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Benefit Plans - Schedule of Fair Value Measurements of ABRIP's Assets (Details) - Atlas Bank Retirement Income Plan ("ABRIP") - USD ($) $ in Thousands | Jun. 30, 2023 | Jun. 30, 2022 | Jun. 30, 2021
--- | --- | --- | ---
Defined Benefit Plan Disclosure [Line Items] |  |  |
Prudential Guaranteed Deposit Fund | $ 2,717 | $ 2,907 | $ 3,220
Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Prudential Guaranteed Deposit Fund | 0 | 0 |
Significant Other Observable Inputs (Level 2) |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Prudential Guaranteed Deposit Fund | 2,717 | 2,907 |
Significant Unobservable Inputs (Level 3) |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Prudential Guaranteed Deposit Fund | $ 0 | $ 0 |

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