FAIR VALUE - Carrying and Fair Values (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Jun. 30, 2024	Jun. 30, 2023
Financial assets
Cash and cash equivalents	$ 96,521	$ 165,190	$ 150,478
Securities available for sale	321,537	257,409
Securities available for sale			431,667
Securities held to maturity	22,457	22,437	21,744
Equity securities			2,413
FHLBNY and FRBNY stock	5,283	3,546	1,196
Net loans receivable			1,144,169
Net loans receivable	1,434,575	1,344,069
Accrued interest receivable	$ 7,937	$ 7,559	$ 7,194
Derivative Asset, Statement of Financial Position [Extensible Enumeration]	Other Assets	Other Assets	Other Assets
Financial liabilities
Derivative Liability, Statement of Financial Position [Extensible Enumeration]	Other Liabilities	Other Liabilities	Other Liabilities
Level 1
Financial assets
Cash and cash equivalents	$ 96,521	$ 165,190	$ 150,478
Securities available for sale	216,706	243,549
Securities available for sale			377,729
Equity securities			2,413
Level 2
Financial assets
Securities available for sale	104,831	13,860
Securities available for sale			53,938
Securities held to maturity	22,457	22,437	21,744
FHLBNY and FRBNY stock	5,283	3,546	1,196
Accrued interest receivable	7,937	7,559	7,194
Derivative assets	13,735	16,781	18,844
Financial liabilities
Savings, money market, and demand accounts	1,411,385	1,383,222	1,424,874
Time deposits	173,881	165,420	114,596
Mortgagors' escrow deposits	8,097	9,701	7,888
FHLB advances	39,995
Accrued interest payable	143	137	84
Derivative liabilities	13,735	16,781	18,844
Level 3
Financial assets
Net loans receivable			1,095,366
Net loans receivable	1,373,719	1,293,472
Carrying amount
Financial assets
Cash and cash equivalents	96,521	165,190	150,478
Securities available for sale	321,537	257,409
Securities available for sale			431,667
Securities held to maturity	25,400	25,090	23,949
Equity securities			2,413
FHLBNY and FRBNY stock	5,283	3,546	1,196
Net loans receivable			1,144,169
Net loans receivable	1,434,575	1,344,069
Accrued interest receivable	7,937	7,559	7,194
Derivative assets	13,735	16,781	18,844
Financial liabilities
Savings, money market, and demand accounts	1,411,385	1,383,222	1,424,874
Time deposits	174,798	167,030	116,977
Mortgagors' escrow deposits	8,097	9,701	7,888
FHLB advances	40,000
Accrued interest payable	143	137	84
Derivative liabilities	13,735	16,781	18,844
Fair value
Financial assets
Cash and cash equivalents	96,521	165,190	150,478
Securities available for sale	321,537	257,409
Securities available for sale			431,667
Securities held to maturity	22,457	22,437	21,744
Equity securities			2,413
FHLBNY and FRBNY stock	5,283	3,546	1,196
Net loans receivable			1,095,366
Net loans receivable	1,373,719	1,293,472
Accrued interest receivable	7,937	7,559	7,194
Derivative assets	13,735	16,781	18,844
Financial liabilities
Savings, money market, and demand accounts	1,411,385	1,383,222	1,424,874
Time deposits	173,881	165,420	114,596
Mortgagors' escrow deposits	8,097	9,701	7,888
FHLB advances	39,995
Accrued interest payable	143	137	84
Derivative liabilities	$ 13,735	$ 16,781	$ 18,844