$GCBC
GREENE COUNTY BANCORP INC Stock $gcbc

$gcbc Overview Financials Valuation SEC Filings Company Website

2020 Q4 Form 10-Q Financial Statement

#000114036121004531 Filed on February 12, 2021

Income Statement

Concept	2020 Q4	2019 Q4	2019 Q3
Revenue	$14.95M	$13.20M	$12.61M
YoY Change	13.28%	15.7%	14.65%
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	$190.0K	$180.0K	$180.0K
YoY Change	5.56%	5.88%	20.0%
% of Gross Profit
Operating Expenses
YoY Change
Operating Profit
YoY Change
Interest Expense	$1.340M	$2.286M	$2.108M
YoY Change	-41.38%	62.01%	57.31%
% of Operating Profit
Other Income/Expense, Net
YoY Change
Pretax Income	$7.201M	$6.002M	$5.793M
YoY Change	19.98%	8.44%	7.4%
Income Tax	$1.006M	$889.0K	$930.0K
% Of Pretax Income	13.97%	14.81%	16.05%
Net Earnings	$6.195M	$5.113M	$4.863M
YoY Change	21.16%	11.54%	11.03%
Net Earnings / Revenue	41.44%	38.74%	38.57%
Basic Earnings Per Share	$0.73	$0.60	$0.57
Diluted Earnings Per Share	$0.73	$0.60	$0.57
COMMON SHARES
Basic Shares Outstanding	8.513M	8.537M	8.538M
Diluted Shares Outstanding	8.513M	8.537M	8.538M

Balance Sheet

Concept	2020 Q4	2019 Q4	2019 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments
YoY Change
Cash & Equivalents	$57.02M	$34.54M	$110.9M
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	$14.05M	$13.27M	$13.34M
YoY Change	5.87%	-0.2%	0.27%
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	$1.865B	$1.444B	$1.410B
YoY Change	29.15%	20.8%	18.67%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable
YoY Change
Accrued Expenses	$20.80M	$17.20M	$16.40M
YoY Change	20.93%	44.54%	67.35%
Deferred Revenue
YoY Change
Short-Term Debt	$0.00
YoY Change
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$20.80M	$17.20M	$16.40M
YoY Change	20.93%	44.54%	67.35%
LONG-TERM LIABILITIES
Long-Term Debt	$19.60M	$0.00	$0.00
YoY Change
Other Long-Term Liabilities
YoY Change
Total Long-Term Liabilities	$19.60M	$0.00	$0.00
YoY Change
TOTAL LIABILITIES
Total Short-Term Liabilities	$20.80M	$17.20M	$16.40M
Total Long-Term Liabilities	$19.60M	$0.00	$0.00
Total Liabilities	$1.726B	$1.323B	$1.293B
YoY Change	30.44%	21.28%	18.84%
SHAREHOLDERS EQUITY
Retained Earnings	$128.4M	$110.4M	$106.2M
YoY Change	16.32%
Common Stock	$861.0K	$861.0K	$861.0K
YoY Change	0.0%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$908.0K	$315.0K	$277.0K
YoY Change	188.25%
Treasury Stock Shares	$97.93K	$74.93K	$73.53K
Shareholders Equity	$138.7M	$120.5M	$116.5M
YoY Change
Total Liabilities & Shareholders Equity	$1.865B	$1.444B	$1.410B
YoY Change	29.15%	20.8%	18.67%

Cashflow Statement

Concept	2020 Q4	2019 Q4	2019 Q3
OPERATING ACTIVITIES
Net Income	$6.195M	$5.113M	$4.863M
YoY Change	21.16%	11.54%	11.03%
Depreciation, Depletion And Amortization	$190.0K	$180.0K	$180.0K
YoY Change	5.56%	5.88%	20.0%
Cash From Operating Activities	$5.820M	$5.430M	$5.817M
YoY Change	7.18%	-9.65%	100.31%
INVESTING ACTIVITIES
Capital Expenditures	-$150.0K	-$120.0K	$256.0K
YoY Change	25.0%	-40.0%	118.8%
Acquisitions
YoY Change
Other Investing Activities	-$85.05M	-$110.0M	-$58.46M
YoY Change	-22.67%	1063.81%	106.35%
Cash From Investing Activities	-$85.19M	-$110.1M	-$58.71M
YoY Change	-22.63%	1041.04%	106.38%
FINANCING ACTIVITIES
Cash Dividend Paid			$432.0K
YoY Change			-49.41%
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	60.22M	28.37M	134.2M
YoY Change	112.27%	5936.17%	292.73%
NET CHANGE
Cash From Operating Activities	5.820M	5.430M	5.817M
Cash From Investing Activities	-85.19M	-110.1M	-58.71M
Cash From Financing Activities	60.22M	28.37M	134.2M
Net Change In Cash	-19.15M	-76.31M	81.31M
YoY Change	-74.9%	2307.26%	842.44%
FREE CASH FLOW
Cash From Operating Activities	$5.820M	$5.430M	$5.817M
Capital Expenditures	-$150.0K	-$120.0K	$256.0K
Free Cash Flow	$5.970M	$5.550M	$5.561M
YoY Change	7.57%	-10.63%	99.53%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value
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CY2020Q2	us-gaap	Financing Receivable Recorded Investment90 Days Past Due And Still Accruing FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing	0
CY2020Q2	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	16163000
CY2020Q4	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	18093000
CY2020Q4	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	1049010000
CY2020Q2	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	1009390000
CY2020Q4	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	2157000
CY2020Q2	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	3270000
	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	0
	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	76000
CY2020Q2	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionFairValue	11966000
CY2020Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionFairValue	4814000
CY2020Q2	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	383657000
CY2020Q4	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	408769000
CY2020Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	473000
CY2020Q2	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	361000
CY2020Q2	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Loss HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss	169000
CY2020Q4	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Loss HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss	33000
CY2020Q2	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss HeldToMaturitySecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	128000
CY2020Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss HeldToMaturitySecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	22000
CY2020Q4	us-gaap	Held To Maturity Securities Debt Maturities Single Maturity Date Fair Value HeldToMaturitySecuritiesDebtMaturitiesSingleMaturityDateFairValue	291911000
CY2020Q4	us-gaap	Held To Maturity Securities Debt Maturities Single Maturity Date Amortized Cost Basis HeldToMaturitySecuritiesDebtMaturitiesSingleMaturityDateAmortizedCostBasis	274588000
CY2020Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	11000
CY2020Q2	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	41000
CY2020Q4	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Gain HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain	25193000
CY2020Q2	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Gain HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain	22024000
CY2020Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	4341000
CY2020Q2	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	11605000
CY2020Q4	us-gaap	Held To Maturity Securities Debt Maturities Within One Year Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesWithinOneYearNetCarryingAmount	41684000
CY2020Q4	us-gaap	Held To Maturity Securities Debt Maturities After One Through Five Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	107389000
CY2020Q4	us-gaap	Held To Maturity Securities Debt Maturities Without Single Maturity Date Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesWithoutSingleMaturityDateNetCarryingAmount	134181000
CY2020Q4	us-gaap	Held To Maturity Securities Debt Maturities After Five Through Ten Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	75648000
CY2020Q4	us-gaap	Held To Maturity Securities Debt Maturities Within One Year Fair Value HeldToMaturitySecuritiesDebtMaturitiesWithinOneYearFairValue	42395000
CY2020Q4	us-gaap	Held To Maturity Securities Debt Maturities After Five Through Ten Years Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesAfterFiveThroughTenYearsNetCarryingAmount	69549000
CY2020Q4	us-gaap	Held To Maturity Securities Debt Maturities Without Single Maturity Date Fair Value HeldToMaturitySecuritiesDebtMaturitiesWithoutSingleMaturityDateFairValue	142018000
CY2020Q4	us-gaap	Held To Maturity Securities Debt Maturities After Ten Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesAfterTenYearsFairValue	66479000
CY2020Q4	us-gaap	Held To Maturity Securities Debt Maturities After One Through Five Years Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesAfterOneThroughFiveYearsNetCarryingAmount	102444000
CY2020Q4	us-gaap	Held To Maturity Securities Debt Maturities After Ten Years Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesAfterTenYearsNetCarryingAmount	60911000
CY2020Q4	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	433929000
CY2020Q2	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	405512000
CY2020Q4	us-gaap	Held To Maturity Securities In Unrealized Loss Positions Qualitative Disclosure Number Of Positions HeldToMaturitySecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions	9
CY2020Q2	us-gaap	Held To Maturity Securities In Unrealized Loss Positions Qualitative Disclosure Number Of Positions HeldToMaturitySecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions	20
CY2020Q4	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	2559000
CY2019Q4	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	3272000
	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	2870000
	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	3150000
CY2020Q4	us-gaap	Impaired Financing Receivable With Related Allowance Interest Income Cash Basis Method ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeCashBasisMethod	17000
CY2019Q4	us-gaap	Impaired Financing Receivable With Related Allowance Interest Income Cash Basis Method ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeCashBasisMethod	24000
	us-gaap	Impaired Financing Receivable With Related Allowance Interest Income Cash Basis Method ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeCashBasisMethod	26000
	us-gaap	Impaired Financing Receivable With Related Allowance Interest Income Cash Basis Method ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeCashBasisMethod	54000
CY2020Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment	986000
CY2019Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment	1191000
	us-gaap	Impaired Financing Receivable With No Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment	1125000
	us-gaap	Impaired Financing Receivable With No Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment	1338000
CY2020Q4	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	177000
CY2020Q2	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	228000
CY2020Q4	us-gaap	Impaired Financing Receivable With Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment	1573000
CY2019Q4	us-gaap	Impaired Financing Receivable With Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment	2081000
	us-gaap	Impaired Financing Receivable With Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment	1745000
	us-gaap	Impaired Financing Receivable With Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment	1812000
CY2019Q4	us-gaap	Impaired Financing Receivable Interest Income Cash Basis Method ImpairedFinancingReceivableInterestIncomeCashBasisMethod	41000
CY2020Q4	us-gaap	Impaired Financing Receivable Interest Income Cash Basis Method ImpairedFinancingReceivableInterestIncomeCashBasisMethod	29000
	us-gaap	Impaired Financing Receivable Interest Income Cash Basis Method ImpairedFinancingReceivableInterestIncomeCashBasisMethod	44000
	us-gaap	Impaired Financing Receivable Interest Income Cash Basis Method ImpairedFinancingReceivableInterestIncomeCashBasisMethod	108000
CY2020Q4	us-gaap	Impaired Financing Receivable With Related Allowance Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment	1115000
CY2020Q2	us-gaap	Impaired Financing Receivable With Related Allowance Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment	1662000
CY2020Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Unpaid Principal Balance ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance	1042000
CY2020Q2	us-gaap	Impaired Financing Receivable With No Related Allowance Unpaid Principal Balance ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance	1608000
CY2020Q4	us-gaap	Impaired Financing Receivable With Related Allowance Unpaid Principal Balance ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance	1115000
CY2020Q2	us-gaap	Impaired Financing Receivable With Related Allowance Unpaid Principal Balance ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance	1662000
CY2020Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment	1042000
CY2020Q2	us-gaap	Impaired Financing Receivable With No Related Allowance Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment	1608000
CY2020Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Interest Income Cash Basis Method ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeCashBasisMethod	12000
CY2019Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Interest Income Cash Basis Method ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeCashBasisMethod	17000
	us-gaap	Impaired Financing Receivable With No Related Allowance Interest Income Cash Basis Method ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeCashBasisMethod	18000
	us-gaap	Impaired Financing Receivable With No Related Allowance Interest Income Cash Basis Method ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeCashBasisMethod	54000
CY2020Q4	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	2157000
CY2020Q2	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	3270000
CY2020Q4	us-gaap	Impaired Financing Receivable Unpaid Principal Balance ImpairedFinancingReceivableUnpaidPrincipalBalance	2157000
CY2020Q2	us-gaap	Impaired Financing Receivable Unpaid Principal Balance ImpairedFinancingReceivableUnpaidPrincipalBalance	3270000
CY2019Q4	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	6002000
CY2020Q4	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	7201000
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	12719000
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	11795000
CY2020Q4	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1006000
CY2019Q4	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	889000
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1649000
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1819000
	us-gaap	Income Taxes Paid IncomeTaxesPaid	2616000
	us-gaap	Income Taxes Paid IncomeTaxesPaid	1820000
	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	-318000
	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	-967000
	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	124089000
	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	178643000
	us-gaap	Increase Decrease In Interest And Dividends Receivable IncreaseDecreaseInInterestAndDividendsReceivable	268000
	us-gaap	Increase Decrease In Interest And Dividends Receivable IncreaseDecreaseInInterestAndDividendsReceivable	957000
	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-256000
	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	2323000
	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	2185000
	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	1584000
CY2020Q4	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	671000
CY2019Q4	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	638000
	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	1212000
	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	1284000
CY2019Q4	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	13197000
CY2020Q4	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	14949000
	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	25805000
	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	28287000
CY2020Q4	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	11766000
CY2019Q4	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	9801000
	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	21958000
	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	19206000
CY2020Q4	us-gaap	Interest Expense InterestExpense	1340000
CY2019Q4	us-gaap	Interest Expense InterestExpense	2286000
	us-gaap	Interest Expense InterestExpense	4394000
	us-gaap	Interest Expense InterestExpense	2862000
CY2019Q4	us-gaap	Interest Expense Borrowings InterestExpenseBorrowings	81000
CY2020Q4	us-gaap	Interest Expense Borrowings InterestExpenseBorrowings	287000
	us-gaap	Interest Expense Borrowings InterestExpenseBorrowings	420000
	us-gaap	Interest Expense Borrowings InterestExpenseBorrowings	139000
CY2019Q4	us-gaap	Interest Expense Deposits InterestExpenseDeposits	2205000
CY2020Q4	us-gaap	Interest Expense Deposits InterestExpenseDeposits	1053000
	us-gaap	Interest Expense Deposits InterestExpenseDeposits	4255000
	us-gaap	Interest Expense Deposits InterestExpenseDeposits	2442000
CY2019Q4	us-gaap	Interest Income Securities Tax Exempt InterestIncomeSecuritiesTaxExempt	1756000
CY2020Q4	us-gaap	Interest Income Securities Tax Exempt InterestIncomeSecuritiesTaxExempt	1960000
	us-gaap	Interest Income Securities Tax Exempt InterestIncomeSecuritiesTaxExempt	3358000
	us-gaap	Interest Income Securities Tax Exempt InterestIncomeSecuritiesTaxExempt	3935000
CY2020Q4	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	12347000
CY2019Q4	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	10221000
	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	20170000
	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	22920000
CY2020Q4	us-gaap	Interest Income Securities Mortgage Backed InterestIncomeSecuritiesMortgageBacked	1020000
CY2019Q4	us-gaap	Interest Income Securities Mortgage Backed InterestIncomeSecuritiesMortgageBacked	1261000
	us-gaap	Interest Income Securities Mortgage Backed InterestIncomeSecuritiesMortgageBacked	2040000
	us-gaap	Interest Income Securities Mortgage Backed InterestIncomeSecuritiesMortgageBacked	2505000
CY2020Q4	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	13609000
CY2019Q4	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	10911000
	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	21411000
	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	25425000
CY2019Q4	us-gaap	Interest Income Securities Taxable InterestIncomeSecuritiesTaxable	172000
CY2020Q4	us-gaap	Interest Income Securities Taxable InterestIncomeSecuritiesTaxable	182000
	us-gaap	Interest Income Securities Taxable InterestIncomeSecuritiesTaxable	331000
	us-gaap	Interest Income Securities Taxable InterestIncomeSecuritiesTaxable	326000
CY2020Q2	us-gaap	Interest Bearing Deposit Liabilities Domestic InterestBearingDepositLiabilitiesDomestic	1362888000
CY2020Q4	us-gaap	Interest Bearing Deposit Liabilities Domestic InterestBearingDepositLiabilitiesDomestic	1521940000
	us-gaap	Investment Banking Advisory Brokerage And Underwriting Fees And Commissions InvestmentBankingAdvisoryBrokerageAndUnderwritingFeesAndCommissions	377000
	us-gaap	Interest Paid Net InterestPaidNet	4371000
	us-gaap	Interest Paid Net InterestPaidNet	2614000
CY2020Q4	us-gaap	Interest Receivable InterestReceivable	8475000
CY2020Q2	us-gaap	Interest Receivable InterestReceivable	8207000
CY2020Q4	us-gaap	Investment Banking Advisory Brokerage And Underwriting Fees And Commissions InvestmentBankingAdvisoryBrokerageAndUnderwritingFeesAndCommissions	216000
CY2019Q4	us-gaap	Investment Banking Advisory Brokerage And Underwriting Fees And Commissions InvestmentBankingAdvisoryBrokerageAndUnderwritingFeesAndCommissions	168000
	us-gaap	Investment Banking Advisory Brokerage And Underwriting Fees And Commissions InvestmentBankingAdvisoryBrokerageAndUnderwritingFeesAndCommissions	313000
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	283000
CY2020Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	179000
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Remainder Of Fiscal Year LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear	338000
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	274000
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	2242000
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	273000
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	291000
CY2019Q4	us-gaap	Labor And Related Expense LaborAndRelatedExpense	3992000
CY2020Q4	us-gaap	Labor And Related Expense LaborAndRelatedExpense	4771000
	us-gaap	Labor And Related Expense LaborAndRelatedExpense	9178000
	us-gaap	Labor And Related Expense LaborAndRelatedExpense	7934000
CY2020Q2	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	1676803000
CY2020Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	1864929000
CY2020Q4	us-gaap	Liabilities Liabilities	1726193000
CY2020Q2	us-gaap	Liabilities Liabilities	1547998000
CY2020Q4	us-gaap	Loans And Leases Receivable Before Fees Gross LoansAndLeasesReceivableBeforeFeesGross	1051167000
CY2020Q2	us-gaap	Loans And Leases Receivable Before Fees Gross LoansAndLeasesReceivableBeforeFeesGross	1012660000
CY2020Q2	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	16391000
CY2020Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	18270000
CY2019Q3	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	13444000
CY2019Q2	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	13200000
CY2020Q3	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	17596000
CY2019Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	13984000
	us-gaap	Loans And Leases Receivable Impaired Interest Lost On Nonaccrual Loans LoansAndLeasesReceivableImpairedInterestLostOnNonaccrualLoans	198000
CY2020Q4	us-gaap	Loans And Leases Receivable Impaired Interest Lost On Nonaccrual Loans LoansAndLeasesReceivableImpairedInterestLostOnNonaccrualLoans	92000
	us-gaap	Loans And Leases Receivable Impaired Interest Lost On Nonaccrual Loans LoansAndLeasesReceivableImpairedInterestLostOnNonaccrualLoans	154000
CY2019Q4	us-gaap	Loans And Leases Receivable Impaired Interest Lost On Nonaccrual Loans LoansAndLeasesReceivableImpairedInterestLostOnNonaccrualLoans	53000
CY2020Q4	us-gaap	Loans And Leases Receivable Net Reported Amount LoansAndLeasesReceivableNetReportedAmount	1031519000
CY2020Q2	us-gaap	Loans And Leases Receivable Net Reported Amount LoansAndLeasesReceivableNetReportedAmount	993522000
CY2020Q4	us-gaap	Mortgage Loans In Process Of Foreclosure Amount MortgageLoansInProcessOfForeclosureAmount	433000
CY2020Q2	us-gaap	Mortgage Loans In Process Of Foreclosure Amount MortgageLoansInProcessOfForeclosureAmount	1300000
	us-gaap	Nature Of Operations NatureOfOperations	<div style="font-family: 'Times New Roman'; font-size: 10pt;"><table cellpadding="0" cellspacing="0" class="DSPFListTable" style="width: 100%; font-family: 'Times New Roman'; font-size: 10pt;"><tr style="vertical-align: top;"><td style="vertical-align: top; width: 36pt;"><div style="text-align: justify;"><font style="font-weight: bold;">(2)</font></div></td><td style="vertical-align: top; width: auto;"><div style="text-align: justify;"><font style="font-weight: bold;">Nature of Operations</font></div></td></tr></table><div><br /></div><div style="text-align: justify;">Greene County Bancorp, Inc.’s primary business is the ownership and operation of its subsidiaries, The Bank of Greene County and Greene Risk Management, Inc.  The Bank of Greene County has 17 full-service offices and an operations center and lending center located in its market area within the Hudson Valley and Capital District Regions of New York State.  The Bank of Greene County is primarily engaged in the business of attracting deposits from the general public in The Bank of Greene County’s market area, and investing such deposits, together with other sources of funds, in loans and investment securities. Greene Risk Management, Inc. is a pooled captive insurance company, which provides additional insurance coverage for the Company and its subsidiaries related to the operations of the Company for which insurance may not be economically feasible. The Bank of Greene County also owns and operates two subsidiaries, Greene County Commercial Bank and Greene Property Holdings, Ltd. Greene County Commercial Bank’s primary business is to attract deposits from, and provide banking services to, local municipalities. Greene Property Holdings, Ltd. was formed as a New York corporation that has elected under the Internal Revenue Code to be a real estate investment trust, which holds mortgages and notes which were originated through and serviced by The Bank of Greene County.</div></div>
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	11251000
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	11323000
CY2019Q4	us-gaap	Net Income Loss NetIncomeLoss	5113000
CY2020Q4	us-gaap	Net Income Loss NetIncomeLoss	6195000
	us-gaap	Net Income Loss NetIncomeLoss	9976000
	us-gaap	Net Income Loss NetIncomeLoss	11070000
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-168822000
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-172681000
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	177919000
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	162575000
CY2020Q4	us-gaap	Noninterest Expense NoninterestExpense	7540000
CY2019Q4	us-gaap	Noninterest Expense NoninterestExpense	6535000
	us-gaap	Noninterest Expense NoninterestExpense	14673000
	us-gaap	Noninterest Expense NoninterestExpense	12957000
CY2019Q4	us-gaap	Noninterest Income NoninterestIncome	2316000
CY2020Q4	us-gaap	Noninterest Income NoninterestIncome	2394000
	us-gaap	Noninterest Income NoninterestIncome	4582000
	us-gaap	Noninterest Income NoninterestIncome	4472000
CY2020Q4	us-gaap	Noninterest Bearing Deposit Liabilities Domestic NoninterestBearingDepositLiabilitiesDomestic	157778000
CY2020Q2	us-gaap	Noninterest Bearing Deposit Liabilities Domestic NoninterestBearingDepositLiabilitiesDomestic	138187000
CY2020Q4	us-gaap	Number Of Stores NumberOfStores	17
CY2019Q4	us-gaap	Occupancy Net OccupancyNet	441000
CY2020Q4	us-gaap	Occupancy Net OccupancyNet	464000
	us-gaap	Occupancy Net OccupancyNet	907000
	us-gaap	Occupancy Net OccupancyNet	979000
CY2020Q4	us-gaap	Operating Lease Payments OperatingLeasePayments	86000
CY2019Q4	us-gaap	Operating Lease Payments OperatingLeasePayments	78000
	us-gaap	Operating Lease Payments OperatingLeasePayments	173000
	us-gaap	Operating Lease Payments OperatingLeasePayments	155000
CY2020Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0222
CY2020Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	2063000
CY2020Q2	us-gaap	Operating Lease Liability OperatingLeaseLiability	1587000
CY2020Q4	us-gaap	Operating Lease Cost OperatingLeaseCost	81000
	us-gaap	Operating Lease Cost OperatingLeaseCost	142000
	us-gaap	Operating Lease Cost OperatingLeaseCost	161000
CY2019Q4	us-gaap	Operating Lease Cost OperatingLeaseCost	70000
CY2020Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	2043000
CY2020Q2	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	1575000
CY2020Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P6Y2M5D
	us-gaap	Other Than Temporary Impairment Loss Debt Securities Available For Sale OtherThanTemporaryImpairmentLossDebtSecuritiesAvailableForSale	0
CY2020Q4	us-gaap	Other Than Temporary Impairment Loss Debt Securities Available For Sale OtherThanTemporaryImpairmentLossDebtSecuritiesAvailableForSale	0
CY2019Q4	us-gaap	Other Than Temporary Impairment Loss Debt Securities Available For Sale OtherThanTemporaryImpairmentLossDebtSecuritiesAvailableForSale	0
	us-gaap	Other Than Temporary Impairment Loss Debt Securities Available For Sale OtherThanTemporaryImpairmentLossDebtSecuritiesAvailableForSale	0
CY2020Q4	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-3000
CY2019Q4	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-40000
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-136000
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-70000
CY2019Q4	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-114000
CY2020Q4	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-8000
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-385000
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-198000
CY2019Q4	us-gaap	Other Operating Income OtherOperatingIncome	251000
CY2020Q4	us-gaap	Other Operating Income OtherOperatingIncome	299000
	us-gaap	Other Operating Income OtherOperatingIncome	469000
	us-gaap	Other Operating Income OtherOperatingIncome	488000
CY2020Q4	us-gaap	Other Noninterest Expense OtherNoninterestExpense	541000
CY2019Q4	us-gaap	Other Noninterest Expense OtherNoninterestExpense	595000
	us-gaap	Other Noninterest Expense OtherNoninterestExpense	1121000
	us-gaap	Other Noninterest Expense OtherNoninterestExpense	1156000
CY2020Q2	us-gaap	Other Short Term Borrowings OtherShortTermBorrowings	17884000
CY2020Q4	us-gaap	Other Short Term Borrowings OtherShortTermBorrowings	0
CY2020Q4	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-8000
CY2019Q4	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-114000
	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-385000
	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-198000
	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	67024000
	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	39553000
	us-gaap	Payments For Proceeds From Federal Home Loan Bank Stock PaymentsForProceedsFromFederalHomeLoanBankStock	-68000
	us-gaap	Payments For Proceeds From Federal Home Loan Bank Stock PaymentsForProceedsFromFederalHomeLoanBankStock	1795000
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	38000
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	0
	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	124023000
	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	220194000
	us-gaap	Payments Of Dividends PaymentsOfDividends	1376000
	us-gaap	Payments Of Dividends PaymentsOfDividends	941000
	us-gaap	Payments To Acquire Held To Maturity Securities PaymentsToAcquireHeldToMaturitySecurities	76035000
	us-gaap	Payments To Acquire Held To Maturity Securities PaymentsToAcquireHeldToMaturitySecurities	60251000
CY2020Q4	us-gaap	Prepaid Expense And Other Assets PrepaidExpenseAndOtherAssets	7058000
CY2020Q2	us-gaap	Prepaid Expense And Other Assets PrepaidExpenseAndOtherAssets	5024000
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	380000
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	755000
	us-gaap	Payments To Acquire Restricted Certificates Of Deposit PaymentsToAcquireRestrictedCertificatesOfDeposit	751000
	us-gaap	Payments To Acquire Restricted Certificates Of Deposit PaymentsToAcquireRestrictedCertificatesOfDeposit	268000
CY2020Q2	us-gaap	Pledged Financial Instruments Not Separately Reported Securities Pledged PledgedFinancialInstrumentsNotSeparatelyReportedSecuritiesPledged	4700000
CY2020Q4	us-gaap	Pledged Financial Instruments Not Separately Reported Securities Pledged PledgedFinancialInstrumentsNotSeparatelyReportedSecuritiesPledged	4200000
CY2020Q2	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0
CY2020Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0
CY2020Q2	us-gaap	Preferred Stock Value PreferredStockValue	0
CY2020Q4	us-gaap	Preferred Stock Value PreferredStockValue	0
CY2020Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	1000000
CY2020Q2	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	1000000
	us-gaap	Proceeds From Issuance Of Subordinated Long Term Debt ProceedsFromIssuanceOfSubordinatedLongTermDebt	0
	us-gaap	Proceeds From Issuance Of Subordinated Long Term Debt ProceedsFromIssuanceOfSubordinatedLongTermDebt	19601000
	us-gaap	Proceeds From Sale And Maturity Of Held To Maturity Securities ProceedsFromSaleAndMaturityOfHeldToMaturitySecurities	18629000
	us-gaap	Proceeds From Sale And Maturity Of Held To Maturity Securities ProceedsFromSaleAndMaturityOfHeldToMaturitySecurities	17136000
	us-gaap	Proceeds From Sale And Maturity Of Available For Sale Securities ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities	48092000
	us-gaap	Proceeds From Sale And Maturity Of Available For Sale Securities ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities	105424000
CY2020Q4	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	0
CY2019Q4	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	0
	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	0
	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	0
	us-gaap	Proceeds From Sale Of Foreclosed Assets ProceedsFromSaleOfForeclosedAssets	41000
	us-gaap	Proceeds From Sale Of Foreclosed Assets ProceedsFromSaleOfForeclosedAssets	0
CY2019Q4	us-gaap	Professional Fees ProfessionalFees	325000
CY2020Q4	us-gaap	Professional Fees ProfessionalFees	319000
	us-gaap	Professional Fees ProfessionalFees	604000
	us-gaap	Professional Fees ProfessionalFees	595000
CY2020Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	14052000
CY2020Q2	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	13658000
CY2019Q4	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	690000
CY2020Q4	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	1262000
	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	1241000
	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	2505000
CY2020Q4	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	625000
CY2019Q4	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	1840000
	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	625000
	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	1840000
CY2020Q4	us-gaap	Real Estate Acquired Through Foreclosure RealEstateAcquiredThroughForeclosure	385000
CY2020Q2	us-gaap	Real Estate Acquired Through Foreclosure RealEstateAcquiredThroughForeclosure	0
	us-gaap	Repayments Of Bank Debt RepaymentsOfBankDebt	7000000
	us-gaap	Repayments Of Bank Debt RepaymentsOfBankDebt	0
	us-gaap	Repayments Of Federal Home Loan Bank Borrowings RepaymentsOfFederalHomeLoanBankBorrowings	1000000
	us-gaap	Repayments Of Federal Home Loan Bank Borrowings RepaymentsOfFederalHomeLoanBankBorrowings	1500000
CY2020Q2	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	118263000
	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	0
CY2020Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	128392000
CY2020Q2	us-gaap	Stockholders Equity StockholdersEquity	128805000
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	138736000
CY2019Q3	us-gaap	Stockholders Equity StockholdersEquity	116529000
CY2020Q3	us-gaap	Stockholders Equity StockholdersEquity	133022000
CY2019Q2	us-gaap	Stockholders Equity StockholdersEquity	112369000
CY2019Q4	us-gaap	Stockholders Equity StockholdersEquity	120546000
CY2020Q2	us-gaap	Subordinated Debt SubordinatedDebt	0
CY2020Q4	us-gaap	Subordinated Debt SubordinatedDebt	19601000
	us-gaap	Transfer To Other Real Estate TransferToOtherRealEstate	300000
	us-gaap	Transfer To Other Real Estate TransferToOtherRealEstate	215000
CY2020Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	97926
CY2020Q2	us-gaap	Treasury Stock Shares TreasuryStockShares	97926
	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	38000
CY2019Q4	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	38000
CY2020Q2	us-gaap	Treasury Stock Value TreasuryStockValue	908000
CY2020Q4	us-gaap	Treasury Stock Value TreasuryStockValue	908000
CY2020Q4	us-gaap	Unamortized Loan Commitment And Origination Fees And Unamortized Discounts Or Premiums UnamortizedLoanCommitmentAndOriginationFeesAndUnamortizedDiscountsOrPremiums	-1378000
CY2020Q2	us-gaap	Unamortized Loan Commitment And Origination Fees And Unamortized Discounts Or Premiums UnamortizedLoanCommitmentAndOriginationFeesAndUnamortizedDiscountsOrPremiums	-2747000
	us-gaap	Use Of Estimates UseOfEstimates	<div style="font-family: 'Times New Roman'; font-size: 10pt;"><div style="text-align: justify;">The preparation of consolidated financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period.  Actual results could materially differ from those estimates. Material estimates that are particularly susceptible to significant change in the near term relate to the determination of the allowance for loan losses and the assessment of other-than-temporary security impairment.</div><div><br /></div><div style="text-align: justify;">While management uses available information to recognize losses on loans, future additions to the allowance for loan losses (the “Allowance”) may be necessary, based on changes in economic conditions, asset quality or other factors. In addition, various regulatory authorities, as an integral part of their examination process, periodically review the Allowance. Such authorities may require the Company to recognize additions to the Allowance based on their judgments of information available to them at the time of their examination.</div><div><br /></div><div style="text-align: justify;">Greene County Bancorp, Inc. makes an assessment to determine whether there have been any events or economic circumstances to indicate that a security on which there is an unrealized loss is impaired on an other-than-temporary basis. The Company considers many factors including the severity and duration of the impairment; the intent and ability of the Company to hold the security for a period of time sufficient for a recovery in value; recent events specific to the issuer or industry; and for debt securities, intent to sell the security, whether it is more likely than not we will be required to sell the security before recovery, whether loss is expected, external credit ratings and recent downgrades. Securities on which there is an unrealized loss that is deemed to be other-than-temporary are written down to fair value through earnings.</div></div>
CY2020Q4	us-gaap	Variable Lease Cost VariableLeaseCost	10000
	us-gaap	Variable Lease Cost VariableLeaseCost	20000
	us-gaap	Variable Lease Cost VariableLeaseCost	20000
CY2019Q4	us-gaap	Variable Lease Cost VariableLeaseCost	10000
CY2019Q4	us-gaap	Weighted Average Number Of Share Outstanding Basic And Diluted WeightedAverageNumberOfShareOutstandingBasicAndDiluted	8537010
CY2020Q4	us-gaap	Weighted Average Number Of Share Outstanding Basic And Diluted WeightedAverageNumberOfShareOutstandingBasicAndDiluted	8513414
	us-gaap	Weighted Average Number Of Share Outstanding Basic And Diluted WeightedAverageNumberOfShareOutstandingBasicAndDiluted	8513414
	us-gaap	Weighted Average Number Of Share Outstanding Basic And Diluted WeightedAverageNumberOfShareOutstandingBasicAndDiluted	8537412
CY2020Q4	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	0
CY2020Q4	gcbc	Number Of Securities Unrealized Loss Position Twelve Months Or Longer NumberOfSecuritiesUnrealizedLossPositionTwelveMonthsOrLonger	1
CY2020Q2	gcbc	Number Of Securities Unrealized Loss Position NumberOfSecuritiesUnrealizedLossPosition	24
CY2020Q4	gcbc	Number Of Securities Unrealized Loss Position NumberOfSecuritiesUnrealizedLossPosition	23
CY2020Q2	gcbc	Securities Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss SecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	128000
CY2020Q4	gcbc	Securities Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss SecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	22000
	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	0
CY2019Q4	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	0
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	8513414
CY2020Q4	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	8513414
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	8537412
CY2019Q4	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	8537010
CY2020Q4	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	8513414
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	8537412
CY2019Q4	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	8537010
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	8513414
	dei	Amendment Flag AmendmentFlag	false
	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--06-30
	dei	Document Period End Date DocumentPeriodEndDate	2020-12-31
	dei	Entity Address State Or Province EntityAddressStateOrProvince	NY
	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
	dei	Entity Filer Category EntityFilerCategory	Non-accelerated Filer
	dei	Entity Registrant Name EntityRegistrantName	GREENE COUNTY BANCORP INC
	dei	Entity Central Index Key EntityCentralIndexKey	0001070524
CY2021Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	8513414
	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2021
	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	Q2
	dei	Document Type DocumentType	10-Q
	dei	Document Quarterly Report DocumentQuarterlyReport	true
	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
	dei	Entity Shell Company EntityShellCompany	false
	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
	dei	Entity Small Business EntitySmallBusiness	true
	gcbc	Gains Losses On Foreclosed Real Estate GainsLossesOnForeclosedRealEstate	76000
	gcbc	Gains Losses On Foreclosed Real Estate GainsLossesOnForeclosedRealEstate	0
CY2019Q4	gcbc	Gains Losses On Foreclosed Real Estate GainsLossesOnForeclosedRealEstate	0
CY2020Q4	gcbc	Gains Losses On Foreclosed Real Estate GainsLossesOnForeclosedRealEstate	0
CY2020Q2	gcbc	Held To Maturity Securities In Unrealized Loss Positions Qualitative Disclosure Number Of Positions Greater Than Or Equal To One Year HeldToMaturitySecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositionsGreaterThanOrEqualToOneYear	1
CY2020Q4	gcbc	Held To Maturity Securities In Unrealized Loss Positions Qualitative Disclosure Number Of Positions Greater Than Or Equal To One Year HeldToMaturitySecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositionsGreaterThanOrEqualToOneYear	1
CY2020Q4	gcbc	Number Of Securities Unrealized Loss Position Less Than Twelve Months NumberOfSecuritiesUnrealizedLossPositionLessThanTwelveMonths	22
CY2020Q2	gcbc	Number Of Securities Unrealized Loss Position Less Than Twelve Months NumberOfSecuritiesUnrealizedLossPositionLessThanTwelveMonths	23
CY2020Q2	gcbc	Number Of Securities Unrealized Loss Position Twelve Months Or Longer NumberOfSecuritiesUnrealizedLossPositionTwelveMonthsOrLonger	1
CY2020Q2	gcbc	Securities Continuous Unrealized Loss Positions Fair Value SecuritiesContinuousUnrealizedLossPositionsFairValue	15504000
CY2020Q4	gcbc	Securities Continuous Unrealized Loss Positions Fair Value SecuritiesContinuousUnrealizedLossPositionsFairValue	47600000
CY2020Q2	gcbc	Held To Maturity Securities In Unrealized Loss Positions Qualitative Disclosure Number Of Positions Less Than One Year HeldToMaturitySecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositionsLessThanOneYear	19
CY2020Q4	gcbc	Held To Maturity Securities In Unrealized Loss Positions Qualitative Disclosure Number Of Positions Less Than One Year HeldToMaturitySecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositionsLessThanOneYear	8
CY2020Q4	gcbc	Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value SecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	47127000
CY2020Q2	gcbc	Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value SecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	15143000
CY2020Q2	gcbc	Securities Continuous Unrealized Loss Position Accumulated Loss SecuritiesContinuousUnrealizedLossPositionAccumulatedLoss	58000
CY2020Q4	gcbc	Securities Continuous Unrealized Loss Position Accumulated Loss SecuritiesContinuousUnrealizedLossPositionAccumulatedLoss	390000
CY2020Q4	gcbc	Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value SecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	473000
CY2020Q2	gcbc	Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value SecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	361000
CY2020Q4	gcbc	Securities Continuous Unrealized Loss Positions Accumulated Loss SecuritiesContinuousUnrealizedLossPositionsAccumulatedLoss	412000
CY2020Q2	gcbc	Securities Continuous Unrealized Loss Positions Accumulated Loss SecuritiesContinuousUnrealizedLossPositionsAccumulatedLoss	186000
	gcbc	Nonaccrual Loans Repayments NonaccrualLoansRepayments	1300000
	gcbc	Nonaccrual Loans Charge Offs NonaccrualLoansChargeOffs	588000
CY2020Q2	gcbc	Nonaccrual Loans With Recent History Of Delinquency Greater Than90 Days NonaccrualLoansWithRecentHistoryOfDelinquencyGreaterThan90Days	1400000
CY2020Q4	gcbc	Nonaccrual Loans With Recent History Of Delinquency Greater Than90 Days NonaccrualLoansWithRecentHistoryOfDelinquencyGreaterThan90Days	1500000
	gcbc	Nonaccrual Loans Loans Returned To Performing Status NonaccrualLoansLoansReturnedToPerformingStatus	293000
	gcbc	Nonaccrual Loans Loans Placed Into Nonperforming Status NonaccrualLoansLoansPlacedIntoNonperformingStatus	861000
CY2020Q4	gcbc	Financing Receivables Amount Of Loans In Nonaccrual That Previously Participated In Loan Deferment Program Due To Covid19 FinancingReceivablesAmountOfLoansInNonaccrualThatPreviouslyParticipatedInLoanDefermentProgramDueToCOVID19	204000
CY2020Q4	gcbc	Financing Receivables Number Of Loans In Nonaccrual That Previously Participated In Loan Deferment Program Due To Covid19 FinancingReceivablesNumberOfLoansInNonaccrualThatPreviouslyParticipatedInLoanDefermentProgramDueToCOVID19	4
	gcbc	Interest Income That Was Recorded On Nonaccrual Loans During Period InterestIncomeThatWasRecordedOnNonaccrualLoansDuringPeriod	126000
	gcbc	Interest Income That Was Recorded On Nonaccrual Loans During Period InterestIncomeThatWasRecordedOnNonaccrualLoansDuringPeriod	92000
CY2019Q4	gcbc	Interest Income That Was Recorded On Nonaccrual Loans During Period InterestIncomeThatWasRecordedOnNonaccrualLoansDuringPeriod	42000
CY2020Q4	gcbc	Interest Income That Was Recorded On Nonaccrual Loans During Period InterestIncomeThatWasRecordedOnNonaccrualLoansDuringPeriod	88000
CY2020Q4	gcbc	Debit Card Fees DebitCardFees	917000
CY2019Q4	gcbc	Debit Card Fees DebitCardFees	755000
	gcbc	Debit Card Fees DebitCardFees	1498000
	gcbc	Debit Card Fees DebitCardFees	1810000
CY2019Q4	gcbc	E Commerce Fees ECommerceFees	31000
CY2020Q4	gcbc	E Commerce Fees ECommerceFees	28000
	gcbc	E Commerce Fees ECommerceFees	57000
	gcbc	E Commerce Fees ECommerceFees	66000
CY2020Q4	gcbc	Service Charges On Deposit Accounts ServiceChargesOnDepositAccounts	934000
CY2019Q4	gcbc	Service Charges On Deposit Accounts ServiceChargesOnDepositAccounts	1111000
	gcbc	Service Charges On Deposit Accounts ServiceChargesOnDepositAccounts	1740000
	gcbc	Service Charges On Deposit Accounts ServiceChargesOnDepositAccounts	2236000
CY2019Q4	gcbc	Interest Bearing Deposits And Federal Funds Sold InterestBearingDepositsAndFederalFundsSold	207000
CY2020Q4	gcbc	Interest Bearing Deposits And Federal Funds Sold InterestBearingDepositsAndFederalFundsSold	21000
	gcbc	Interest Bearing Deposits And Federal Funds Sold InterestBearingDepositsAndFederalFundsSold	28000
	gcbc	Interest Bearing Deposits And Federal Funds Sold InterestBearingDepositsAndFederalFundsSold	405000
CY2020Q4	gcbc	Computer Software Supplies And Support ComputerSoftwareSuppliesAndSupport	327000
CY2019Q4	gcbc	Computer Software Supplies And Support ComputerSoftwareSuppliesAndSupport	264000
	gcbc	Computer Software Supplies And Support ComputerSoftwareSuppliesAndSupport	506000
	gcbc	Computer Software Supplies And Support ComputerSoftwareSuppliesAndSupport	633000
	gcbc	Proceeds From Maturities Of Long Term Certificates Of Deposit ProceedsFromMaturitiesOfLongTermCertificatesOfDeposit	0
	gcbc	Proceeds From Maturities Of Long Term Certificates Of Deposit ProceedsFromMaturitiesOfLongTermCertificatesOfDeposit	245000
	gcbc	Proceeds From Payments Of Short Term Fhl Bank Borrowings Financing Activities ProceedsFromPaymentsOfShortTermFHLBankBorrowingsFinancingActivities	-40900000
	gcbc	Proceeds From Payments Of Short Term Fhl Bank Borrowings Financing Activities ProceedsFromPaymentsOfShortTermFHLBankBorrowingsFinancingActivities	10884000
	gcbc	Securities Held To Maturities Principal Payments On Securities SecuritiesHeldToMaturitiesPrincipalPaymentsOnSecurities	13586000
	gcbc	Securities Held To Maturities Principal Payments On Securities SecuritiesHeldToMaturitiesPrincipalPaymentsOnSecurities	32899000
	gcbc	Securities Available For Sale Principal Payments On Securities SecuritiesAvailableForSalePrincipalPaymentsOnSecurities	5054000
	gcbc	Securities Available For Sale Principal Payments On Securities SecuritiesAvailableForSalePrincipalPaymentsOnSecurities	8352000
	gcbc	Number Of Loan Portfolio Segments NumberOfLoanPortfolioSegments	4
CY2020Q2	gcbc	Financing Receivable Loan Deferral Program Amount Of Loan Modification Requests Received FinancingReceivableLoanDeferralProgramAmountOfLoanModificationRequestsReceived	193500000
CY2020Q4	gcbc	Financing Receivable Loan Deferral Program Amount Of Loan Modification Requests Received FinancingReceivableLoanDeferralProgramAmountOfLoanModificationRequestsReceived	14500000
CY2020Q4	gcbc	Financing Receivable Loan Deferral Program Number Of Loan Modification Requests Received FinancingReceivableLoanDeferralProgramNumberOfLoanModificationRequestsReceived	66
CY2020Q2	gcbc	Financing Receivable Loan Deferral Program Number Of Loan Modification Requests Received FinancingReceivableLoanDeferralProgramNumberOfLoanModificationRequestsReceived	706
CY2020Q4	gcbc	Financing Receivable Increase In Provision For Loan Losses To Reserve For Losses Resulting From Covid19 Pandemic FinancingReceivableIncreaseInProvisionForLoanLossesToReserveForLossesResultingFromCOVID19Pandemic	1300000
	gcbc	Financing Receivable Increase In Provision For Loan Losses To Reserve For Losses Resulting From Covid19 Pandemic FinancingReceivableIncreaseInProvisionForLoanLossesToReserveForLossesResultingFromCOVID19Pandemic	2500000
	gcbc	Financing Receivable Increase In Provision For Loan Losses To Reserve For Losses Resulting From Covid19 Pandemic FinancingReceivableIncreaseInProvisionForLoanLossesToReserveForLossesResultingFromCOVID19Pandemic	1200000
CY2019Q4	gcbc	Financing Receivable Increase In Provision For Loan Losses To Reserve For Losses Resulting From Covid19 Pandemic FinancingReceivableIncreaseInProvisionForLoanLossesToReserveForLossesResultingFromCOVID19Pandemic	690000
CY2020Q2	gcbc	Debt Securities Available For Sale And Held To Maturity Fair Value DebtSecuritiesAvailableForSaleAndHeldToMaturityFairValue	632221000
CY2020Q4	gcbc	Debt Securities Available For Sale And Held To Maturity Fair Value DebtSecuritiesAvailableForSaleAndHeldToMaturityFairValue	766033000
CY2020Q2	gcbc	Debt Securities Available For Sale And Held To Maturity Accumulated Unrecognized Gain DebtSecuritiesAvailableForSaleAndHeldToMaturityAccumulatedUnrecognizedGain	24410000
CY2020Q4	gcbc	Debt Securities Available For Sale And Held To Maturity Accumulated Unrecognized Gain DebtSecuritiesAvailableForSaleAndHeldToMaturityAccumulatedUnrecognizedGain	27673000
CY2020Q4	gcbc	Debt Securities Available For Sale And Held To Maturity Accumulated Unrecognized Loss DebtSecuritiesAvailableForSaleAndHeldToMaturityAccumulatedUnrecognizedLoss	412000
CY2020Q2	gcbc	Debt Securities Available For Sale And Held To Maturity Accumulated Unrecognized Loss DebtSecuritiesAvailableForSaleAndHeldToMaturityAccumulatedUnrecognizedLoss	186000
CY2020Q4	gcbc	Debt Securities Available For Sale And Held To Maturity Amortized Cost DebtSecuritiesAvailableForSaleAndHeldToMaturityAmortizedCost	738772000
CY2020Q2	gcbc	Debt Securities Available For Sale And Held To Maturity Amortized Cost DebtSecuritiesAvailableForSaleAndHeldToMaturityAmortizedCost	607997000
	gcbc	Number Of Categories Utilized Under Risk Management Approach Of Diversified Investing NumberOfCategoriesUtilizedUnderRiskManagementApproachOfDiversifiedInvesting	3
CY2020Q4	gcbc	Lessee Operating Lease Liability To Be Paid After Year Four LesseeOperatingLeaseLiabilityToBePaidAfterYearFour	783000

Files In Submission

Name	View Source	Status
0001140361-21-004531-index-headers.html	Edgar Link	pending
0001140361-21-004531-index.html	Edgar Link	pending
0001140361-21-004531.txt	Edgar Link	pending
0001140361-21-004531-xbrl.zip	Edgar Link	pending
brhc10020057_10q.htm	Edgar Link	pending
brhc10020057_ex31-1.htm	Edgar Link	pending
brhc10020057_ex31-2.htm	Edgar Link	pending
brhc10020057_ex32-1.htm	Edgar Link	pending
brhc10020057_ex32-2.htm	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xlsx	Edgar Link	pending
gcbc-20201231.xml	Edgar Link	completed
gcbc-20201231.xsd	Edgar Link	pending
gcbc-20201231_cal.xml	Edgar Link	unprocessable
gcbc-20201231_def.xml	Edgar Link	unprocessable
gcbc-20201231_lab.xml	Edgar Link	unprocessable
gcbc-20201231_pre.xml	Edgar Link	unprocessable
image0.jpg	Edgar Link	pending
R1.htm	Edgar Link	pending
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report.css	Edgar Link	pending
Show.js	Edgar Link	pending

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$GCBC
GREENE COUNTY BANCORP INC Stock $gcbc

2020 Q4 Form 10-Q Financial Statement

#000114036121004531 Filed on February 12, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$GCBC GREENE COUNTY BANCORP INC Stock $gcbc

2020 Q4 Form 10-Q Financial Statement

#000114036121004531 Filed on February 12, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$GCBC
GREENE COUNTY BANCORP INC Stock $gcbc