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FAIR VALUE OF FINANCIAL INSTRUMENTS - Schedule of Assets Measured at Fair Value on a Non-recurring Basis (Details) - USD ($) $ in Thousands | Sep. 30, 2023 | Jun. 30, 2023
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Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Assets, fair value | $ 1,295,924 | $ 1,299,353
Fair Value, Measurements, Nonrecurring |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Net loans receivable | 14,170 | 17,721
Assets, fair value | 12,956 | 12,956
Fair Value, Measurements, Nonrecurring | Residential |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Net loans receivable | 449 | 449
Assets, fair value | 0 |
Fair Value, Measurements, Nonrecurring | Commercial | Multi-family mortgage |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Net loans receivable | 4,554 | 7,300
Fair Value, Measurements, Nonrecurring | Commercial | Nonresidential mortgage |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Net loans receivable | 9,167 | 9,972
Assets, fair value | 12,956 | 12,956
Quoted Prices in Active Markets for Identical Assets (Level 1) |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Assets, fair value | 0 | 0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Fair Value, Measurements, Nonrecurring |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Net loans receivable | 0 | 0
Assets, fair value | 0 | 0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Fair Value, Measurements, Nonrecurring | Residential |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Net loans receivable | 0 | 0
Assets, fair value | 0 |
Quoted Prices in Active Markets for Identical Assets (Level 1) | Fair Value, Measurements, Nonrecurring | Commercial | Multi-family mortgage |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Net loans receivable | 0 | 0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Fair Value, Measurements, Nonrecurring | Commercial | Nonresidential mortgage |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Net loans receivable | 0 | 0
Assets, fair value | 0 | 0
Significant Other Observable Inputs (Level 2) |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Assets, fair value | 1,295,924 | 1,299,353
Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Nonrecurring |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Net loans receivable | 0 | 0
Assets, fair value | 0 | 0
Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Nonrecurring | Residential |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Net loans receivable | 0 | 0
Assets, fair value | 0 |
Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Nonrecurring | Commercial | Multi-family mortgage |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Net loans receivable | 0 | 0
Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Nonrecurring | Commercial | Nonresidential mortgage |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Net loans receivable | 0 | 0
Assets, fair value | 0 | 0
Significant Unobservable Inputs (Level 3) |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Net loans receivable | 14,170 | 17,721
Assets, fair value | 0 | 0
Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Nonrecurring |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Net loans receivable | 14,170 | 17,721
Assets, fair value | 12,956 | 12,956
Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Nonrecurring | Residential |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Net loans receivable | 449 | 449
Assets, fair value | 0 |
Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Nonrecurring | Commercial | Multi-family mortgage |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Net loans receivable | 4,554 | 7,300
Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Nonrecurring | Commercial | Nonresidential mortgage |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Net loans receivable | 9,167 | 9,972
Assets, fair value | $ 12,956 | $ 12,956

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