$GCBC
GREENE COUNTY BANCORP INC Stock $gcbc

$gcbc Overview Financials Valuation SEC Filings Company Website

2019 Q4 Form 10-Q Financial Statement

#000114036120002466 Filed on February 06, 2020

Income Statement

Concept	2019 Q4	2018 Q4	2018 Q3
Revenue	$13.20M	$11.41M	$11.00M
YoY Change	15.7%
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	$180.0K	$170.0K	$150.0K
YoY Change	5.88%	6.25%	-6.25%
% of Gross Profit
Operating Expenses
YoY Change
Operating Profit
YoY Change
Interest Expense	$2.286M	$1.411M	$1.340M
YoY Change	62.01%
% of Operating Profit
Other Income/Expense, Net
YoY Change
Pretax Income	$6.002M	$5.535M	$5.394M
YoY Change	8.44%	18.27%	15.5%
Income Tax	$889.0K	$951.0K	$1.014M
% Of Pretax Income	14.81%	17.18%	18.8%
Net Earnings	$5.113M	$4.584M	$4.380M
YoY Change	11.54%	25.93%	26.22%
Net Earnings / Revenue	38.74%	40.19%	39.83%
Basic Earnings Per Share	$0.60	$0.54	$0.51
Diluted Earnings Per Share	$0.60	$0.54	$0.51
COMMON SHARES
Basic Shares Outstanding	8.537M	8.538M	8.538M
Diluted Shares Outstanding	8.537M	8.538M	8.538M

Balance Sheet

Concept	2019 Q4	2018 Q4	2018 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments
YoY Change
Cash & Equivalents	$34.54M	$31.95M	$35.13M
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	$13.27M	$13.30M	$13.30M
YoY Change	-0.2%	-1.48%	-2.21%
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	$1.444B	$1.195B	$1.188B
YoY Change	20.8%	12.68%	14.49%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable
YoY Change
Accrued Expenses	$17.20M	$11.90M	$9.800M
YoY Change	44.54%	19.0%	-20.97%
Deferred Revenue
YoY Change
Short-Term Debt		$200.0K
YoY Change
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$17.20M	$11.90M	$9.800M
YoY Change	44.54%	19.0%	-20.97%
LONG-TERM LIABILITIES
Long-Term Debt	$0.00	$0.00	$0.00
YoY Change
Other Long-Term Liabilities
YoY Change
Total Long-Term Liabilities	$0.00	$0.00	$0.00
YoY Change
TOTAL LIABILITIES
Total Short-Term Liabilities	$17.20M	$11.90M	$9.800M
Total Long-Term Liabilities	$0.00	$0.00	$0.00
Total Liabilities	$1.323B	$1.091B	$1.088B
YoY Change	21.28%	12.36%	14.45%
SHAREHOLDERS EQUITY
Retained Earnings	$110.4M
YoY Change
Common Stock	$861.0K
YoY Change
Preferred Stock
YoY Change
Treasury Stock (at cost)	$315.0K
YoY Change
Treasury Stock Shares	$74.93K
Shareholders Equity	$120.5M	$104.1M	$99.64M
YoY Change
Total Liabilities & Shareholders Equity	$1.444B	$1.195B	$1.188B
YoY Change	20.8%	12.68%	14.49%

Cashflow Statement

Concept	2019 Q4	2018 Q4	2018 Q3
OPERATING ACTIVITIES
Net Income	$5.113M	$4.584M	$4.380M
YoY Change	11.54%	25.93%	26.22%
Depreciation, Depletion And Amortization	$180.0K	$170.0K	$150.0K
YoY Change	5.88%	6.25%	-6.25%
Cash From Operating Activities	$5.430M	$6.010M	$2.904M
YoY Change	-9.65%	163.6%	-55.19%
INVESTING ACTIVITIES
Capital Expenditures	-$120.0K	-$200.0K	$117.0K
YoY Change	-40.0%	100.0%	-217.0%
Acquisitions
YoY Change
Other Investing Activities	-$110.0M	-$9.450M	-$28.33M
YoY Change	1063.81%	-78.18%	12.42%
Cash From Investing Activities	-$110.1M	-$9.650M	-$28.45M
YoY Change	1041.04%	-77.76%	12.45%
FINANCING ACTIVITIES
Cash Dividend Paid			$854.0K
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	28.37M	470.0K	34.17M
YoY Change	5936.17%	-97.9%	-30.2%
NET CHANGE
Cash From Operating Activities	5.430M	6.010M	2.904M
Cash From Investing Activities	-110.1M	-9.650M	-28.45M
Cash From Financing Activities	28.37M	470.0K	34.17M
Net Change In Cash	-76.31M	-3.170M	8.628M
YoY Change	2307.26%	-83.05%	-71.37%
FREE CASH FLOW
Cash From Operating Activities	$5.430M	$6.010M	$2.904M
Capital Expenditures	-$120.0K	-$200.0K	$117.0K
Free Cash Flow	$5.550M	$6.210M	$2.787M
YoY Change	-10.63%	160.92%	-57.64%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value
	dei	Amendment Flag AmendmentFlag	false
	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--06-30
	dei	Document Period End Date DocumentPeriodEndDate	2019-12-31
	dei	Entity Address State Or Province EntityAddressStateOrProvince	NY
	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
	dei	Entity Filer Category EntityFilerCategory	Accelerated Filer
	dei	Entity Registrant Name EntityRegistrantName	GREENE COUNTY BANCORP INC
	dei	Entity Central Index Key EntityCentralIndexKey	0001070524
CY2020Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	8536414
	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2020
	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	Q2
	dei	Document Type DocumentType	10-Q
	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
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CY2019Q4	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	217000
CY2019Q2	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	262000
CY2019Q2	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	3894000
CY2019Q4	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	3391000
	us-gaap	Financing Receivable Modifications Subsequent Default Number Of Contracts1 FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1	0
CY2019Q4	us-gaap	Financing Receivable Modifications Subsequent Default Number Of Contracts1 FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1	0
CY2018Q4	us-gaap	Financing Receivable Modifications Subsequent Default Number Of Contracts1 FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1	0
	us-gaap	Financing Receivable Modifications Subsequent Default Number Of Contracts1 FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1	0
CY2019Q2	us-gaap	Financing Receivable Recorded Investment90 Days Past Due And Still Accruing FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing	0
CY2019Q4	us-gaap	Financing Receivable Recorded Investment90 Days Past Due And Still Accruing FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing	0
CY2019Q4	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	13767000
CY2019Q2	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	12938000
	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	-9000
	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	76000
CY2018Q4	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	0
CY2019Q4	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	0
CY2019Q2	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Loss HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss	79000
CY2019Q4	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Loss HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss	290000
CY2019Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss HeldToMaturitySecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	15000
CY2019Q2	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss HeldToMaturitySecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	56000
CY2019Q2	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	8348000
CY2019Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	3589000
CY2019Q4	us-gaap	Held To Maturity Securities Debt Maturities Single Maturity Date Amortized Cost Basis HeldToMaturitySecuritiesDebtMaturitiesSingleMaturityDateAmortizedCostBasis	183494000
CY2019Q2	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionFairValue	13139000
CY2019Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionFairValue	31096000
CY2019Q2	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	304208000
CY2019Q4	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	331989000
CY2019Q2	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	4791000
	us-gaap	Interest Expense Borrowings InterestExpenseBorrowings	139000
	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	3150000
CY2019Q2	us-gaap	Held To Maturity Securities In Unrealized Loss Positions Qualitative Disclosure Number Of Positions HeldToMaturitySecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions	41
CY2018Q4	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	3920000
CY2019Q4	us-gaap	Held To Maturity Securities Debt Maturities Single Maturity Date Fair Value HeldToMaturitySecuritiesDebtMaturitiesSingleMaturityDateFairValue	192275000
CY2019Q2	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Gain HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain	9484000
CY2019Q4	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Gain HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain	12197000
CY2019Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	275000
CY2019Q2	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	23000
CY2019Q4	us-gaap	Held To Maturity Securities Debt Maturities Within One Year Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesWithinOneYearNetCarryingAmount	31439000
CY2019Q4	us-gaap	Held To Maturity Securities Debt Maturities After Five Through Ten Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	50463000
CY2019Q4	us-gaap	Held To Maturity Securities Debt Maturities Without Single Maturity Date Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesWithoutSingleMaturityDateNetCarryingAmount	148495000
CY2019Q4	us-gaap	Held To Maturity Securities Debt Maturities After Ten Years Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesAfterTenYearsNetCarryingAmount	22901000
CY2019Q4	us-gaap	Held To Maturity Securities Debt Maturities After Five Through Ten Years Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesAfterFiveThroughTenYearsNetCarryingAmount	47539000
CY2019Q4	us-gaap	Held To Maturity Securities Debt Maturities After One Through Five Years Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesAfterOneThroughFiveYearsNetCarryingAmount	81615000
CY2019Q4	us-gaap	Held To Maturity Securities Debt Maturities After Ten Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesAfterTenYearsFairValue	26058000
CY2019Q4	us-gaap	Held To Maturity Securities Debt Maturities Within One Year Fair Value HeldToMaturitySecuritiesDebtMaturitiesWithinOneYearFairValue	31793000
CY2019Q4	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	343896000
CY2019Q2	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	313613000
CY2019Q4	us-gaap	Held To Maturity Securities Debt Maturities Without Single Maturity Date Fair Value HeldToMaturitySecuritiesDebtMaturitiesWithoutSingleMaturityDateFairValue	151621000
CY2019Q4	us-gaap	Held To Maturity Securities Debt Maturities After One Through Five Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	83961000
CY2019Q4	us-gaap	Held To Maturity Securities In Unrealized Loss Positions Qualitative Disclosure Number Of Positions HeldToMaturitySecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions	110
CY2019Q4	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	3272000
	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	3938000
CY2018Q4	us-gaap	Impaired Financing Receivable With Related Allowance Interest Income Cash Basis Method ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeCashBasisMethod	18000
	us-gaap	Impaired Financing Receivable With Related Allowance Interest Income Cash Basis Method ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeCashBasisMethod	45000
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	54000
CY2018Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment	1765000
	us-gaap	Impaired Financing Receivable With No Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment	1338000
	us-gaap	Impaired Financing Receivable With No Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment	1474000
CY2019Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment	1191000
	us-gaap	Impaired Financing Receivable With Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment	1812000
	us-gaap	Impaired Financing Receivable With Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment	2464000
CY2018Q4	us-gaap	Impaired Financing Receivable With Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment	2155000
CY2019Q4	us-gaap	Impaired Financing Receivable With Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment	2081000
	us-gaap	Impaired Financing Receivable Interest Income Cash Basis Method ImpairedFinancingReceivableInterestIncomeCashBasisMethod	63000
	us-gaap	Impaired Financing Receivable Interest Income Cash Basis Method ImpairedFinancingReceivableInterestIncomeCashBasisMethod	108000
CY2018Q4	us-gaap	Impaired Financing Receivable Interest Income Cash Basis Method ImpairedFinancingReceivableInterestIncomeCashBasisMethod	25000
CY2019Q4	us-gaap	Impaired Financing Receivable Interest Income Cash Basis Method ImpairedFinancingReceivableInterestIncomeCashBasisMethod	41000
CY2019Q4	us-gaap	Impaired Financing Receivable With Related Allowance Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment	2183000
CY2019Q2	us-gaap	Impaired Financing Receivable With Related Allowance Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment	2000000
CY2019Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Unpaid Principal Balance ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance	1208000
CY2019Q2	us-gaap	Impaired Financing Receivable With No Related Allowance Unpaid Principal Balance ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance	1894000
CY2019Q4	us-gaap	Impaired Financing Receivable With Related Allowance Unpaid Principal Balance ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance	2183000
CY2019Q2	us-gaap	Impaired Financing Receivable With Related Allowance Unpaid Principal Balance ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance	2000000
CY2019Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment	1208000
CY2019Q2	us-gaap	Impaired Financing Receivable With No Related Allowance Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment	1894000
CY2018Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Interest Income Cash Basis Method ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeCashBasisMethod	7000
	us-gaap	Impaired Financing Receivable With No Related Allowance Interest Income Cash Basis Method ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeCashBasisMethod	18000
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	54000
CY2019Q4	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	3391000
CY2019Q2	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	3894000
CY2019Q4	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	217000
CY2019Q2	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	262000
CY2019Q2	us-gaap	Impaired Financing Receivable Unpaid Principal Balance ImpairedFinancingReceivableUnpaidPrincipalBalance	3894000
CY2019Q4	us-gaap	Impaired Financing Receivable Unpaid Principal Balance ImpairedFinancingReceivableUnpaidPrincipalBalance	3391000
CY2019Q4	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	6002000
CY2018Q4	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	5535000
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	10929000
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	11795000
CY2018Q4	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	951000
CY2019Q4	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	889000
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1819000
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1965000
	us-gaap	Income Taxes Paid IncomeTaxesPaid	2049000
	us-gaap	Income Taxes Paid IncomeTaxesPaid	1820000
	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	155000
	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	-318000
	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	-7000
	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	2323000
	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	-16014000
	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	124089000
	us-gaap	Increase Decrease In Interest And Dividends Receivable IncreaseDecreaseInInterestAndDividendsReceivable	708000
	us-gaap	Increase Decrease In Interest And Dividends Receivable IncreaseDecreaseInInterestAndDividendsReceivable	957000
	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	648000
CY2019Q4	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	638000
CY2018Q4	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	542000
	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	1212000
	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	1037000
CY2018Q4	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	8696000
CY2019Q4	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	9801000
	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	19206000
	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	16994000
CY2019Q4	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	13197000
CY2018Q4	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	11406000
	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	25805000
	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	22403000
CY2019Q4	us-gaap	Interest Expense InterestExpense	2286000
CY2018Q4	us-gaap	Interest Expense InterestExpense	1411000
	us-gaap	Interest Expense InterestExpense	2751000
	us-gaap	Interest Expense InterestExpense	4394000
CY2019Q4	us-gaap	Interest Expense Borrowings InterestExpenseBorrowings	81000
	us-gaap	Labor And Related Expense LaborAndRelatedExpense	7934000
CY2018Q4	us-gaap	Interest Expense Borrowings InterestExpenseBorrowings	140000
	us-gaap	Interest Expense Borrowings InterestExpenseBorrowings	444000
CY2019Q4	us-gaap	Interest Expense Deposits InterestExpenseDeposits	2205000
	us-gaap	Interest Expense Deposits InterestExpenseDeposits	4255000
	us-gaap	Interest Income Securities Taxable InterestIncomeSecuritiesTaxable	331000
CY2018Q4	us-gaap	Interest Income Securities Tax Exempt InterestIncomeSecuritiesTaxExempt	1406000
	us-gaap	Labor And Related Expense LaborAndRelatedExpense	7155000
CY2019Q4	us-gaap	Prepaid Expense And Other Assets PrepaidExpenseAndOtherAssets	5525000
CY2019Q2	us-gaap	Prepaid Expense And Other Assets PrepaidExpenseAndOtherAssets	3202000
	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	40900000
	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	54900000
	us-gaap	Proceeds From Sale Of Foreclosed Assets ProceedsFromSaleOfForeclosedAssets	65000
	us-gaap	Proceeds From Sale Of Foreclosed Assets ProceedsFromSaleOfForeclosedAssets	41000
CY2018Q4	us-gaap	Interest Expense Deposits InterestExpenseDeposits	1271000
	us-gaap	Interest Expense Deposits InterestExpenseDeposits	2307000
CY2019Q4	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	10911000
CY2018Q4	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	9995000
	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	21411000
	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	19652000
CY2019Q4	us-gaap	Interest Income Securities Taxable InterestIncomeSecuritiesTaxable	172000
CY2018Q4	us-gaap	Interest Income Securities Taxable InterestIncomeSecuritiesTaxable	217000
	us-gaap	Interest Income Securities Taxable InterestIncomeSecuritiesTaxable	411000
CY2019Q4	us-gaap	Interest Income Securities Tax Exempt InterestIncomeSecuritiesTaxExempt	1756000
	us-gaap	Interest Income Securities Tax Exempt InterestIncomeSecuritiesTaxExempt	2766000
	us-gaap	Interest Income Securities Tax Exempt InterestIncomeSecuritiesTaxExempt	3358000
CY2019Q4	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	10221000
CY2018Q4	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	9641000
	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	20170000
	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	18944000
	us-gaap	Interest Paid Net InterestPaidNet	4371000
	us-gaap	Interest Paid Net InterestPaidNet	2693000
CY2018Q4	us-gaap	Interest Income Securities Mortgage Backed InterestIncomeSecuritiesMortgageBacked	1059000
CY2019Q4	us-gaap	Interest Income Securities Mortgage Backed InterestIncomeSecuritiesMortgageBacked	1261000
	us-gaap	Interest Income Securities Mortgage Backed InterestIncomeSecuritiesMortgageBacked	2505000
	us-gaap	Interest Income Securities Mortgage Backed InterestIncomeSecuritiesMortgageBacked	2173000
CY2019Q2	us-gaap	Interest Bearing Deposit Liabilities Domestic InterestBearingDepositLiabilitiesDomestic	1013100000
CY2019Q4	us-gaap	Interest Bearing Deposit Liabilities Domestic InterestBearingDepositLiabilitiesDomestic	1134558000
CY2019Q2	us-gaap	Interest Receivable InterestReceivable	5853000
CY2019Q4	us-gaap	Interest Receivable InterestReceivable	6810000
CY2018Q4	us-gaap	Investment Banking Advisory Brokerage And Underwriting Fees And Commissions InvestmentBankingAdvisoryBrokerageAndUnderwritingFeesAndCommissions	136000
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	251000
	us-gaap	Investment Banking Advisory Brokerage And Underwriting Fees And Commissions InvestmentBankingAdvisoryBrokerageAndUnderwritingFeesAndCommissions	313000
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	667000
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	208000
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	218000
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	1883000
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Remainder Of Fiscal Year LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear	281000
CY2019Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	176000
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	226000
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	283000
CY2019Q4	us-gaap	Labor And Related Expense LaborAndRelatedExpense	3992000
CY2018Q4	us-gaap	Labor And Related Expense LaborAndRelatedExpense	3677000
CY2019Q4	us-gaap	Liabilities Liabilities	1323405000
CY2019Q2	us-gaap	Liabilities Liabilities	1157093000
CY2019Q2	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	1269462000
CY2019Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	1443951000
CY2019Q2	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	13200000
CY2019Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	13984000
CY2018Q2	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	12024000
CY2019Q3	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	13444000
CY2018Q3	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	12308000
CY2018Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	12673000
CY2019Q2	us-gaap	Loans And Leases Receivable Before Fees Gross LoansAndLeasesReceivableBeforeFeesGross	798105000
CY2019Q4	us-gaap	Loans And Leases Receivable Before Fees Gross LoansAndLeasesReceivableBeforeFeesGross	864186000
CY2018Q4	us-gaap	Loans And Leases Receivable Impaired Interest Lost On Nonaccrual Loans LoansAndLeasesReceivableImpairedInterestLostOnNonaccrualLoans	58000
CY2019Q4	us-gaap	Loans And Leases Receivable Impaired Interest Lost On Nonaccrual Loans LoansAndLeasesReceivableImpairedInterestLostOnNonaccrualLoans	53000
	us-gaap	Loans And Leases Receivable Impaired Interest Lost On Nonaccrual Loans LoansAndLeasesReceivableImpairedInterestLostOnNonaccrualLoans	129000
	us-gaap	Loans And Leases Receivable Impaired Interest Lost On Nonaccrual Loans LoansAndLeasesReceivableImpairedInterestLostOnNonaccrualLoans	154000
CY2019Q4	us-gaap	Loans And Leases Receivable Net Reported Amount LoansAndLeasesReceivableNetReportedAmount	851065000
CY2019Q2	us-gaap	Loans And Leases Receivable Net Reported Amount LoansAndLeasesReceivableNetReportedAmount	785738000
CY2019Q2	us-gaap	Mortgage Loans In Process Of Foreclosure Amount MortgageLoansInProcessOfForeclosureAmount	1600000
CY2019Q4	us-gaap	Mortgage Loans In Process Of Foreclosure Amount MortgageLoansInProcessOfForeclosureAmount	1100000
	us-gaap	Nature Of Operations NatureOfOperations	<div style="font-family: 'Times New Roman'; font-size: 10pt;"><table cellpadding="0" cellspacing="0" class="DSPFListTable" style="font-family: 'Times New Roman'; font-size: 10pt; width: 100%; text-align: left; color: #000000;"><tr><td style="width: 36pt; vertical-align: top; align: right; font-weight: bold;">(2)</td><td style="width: auto; vertical-align: top; text-align: justify;"><div style="font-weight: bold;">Nature of Operations</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 16 full-service offices, an operations center and lending center located in its market area within the Hudson Valley Region 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. is 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	8907000
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-168822000
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-38101000
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	34635000
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	162575000
CY2019Q4	us-gaap	Net Income Loss NetIncomeLoss	5113000
CY2018Q4	us-gaap	Net Income Loss NetIncomeLoss	4584000
	us-gaap	Net Income Loss NetIncomeLoss	8964000
	us-gaap	Net Income Loss NetIncomeLoss	9976000
CY2018Q4	us-gaap	Noninterest Income NoninterestIncome	2141000
CY2019Q4	us-gaap	Noninterest Income NoninterestIncome	2316000
	us-gaap	Noninterest Income NoninterestIncome	4582000
	us-gaap	Noninterest Income NoninterestIncome	4193000
CY2019Q4	us-gaap	Noninterest Bearing Deposit Liabilities Domestic NoninterestBearingDepositLiabilitiesDomestic	110100000
CY2019Q2	us-gaap	Noninterest Bearing Deposit Liabilities Domestic NoninterestBearingDepositLiabilitiesDomestic	107469000
CY2018Q4	us-gaap	Noninterest Expense NoninterestExpense	6247000
CY2019Q4	us-gaap	Noninterest Expense NoninterestExpense	6535000
	us-gaap	Noninterest Expense NoninterestExpense	12208000
	us-gaap	Noninterest Expense NoninterestExpense	12957000
CY2019Q4	us-gaap	Number Of Stores NumberOfStores	16
CY2018Q4	us-gaap	Occupancy Net OccupancyNet	414000
CY2019Q4	us-gaap	Occupancy Net OccupancyNet	441000
	us-gaap	Occupancy Net OccupancyNet	907000
	us-gaap	Occupancy Net OccupancyNet	816000
CY2019Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P7Y7M13D
CY2019Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	1701000
	us-gaap	Operating Lease Cost OperatingLeaseCost	142000
CY2019Q4	us-gaap	Operating Lease Cost OperatingLeaseCost	70000
CY2019Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0251
	us-gaap	Operating Lease Payments OperatingLeasePayments	155000
CY2019Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	1707000
CY2019Q4	us-gaap	Other Than Temporary Impairment Loss Debt Securities Available For Sale OtherThanTemporaryImpairmentLossDebtSecuritiesAvailableForSale	0
CY2018Q4	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
	us-gaap	Other Than Temporary Impairment Loss Debt Securities Available For Sale OtherThanTemporaryImpairmentLossDebtSecuritiesAvailableForSale	0
CY2019Q4	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-114000
CY2018Q4	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	293000
	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	217000
CY2019Q4	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-40000
CY2018Q4	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	104000
	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	77000
CY2019Q4	us-gaap	Other Noninterest Expense OtherNoninterestExpense	595000
CY2018Q4	us-gaap	Other Noninterest Expense OtherNoninterestExpense	828000
	us-gaap	Other Noninterest Expense OtherNoninterestExpense	1401000
	us-gaap	Other Noninterest Expense OtherNoninterestExpense	1156000
CY2018Q4	us-gaap	Other Operating Income OtherOperatingIncome	180000
CY2019Q4	us-gaap	Other Operating Income OtherOperatingIncome	251000
	us-gaap	Other Operating Income OtherOperatingIncome	469000
	us-gaap	Other Operating Income OtherOperatingIncome	403000
CY2018Q4	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	293000
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	217000
	us-gaap	Payments For Proceeds From Federal Home Loan Bank Stock PaymentsForProceedsFromFederalHomeLoanBankStock	2328000
	us-gaap	Payments For Proceeds From Federal Home Loan Bank Stock PaymentsForProceedsFromFederalHomeLoanBankStock	1795000
	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	46916000
	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	67024000
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	0
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	38000
	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	124023000
	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	44462000
	us-gaap	Payments Of Dividends PaymentsOfDividends	1251000
	us-gaap	Payments Of Dividends PaymentsOfDividends	1376000
	us-gaap	Payments To Acquire Held To Maturity Securities PaymentsToAcquireHeldToMaturitySecurities	27916000
	us-gaap	Payments To Acquire Held To Maturity Securities PaymentsToAcquireHeldToMaturitySecurities	60251000
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	322000
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	380000
	us-gaap	Payments To Acquire Restricted Certificates Of Deposit PaymentsToAcquireRestrictedCertificatesOfDeposit	0
	us-gaap	Payments To Acquire Restricted Certificates Of Deposit PaymentsToAcquireRestrictedCertificatesOfDeposit	751000
CY2019Q4	us-gaap	Pledged Financial Instruments Not Separately Reported Securities Pledged PledgedFinancialInstrumentsNotSeparatelyReportedSecuritiesPledged	4500000
CY2019Q2	us-gaap	Pledged Financial Instruments Not Separately Reported Securities Pledged PledgedFinancialInstrumentsNotSeparatelyReportedSecuritiesPledged	1500000
CY2019Q2	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0
CY2019Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0
CY2019Q4	us-gaap	Preferred Stock Value PreferredStockValue	0
CY2019Q2	us-gaap	Preferred Stock Value PreferredStockValue	0
CY2019Q2	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	1000000
CY2019Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	1000000
CY2019Q4	us-gaap	Professional Fees ProfessionalFees	325000
	us-gaap	Professional Fees ProfessionalFees	612000
	us-gaap	Professional Fees ProfessionalFees	604000
CY2019Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	13273000
CY2019Q2	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	13255000
CY2018Q4	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	354000
CY2019Q4	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	690000
	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	1241000
	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	708000
	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	1840000
CY2019Q4	us-gaap	Real Estate Acquired Through Foreclosure RealEstateAcquiredThroughForeclosure	303000
CY2019Q2	us-gaap	Real Estate Acquired Through Foreclosure RealEstateAcquiredThroughForeclosure	53000
	us-gaap	Repayments Of Federal Home Loan Bank Borrowings RepaymentsOfFederalHomeLoanBankBorrowings	1000000
	us-gaap	Repayments Of Federal Home Loan Bank Borrowings RepaymentsOfFederalHomeLoanBankBorrowings	3000000
CY2019Q2	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	101774000
	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
CY2018Q4	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 And Maturity Of Available For Sale Securities ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities	48092000
	us-gaap	Proceeds From Sale And Maturity Of Available For Sale Securities ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities	56351000
	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	8286000
CY2018Q4	us-gaap	Professional Fees ProfessionalFees	283000
CY2019Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	110374000
CY2019Q4	us-gaap	Stockholders Equity StockholdersEquity	120546000
CY2019Q2	us-gaap	Stockholders Equity StockholdersEquity	112369000
CY2018Q2	us-gaap	Stockholders Equity StockholdersEquity	96191000
CY2018Q3	us-gaap	Stockholders Equity StockholdersEquity	99641000
CY2019Q3	us-gaap	Stockholders Equity StockholdersEquity	116529000
CY2018Q4	us-gaap	Stockholders Equity StockholdersEquity	104121000
	us-gaap	Transfer To Other Real Estate TransferToOtherRealEstate	215000
	us-gaap	Transfer To Other Real Estate TransferToOtherRealEstate	34000
CY2019Q2	us-gaap	Treasury Stock Shares TreasuryStockShares	73526
CY2019Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	74926
	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	38000
CY2019Q4	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	38000
CY2019Q4	us-gaap	Treasury Stock Value TreasuryStockValue	315000
CY2019Q2	us-gaap	Treasury Stock Value TreasuryStockValue	277000
CY2019Q2	us-gaap	Unamortized Loan Commitment And Origination Fees And Unamortized Discounts Or Premiums UnamortizedLoanCommitmentAndOriginationFeesAndUnamortizedDiscountsOrPremiums	833000
CY2019Q4	us-gaap	Unamortized Loan Commitment And Origination Fees And Unamortized Discounts Or Premiums UnamortizedLoanCommitmentAndOriginationFeesAndUnamortizedDiscountsOrPremiums	863000
	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>
	us-gaap	Variable Lease Cost VariableLeaseCost	20000
CY2019Q4	us-gaap	Variable Lease Cost VariableLeaseCost	10000
CY2018Q4	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	0
	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 Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	0
CY2018Q4	us-gaap	Weighted Average Number Of Share Outstanding Basic And Diluted WeightedAverageNumberOfShareOutstandingBasicAndDiluted	8537814
CY2019Q4	us-gaap	Weighted Average Number Of Share Outstanding Basic And Diluted WeightedAverageNumberOfShareOutstandingBasicAndDiluted	8537010
	us-gaap	Weighted Average Number Of Share Outstanding Basic And Diluted WeightedAverageNumberOfShareOutstandingBasicAndDiluted	8537814
	us-gaap	Weighted Average Number Of Share Outstanding Basic And Diluted WeightedAverageNumberOfShareOutstandingBasicAndDiluted	8537412
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	8537814
CY2019Q4	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	8537010
CY2018Q4	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	8537814
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	8537412
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	8537412
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	8537814
CY2019Q4	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	8537010
CY2018Q4	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	8537814
	gcbc	Number Of Loan Portfolio Segments NumberOfLoanPortfolioSegments	4
CY2019Q4	gcbc	Number Of Subsidiaries NumberOfSubsidiaries	2
	gcbc	Interest Income That Was Recorded On Nonaccrual Loans During Period InterestIncomeThatWasRecordedOnNonaccrualLoansDuringPeriod	55000
CY2018Q4	gcbc	Interest Income That Was Recorded On Nonaccrual Loans During Period InterestIncomeThatWasRecordedOnNonaccrualLoansDuringPeriod	23000
CY2019Q4	gcbc	Interest Income That Was Recorded On Nonaccrual Loans During Period InterestIncomeThatWasRecordedOnNonaccrualLoansDuringPeriod	42000
	gcbc	Interest Income That Was Recorded On Nonaccrual Loans During Period InterestIncomeThatWasRecordedOnNonaccrualLoansDuringPeriod	92000
CY2019Q4	gcbc	Nonaccrual Loans Making Payments Pursuant To Forbearance Agreements NonaccrualLoansMakingPaymentsPursuantToForbearanceAgreements	151000
CY2019Q4	gcbc	Nonaccrual Loans With Recent History Of Delinquency Greater Than90 Days NonaccrualLoansWithRecentHistoryOfDelinquencyGreaterThan90Days	1200000
CY2019Q2	gcbc	Nonaccrual Loans With Recent History Of Delinquency Greater Than90 Days NonaccrualLoansWithRecentHistoryOfDelinquencyGreaterThan90Days	1800000
	gcbc	Securities Available For Sale Principal Payments On Securities SecuritiesAvailableForSalePrincipalPaymentsOnSecurities	2003000
	gcbc	Securities Available For Sale Principal Payments On Securities SecuritiesAvailableForSalePrincipalPaymentsOnSecurities	5054000
	gcbc	Securities Held To Maturities Principal Payments On Securities SecuritiesHeldToMaturitiesPrincipalPaymentsOnSecurities	17138000
	gcbc	Securities Held To Maturities Principal Payments On Securities SecuritiesHeldToMaturitiesPrincipalPaymentsOnSecurities	13586000
CY2018Q4	gcbc	Computer Software Supplies And Support ComputerSoftwareSuppliesAndSupport	200000
CY2019Q4	gcbc	Computer Software Supplies And Support ComputerSoftwareSuppliesAndSupport	264000
	gcbc	Computer Software Supplies And Support ComputerSoftwareSuppliesAndSupport	423000
	gcbc	Computer Software Supplies And Support ComputerSoftwareSuppliesAndSupport	506000
CY2018Q4	gcbc	Interest Bearing Deposits And Federal Funds Sold InterestBearingDepositsAndFederalFundsSold	28000
CY2019Q4	gcbc	Interest Bearing Deposits And Federal Funds Sold InterestBearingDepositsAndFederalFundsSold	207000
	gcbc	Interest Bearing Deposits And Federal Funds Sold InterestBearingDepositsAndFederalFundsSold	405000
	gcbc	Interest Bearing Deposits And Federal Funds Sold InterestBearingDepositsAndFederalFundsSold	59000
CY2018Q4	gcbc	Service Charges On Deposit Accounts ServiceChargesOnDepositAccounts	1106000
CY2019Q4	gcbc	Service Charges On Deposit Accounts ServiceChargesOnDepositAccounts	1111000
	gcbc	Service Charges On Deposit Accounts ServiceChargesOnDepositAccounts	2143000
	gcbc	Service Charges On Deposit Accounts ServiceChargesOnDepositAccounts	2236000
CY2018Q4	gcbc	E Commerce Fees ECommerceFees	34000
CY2019Q4	gcbc	E Commerce Fees ECommerceFees	31000
	gcbc	E Commerce Fees ECommerceFees	66000
	gcbc	E Commerce Fees ECommerceFees	71000
CY2019Q4	gcbc	Debit Card Fees DebitCardFees	755000
CY2018Q4	gcbc	Debit Card Fees DebitCardFees	685000
	gcbc	Debit Card Fees DebitCardFees	1498000
	gcbc	Debit Card Fees DebitCardFees	1325000
CY2019Q2	gcbc	Federal Home Loan Bank Short Term Or Overnight Borrowings FederalHomeLoanBankShortTermOrOvernightBorrowings	8000000
CY2019Q4	gcbc	Federal Home Loan Bank Short Term Or Overnight Borrowings FederalHomeLoanBankShortTermOrOvernightBorrowings	48900000
CY2019Q4	gcbc	Debt Securities Available For Sale And Held To Maturity Amortized Cost DebtSecuritiesAvailableForSaleAndHeldToMaturityAmortizedCost	524383000
CY2019Q2	gcbc	Debt Securities Available For Sale And Held To Maturity Amortized Cost DebtSecuritiesAvailableForSaleAndHeldToMaturityAmortizedCost	425810000
CY2019Q2	gcbc	Debt Securities Available For Sale And Held To Maturity Fair Value DebtSecuritiesAvailableForSaleAndHeldToMaturityFairValue	436341000
CY2019Q4	gcbc	Debt Securities Available For Sale And Held To Maturity Fair Value DebtSecuritiesAvailableForSaleAndHeldToMaturityFairValue	536895000
CY2019Q4	gcbc	Debt Securities Available For Sale And Held To Maturity Accumulated Unrecognized Gain DebtSecuritiesAvailableForSaleAndHeldToMaturityAccumulatedUnrecognizedGain	12927000
CY2019Q2	gcbc	Debt Securities Available For Sale And Held To Maturity Accumulated Unrecognized Gain DebtSecuritiesAvailableForSaleAndHeldToMaturityAccumulatedUnrecognizedGain	10630000
CY2019Q2	gcbc	Debt Securities Available For Sale And Held To Maturity Accumulated Unrecognized Loss DebtSecuritiesAvailableForSaleAndHeldToMaturityAccumulatedUnrecognizedLoss	99000
CY2019Q4	gcbc	Debt Securities Available For Sale And Held To Maturity Accumulated Unrecognized Loss DebtSecuritiesAvailableForSaleAndHeldToMaturityAccumulatedUnrecognizedLoss	415000
	gcbc	Number Of Categories Utilized Under Risk Management Approach Of Diversified Investing NumberOfCategoriesUtilizedUnderRiskManagementApproachOfDiversifiedInvesting	3
CY2019Q2	gcbc	Held To Maturity Securities In Unrealized Loss Positions Qualitative Disclosure Number Of Positions Greater Than Or Equal To One Year HeldToMaturitySecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositionsGreaterThanOrEqualToOneYear	18
CY2019Q4	gcbc	Held To Maturity Securities In Unrealized Loss Positions Qualitative Disclosure Number Of Positions Greater Than Or Equal To One Year HeldToMaturitySecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositionsGreaterThanOrEqualToOneYear	16
CY2019Q2	gcbc	Number Of Securities Unrealized Loss Position NumberOfSecuritiesUnrealizedLossPosition	42
CY2019Q4	gcbc	Number Of Securities Unrealized Loss Position NumberOfSecuritiesUnrealizedLossPosition	118
CY2019Q4	gcbc	Securities Continuous Unrealized Loss Positions Accumulated Loss SecuritiesContinuousUnrealizedLossPositionsAccumulatedLoss	415000
CY2019Q2	gcbc	Securities Continuous Unrealized Loss Positions Accumulated Loss SecuritiesContinuousUnrealizedLossPositionsAccumulatedLoss	99000
CY2019Q4	gcbc	Securities Continuous Unrealized Loss Positions Fair Value SecuritiesContinuousUnrealizedLossPositionsFairValue	44951000
CY2019Q2	gcbc	Securities Continuous Unrealized Loss Positions Fair Value SecuritiesContinuousUnrealizedLossPositionsFairValue	13995000
CY2019Q2	gcbc	Securities Continuous Unrealized Loss Position Accumulated Loss SecuritiesContinuousUnrealizedLossPositionAccumulatedLoss	43000
CY2019Q4	gcbc	Securities Continuous Unrealized Loss Position Accumulated Loss SecuritiesContinuousUnrealizedLossPositionAccumulatedLoss	385000
CY2019Q4	gcbc	Number Of Securities Unrealized Loss Position Twelve Months Or Longer NumberOfSecuritiesUnrealizedLossPositionTwelveMonthsOrLonger	17
CY2019Q2	gcbc	Number Of Securities Unrealized Loss Position Twelve Months Or Longer NumberOfSecuritiesUnrealizedLossPositionTwelveMonthsOrLonger	18
CY2019Q4	gcbc	Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value SecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	4315000
CY2019Q2	gcbc	Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value SecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	8348000
CY2019Q4	gcbc	Number Of Securities Unrealized Loss Position Less Than Twelve Months NumberOfSecuritiesUnrealizedLossPositionLessThanTwelveMonths	101
CY2019Q2	gcbc	Number Of Securities Unrealized Loss Position Less Than Twelve Months NumberOfSecuritiesUnrealizedLossPositionLessThanTwelveMonths	24
CY2019Q2	gcbc	Held To Maturity Securities In Unrealized Loss Positions Qualitative Disclosure Number Of Positions Less Than One Year HeldToMaturitySecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositionsLessThanOneYear	23
CY2019Q4	gcbc	Held To Maturity Securities In Unrealized Loss Positions Qualitative Disclosure Number Of Positions Less Than One Year HeldToMaturitySecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositionsLessThanOneYear	94
CY2019Q4	gcbc	Securities Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss SecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	30000
CY2019Q2	gcbc	Securities Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss SecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	56000
CY2019Q4	gcbc	Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value SecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	40636000
CY2019Q2	gcbc	Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value SecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	5647000

Files In Submission

Name	View Source	Status
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0001140361-20-002466-index.html	Edgar Link	pending
0001140361-20-002466.txt	Edgar Link	pending
0001140361-20-002466-xbrl.zip	Edgar Link	pending
ex31_1.htm	Edgar Link	pending
ex31_2.htm	Edgar Link	pending
ex32_1.htm	Edgar Link	pending
ex32_2.htm	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xlsx	Edgar Link	pending
form10q.htm	Edgar Link	pending
gcbc-20191231.xml	Edgar Link	completed
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$GCBC
GREENE COUNTY BANCORP INC Stock $gcbc

2019 Q4 Form 10-Q Financial Statement

#000114036120002466 Filed on February 06, 2020

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$GCBC GREENE COUNTY BANCORP INC Stock $gcbc

2019 Q4 Form 10-Q Financial Statement

#000114036120002466 Filed on February 06, 2020

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$GCBC
GREENE COUNTY BANCORP INC Stock $gcbc