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Investment Securities - Additional Information (Details) - USD ($) | 3 Months Ended |
--- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Jun. 30, 2024
Schedule of Held-to-Maturity Securities [Line Items] |  |  |
Sale of security held to maturity | $ 0 | $ 0 |
Securities available-for-sale | 0 |  | $ 0
Sale of securities available-for-sale | 0 | 0 |
Available-for-sale, Realized gain |  | 17,000 |
Purchase of available-for-sale securities | 0 | 0 |
Regal Bancorp Inc |  |  |
Schedule of Held-to-Maturity Securities [Line Items] |  |  |
Sale of securities available-for-sale |  | 19,200,000 |
Available-for-sale securities acquired |  | $ 20,900,000 |
Secure Public Funds |  |  |
Schedule of Held-to-Maturity Securities [Line Items] |  |  |
Mortgage-backed security | 1,700,000 |  | $ 1,800,000
Mortgage-backed Securities of U.S. Government and Government-sponsored Agencies |  |  |
Schedule of Held-to-Maturity Securities [Line Items] |  |  |
Expected credit loss | $ 0 |  |

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