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LOANS RECEIVABLE - Schedule of Loans Receivable (Details) - USD ($) $ in Thousands | Sep. 30, 2023 | Jun. 30, 2023
--- | --- | ---
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss, fee and loan in process | $ 5,760,475 | $ 5,850,476
Unaccreted yield adjustments | (24,426) | (21,055)
Loans receivable | 5,736,049 | 5,829,421
Commercial |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss, fee and loan in process | 4,025,884 | 4,103,819
Commercial | Multi-family mortgage |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss, fee and loan in process | 2,699,151 | 2,761,775
Commercial | Nonresidential mortgage |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss, fee and loan in process | 946,801 | 968,574
Commercial | Commercial business |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss, fee and loan in process | 149,229 | 146,861
Commercial | Construction |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss, fee and loan in process | 230,703 | 226,609
Residential |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss, fee and loan in process | 1,689,051 | 1,700,559
Consumer |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss, fee and loan in process | 45,540 | 46,098
Consumer | Home equity loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss, fee and loan in process | 42,896 | 43,549
Consumer | Other consumer |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss, fee and loan in process | $ 2,644 | $ 2,549

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