v3.25.2
Condensed Financial Statements of Greene County Bancorp, Inc. - Condensed Statements of Income (Details) - Parent Company [Member] - USD ($)
$ in Thousands
 12 Months Ended
Jun. 30, 2025
Jun. 30, 2024
INCOME:    
Equity in undistributed net income of subsidiaries $ 18,401 $ 19,096
Dividend distributed by subsidiary $ 15,000 $ 8,000
Investment, Issuer Affiliation [Extensible Enumeration] us-gaap:InvestmentsInMajorityOwnedSubsidiariesMember us-gaap:InvestmentsInMajorityOwnedSubsidiariesMember
Interest-earning deposits $ 19 $ 13
Other income 0 15
Total Income 33,420 27,124
OPERATING EXPENSES:    
Legal fees 94 98
Interest on borrowings 1,850 1,850
Other expense 338 407
Total operating expenses 2,282 2,355
Net income $ 31,138 $ 24,769