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Fair Value of Financial Instruments - Schedule of Carrying Amounts and Fair Values of Financial Instruments (Detail) - USD ($) $ in Thousands | Dec. 31, 2022 | Jun. 30, 2022
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Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Fair Value | $ 1,286,354 | $ 1,344,093
Investment securities held to maturity (fair value of $138,393 and $108,118, respectively) | 153,786 | 118,291
Fair Value | 138,393 | 108,118
Loans held-for-sale | 12,940 | 28,874
Net loans receivable | 5,935,256 | 5,370,787
Accrued interest receivable | 27,368 | 20,466
Net Amounts Presented | 63,617 | 41,223
Interest rate contracts | 2,500 |
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 | 75,660 | 101,615
Fair Value | 0 | 0
Fair Value | 0 | 0
Loans held-for-sale | 0 | 0
Net loans receivable | 0 | 0
FHLB Stock | 0 | 0
Accrued interest receivable | 10 | 2
Net Amounts Presented | 0 | 0
Borrowings | 0 | 0
Interest payable on deposits | 1,506 | 147
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 | 3,868,949 | 3,972,694
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
Fair Value | 1,286,354 | 1,344,093
Fair Value | 138,393 | 108,118
Loans held-for-sale | 12,975 | 28,831
Net loans receivable | 0 | 0
FHLB Stock | 0 | 0
Accrued interest receivable | 8,369 | 5,210
Net Amounts Presented | 63,617 | 41,223
Borrowings | 0 | 0
Interest payable on deposits | 0 | 0
Interest payable on borrowings | 0 | 0
Interest rate contracts | 2,500 |
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
Fair Value | 0 | 0
Fair Value | 0 | 0
Loans held-for-sale | 0 | 0
Net loans receivable | 5,540,440 | 5,215,079
FHLB Stock | 0 | 0
Accrued interest receivable | 18,989 | 15,254
Net Amounts Presented | 0 | 0
Borrowings | 1,379,640 |
Interest payable on deposits | 3,431 |
Interest payable on borrowings | 3,664 |
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 | 2,060,954 | 1,866,341
Carrying Amount [Member] |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Cash and cash equivalents | 75,660 | 101,615
Fair Value | 1,286,354 | 1,344,093
Investment securities held to maturity (fair value of $138,393 and $108,118, respectively) | 153,786 | 118,291
Loans held-for-sale | 12,940 | 28,874
Net loans receivable | 5,935,256 | 5,370,787
FHLB Stock | 69,022 | 47,144
Accrued interest receivable | 27,368 | 20,466
Net Amounts Presented | 63,617 | 41,223
Borrowings | 1,383,573 | 901,337
Interest payable on deposits | 4,937 | 722
Interest payable on borrowings | 3,664 | 1,611
Interest rate contracts | 2,500 |
Carrying Amount [Member] | Deposits other than certificates of deposits |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Deposits | 3,868,949 | 3,972,694
Carrying Amount [Member] | Certificates of deposits |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Deposits | 2,102,422 | 1,889,562
Fair Value [Member] |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Cash and cash equivalents | 75,660 | 101,615
Fair Value | 1,286,354 | 1,344,093
Fair Value | 138,393 | 108,118
Loans held-for-sale | 12,975 | 28,831
Net loans receivable | 5,540,440 | 5,215,079
FHLB Stock | 0 | 0
Accrued interest receivable | 27,368 | 20,466
Net Amounts Presented | 63,617 | 41,223
Borrowings | 1,379,640 | 900,505
Interest payable on deposits | 4,937 | 722
Interest payable on borrowings | 3,664 | 1,611
Interest rate contracts | 2,500 |
Fair Value [Member] | Deposits other than certificates of deposits |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Deposits | 3,868,949 | 3,972,694
Fair Value [Member] | Certificates of deposits |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Deposits | $ 2,060,954 | 1,866,341
Fair Value [Member] | Significant Unobservable Inputs (Level 3) |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Borrowings |  | 900,505
Interest payable on deposits |  | 575
Interest payable on borrowings |  | $ 1,611

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