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LOANS RECEIVABLE - Performance Status of Loans Receivable (Details) - USD ($) $ in Thousands | Sep. 30, 2023 | Jun. 30, 2023
--- | --- | ---
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing receivable, before allowance for credit loss, fee and loan in process | $ 5,760,475 | $ 5,850,476
Commercial |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing receivable, before allowance for credit loss, fee and loan in process | 4,025,884 | 4,103,819
Residential |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing receivable, before allowance for credit loss, fee and loan in process | 1,689,051 | 1,700,559
Consumer |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing receivable, before allowance for credit loss, fee and loan in process | 45,540 | 46,098
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 | 14,039 | 19,212
Nonaccrual Loans with no Allowance for Credit Losses | 23,873 | 23,415
Financing receivable, before allowance for credit loss, fee and loan in process | 37,912 | 42,627
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 | 1,041 | 1,640
Nonaccrual Loans with no Allowance for Credit Losses | 5,200 | 5,031
Financing receivable, before allowance for credit loss, fee and loan in process | 6,241 | 6,671
Performing |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing receivable, before allowance for credit loss, fee and loan in process | 5,722,563 | 5,807,849
Performing | Residential |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing receivable, before allowance for credit loss, fee and loan in process | 1,682,810 | 1,693,888
Multi-family mortgage | Commercial |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing receivable, before allowance for credit loss, fee and loan in process | 2,699,151 | 2,761,775
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 | 2,958 | 5,686
Nonaccrual Loans with no Allowance for Credit Losses | 13,308 | 13,428
Financing receivable, before allowance for credit loss, fee and loan in process | 16,266 | 19,114
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 | 2,682,885 | 2,742,661
Nonresidential mortgage | Commercial |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing receivable, before allowance for credit loss, fee and loan in process | 946,801 | 968,574
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 | 9,783 | 11,815
Nonaccrual Loans with no Allowance for Credit Losses | 5,138 | 4,725
Financing receivable, before allowance for credit loss, fee and loan in process | 14,921 | 16,540
Nonresidential mortgage | Performing | Commercial |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing receivable, before allowance for credit loss, fee and loan in process | 931,880 | 952,034
Commercial business | Commercial |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing receivable, before allowance for credit loss, fee and loan in process | 149,229 | 146,861
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 | 257 | 71
Nonaccrual Loans with no Allowance for Credit Losses | 180 | 181
Financing receivable, before allowance for credit loss, fee and loan in process | 437 | 252
Commercial business | Performing | Commercial |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing receivable, before allowance for credit loss, fee and loan in process | 148,792 | 146,609
Construction | Commercial |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing receivable, before allowance for credit loss, fee and loan in process | 230,703 | 226,609
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 | 230,703 | 226,609
Home equity loans | Consumer |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing receivable, before allowance for credit loss, fee and loan in process | 42,896 | 43,549
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 | 47 | 50
Financing receivable, before allowance for credit loss, fee and loan in process | 47 | 50
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 | 42,849 | 43,499
Other consumer | Consumer |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing receivable, before allowance for credit loss, fee and loan in process | 2,644 | 2,549
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 | 0 | 0
Financing receivable, before allowance for credit loss, fee and loan in process | 0 | 0
Other consumer | Performing | Consumer |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing receivable, before allowance for credit loss, fee and loan in process | $ 2,644 | $ 2,549

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