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LOANS RECEIVABLE - Performance Status of Loans Receivable (Details) - USD ($) $ in Thousands	Mar. 31, 2025	Jun. 30, 2024
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, before allowance for credit loss, fee and loan in process	$ 5,850,449	$ 5,748,750
Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, before allowance for credit loss, fee and loan in process	4,036,426	3,945,910
Residential
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, before allowance for credit loss, fee and loan in process	1,761,465	1,756,051
Consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, before allowance for credit loss, fee and loan in process	52,558	46,789
Nonperforming
Financing Receivable, Recorded Investment, Past Due [Line Items]
90 Days and Over Past Due Accruing	0	0
Nonaccrual Loans with Allowance for Credit Losses	2,562	8,704
Nonaccrual Loans with no Allowance for Credit Losses	35,121	31,178
Financing receivable, before allowance for credit loss, fee and loan in process	37,683	39,882
Nonperforming | Residential
Financing Receivable, Recorded Investment, Past Due [Line Items]
90 Days and Over Past Due Accruing	0	0
Nonaccrual Loans with Allowance for Credit Losses	801	2,295
Nonaccrual Loans with no Allowance for Credit Losses	4,375	4,410
Financing receivable, before allowance for credit loss, fee and loan in process	5,176	6,705
Performing
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, before allowance for credit loss, fee and loan in process	5,812,766	5,708,868
Performing | Residential
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, before allowance for credit loss, fee and loan in process	1,756,289	1,749,346
Multi-family mortgage | Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, before allowance for credit loss, fee and loan in process	2,733,406	2,645,851
Multi-family mortgage | Nonperforming | Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
90 Days and Over Past Due Accruing	0	0
Nonaccrual Loans with Allowance for Credit Losses	1,245	0
Nonaccrual Loans with no Allowance for Credit Losses	23,542	22,591
Financing receivable, before allowance for credit loss, fee and loan in process	24,787	22,591
Multi-family mortgage | Performing | Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, before allowance for credit loss, fee and loan in process	2,708,619	2,623,260
Nonresidential mortgage | Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, before allowance for credit loss, fee and loan in process	988,074	948,075
Nonresidential mortgage | Nonperforming | Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
90 Days and Over Past Due Accruing	0	0
Nonaccrual Loans with Allowance for Credit Losses	0	5,695
Nonaccrual Loans with no Allowance for Credit Losses	5,793	4,128
Financing receivable, before allowance for credit loss, fee and loan in process	5,793	9,823
Nonresidential mortgage | Performing | Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, before allowance for credit loss, fee and loan in process	982,281	938,252
Commercial business | Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, before allowance for credit loss, fee and loan in process	140,224	142,747
Commercial business | Nonperforming | Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
90 Days and Over Past Due Accruing	0	0
Nonaccrual Loans with Allowance for Credit Losses	516	714
Nonaccrual Loans with no Allowance for Credit Losses	1,283	0
Financing receivable, before allowance for credit loss, fee and loan in process	1,799	714
Commercial business | Performing | Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, before allowance for credit loss, fee and loan in process	138,425	142,033
Construction | Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, before allowance for credit loss, fee and loan in process	174,722	209,237
Construction | Nonperforming | Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
90 Days and Over Past Due Accruing	0	0
Nonaccrual Loans with Allowance for Credit Losses	0	0
Nonaccrual Loans with no Allowance for Credit Losses	0	0
Financing receivable, before allowance for credit loss, fee and loan in process	0	0
Construction | Performing | Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, before allowance for credit loss, fee and loan in process	174,722	209,237
Home equity loans | Consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, before allowance for credit loss, fee and loan in process	49,699	44,104
Home equity loans | Nonperforming | Consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
90 Days and Over Past Due Accruing	0	0
Nonaccrual Loans with Allowance for Credit Losses	0	0
Nonaccrual Loans with no Allowance for Credit Losses	125	44
Financing receivable, before allowance for credit loss, fee and loan in process	125	44
Home equity loans | Performing | Consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, before allowance for credit loss, fee and loan in process	49,574	44,060
Other consumer | Consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, before allowance for credit loss, fee and loan in process	2,859	2,685
Other consumer | Nonperforming | Consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
90 Days and Over Past Due Accruing	0	0
Nonaccrual Loans with Allowance for Credit Losses	0	0
Nonaccrual Loans with no Allowance for Credit Losses	3	5
Financing receivable, before allowance for credit loss, fee and loan in process	3	5
Other consumer | Performing | Consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, before allowance for credit loss, fee and loan in process	$ 2,856	$ 2,680

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Amortized cost, before allowance for credit loss, fee, and loan in process, of financing receivable. Excludes financing receivable covered under loss sharing agreement and net investment in lease.

+ References

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