FAIR VALUE - Carrying and Fair Values (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Jun. 30, 2023
Financial assets
Cash and cash equivalents	$ 246,541	$ 150,478
Securities available for sale, at fair value	296,893
Securities available for sale		431,667
Securities held to maturity	20,793	21,744
Equity securities		2,413
FHLBNY stock	1,421	1,196
Net loans receivable		1,144,169
Net loans receivable	1,312,189
Accrued interest receivable	$ 7,688	$ 7,194
Derivative Asset, Statement of Financial Position [Extensible Enumeration]	Other Assets	Other Assets
Financial liabilities
Derivative Liability, Statement of Financial Position [Extensible Enumeration]	Other Liabilities	Other Liabilities
Level 1
Financial assets
Cash and cash equivalents	$ 246,541	$ 150,478
Securities available for sale, at fair value	271,785
Securities available for sale		377,729
Equity securities		2,413
Level 2
Financial assets
Securities available for sale, at fair value	25,108
Securities available for sale		53,938
Securities held to maturity	20,793	21,744
FHLBNY stock	1,421	1,196
Accrued interest receivable	7,688	7,194
Derivative assets	136	684
Financial liabilities
Savings, money market, and demand accounts	1,505,866	1,424,874
Time deposits	140,824	114,596
Mortgagors' escrow deposits	5,983	7,888
Accrued interest payable	105	84
Derivative liabilities	17,220	18,828
Level 3
Financial assets
Net loans receivable		1,095,366
Net loans receivable	1,259,330
Carrying amount
Financial assets
Cash and cash equivalents	246,541	150,478
Securities available for sale, at fair value	296,893
Securities available for sale		431,667
Securities held to maturity	23,317	23,949
Equity securities		2,413
FHLBNY stock	1,421	1,196
Net loans receivable		1,144,169
Net loans receivable	1,312,189
Accrued interest receivable	7,688	7,194
Derivative assets	136	684
Financial liabilities
Savings, money market, and demand accounts	1,505,866	1,424,874
Time deposits	142,144	116,977
Mortgagors' escrow deposits	5,983	7,888
Accrued interest payable	105	84
Derivative liabilities	17,220	18,828
Fair value
Financial assets
Cash and cash equivalents	246,541	150,478
Securities available for sale, at fair value	296,893
Securities available for sale		431,667
Securities held to maturity	20,793	21,744
Equity securities		2,413
FHLBNY stock	1,421	1,196
Net loans receivable		1,095,366
Net loans receivable	1,259,330
Accrued interest receivable	7,688	7,194
Derivative assets	136	684
Financial liabilities
Savings, money market, and demand accounts	1,505,866	1,424,874
Time deposits	140,824	114,596
Mortgagors' escrow deposits	5,983	7,888
Accrued interest payable	105	84
Derivative liabilities	$ 17,220	$ 18,828