$GCBC
GREENE COUNTY BANCORP INC Stock $gcbc

$gcbc Overview Financials Valuation SEC Filings Company Website

2024 Q3 Form 10-K Financial Statement

#000114036124040469 Filed on September 06, 2024

Income Statement

Concept	2024 Q3	2024 Q2	2024
Revenue	$27.77M		$103.7M
YoY Change	12.55%		22.5%
Cost Of Revenue
YoY Change
Gross Profit
YoY Change
Gross Profit Margin
Selling, General & Admin
YoY Change
% of Gross Profit
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$261.0K	$243.0K	$928.0K
YoY Change	18.64%	8.48%	6.54%
% of Gross Profit
Operating Expenses
YoY Change
Operating Profit
YoY Change
Interest Expense
YoY Change
% of Operating Profit
Other Income/Expense, Net
YoY Change
Pretax Income	$6.689M	$6.830M	$26.82M
YoY Change	-10.05%	-5.1%	-25.14%
Income Tax	$428.0K	$98.00K	$2.050M
% Of Pretax Income	6.4%	1.43%	7.64%
Net Earnings	$6.261M	$6.732M	$24.77M
YoY Change	-3.22%	4.21%	-19.54%
Net Earnings / Revenue	22.55%		23.89%
Basic Earnings Per Share	$0.37		$1.45
Diluted Earnings Per Share	$0.37	$0.40	$1.46
COMMON SHARES
Basic Shares Outstanding	17.03M	17.03M	17.03M
Diluted Shares Outstanding	17.03M		17.03M

Balance Sheet

Concept	2024 Q3	2024 Q2	2024
SHORT-TERM ASSETS
Cash & Short-Term Investments
YoY Change
Cash & Equivalents	$213.5M	$190.4M
Short-Term Investments
Other Short-Term Assets
YoY Change
Inventory
Prepaid Expenses
Receivables
Other Receivables
Total Short-Term Assets
YoY Change
LONG-TERM ASSETS
Property, Plant & Equipment	$15.50M	$15.61M	$15.61M
YoY Change	1.41%	3.85%	3.85%
Goodwill
YoY Change
Intangibles
YoY Change
Long-Term Investments
YoY Change
Other Assets
YoY Change
Total Long-Term Assets
YoY Change
TOTAL ASSETS
Total Short-Term Assets
Total Long-Term Assets
Total Assets	$2.875B	$2.826B	$2.826B
YoY Change	6.93%	4.73%	4.73%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable
YoY Change
Accrued Expenses	$29.94M	$31.43M	$31.43M
YoY Change	1.15%	10.88%	10.88%
Deferred Revenue
YoY Change
Short-Term Debt
YoY Change
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$29.94M	$31.43M	$31.43M
YoY Change	1.15%	10.88%	10.88%
LONG-TERM LIABILITIES
Long-Term Debt	$49.73M	$49.68M	$49.68M
YoY Change	0.46%	0.38%	0.38%
Other Long-Term Liabilities
YoY Change
Total Long-Term Liabilities	$49.73M	$49.68M	$49.68M
YoY Change	0.46%	0.38%	0.38%
TOTAL LIABILITIES
Total Short-Term Liabilities	$29.94M	$31.43M	$31.43M
Total Long-Term Liabilities	$49.73M	$49.68M	$49.68M
Total Liabilities	$2.658B	$2.620B	$2.620B
YoY Change	6.16%	4.17%	4.17%
SHAREHOLDERS EQUITY
Retained Earnings	$219.5M	$214.7M
YoY Change	10.66%	10.85%
Common Stock	$1.722M	$1.722M
YoY Change	0.0%	0.0%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$216.3M	$206.0M	$206.0M
YoY Change
Total Liabilities & Shareholders Equity	$2.875B	$2.826B	$2.826B
YoY Change	6.93%	4.73%	4.73%

Cashflow Statement

Concept	2024 Q3	2024 Q2	2024
OPERATING ACTIVITIES
Net Income	$6.261M	$6.732M	$24.77M
YoY Change	-3.22%	4.21%	-19.54%
Depreciation, Depletion And Amortization	$261.0K	$243.0K	$928.0K
YoY Change	18.64%	8.48%	6.54%
Cash From Operating Activities	$2.150M	$11.06M	$24.91M
YoY Change	-65.64%	6.57%	-11.39%
INVESTING ACTIVITIES
Capital Expenditures	$153.0K	$198.0K	$1.506M
YoY Change	-67.72%	-72.5%	-2.02%
Acquisitions
YoY Change
Other Investing Activities	-$17.37M	-$21.08M	-$127.7M
YoY Change	-70.22%	-147.73%	-5911.15%
Cash From Investing Activities	-$17.52M	-$21.28M	-$129.2M
YoY Change	-70.19%	-148.98%	-19651.44%
FINANCING ACTIVITIES
Cash Dividend Paid	$1.533M		$3.240M
YoY Change	12.56%		47.88%
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net	$4.375M
YoY Change
Cash From Financing Activities	38.44M	-55.21M	98.28M
YoY Change	-381.27%	54.61%	-0.39%
NET CHANGE
Cash From Operating Activities	2.150M	11.06M	24.91M
Cash From Investing Activities	-17.52M	-21.28M	-129.2M
Cash From Financing Activities	38.44M	-55.21M	98.28M
Net Change In Cash	23.07M	-65.43M	-6.050M
YoY Change	-134.86%	-461.02%	-104.75%
FREE CASH FLOW
Cash From Operating Activities	$2.150M	$11.06M	$24.91M
Capital Expenditures	$153.0K	$198.0K	$1.506M
Free Cash Flow	$1.997M	$10.87M	$23.40M
YoY Change	-65.47%	12.46%	-11.93%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value
CY2024Q2	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	350001000
CY2023Q2	us-gaap	Federal Home Loan Bank Stock FederalHomeLoanBankStock	1682000
CY2024Q2	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	19244000
CY2023Q2	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	21212000
CY2024Q2	us-gaap	Notes Receivable Net NotesReceivableNet	1480229000
CY2023Q2	us-gaap	Notes Receivable Net NotesReceivableNet	1387654000
CY2024Q2	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	15606000
CY2023Q2	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	15028000
CY2024Q2	us-gaap	Bank Owned Life Insurance BankOwnedLifeInsurance	57249000
CY2023Q2	us-gaap	Bank Owned Life Insurance BankOwnedLifeInsurance	55063000
CY2024Q2	us-gaap	Interest Receivable InterestReceivable	14269000
CY2023Q2	us-gaap	Interest Receivable InterestReceivable	12249000
CY2024Q2	us-gaap	Real Estate Acquired Through Foreclosure RealEstateAcquiredThroughForeclosure	0
CY2023Q2	us-gaap	Real Estate Acquired Through Foreclosure RealEstateAcquiredThroughForeclosure	302000
CY2024Q2	us-gaap	Prepaid Expense And Other Assets PrepaidExpenseAndOtherAssets	17230000
CY2023Q2	us-gaap	Prepaid Expense And Other Assets PrepaidExpenseAndOtherAssets	17482000
CY2024Q2	us-gaap	Assets Assets	2825788000
CY2023Q2	us-gaap	Assets Assets	2698283000
CY2024Q2	us-gaap	Noninterest Bearing Deposit Liabilities Domestic NoninterestBearingDepositLiabilitiesDomestic	125442000
CY2023Q2	us-gaap	Noninterest Bearing Deposit Liabilities Domestic NoninterestBearingDepositLiabilitiesDomestic	159039000
CY2024Q2	us-gaap	Interest Bearing Deposit Liabilities Domestic InterestBearingDepositLiabilitiesDomestic	2263780000
CY2023Q2	us-gaap	Interest Bearing Deposit Liabilities Domestic InterestBearingDepositLiabilitiesDomestic	2278122000
CY2024Q2	us-gaap	Deposits Deposits	2389222000
CY2023Q2	us-gaap	Deposits Deposits	2437161000
CY2024Q2	us-gaap	Federal Home Loan Bank Advances Maturities Summary Due Within One Year Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryDueWithinOneYearOfBalanceSheetDate	115300000
CY2023Q2	us-gaap	Federal Home Loan Bank Advances Maturities Summary Due Within One Year Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryDueWithinOneYearOfBalanceSheetDate	0
CY2024Q2	us-gaap	Subordinated Debt SubordinatedDebt	49681000
CY2023Q2	us-gaap	Subordinated Debt SubordinatedDebt	49495000
CY2024Q2	us-gaap	Accrued Liabilities And Other Liabilities AccruedLiabilitiesAndOtherLiabilities	31429000
CY2023Q2	us-gaap	Accrued Liabilities And Other Liabilities AccruedLiabilitiesAndOtherLiabilities	28344000
CY2024Q2	us-gaap	Liabilities Liabilities	2619788000
CY2023Q2	us-gaap	Liabilities Liabilities	2515000000
CY2023Q2	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	1000000
CY2024Q2	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.1
CY2023Q2	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	36000000
CY2024Q2	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	36000000
CY2023Q2	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	17222680
CY2024Q2	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	17222680
CY2023Q2	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	17026828
CY2024Q2	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	17026828
CY2024Q2	us-gaap	Common Stock Value CommonStockValue	1722000
CY2023Q2	us-gaap	Common Stock Value CommonStockValue	1722000
CY2024Q2	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	10156000
CY2023Q2	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	10156000
CY2024Q2	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	214740000
CY2023Q2	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	193721000
CY2023Q2	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-21408000
CY2024Q2	us-gaap	Stockholders Equity StockholdersEquity	206000000
CY2023Q2	us-gaap	Stockholders Equity StockholdersEquity	183283000
CY2024Q2	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	2825788000
CY2023Q2	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	2698283000
CY2024	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	71540000
CY2023	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	60049000
CY2023	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	61218000
CY2024	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	50213000
CY2023	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	62289000
CY2024	gcbc	Service Charges On Deposit Accounts ServiceChargesOnDepositAccounts	4640000
CY2023	gcbc	Service Charges On Deposit Accounts ServiceChargesOnDepositAccounts	4713000
CY2024	gcbc	Debit Card Fees DebitCardFees	4438000
CY2023	gcbc	Debit Card Fees DebitCardFees	4512000
CY2024	us-gaap	Investment Banking Advisory Brokerage And Underwriting Fees And Commissions InvestmentBankingAdvisoryBrokerageAndUnderwritingFeesAndCommissions	1157000
CY2023	us-gaap	Investment Banking Advisory Brokerage And Underwriting Fees And Commissions InvestmentBankingAdvisoryBrokerageAndUnderwritingFeesAndCommissions	781000
CY2024	gcbc	E Commerce Fees ECommerceFees	116000
CY2023	gcbc	E Commerce Fees ECommerceFees	110000
CY2024	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	2183000
CY2023	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	1369000
CY2024	us-gaap	Other Operating Income OtherOperatingIncome	1374000
CY2023	us-gaap	Other Operating Income OtherOperatingIncome	912000
CY2024	us-gaap	Noninterest Income NoninterestIncome	13908000
CY2023	us-gaap	Noninterest Income NoninterestIncome	12146000
CY2024	us-gaap	Labor And Related Expense LaborAndRelatedExpense	23836000
CY2023	us-gaap	Labor And Related Expense LaborAndRelatedExpense	23418000
CY2024	us-gaap	Occupancy Net OccupancyNet	2446000
CY2023	us-gaap	Occupancy Net OccupancyNet	2333000
CY2024	us-gaap	Equipment Expense EquipmentExpense	710000
CY2023	us-gaap	Equipment Expense EquipmentExpense	699000
CY2024	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	2386000
CY2023	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	2869000
CY2024	gcbc	Computer Software Supplies And Support ComputerSoftwareSuppliesAndSupport	1577000
CY2023	gcbc	Computer Software Supplies And Support ComputerSoftwareSuppliesAndSupport	1653000
CY2024	us-gaap	Advertising Expense AdvertisingExpense	445000
CY2023	us-gaap	Advertising Expense AdvertisingExpense	498000
CY2024	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	1289000
CY2023	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	1085000
CY2024	us-gaap	Professional Fees ProfessionalFees	1516000
CY2023	us-gaap	Professional Fees ProfessionalFees	3024000
CY2024	us-gaap	Other Noninterest Expense OtherNoninterestExpense	3097000
CY2023	us-gaap	Other Noninterest Expense OtherNoninterestExpense	3029000
CY2023	us-gaap	Noninterest Expense NoninterestExpense	38608000
CY2024	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	26819000
CY2023	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	35827000
CY2024	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	2050000
CY2023	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	5042000
CY2024	us-gaap	Net Income Loss NetIncomeLoss	24769000
CY2024	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.45
CY2023	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.81
CY2024	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	17026828
CY2023	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	17026828
CY2024	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.45
CY2023	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.81
CY2024	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	17026828
CY2023	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	17026828
CY2024	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.32
CY2023	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.28
CY2023Q2	us-gaap	Certificates Of Deposit At Carrying Value CertificatesOfDepositAtCarryingValue	4576000
CY2023Q2	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	281133000
CY2024Q2	us-gaap	Debt Securities Held To Maturity Amortized Cost After Allowance For Credit Loss DebtSecuritiesHeldToMaturityAmortizedCostAfterAllowanceForCreditLoss	690354000
CY2023Q2	us-gaap	Debt Securities Held To Maturity Amortized Cost After Allowance For Credit Loss DebtSecuritiesHeldToMaturityAmortizedCostAfterAllowanceForCreditLoss	726363000
CY2024Q2	us-gaap	Federal Home Loan Bank Stock FederalHomeLoanBankStock	7296000
CY2024Q2	us-gaap	Notes Receivable Gross NotesReceivableGross	1499473000
CY2023Q2	us-gaap	Notes Receivable Gross NotesReceivableGross	1408866000
CY2024Q2	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	1000000
CY2023Q2	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0
CY2024Q2	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0
CY2024Q2	us-gaap	Preferred Stock Value PreferredStockValue	0
CY2023Q2	us-gaap	Preferred Stock Value PreferredStockValue	0
CY2023Q2	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.1
CY2024Q2	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-19710000
CY2023Q2	us-gaap	Treasury Stock Common Shares TreasuryStockCommonShares	195852
CY2024Q2	us-gaap	Treasury Stock Common Shares TreasuryStockCommonShares	195852
CY2024Q2	us-gaap	Treasury Stock Common Value TreasuryStockCommonValue	908000
CY2023Q2	us-gaap	Treasury Stock Common Value TreasuryStockCommonValue	908000
CY2024	gcbc	Interest Bearing Deposits And Federal Funds Sold InterestBearingDepositsAndFederalFundsSold	4023000
CY2023	gcbc	Interest Bearing Deposits And Federal Funds Sold InterestBearingDepositsAndFederalFundsSold	1592000
CY2024	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	103664000
CY2023	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	84625000
CY2024	us-gaap	Interest Expense Deposits InterestExpenseDeposits	49714000
CY2024	us-gaap	Debt Securities Available For Sale Realized Gain Loss DebtSecuritiesAvailableForSaleRealizedGainLoss	0
CY2023	us-gaap	Debt Securities Available For Sale Realized Gain Loss DebtSecuritiesAvailableForSaleRealizedGainLoss	-251000
CY2023	us-gaap	Net Income Loss NetIncomeLoss	30785000
CY2024	dei	Amendment Flag AmendmentFlag	false
CY2024	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--06-30
CY2024	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2024
CY2024	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2024	dei	Entity Central Index Key EntityCentralIndexKey	0001070524
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CY2024Q2	us-gaap	Debt Securities Held To Maturity Accrued Interest After Allowance For Credit Loss Statement Of Financial Position Extensible List DebtSecuritiesHeldToMaturityAccruedInterestAfterAllowanceForCreditLossStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2024#InterestReceivable
CY2023Q2	us-gaap	Debt Securities Held To Maturity Accrued Interest After Allowance For Credit Loss Statement Of Financial Position Extensible List DebtSecuritiesHeldToMaturityAccruedInterestAfterAllowanceForCreditLossStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2024#InterestReceivable
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CY2024Q2	us-gaap	Operating Lease Right Of Use Asset Statement Of Financial Position Extensible List OperatingLeaseRightOfUseAssetStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2024#PrepaidExpenseAndOtherAssets
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CY2024	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	No
CY2024	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2024	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2024	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2024	dei	Auditor Firm AuditorFirmId	1884
CY2024	dei	Document Type DocumentType	10-K
CY2024	dei	Document Annual Report DocumentAnnualReport	true
CY2024	dei	Document Period End Date DocumentPeriodEndDate	2024-06-30
CY2024	dei	Document Transition Report DocumentTransitionReport	false
CY2024	dei	Entity File Number EntityFileNumber	0-25165
CY2024	dei	Entity Registrant Name EntityRegistrantName	GREENE COUNTY BANCORP, INC.
CY2024	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	X1
CY2024	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	14-1809721
CY2024	dei	Entity Address Address Line1 EntityAddressAddressLine1	302 Main Street
CY2024	dei	Entity Address City Or Town EntityAddressCityOrTown	Catskill
CY2024	dei	Entity Address State Or Province EntityAddressStateOrProvince	NY
CY2024	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	12414
CY2024	dei	City Area Code CityAreaCode	518
CY2024	dei	Local Phone Number LocalPhoneNumber	943-2600
CY2024	dei	Security12b Title Security12bTitle	Common Stock, $0.10 par value
CY2024	dei	Trading Symbol TradingSymbol	GCBC
CY2024	dei	Security Exchange Name SecurityExchangeName	NASDAQ
CY2024	dei	Entity Filer Category EntityFilerCategory	Non-accelerated Filer
CY2024	dei	Entity Small Business EntitySmallBusiness	true
CY2024	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2024	dei	Icfr Auditor Attestation Flag IcfrAuditorAttestationFlag	true
CY2024	dei	Document Fin Stmt Error Correction Flag DocumentFinStmtErrorCorrectionFlag	false
CY2024	dei	Entity Shell Company EntityShellCompany	false
CY2023Q4	dei	Entity Public Float EntityPublicFloat	179230000
CY2024Q3	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	17026828
CY2024	dei	Auditor Name AuditorName	Bonadio & Co., LLP
CY2024	dei	Auditor Location AuditorLocation	Pittsford, New York
CY2024	dei	Auditor Name AuditorName	Bonadio & Co., LLP
CY2024	dei	Auditor Location AuditorLocation	Pittsford, New York
CY2024Q2	us-gaap	Cash And Due From Banks CashAndDueFromBanks	13897000
CY2023Q2	us-gaap	Cash And Due From Banks CashAndDueFromBanks	15305000
CY2024Q2	us-gaap	Interest Bearing Deposits In Banks InterestBearingDepositsInBanks	176498000
CY2023Q2	us-gaap	Interest Bearing Deposits In Banks InterestBearingDepositsInBanks	181140000
CY2024Q2	us-gaap	Cash Cash Equivalents And Federal Funds Sold CashCashEquivalentsAndFederalFundsSold	190395000
CY2023Q2	us-gaap	Cash Cash Equivalents And Federal Funds Sold CashCashEquivalentsAndFederalFundsSold	196445000
CY2024Q2	us-gaap	Certificates Of Deposit At Carrying Value CertificatesOfDepositAtCarryingValue	2831000
CY2024Q2	us-gaap	Debt Securities Held To Maturity Allowance For Credit Loss DebtSecuritiesHeldToMaturityAllowanceForCreditLoss	483000
CY2024Q2	us-gaap	Equity Securities Fv Ni Current And Noncurrent EquitySecuritiesFvNiCurrentAndNoncurrent	328000
CY2023Q2	us-gaap	Equity Securities Fv Ni Current And Noncurrent EquitySecuritiesFvNiCurrentAndNoncurrent	306000
CY2024Q2	us-gaap	Federal Home Loan Bank Advances Long Term FederalHomeLoanBankAdvancesLongTerm	34156000
CY2023Q2	us-gaap	Federal Home Loan Bank Advances Long Term FederalHomeLoanBankAdvancesLongTerm	0
CY2024	us-gaap	Interest Income Securities Tax Exempt InterestIncomeSecuritiesTaxExempt	17594000
CY2023	us-gaap	Interest Income Securities Tax Exempt InterestIncomeSecuritiesTaxExempt	14385000
CY2024	us-gaap	Interest Income Securities Taxable InterestIncomeSecuritiesTaxable	10507000
CY2023	us-gaap	Interest Income Securities Taxable InterestIncomeSecuritiesTaxable	8599000
CY2023	us-gaap	Interest Expense Deposits InterestExpenseDeposits	20055000
CY2024	us-gaap	Interest Expense Borrowings InterestExpenseBorrowings	2971000
CY2023	us-gaap	Interest Expense Borrowings InterestExpenseBorrowings	3352000
CY2024	us-gaap	Interest Expense Operating InterestExpenseOperating	52685000
CY2023	us-gaap	Interest Expense Operating InterestExpenseOperating	23407000
CY2024	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	50979000
CY2024	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	766000
CY2023	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	-1071000
CY2024	us-gaap	Noninterest Expense NoninterestExpense	37302000
CY2024	us-gaap	Net Income Loss NetIncomeLoss	24769000
CY2023	us-gaap	Net Income Loss NetIncomeLoss	30785000
CY2024	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	1842000
CY2023	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	-4708000
CY2024	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	493000
CY2023	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-1261000
CY2024	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	1349000
CY2023	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-3447000
CY2024	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	0
CY2023	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	-251000
CY2024	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	0
CY2023	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	-67000
CY2024	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	0
CY2023	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	-184000
CY2024	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Net Unamortized Gain Loss Arising During Period Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax	399000
CY2023	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Net Unamortized Gain Loss Arising During Period Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax	218000
CY2024	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax	107000
CY2023	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax	58000
CY2024	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax	292000
CY2023	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax	160000
CY2024	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax	-77000
CY2023	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax	-106000
CY2024	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax	-20000
CY2023	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax	-28000
CY2024	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax	-57000
CY2023	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax	-78000
CY2024	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	1698000
CY2023	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-3025000
CY2024	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	26467000
CY2023	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	27760000
CY2022Q2	us-gaap	Stockholders Equity StockholdersEquity	157714000
CY2023	us-gaap	Dividends Common Stock DividendsCommonStock	2191000
CY2023	us-gaap	Net Income Loss NetIncomeLoss	30785000
CY2023	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-3025000
CY2023Q2	us-gaap	Stockholders Equity StockholdersEquity	183283000
CY2024	us-gaap	Dividends Common Stock DividendsCommonStock	3240000
CY2024	us-gaap	Net Income Loss NetIncomeLoss	24769000
CY2024	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	1698000
CY2024Q2	us-gaap	Stockholders Equity StockholdersEquity	206000000
CY2024	us-gaap	Net Income Loss NetIncomeLoss	24769000
CY2023	us-gaap	Net Income Loss NetIncomeLoss	30785000
CY2024	us-gaap	Depreciation Nonproduction DepreciationNonproduction	928000
CY2023	us-gaap	Depreciation Nonproduction DepreciationNonproduction	871000
CY2024	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-74000
CY2023	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-149000
CY2024	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-297000
CY2023	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-2418000
CY2024	us-gaap	Amortization Of Deferred Loan Origination Fees Net AmortizationOfDeferredLoanOriginationFeesNet	-392000
CY2023	us-gaap	Amortization Of Deferred Loan Origination Fees Net AmortizationOfDeferredLoanOriginationFeesNet	-259000
CY2024	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	186000
CY2023	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	185000
CY2024	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	766000
CY2023	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	-1071000
CY2024	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	2183000
CY2023	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	1369000
CY2024	us-gaap	Debt Securities Available For Sale Realized Gain Loss DebtSecuritiesAvailableForSaleRealizedGainLoss	0
CY2023	us-gaap	Debt Securities Available For Sale Realized Gain Loss DebtSecuritiesAvailableForSaleRealizedGainLoss	-251000
CY2024	us-gaap	Equity Securities Fv Ni Gain Loss EquitySecuritiesFvNiGainLoss	22000
CY2023	us-gaap	Equity Securities Fv Ni Gain Loss EquitySecuritiesFvNiGainLoss	33000
CY2024	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	60000
CY2023	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	-26000
CY2024	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	322000
CY2023	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	-1121000
CY2024	us-gaap	Increase Decrease In Interest And Dividends Receivable IncreaseDecreaseInInterestAndDividendsReceivable	2020000
CY2023	us-gaap	Increase Decrease In Interest And Dividends Receivable IncreaseDecreaseInInterestAndDividendsReceivable	3332000
CY2024	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	430000
CY2023	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	-133000
CY2024	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	2037000
CY2023	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	256000
CY2024	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	24908000
CY2023	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	28109000
CY2024	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	182232000
CY2023	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	262884000
CY2024	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	0
CY2023	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	1675000
CY2024	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	279953000
CY2023	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	154365000
CY2024	gcbc	Securities Available For Sale Principal Payments On Securities SecuritiesAvailableForSalePrincipalPaymentsOnSecurities	31162000
CY2023	gcbc	Securities Available For Sale Principal Payments On Securities SecuritiesAvailableForSalePrincipalPaymentsOnSecurities	11205000
CY2024	us-gaap	Proceeds From Sale And Maturity Of Held To Maturity Securities ProceedsFromSaleAndMaturityOfHeldToMaturitySecurities	68423000
CY2023	us-gaap	Proceeds From Sale And Maturity Of Held To Maturity Securities ProceedsFromSaleAndMaturityOfHeldToMaturitySecurities	70275000
CY2024	us-gaap	Payments To Acquire Held To Maturity Securities PaymentsToAcquireHeldToMaturitySecurities	49633000
CY2023	us-gaap	Payments To Acquire Held To Maturity Securities PaymentsToAcquireHeldToMaturitySecurities	57596000
CY2024	gcbc	Securities Held To Maturities Principal Payments On Securities SecuritiesHeldToMaturitiesPrincipalPaymentsOnSecurities	15987000
CY2023	gcbc	Securities Held To Maturities Principal Payments On Securities SecuritiesHeldToMaturitiesPrincipalPaymentsOnSecurities	21236000
CY2024	us-gaap	Payments For Proceeds From Federal Home Loan Bank Stock PaymentsForProceedsFromFederalHomeLoanBankStock	5614000
CY2023	us-gaap	Payments For Proceeds From Federal Home Loan Bank Stock PaymentsForProceedsFromFederalHomeLoanBankStock	-5121000
CY2024	us-gaap	Payments To Acquire Restricted Certificates Of Deposit PaymentsToAcquireRestrictedCertificatesOfDeposit	0
CY2023	us-gaap	Payments To Acquire Restricted Certificates Of Deposit PaymentsToAcquireRestrictedCertificatesOfDeposit	1225000
CY2024	gcbc	Proceeds From Maturities Of Long Term Certificates Of Deposit ProceedsFromMaturitiesOfLongTermCertificatesOfDeposit	1730000
CY2023	gcbc	Proceeds From Maturities Of Long Term Certificates Of Deposit ProceedsFromMaturitiesOfLongTermCertificatesOfDeposit	735000
CY2024	us-gaap	Proceeds From Life Insurance Policies ProceedsFromLifeInsurancePolicies	23100000
CY2023	us-gaap	Proceeds From Life Insurance Policies ProceedsFromLifeInsurancePolicies	0
CY2024	us-gaap	Payments To Acquire Life Insurance Policies PaymentsToAcquireLifeInsurancePolicies	23104000
CY2023	us-gaap	Payments To Acquire Life Insurance Policies PaymentsToAcquireLifeInsurancePolicies	0
CY2024	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	92421000
CY2023	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	157949000
CY2024	us-gaap	Proceeds From Sale Of Foreclosed Assets ProceedsFromSaleOfForeclosedAssets	362000
CY2023	us-gaap	Proceeds From Sale Of Foreclosed Assets ProceedsFromSaleOfForeclosedAssets	202000
CY2024	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	1506000
CY2023	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	1537000
CY2024	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-129235000
CY2023	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	661000
CY2024	gcbc	Proceeds From Payments Of Short Term Fhl Bank Borrowings Financing Activities ProceedsFromPaymentsOfShortTermFHLBankBorrowingsFinancingActivities	-115300000
CY2023	gcbc	Proceeds From Payments Of Short Term Fhl Bank Borrowings Financing Activities ProceedsFromPaymentsOfShortTermFHLBankBorrowingsFinancingActivities	123700000
CY2024	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	34156000
CY2023	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	0
CY2024	us-gaap	Payments Of Dividends PaymentsOfDividends	3240000
CY2023	us-gaap	Payments Of Dividends PaymentsOfDividends	2191000
CY2024	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	-47939000
CY2023	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	224557000
CY2024	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	98277000
CY2023	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	98666000
CY2024	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	-6050000
CY2023	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	127436000
CY2023Q2	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	196445000
CY2022Q2	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	69009000
CY2024Q2	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	190395000
CY2023Q2	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	196445000
CY2024	us-gaap	Transfer To Other Real Estate TransferToOtherRealEstate	0
CY2023	us-gaap	Transfer To Other Real Estate TransferToOtherRealEstate	462000
CY2024	us-gaap	Interest Paid Net InterestPaidNet	52070000
CY2023	us-gaap	Interest Paid Net InterestPaidNet	23074000
CY2024	us-gaap	Income Taxes Paid IncomeTaxesPaid	1802000
CY2023	us-gaap	Income Taxes Paid IncomeTaxesPaid	6312000
CY2024Q2	us-gaap	Number Of Stores NumberOfStores	18
CY2024	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	0
CY2024	gcbc	Threshold Period Of Delinquency After Which Loan Is Placed On Nonaccrual Status ThresholdPeriodOfDelinquencyAfterWhichLoanIsPlacedOnNonaccrualStatus	P90D
CY2024Q2	gcbc	Financing Receivable Threshold Principal Amount Of Nonaccrual Loans Evaluated Individually For Impairment FinancingReceivableThresholdPrincipalAmountOfNonaccrualLoansEvaluatedIndividuallyForImpairment	250000
CY2024Q2	srt	Stock Repurchase Program Number Of Shares Authorized To Be Repurchased StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased	400000
CY2024Q2	gcbc	Stock Repurchase Program Shares Repurchased StockRepurchaseProgramSharesRepurchased	48800
CY2024Q2	srt	Stock Repurchase Program Number Of Shares Authorized To Be Repurchased StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased	400000
CY2024	gcbc	Impairment Charges On Debt Securities Available For Sale ImpairmentChargesOnDebtSecuritiesAvailableForSale	0
CY2023	gcbc	Impairment Charges On Debt Securities Available For Sale ImpairmentChargesOnDebtSecuritiesAvailableForSale	0
CY2024	us-gaap	Advertising Expense AdvertisingExpense	445000
CY2023	us-gaap	Advertising Expense AdvertisingExpense	498000
CY2024Q2	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	0
CY2023Q2	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	0
CY2024	gcbc	Number Of Categories Utilized Under Risk Management Approach Of Diversified Investing NumberOfCategoriesUtilizedUnderRiskManagementApproachOfDiversifiedInvesting	3
CY2024Q2	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	376179000
CY2024Q2	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	910000
CY2024Q2	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	27088000
CY2024Q2	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	350001000
CY2023Q2	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	309153000
CY2023Q2	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	670000
CY2023Q2	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	28690000
CY2023Q2	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	281133000
CY2024Q2	us-gaap	Debt Securities Available For Sale Accrued Interest After Allowance For Credit Loss DebtSecuritiesAvailableForSaleAccruedInterestAfterAllowanceForCreditLoss	4000000
CY2023Q2	us-gaap	Debt Securities Available For Sale Accrued Interest After Allowance For Credit Loss DebtSecuritiesAvailableForSaleAccruedInterestAfterAllowanceForCreditLoss	2900000
CY2024Q2	us-gaap	Debt Securities Available For Sale Allowance For Credit Loss DebtSecuritiesAvailableForSaleAllowanceForCreditLoss	0
CY2024Q2	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	690837000
CY2024Q2	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Gain HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain	4604000
CY2024Q2	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Loss HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss	65200000
CY2024Q2	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	630241000
CY2024Q2	us-gaap	Debt Securities Held To Maturity Allowance For Credit Loss DebtSecuritiesHeldToMaturityAllowanceForCreditLoss	483000
CY2024Q2	us-gaap	Debt Securities Held To Maturity Amortized Cost After Allowance For Credit Loss DebtSecuritiesHeldToMaturityAmortizedCostAfterAllowanceForCreditLoss	690354000
CY2023Q2	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	726363000
CY2023Q2	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Gain HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain	5178000
CY2023Q2	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Loss HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss	60475000
CY2023Q2	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	671066000
CY2023Q2	us-gaap	Debt Securities Held To Maturity Allowance For Credit Loss DebtSecuritiesHeldToMaturityAllowanceForCreditLoss	0
CY2023Q2	us-gaap	Debt Securities Held To Maturity Amortized Cost After Allowance For Credit Loss DebtSecuritiesHeldToMaturityAmortizedCostAfterAllowanceForCreditLoss	726363000
CY2024Q2	us-gaap	Debt Securities Held To Maturity Accrued Interest After Allowance For Credit Loss DebtSecuritiesHeldToMaturityAccruedInterestAfterAllowanceForCreditLoss	4100000
CY2023Q2	us-gaap	Debt Securities Held To Maturity Accrued Interest After Allowance For Credit Loss DebtSecuritiesHeldToMaturityAccruedInterestAfterAllowanceForCreditLoss	3900000
CY2023Q2	us-gaap	Debt Securities Held To Maturity Allowance For Credit Loss DebtSecuritiesHeldToMaturityAllowanceForCreditLoss	0
CY2024	us-gaap	Debt Securities Held To Maturity Credit Loss Expense Reversal DebtSecuritiesHeldToMaturityCreditLossExpenseReversal	-20000
CY2024Q2	us-gaap	Debt Securities Held To Maturity Allowance For Credit Loss DebtSecuritiesHeldToMaturityAllowanceForCreditLoss	483000
CY2023Q2	us-gaap	Debt Securities Held To Maturity Allowance For Credit Loss DebtSecuritiesHeldToMaturityAllowanceForCreditLoss	0
CY2024Q2	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	26487000
CY2024Q2	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	223000
CY2024Q2	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Number Of Positions DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsNumberOfPositions	3
CY2024Q2	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	139017000
CY2024Q2	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	26865000
CY2024Q2	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Number Of Positions DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerNumberOfPositions	84
CY2024Q2	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	165504000
CY2024Q2	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	27088000
CY2024Q2	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Number Of Positions DebtSecuritiesAvailableForSaleUnrealizedLossPositionNumberOfPositions	87
CY2024Q2	gcbc	Debt Securities Held To Maturity Continuous Unrealized Loss Positions Less Than12 Months Fair Value DebtSecuritiesHeldToMaturityContinuousUnrealizedLossPositionsLessThan12MonthsFairValue	32215000
CY2024Q2	gcbc	Debt Securities Held To Maturity Continuous Unrealized Loss Positions Less Than12 Months Accumulated Loss DebtSecuritiesHeldToMaturityContinuousUnrealizedLossPositionsLessThan12MonthsAccumulatedLoss	474000
CY2024Q2	gcbc	Held To Maturity Securities In Unrealized Loss Positions Qualitative Disclosure Number Of Positions Less Than One Year HeldToMaturitySecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositionsLessThanOneYear	294
CY2024Q2	gcbc	Debt Securities Held To Maturity Continuous Unrealized Loss Positions12 Months Or Longer Fair Value DebtSecuritiesHeldToMaturityContinuousUnrealizedLossPositions12MonthsOrLongerFairValue	476309000
CY2024Q2	gcbc	Debt Securities Held To Maturity Continuous Unrealized Loss Positions12 Months Or Longer Accumulated Loss DebtSecuritiesHeldToMaturityContinuousUnrealizedLossPositions12MonthsOrLongerAccumulatedLoss	64726000
CY2024Q2	gcbc	Held To Maturity Securities In Unrealized Loss Positions Qualitative Disclosure Number Of Positions Greater Than Or Equal To One Year HeldToMaturitySecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositionsGreaterThanOrEqualToOneYear	2148
CY2024Q2	gcbc	Debt Securities Held To Maturity Unrealized Loss Positions Fair Value DebtSecuritiesHeldToMaturityUnrealizedLossPositionsFairValue	508524000
CY2024Q2	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Loss HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss	65200000
CY2024Q2	gcbc	Held To Maturity Securities In Unrealized Loss Positions Qualitative Disclosure Number Of Security Positions HeldToMaturitySecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfSecurityPositions	2442
CY2024Q2	gcbc	Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value SecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	58702000
CY2024Q2	gcbc	Securities Continuous Unrealized Loss Position Accumulated Loss SecuritiesContinuousUnrealizedLossPositionAccumulatedLoss	697000
CY2024Q2	gcbc	Number Of Securities Unrealized Loss Position Less Than Twelve Months NumberOfSecuritiesUnrealizedLossPositionLessThanTwelveMonths	297
CY2024Q2	gcbc	Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value SecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	615326000
CY2024Q2	gcbc	Securities Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss SecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	91591000
CY2024Q2	gcbc	Number Of Securities Unrealized Loss Position Twelve Months Or Longer NumberOfSecuritiesUnrealizedLossPositionTwelveMonthsOrLonger	2232
CY2024Q2	gcbc	Securities Continuous Unrealized Loss Positions Fair Value SecuritiesContinuousUnrealizedLossPositionsFairValue	674028000
CY2024Q2	gcbc	Securities Continuous Unrealized Loss Positions Accumulated Loss SecuritiesContinuousUnrealizedLossPositionsAccumulatedLoss	92288000
CY2024Q2	gcbc	Number Of Securities Unrealized Loss Position NumberOfSecuritiesUnrealizedLossPosition	2529
CY2023Q2	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	6268000
CY2023Q2	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	308000
CY2023Q2	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Number Of Positions DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsNumberOfPositions	12
CY2023Q2	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	136936000
CY2023Q2	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	28382000
CY2023Q2	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Number Of Positions DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerNumberOfPositions	78
CY2023Q2	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	143204000
CY2023Q2	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	28690000
CY2023Q2	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Number Of Positions DebtSecuritiesAvailableForSaleUnrealizedLossPositionNumberOfPositions	90
CY2023Q2	gcbc	Debt Securities Held To Maturity Continuous Unrealized Loss Positions Less Than12 Months Fair Value DebtSecuritiesHeldToMaturityContinuousUnrealizedLossPositionsLessThan12MonthsFairValue	57992000
CY2023Q2	gcbc	Debt Securities Held To Maturity Continuous Unrealized Loss Positions Less Than12 Months Accumulated Loss DebtSecuritiesHeldToMaturityContinuousUnrealizedLossPositionsLessThan12MonthsAccumulatedLoss	2897000
CY2023Q2	gcbc	Held To Maturity Securities In Unrealized Loss Positions Qualitative Disclosure Number Of Positions Less Than One Year HeldToMaturitySecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositionsLessThanOneYear	471
CY2023Q2	gcbc	Debt Securities Held To Maturity Continuous Unrealized Loss Positions12 Months Or Longer Fair Value DebtSecuritiesHeldToMaturityContinuousUnrealizedLossPositions12MonthsOrLongerFairValue	495655000
CY2023Q2	gcbc	Debt Securities Held To Maturity Continuous Unrealized Loss Positions12 Months Or Longer Accumulated Loss DebtSecuritiesHeldToMaturityContinuousUnrealizedLossPositions12MonthsOrLongerAccumulatedLoss	57578000
CY2023Q2	gcbc	Held To Maturity Securities In Unrealized Loss Positions Qualitative Disclosure Number Of Positions Greater Than Or Equal To One Year HeldToMaturitySecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositionsGreaterThanOrEqualToOneYear	2108
CY2023Q2	gcbc	Debt Securities Held To Maturity Unrealized Loss Positions Fair Value DebtSecuritiesHeldToMaturityUnrealizedLossPositionsFairValue	553647000
CY2023Q2	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Loss HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss	60475000
CY2023Q2	gcbc	Held To Maturity Securities In Unrealized Loss Positions Qualitative Disclosure Number Of Security Positions HeldToMaturitySecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfSecurityPositions	2579
CY2023Q2	gcbc	Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value SecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	64260000
CY2023Q2	gcbc	Securities Continuous Unrealized Loss Position Accumulated Loss SecuritiesContinuousUnrealizedLossPositionAccumulatedLoss	3205000
CY2023Q2	gcbc	Number Of Securities Unrealized Loss Position Less Than Twelve Months NumberOfSecuritiesUnrealizedLossPositionLessThanTwelveMonths	483
CY2023Q2	gcbc	Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value SecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	632591000
CY2023Q2	gcbc	Securities Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss SecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	85960000
CY2023Q2	gcbc	Number Of Securities Unrealized Loss Position Twelve Months Or Longer NumberOfSecuritiesUnrealizedLossPositionTwelveMonthsOrLonger	2186
CY2023Q2	gcbc	Securities Continuous Unrealized Loss Positions Fair Value SecuritiesContinuousUnrealizedLossPositionsFairValue	696851000
CY2023Q2	gcbc	Securities Continuous Unrealized Loss Positions Accumulated Loss SecuritiesContinuousUnrealizedLossPositionsAccumulatedLoss	89165000
CY2023Q2	gcbc	Number Of Securities Unrealized Loss Position NumberOfSecuritiesUnrealizedLossPosition	2669
CY2023	gcbc	Available For Sale Securities Transfers To Held To Maturity AvailableForSaleSecuritiesTransfersToHeldToMaturity	0
CY2024	gcbc	Available For Sale Securities Transfers To Held To Maturity AvailableForSaleSecuritiesTransfersToHeldToMaturity	0
CY2024	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	0
CY2024	us-gaap	Debt Securities Available For Sale Realized Gain Loss DebtSecuritiesAvailableForSaleRealizedGainLoss	0
CY2023	us-gaap	Debt Securities Available For Sale Realized Gain Loss DebtSecuritiesAvailableForSaleRealizedGainLoss	-251000
CY2023	gcbc	Number Of Debt Securities Available For Sale NumberOfDebtSecuritiesAvailableForSale	1
CY2024Q2	us-gaap	Available For Sale Securities Debt Maturities Within One Year Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost	195839000
CY2024Q2	us-gaap	Available For Sale Securities Debt Maturities Within One Year Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue	196431000
CY2024Q2	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost	39264000
CY2024Q2	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	36207000
CY2024Q2	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost	8913000
CY2024Q2	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	7295000
CY2024Q2	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost	1500000
CY2024Q2	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue	1193000
CY2024Q2	us-gaap	Available For Sale Securities Debt Maturities Single Maturity Date Amortized Cost Basis AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDateAmortizedCostBasis	245516000
CY2024Q2	us-gaap	Available For Sale Securities Debt Maturities Single Maturity Date AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDate	241126000
CY2024Q2	us-gaap	Available For Sale Securities Debt Maturities Without Single Maturity Date Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateAmortizedCost	130663000
CY2024Q2	us-gaap	Available For Sale Securities Debt Maturities Without Single Maturity Date Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateFairValue	108875000
CY2024Q2	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	376179000
CY2024Q2	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	350001000
CY2024Q2	us-gaap	Held To Maturity Securities Debt Maturities Within One Year Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesWithinOneYearNetCarryingAmount	56992000
CY2024Q2	us-gaap	Held To Maturity Securities Debt Maturities Within One Year Fair Value HeldToMaturitySecuritiesDebtMaturitiesWithinOneYearFairValue	56196000
CY2024Q2	us-gaap	Held To Maturity Securities Debt Maturities After One Through Five Years Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesAfterOneThroughFiveYearsNetCarryingAmount	156431000
CY2024Q2	us-gaap	Held To Maturity Securities Debt Maturities After One Through Five Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	151325000
CY2024Q2	us-gaap	Held To Maturity Securities Debt Maturities After Five Through Ten Years Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesAfterFiveThroughTenYearsNetCarryingAmount	171167000
CY2024Q2	us-gaap	Held To Maturity Securities Debt Maturities After Five Through Ten Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	153881000
CY2024Q2	us-gaap	Held To Maturity Securities Debt Maturities After Ten Years Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesAfterTenYearsNetCarryingAmount	114851000
CY2024Q2	us-gaap	Held To Maturity Securities Debt Maturities After Ten Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesAfterTenYearsFairValue	98103000
CY2024Q2	us-gaap	Held To Maturity Securities Debt Maturities Single Maturity Date Amortized Cost Basis HeldToMaturitySecuritiesDebtMaturitiesSingleMaturityDateAmortizedCostBasis	499441000
CY2024Q2	us-gaap	Held To Maturity Securities Debt Maturities Single Maturity Date Fair Value HeldToMaturitySecuritiesDebtMaturitiesSingleMaturityDateFairValue	459505000
CY2024Q2	us-gaap	Held To Maturity Securities Debt Maturities Without Single Maturity Date Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesWithoutSingleMaturityDateNetCarryingAmount	191396000
CY2024Q2	us-gaap	Held To Maturity Securities Debt Maturities Without Single Maturity Date Fair Value HeldToMaturitySecuritiesDebtMaturitiesWithoutSingleMaturityDateFairValue	170736000
CY2024Q2	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	690837000
CY2024Q2	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	630241000
CY2024Q2	us-gaap	Debt Securities Available For Sale And Held To Maturity Amortized Cost Before Allowance For Credit Loss DebtSecuritiesAvailableForSaleAndHeldToMaturityAmortizedCostBeforeAllowanceForCreditLoss	1067016000
CY2024Q2	us-gaap	Debt Securities Available For Sale And Held To Maturity Fair Value DebtSecuritiesAvailableForSaleAndHeldToMaturityFairValue	980242000
CY2024Q2	us-gaap	Notes Receivable Gross NotesReceivableGross	1499473000
CY2024Q2	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	19244000
CY2024Q2	us-gaap	Notes Receivable Net NotesReceivableNet	1480229000
CY2024Q2	gcbc	Unamortized Loan Commitments And Origination Fees And Unamortized Discounts Or Premiums UnamortizedLoanCommitmentsAndOriginationFeesAndUnamortizedDiscountsOrPremiums	-42000
CY2024Q2	us-gaap	Financing Receivable Accrued Interest After Allowance For Credit Loss FinancingReceivableAccruedInterestAfterAllowanceForCreditLoss	6200000
CY2024Q2	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	3700000
CY2024Q2	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	3700000
CY2023Q2	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	5500000
CY2023Q2	us-gaap	Mortgage Loans In Process Of Foreclosure Amount MortgageLoansInProcessOfForeclosureAmount	2000
CY2023Q2	gcbc	Nonaccrual Loans With Recent History Of Delinquency Greater Than90 Days NonaccrualLoansWithRecentHistoryOfDelinquencyGreaterThan90Days	3100000
CY2024Q2	us-gaap	Notes Receivable Gross NotesReceivableGross	1499473000
CY2024Q2	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	3728000
CY2023Q2	us-gaap	Financing Receivable Recorded Investment90 Days Past Due And Still Accruing FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing	0
CY2023Q2	us-gaap	Financing Receivable Recorded Investment90 Days Past Due And Still Accruing FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing	0
CY2024Q2	gcbc	Financing Receivable Threshold Principal Amount Of Nonaccrual Loans Evaluated Individually For Impairment FinancingReceivableThresholdPrincipalAmountOfNonaccrualLoansEvaluatedIndividuallyForImpairment	250000
CY2023Q2	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	21212000
CY2024	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	1633000
CY2024	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	211000
CY2024	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	786000
CY2024Q2	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	19244000
CY2024Q2	gcbc	Financing Receivable Individually Evaluated Amortized Cost Basis FinancingReceivableIndividuallyEvaluatedAmortizedCostBasis	1400000
CY2024Q2	gcbc	Financing Receivable Individually Evaluated Allowance For Credit Losses FinancingReceivableIndividuallyEvaluatedAllowanceForCreditLosses	662000
CY2024Q2	gcbc	Collateral Dependent Financing Receivable Collateral Value CollateralDependentFinancingReceivableCollateralValue	662000
CY2024Q2	us-gaap	Real Estate Acquired Through Foreclosure RealEstateAcquiredThroughForeclosure	0
CY2023Q2	us-gaap	Real Estate Acquired Through Foreclosure RealEstateAcquiredThroughForeclosure	302000
CY2023Q2	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	1408791000
CY2023Q2	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	21212000
CY2023Q2	us-gaap	Unamortized Loan Commitment And Origination Fees And Unamortized Discounts Or Premiums UnamortizedLoanCommitmentAndOriginationFeesAndUnamortizedDiscountsOrPremiums	75000
CY2023Q2	us-gaap	Notes Receivable Net NotesReceivableNet	1387654000
CY2023Q2	us-gaap	Financing Receivable Accrued Interest After Allowance For Credit Loss FinancingReceivableAccruedInterestAfterAllowanceForCreditLoss	5500000
CY2023Q2	us-gaap	Loans And Leases Receivable Gross Carrying Amount Covered LoansAndLeasesReceivableGrossCarryingAmountCovered	1408791000
CY2023Q2	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	1408791000
CY2023Q2	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	5458000
CY2023Q2	us-gaap	Financing Receivable Threshold Period Past Due Writeoff FinancingReceivableThresholdPeriodPastDueWriteoff	P90D
CY2023Q2	us-gaap	Impaired Financing Receivable With No Related Allowance Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment	2872000
CY2023Q2	us-gaap	Impaired Financing Receivable With No Related Allowance Unpaid Principal Balance ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance	2872000
CY2023	us-gaap	Impaired Financing Receivable With No Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment	1972000
CY2023	us-gaap	Impaired Financing Receivable With No Related Allowance Interest Income Cash Basis Method ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeCashBasisMethod	70000
CY2023Q2	us-gaap	Impaired Financing Receivable With Related Allowance Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment	7435000
CY2023Q2	us-gaap	Impaired Financing Receivable With Related Allowance Unpaid Principal Balance ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance	7435000
CY2023Q2	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	2013000
CY2023	us-gaap	Impaired Financing Receivable With Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment	8239000
CY2023	us-gaap	Impaired Financing Receivable With Related Allowance Interest Income Cash Basis Method ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeCashBasisMethod	257000
CY2023Q2	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	10307000
CY2023Q2	us-gaap	Impaired Financing Receivable Unpaid Principal Balance ImpairedFinancingReceivableUnpaidPrincipalBalance	10307000
CY2023Q2	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	2013000
CY2023	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	10211000
CY2023	us-gaap	Impaired Financing Receivable Interest Income Cash Basis Method ImpairedFinancingReceivableInterestIncomeCashBasisMethod	327000
CY2022	us-gaap	Financing Receivable Modifications Subsequent Default Number Of Contracts1 FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1	0
CY2023	us-gaap	Financing Receivable Modifications Subsequent Default Number Of Contracts1 FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1	0
CY2022Q2	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	22761000
CY2023	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	664000
CY2023	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	186000
CY2023	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	-1071000
CY2023Q2	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	21212000
CY2023Q2	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	2013000
CY2023Q2	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	19199000
CY2023Q2	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	10307000
CY2023Q2	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	1398484000
CY2024Q2	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	11886000
CY2023Q2	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	13828000
CY2024Q2	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	15606000
CY2023Q2	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	15028000
CY2024	us-gaap	Depreciation Nonproduction DepreciationNonproduction	928000
CY2023	us-gaap	Depreciation Nonproduction DepreciationNonproduction	871000
CY2024Q2	us-gaap	Noninterest Bearing Deposit Liabilities Domestic NoninterestBearingDepositLiabilitiesDomestic	125442000
CY2023Q2	us-gaap	Noninterest Bearing Deposit Liabilities Domestic NoninterestBearingDepositLiabilitiesDomestic	159039000
CY2024Q2	us-gaap	Interest Bearing Domestic Deposit Certificates Of Deposits InterestBearingDomesticDepositCertificatesOfDeposits	138493000
CY2023Q2	us-gaap	Interest Bearing Domestic Deposit Certificates Of Deposits InterestBearingDomesticDepositCertificatesOfDeposits	128077000
CY2024Q2	us-gaap	Interest Bearing Domestic Deposit Savings InterestBearingDomesticDepositSavings	252362000
CY2023Q2	us-gaap	Interest Bearing Domestic Deposit Savings InterestBearingDomesticDepositSavings	299038000
CY2024Q2	us-gaap	Interest Bearing Domestic Deposit Money Market InterestBearingDomesticDepositMoneyMarket	113266000
CY2023Q2	us-gaap	Interest Bearing Domestic Deposit Money Market InterestBearingDomesticDepositMoneyMarket	115029000
CY2024Q2	us-gaap	Interest Bearing Domestic Deposit Negotiable Order Of Withdrawal Now InterestBearingDomesticDepositNegotiableOrderOfWithdrawalNOW	1759659000
CY2023Q2	us-gaap	Interest Bearing Domestic Deposit Negotiable Order Of Withdrawal Now InterestBearingDomesticDepositNegotiableOrderOfWithdrawalNOW	1735978000
CY2024Q2	us-gaap	Deposits Deposits	2389222000
CY2023Q2	us-gaap	Deposits Deposits	2437161000
CY2024Q2	us-gaap	Advance Payments By Borrowers For Taxes And Insurance AdvancePaymentsByBorrowersForTaxesAndInsurance	10000000
CY2023Q2	us-gaap	Advance Payments By Borrowers For Taxes And Insurance AdvancePaymentsByBorrowersForTaxesAndInsurance	10000000
CY2024	gcbc	Maximum Percentage Of Combined Broker Deposits MaximumPercentageOfCombinedBrokerDeposits	0.30
CY2024Q2	gcbc	Maximum Amount Of Combined Broker Deposits MaximumAmountOfCombinedBrokerDeposits	716800000
CY2024Q2	gcbc	Contractual Maturities Interest Bearing Domestic Deposit Brokered Over12 Months ContractualMaturitiesInterestBearingDomesticDepositBrokeredOver12Months	0
CY2023Q2	gcbc	Contractual Maturities Interest Bearing Domestic Deposit Brokered Over12 Months ContractualMaturitiesInterestBearingDomesticDepositBrokeredOver12Months	60000000
CY2024Q2	us-gaap	Related Party Deposit Liabilities RelatedPartyDepositLiabilities	13300000
CY2023Q2	us-gaap	Related Party Deposit Liabilities RelatedPartyDepositLiabilities	66400000
CY2024Q2	gcbc	Contractual Maturities Time Deposits Less Than250000 Three Months Or Less ContractualMaturitiesTimeDepositsLessThan250000ThreeMonthsOrLess	29496000
CY2024Q2	gcbc	Contractual Maturities Time Deposits Less Than250000 Three Months Through Six Months ContractualMaturitiesTimeDepositsLessThan250000ThreeMonthsThroughSixMonths	45086000
CY2024Q2	gcbc	Contractual Maturities Time Deposits Less Than250000 Six Months Through12 Months ContractualMaturitiesTimeDepositsLessThan250000SixMonthsThrough12Months	19243000
CY2024Q2	gcbc	Contractual Maturities Time Deposits Less Than250000 After12 Months ContractualMaturitiesTimeDepositsLessThan250000After12Months	6272000
CY2024Q2	gcbc	Time Deposits Less Than250000 TimeDepositsLessThan250000	100097000
CY2024Q2	gcbc	Contractual Maturities Time Deposits250000 Or More Three Months Or Less ContractualMaturitiesTimeDeposits250000OrMoreThreeMonthsOrLess	11863000
CY2024Q2	gcbc	Contractual Maturities Time Deposits250000 Or More Three Months Through Six Months ContractualMaturitiesTimeDeposits250000OrMoreThreeMonthsThroughSixMonths	19470000
CY2024Q2	gcbc	Contractual Maturities Time Deposits250000 Or More6 Months Through12 Months ContractualMaturitiesTimeDeposits250000OrMore6MonthsThrough12Months	2666000
CY2024Q2	gcbc	Contractual Maturities Time Deposits250000 Or More After12 Months ContractualMaturitiesTimeDeposits250000OrMoreAfter12Months	4397000
CY2024Q2	gcbc	Time Deposits250000 Or More TimeDeposits250000OrMore	38396000
CY2024Q2	gcbc	Time Deposit Maturities Three Months Or Less TimeDepositMaturitiesThreeMonthsOrLess	41359000
CY2024Q2	gcbc	Time Deposit Maturities Three Months Through Six Months TimeDepositMaturitiesThreeMonthsThroughSixMonths	64556000
CY2024Q2	gcbc	Time Deposit Maturities Six Months Through12 Months TimeDepositMaturitiesSixMonthsThrough12Months	21909000
CY2024Q2	gcbc	Time Deposit Maturities After12 Months TimeDepositMaturitiesAfter12Months	10669000
CY2024Q2	us-gaap	Time Deposits TimeDeposits	138493000
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CY2024Q2	us-gaap	Time Deposits TimeDeposits	138493000
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CY2023	us-gaap	Defined Benefit Plan Benefit Obligation Benefits Paid DefinedBenefitPlanBenefitObligationBenefitsPaid	240000
CY2024Q2	us-gaap	Defined Benefit Plan Benefit Obligation DefinedBenefitPlanBenefitObligation	4119000
CY2023Q2	us-gaap	Defined Benefit Plan Benefit Obligation DefinedBenefitPlanBenefitObligation	4351000
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CY2023	us-gaap	Defined Benefit Plan Actual Return On Plan Assets DefinedBenefitPlanActualReturnOnPlanAssets	212000
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CY2024	us-gaap	Defined Benefit Plan Plan Assets Benefits Paid DefinedBenefitPlanPlanAssetsBenefitsPaid	241000
CY2023	us-gaap	Defined Benefit Plan Plan Assets Benefits Paid DefinedBenefitPlanPlanAssetsBenefitsPaid	240000
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CY2023Q2	us-gaap	Defined Benefit Plan Fair Value Of Plan Assets DefinedBenefitPlanFairValueOfPlanAssets	4474000
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CY2023	us-gaap	Defined Benefit Plan Amortization Of Gains Losses DefinedBenefitPlanAmortizationOfGainsLosses	-106000
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CY2023	us-gaap	Defined Benefit Plan Recognized Net Gain Loss Due To Settlements1 DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1	0
CY2024	us-gaap	Defined Benefit Plan Net Periodic Benefit Cost DefinedBenefitPlanNetPeriodicBenefitCost	65000
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CY2023Q2	us-gaap	Defined Benefit Plan Accumulated Benefit Obligation DefinedBenefitPlanAccumulatedBenefitObligation	4400000
CY2024	us-gaap	Defined Benefit Plan Amounts Recognized In Other Comprehensive Income Loss Net Gain Loss Before Tax DefinedBenefitPlanAmountsRecognizedInOtherComprehensiveIncomeLossNetGainLossBeforeTax	-476000
CY2023	us-gaap	Defined Benefit Plan Amounts Recognized In Other Comprehensive Income Loss Net Gain Loss Before Tax DefinedBenefitPlanAmountsRecognizedInOtherComprehensiveIncomeLossNetGainLossBeforeTax	-324000
CY2024	us-gaap	Other Comprehensive Income Finalization Of Pension And Non Pension Postretirement Plan Valuation Tax OtherComprehensiveIncomeFinalizationOfPensionAndNonPensionPostretirementPlanValuationTax	-127000
CY2023	us-gaap	Other Comprehensive Income Finalization Of Pension And Non Pension Postretirement Plan Valuation Tax OtherComprehensiveIncomeFinalizationOfPensionAndNonPensionPostretirementPlanValuationTax	-86000
CY2024	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent	349000
CY2023	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent	238000
CY2024Q2	us-gaap	Defined Benefit Plan Amounts Recognized In Balance Sheet DefinedBenefitPlanAmountsRecognizedInBalanceSheet	-535000
CY2023Q2	us-gaap	Defined Benefit Plan Amounts Recognized In Balance Sheet DefinedBenefitPlanAmountsRecognizedInBalanceSheet	-123000
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CY2023Q2	us-gaap	Accumulated Other Comprehensive Income Loss Defined Benefit Pension And Other Postretirement Plans Net Of Tax AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax	877000
CY2024Q2	us-gaap	Defined Benefit Plan Assumptions Used Calculating Benefit Obligation Discount Rate DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate	0.053
CY2023Q2	us-gaap	Defined Benefit Plan Assumptions Used Calculating Benefit Obligation Discount Rate DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate	0.049
CY2024	gcbc	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Amortization Period DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostAmortizationPeriod	P11Y
CY2023	gcbc	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Amortization Period DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostAmortizationPeriod	P11Y
CY2024	us-gaap	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Discount Rate DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate	0.049
CY2023	us-gaap	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Discount Rate DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate	0.0443
CY2024	us-gaap	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Expected Long Term Return On Assets DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets	0.05
CY2023	us-gaap	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Expected Long Term Return On Assets DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets	0.05
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CY2024Q2	us-gaap	Defined Benefit Plan Expected Future Benefit Payments Next Twelve Months DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths	248000
CY2024Q2	us-gaap	Defined Benefit Plan Expected Future Benefit Payments Year Two DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo	245000
CY2024Q2	us-gaap	Defined Benefit Plan Expected Future Benefit Payments Year Three DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree	243000
CY2024Q2	us-gaap	Defined Benefit Plan Expected Future Benefit Payments Year Four DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour	239000
CY2024Q2	us-gaap	Defined Benefit Plan Expected Future Benefit Payments Year Five DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive	242000
CY2024Q2	us-gaap	Defined Benefit Plan Expected Future Benefit Payments Five Fiscal Years Thereafter DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter	1369000
CY2024	gcbc	Required Service Period To Participate In Defined Contribution Plan RequiredServicePeriodToParticipateInDefinedContributionPlan	P3M
CY2024	gcbc	Equal Matching Of Employer Contribution Dollar For Dollar EqualMatchingOfEmployerContributionDollarForDollar	0.03
CY2024	gcbc	Percentage Of Employer Contribution For Next Specified Percentage PercentageOfEmployerContributionForNextSpecifiedPercentage	0.50
CY2024	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	520000
CY2023	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	483000
CY2024	gcbc	Payment Authorized For Purchase Of Additional Shares For Esop PaymentAuthorizedForPurchaseOfAdditionalSharesForEsop	180000
CY2023	gcbc	Payment Authorized For Purchase Of Additional Shares For Esop PaymentAuthorizedForPurchaseOfAdditionalSharesForEsop	170000
CY2024	us-gaap	Employee Stock Ownership Plan Esop Compensation Expense EmployeeStockOwnershipPlanESOPCompensationExpense	186000
CY2023	us-gaap	Employee Stock Ownership Plan Esop Compensation Expense EmployeeStockOwnershipPlanESOPCompensationExpense	164000
CY2023Q2	gcbc	Employee Stock Ownership Plan Esop Number Of Unearned Shares EmployeeStockOwnershipPlanESOPNumberOfUnearnedShares	0
CY2024Q2	gcbc	Employee Stock Ownership Plan Esop Number Of Unearned Shares EmployeeStockOwnershipPlanESOPNumberOfUnearnedShares	0
CY2024	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	0
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CY2024Q2	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Other DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsOther	5345000
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CY2023Q2	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	1148000
CY2024Q2	gcbc	Deferred Tax Liabilities Deferred Loan Costs DeferredTaxLiabilitiesDeferredLoanCosts	1261000
CY2023Q2	gcbc	Deferred Tax Liabilities Deferred Loan Costs DeferredTaxLiabilitiesDeferredLoanCosts	1225000
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CY2024Q2	us-gaap	Deferred Tax Liabilities Leasing Arrangements DeferredTaxLiabilitiesLeasingArrangements	554000
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CY2024Q2	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	0
CY2023Q2	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	0
CY2024Q2	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	6459000
CY2023Q2	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	6117000
CY2024Q2	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	12089000
CY2023Q2	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	12634000
CY2024Q2	us-gaap	Liability For Uncertain Tax Positions Current LiabilityForUncertainTaxPositionsCurrent	0
CY2023Q2	us-gaap	Liability For Uncertain Tax Positions Current LiabilityForUncertainTaxPositionsCurrent	0
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CY2024Q2	us-gaap	Unused Commitments To Extend Credit UnusedCommitmentsToExtendCredit	207896000
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CY2024	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	251000
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CY2024Q2	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	372000
CY2024Q2	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	228000
CY2024Q2	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	313000
CY2024Q2	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	2344000
CY2024Q2	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	185000
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Files In Submission

Name	View Source	Status
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$GCBC
GREENE COUNTY BANCORP INC Stock $gcbc

2024 Q3 Form 10-K Financial Statement

#000114036124040469 Filed on September 06, 2024

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$GCBC GREENE COUNTY BANCORP INC Stock $gcbc

2024 Q3 Form 10-K Financial Statement

#000114036124040469 Filed on September 06, 2024

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$GCBC
GREENE COUNTY BANCORP INC Stock $gcbc