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FAIR VALUE OF FINANCIAL INSTRUMENTS - Schedule of Carrying Amounts and Fair Values of Financial Instruments (Details) - USD ($) $ in Thousands | Sep. 30, 2024 | Jun. 30, 2024
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Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Investment securities available for sale | $ 1,070,811 | $ 1,072,833
Investment securities held to maturity | 132,256 | 135,742
Loans held-for-sale | 8,866 | 6,036
Net loans receivable | 5,739,323 | 5,687,848
Accrued interest receivable | 29,467 | 29,521
Fair Value | 23,331 | 54,362
Interest rate contracts | 9,136 | 0
Quoted Prices in Active Markets for Identical Assets (Level 1) |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Cash and cash equivalents | 155,574 | 63,864
Investment securities available for sale | 0 | 0
Investment securities held to maturity | 0 | 0
Loans held-for-sale | 0 | 0
Net loans receivable | 0 | 0
FHLB Stock | 0 | 0
Accrued interest receivable | 32 | 11
Fair Value | 0 | 0
Borrowings | 0 | 0
Interest payable on deposits | 3,286 | 3,397
Interest payable on borrowings | 0 | 0
Interest rate contracts | 0 |
Quoted Prices in Active Markets for Identical Assets (Level 1) | Deposits other than certificates of deposits |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Deposits | 3,521,493 | 3,550,762
Quoted Prices in Active Markets for Identical Assets (Level 1) | Certificates of deposits |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Deposits | 0 | 0
Significant Other Observable Inputs (Level 2) |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Cash and cash equivalents | 0 | 0
Investment securities available for sale | 1,070,811 | 1,072,833
Investment securities held to maturity | 120,725 | 119,278
Loans held-for-sale | 9,046 | 6,077
Net loans receivable | 0 | 0
FHLB Stock | 0 | 0
Accrued interest receivable | 8,896 | 8,986
Fair Value | 23,331 | 54,362
Borrowings | 0 | 0
Interest payable on deposits | 0 | 0
Interest payable on borrowings | 0 | 0
Interest rate contracts | 9,136 |
Significant Other Observable Inputs (Level 2) | Deposits other than certificates of deposits |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Deposits | 0 | 0
Significant Other Observable Inputs (Level 2) | Certificates of deposits |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Deposits | 0 | 0
Significant Unobservable Inputs (Level 3) |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Cash and cash equivalents | 0 | 0
Investment securities available for sale | 0 | 0
Investment securities held to maturity | 0 | 0
Loans held-for-sale | 0 | 0
Net loans receivable | 5,289,412 | 5,114,459
FHLB Stock | 0 | 0
Accrued interest receivable | 20,539 | 20,524
Fair Value | 0 | 0
Borrowings | 1,481,326 |
Interest payable on deposits | 4,207 |
Interest payable on borrowings | 7,578 |
Interest rate contracts | 0 |
Significant Unobservable Inputs (Level 3) | Deposits other than certificates of deposits |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Deposits | 0 | 0
Significant Unobservable Inputs (Level 3) | Certificates of deposits |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Deposits | 1,945,367 | 1,597,939
Carrying Amount |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Cash and cash equivalents | 155,574 | 63,864
Investment securities available for sale | 1,070,811 | 1,072,833
Investment securities held to maturity | 132,256 | 135,742
Loans held-for-sale | 8,866 | 6,036
Net loans receivable | 5,739,323 | 5,687,848
FHLB Stock | 57,706 | 80,300
Accrued interest receivable | 29,467 | 29,521
Fair Value | 23,331 | 54,362
Borrowings | 1,479,888 | 1,709,789
Interest payable on deposits | 7,493 | 5,662
Interest payable on borrowings | 7,578 | 7,784
Interest rate contracts | 9,136 |
Carrying Amount | Deposits other than certificates of deposits |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Deposits | 3,521,493 | 3,550,762
Carrying Amount | Certificates of deposits |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Deposits | 1,949,019 | 1,607,361
Fair Value |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Cash and cash equivalents | 155,574 | 63,864
Investment securities available for sale | 1,070,811 | 1,072,833
Investment securities held to maturity | 120,725 | 119,278
Loans held-for-sale | 9,046 | 6,077
Net loans receivable | 5,289,412 | 5,114,459
FHLB Stock | 0 | 0
Accrued interest receivable | 29,467 | 29,521
Fair Value | 23,331 | 54,362
Borrowings | 1,481,326 | 1,703,924
Interest payable on deposits | 7,493 | 5,662
Interest payable on borrowings | 7,578 | 7,784
Interest rate contracts | 9,136 |
Fair Value | Deposits other than certificates of deposits |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Deposits | 3,521,493 | 3,550,762
Fair Value | Certificates of deposits |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Deposits | $ 1,945,367 | 1,597,939
Fair Value | Significant Unobservable Inputs (Level 3) |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Borrowings |  | 1,703,924
Interest payable on deposits |  | 2,265
Interest payable on borrowings |  | $ 7,784

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