/DisclosureBasisOfPresentationAndAccountingPoliciesPolicies 35 false false R36.htm 99940201 - Disclosure - EARNINGS PER SHARE (Details) Sheet http://hanoverbank.com/role/DisclosureEarningsPerShareDetails EARNINGS PER SHARE (Details) Details http://hanoverbank.com/role/DisclosureEarningsPerShareTables 36 false false R37.htm 99940301 - Disclosure - SECURITIES - Investment Securities Available for Sale and Held to Maturity (Details) Sheet http://hanoverbank.com/role/DisclosureSecuritiesInvestmentSecuritiesAvailableForSaleAndHeldToMaturityDetails SECURITIES - Investment Securities Available for Sale and Held to Maturity (Details) Details 37 false false R38.htm 99940302 - Disclosure - SECURITIES - Securities Portfolio Presented by Contractual Maturity (Details) Sheet http://hanoverbank.com/role/DisclosureSecuritiesSecuritiesPortfolioPresentedByContractualMaturityDetails SECURITIES - Securities Portfolio Presented by Contractual Maturity (Details) Details 38 false false R39.htm 99940303 - Disclosure - SECURITIES - Gross Unrealized Losses and Fair Values of Investment Securities (Details) Sheet http://hanoverbank.com/role/DisclosureSecuritiesGrossUnrealizedLossesAndFairValuesOfInvestmentSecuritiesDetails SECURITIES - Gross Unrealized Losses and Fair Values of Investment Securities (Details) Details 39 false false R40.htm 99940401 - Disclosure - LOANS - Major classifications (Details) Sheet http://hanoverbank.com/role/DisclosureLoansMajorClassificationsDetails LOANS - Major classifications (Details) Details 40 false false R41.htm 99940402 - Disclosure - LOANS - Activity in the allowance by portfolio segment (Details) Sheet http://hanoverbank.com/role/DisclosureLoansActivityInAllowanceByPortfolioSegmentDetails LOANS - Activity in the allowance by portfolio segment (Details) Details 41 false false R42.htm 99940403 - Disclosure - LOANS - Allowance for credit losses on unfunded commitments (Details) Sheet http://hanoverbank.com/role/DisclosureLoansAllowanceForCreditLossesOnUnfundedCommitmentsDetails LOANS - Allowance for credit losses on unfunded commitments (Details) Details 42 false false R43.htm 99940404 - Disclosure - LOANS - Provision for credit losses on loans and unfunded commitments (Details) Sheet http://hanoverbank.com/role/DisclosureLoansProvisionForCreditLossesOnLoansAndUnfundedCommitmentsDetails LOANS - Provision for credit losses on loans and unfunded commitments (Details) Details 43 false false R44.htm 99940405 - Disclosure - LOANS - Recorded investment in loans on nonaccrual status and loans past due over 89 days still accruing (Details) Sheet http://hanoverbank.com/role/DisclosureLoansRecordedInvestmentInLoansOnNonaccrualStatusAndLoansPastDueOver89DaysStillAccruingDetails LOANS - Recorded investment in loans on nonaccrual status and loans past due over 89 days still accruing (Details) Details 44 false false R45.htm 99940406 - Disclosure - LOANS - Amortized cost basis and related allowance for credit loss of individually analyzed loans considered to be collateral dependent (Details) Sheet http://hanoverbank.com/role/DisclosureLoansAmortizedCostBasisAndRelatedAllowanceForCreditLossOfIndividuallyAnalyzedLoansConsideredToBeCollateralDependentDetails LOANS - Amortized cost basis and related allowance for credit loss of individually analyzed loans considered to be collateral dependent (Details) Details 45 false false R46.htm 99940407 - Disclosure - LOANS - Aging of Recorded Investment in Past Due and Non-accrual Loans by Portfolio Segment (Details) Sheet http://hanoverbank.com/role/DisclosureLoansAgingOfRecordedInvestmentInPastDueAndNonAccrualLoansByPortfolioSegmentDetails LOANS - Aging of Recorded Investment in Past Due and Non-accrual Loans by Portfolio Segment (Details) Details 46 false false R47.htm 99940408 - Disclosure - LOANS - Modifications (Details) Sheet http://hanoverbank.com/role/DisclosureLoansModificationsDetails LOANS - Modifications (Details) Details 47 false false R48.htm 99940409 - Disclosure - LOANS - Company's Loans by Year of Origination and Internally Assigned Credit Risk and Gross Charge-offs (Details) Sheet http://hanoverbank.com/role/DisclosureLoansCompanySLoansByYearOfOriginationAndInternallyAssignedCreditRiskAndGrossChargeOffsDetails LOANS - Company's Loans by Year of Origination and Internally Assigned Credit Risk and Gross Charge-offs (Details) Details 48 false false R49.htm 99940501 - Disclosure - EQUITY COMPENSATION PLANS - 2021 and 2018 Equity Compensation Plans (Details) Sheet http://hanoverbank.com/role/DisclosureEquityCompensationPlans2021And2018EquityCompensationPlansDetails EQUITY COMPENSATION PLANS - 2021 and 2018 Equity Compensation Plans (Details) Details 49 false false R50.htm 99940502 - Disclosure - EQUITY COMPENSATION PLANS - Stock Options (Details) Sheet http://hanoverbank.com/role/DisclosureEquityCompensationPlansStockOptionsDetails EQUITY COMPENSATION PLANS - Stock Options (Details) Details 50 false false R51.htm 99940503 - Disclosure - EQUITY COMPENSATION PLANS - Stock Option Plan (Details) Sheet http://hanoverbank.com/role/DisclosureEquityCompensationPlansStockOptionPlanDetails EQUITY COMPENSATION PLANS - Stock Option Plan (Details) Details 51 false false R52.htm 99940504 - Disclosure - EQUITY COMPENSATION PLANS - Restricted Stock (Details) Sheet http://hanoverbank.com/role/DisclosureEquityCompensationPlansRestrictedStockDetails EQUITY COMPENSATION PLANS - Restricted Stock (Details) Details 52 false false R53.htm 99940601 - Disclosure - REGULATORY MATTERS (Details) Sheet http://hanoverbank.com/role/DisclosureRegulatoryMattersDetails REGULATORY MATTERS (Details) Details http://hanoverbank.com/role/DisclosureRegulatoryMattersTables 53 false false R54.htm 99940701 - Disclosure - FAIR VALUE - Assets Measured at Fair Value on Recurring Basis (Details) Sheet http://hanoverbank.com/role/DisclosureFairValueAssetsMeasuredAtFairValueOnRecurringBasisDetails FAIR VALUE - Assets Measured at Fair Value on Recurring Basis (Details) Details 54 false false R55.htm 99940702 - Disclosure - FAIR VALUE - Significant Inputs Utilized in Cash Flow Models (Details) Sheet http://hanoverbank.com/role/DisclosureFairValueSignificantInputsUtilizedInCashFlowModelsDetails FAIR VALUE - Significant Inputs Utilized in Cash Flow Models (Details) Details 55 false false R56.htm 99940703 - Disclosure - FAIR VALUE - Changes in Loan Servicing Rights (Details) Sheet http://hanoverbank.com/role/DisclosureFairValueChangesInLoanServicingRightsDetails FAIR VALUE - Changes in Loan Servicing Rights (Details) Details 56 false false R57.htm 99940704 - Disclosure - FAIR VALUE - Assets Measured at Fair Value on Non-recurring Basis (Details) Sheet http://hanoverbank.com/role/DisclosureFairValueAssetsMeasuredAtFairValueOnNonRecurringBasisDetails FAIR VALUE - Assets Measured at Fair Value on Non-recurring Basis (Details) Details 57 false false R58.htm 99940705 - Disclosure - FAIR VALUE - Quantitative information measured at fair value on non-nonrecurring basis (Details) Sheet http://hanoverbank.com/role/DisclosureFairValueQuantitativeInformationMeasuredAtFairValueOnNonNonrecurringBasisDetails FAIR VALUE - Quantitative information measured at fair value on non-nonrecurring basis (Details) Details 58 false false R59.htm 99940706 - Disclosure - FAIR VALUE - Carrying Amount and Fair Value of Financial Instruments (Details) Sheet http://hanoverbank.com/role/DisclosureFairValueCarryingAmountAndFairValueOfFinancialInstrumentsDetails FAIR VALUE - Carrying Amount and Fair Value of Financial Instruments (Details) Details 59 false false R60.htm 99940801 - Disclosure - BORROWINGS - Federal Home Loan Bank Advances (Details) Sheet http://hanoverbank.com/role/DisclosureBorrowingsFederalHomeLoanBankAdvancesDetails BORROWINGS - Federal Home Loan Bank Advances (Details) Details 60 false false R61.htm 99940802 - Disclosure - BORROWINGS - FHLB Advances Contractual Maturities and Weighted Average Interest Rates (Details) Sheet http://hanoverbank.com/role/DisclosureBorrowingsFhlbAdvancesContractualMaturitiesAndWeightedAverageInterestRatesDetails BORROWINGS - FHLB Advances Contractual Maturities and Weighted Average Interest Rates (Details) Details 61 false false R62.htm 99940803 - Disclosure - BORROWINGS - Federal Reserve Borrowings and Correspondent Bank Borrowings (Details) Sheet http://hanoverbank.com/role/DisclosureBorrowingsFederalReserveBorrowingsAndCorrespondentBankBorrowingsDetails BORROWINGS - Federal Reserve Borrowings and Correspondent Bank Borrowings (Details) Details 62 false false R63.htm 99940901 - Disclosure - SUBORDINATED DEBENTURES (Details) Sheet http://hanoverbank.com/role/DisclosureSubordinatedDebenturesDetails SUBORDINATED DEBENTURES (Details) Details http://hanoverbank.com/role/DisclosureSubordinatedDebentures 63 false false R64.htm 99941001 - Disclosure - DERIVATIVES - Cash flow hedges included in the consolidated statements of financial condition (Details) Sheet http://hanoverbank.com/role/DisclosureDerivativesCashFlowHedgesIncludedInConsolidatedStatementsOfFinancialConditionDetails DERIVATIVES - Cash flow hedges included in the consolidated statements of financial condition (Details) Details 64 false false R65.htm 99941002 - Disclosure - DERIVATIVES - Additional Information (Details) Sheet http://hanoverbank.com/role/DisclosureDerivativesAdditionalInformationDetails DERIVATIVES - Additional Information (Details) Details 65 false false R66.htm 99941003 - Disclosure - DERIVATIVES - Gains (losses) in accumulated other comprehensive income and the consolidated statements, cash flow derivative instruments (Details) Sheet http://hanoverbank.com/role/DisclosureDerivativesGainsLossesInAccumulatedOtherComprehensiveIncomeAndConsolidatedStatementsCashFlowDerivativeInstrumentsDetails DERIVATIVES - Gains (losses) in accumulated other comprehensive income and the consolidated statements, cash flow derivative instruments (Details) Details 66 false false R67.htm 99941004 - Disclosure - DERIVATIVES - Fair value hedges on the Consolidated Statements of Income (Details) Sheet http://hanoverbank.com/role/DisclosureDerivativesFairValueHedgesOnConsolidatedStatementsOfIncomeDetails DERIVATIVES - Fair value hedges on the Consolidated Statements of Income (Details) Details 67 false false R68.htm 99941005 - Disclosure - DERIVATIVES - Cumulative basis adjustment for fair value hedges (Details) Sheet http://hanoverbank.com/role/DisclosureDerivativesCumulativeBasisAdjustmentForFairValueHedgesDetails DERIVATIVES - Cumulative basis adjustment for fair value hedges (Details) Details 68 false false R69.htm 99941006 - Disclosure - DERIVATIVES - Credit-Risk-Related Contingent Features (Details) Sheet http://hanoverbank.com/role/DisclosureDerivativesCreditRiskRelatedContingentFeaturesDetails DERIVATIVES - Credit-Risk-Related Contingent Features (Details) Details 69 false false R70.htm 99941101 - Disclosure - ACCUMULATED OTHER COMPREHENSIVE (LOSS) INCOME - Changes in Accumulated Other Comprehensive (loss) income by Component, Net of Tax (Details) Sheet http://hanoverbank.com/role/DisclosureAccumulatedOtherComprehensiveLossIncomeChangesInAccumulatedOtherComprehensiveLossIncomeByComponentNetOfTaxDetails ACCUMULATED OTHER COMPREHENSIVE (LOSS) INCOME - Changes in Accumulated Other Comprehensive (loss) income by Component, Net of Tax (Details) Details http://hanoverbank.com/role/DisclosureAccumulatedOtherComprehensiveLossIncomeTables 70 false false R71.htm 99941102 - Disclosure - ACCUMULATED OTHER COMPREHENSIVE (LOSS) INCOME - Reclassification Out of Accumulated Other Comprehensive Income (Details) Sheet http://hanoverbank.com/role/DisclosureAccumulatedOtherComprehensiveLossIncomeReclassificationOutOfAccumulatedOtherComprehensiveIncomeDetails ACCUMULATED OTHER COMPREHENSIVE (LOSS) INCOME - Reclassification Out of Accumulated Other Comprehensive Income (Details) Details http://hanoverbank.com/role/DisclosureAccumulatedOtherComprehensiveLossIncomeTables 71 false false R72.htm 99941201 - Disclosure - SEGMENT INFORMATION (Details) Sheet http://hanoverbank.com/role/DisclosureSegmentInformationDetails SEGMENT INFORMATION (Details) Details http://hanoverbank.com/role/DisclosureSegmentInformation 72 false false R73.htm 99941301 - Disclosure - SUBSEQUENT EVENTS (Details) Sheet http://hanoverbank.com/role/DisclosureSubsequentEventsDetails SUBSEQUENT EVENTS (Details) Details http://hanoverbank.com/role/DisclosureSubsequentEvents 73 false false All Reports Book All Reports hnvr-20260331.xsd hnvr-20260331_cal.xml hnvr-20260331_def.xml hnvr-20260331_lab.xml hnvr-20260331_pre.xml hnvr-20260331x10q.htm http://fasb.org/us-gaap/2025 http://xbrl.sec.gov/dei/2025 http://xbrl.sec.gov/ecd/2025 true true