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Summary of Significant Accounting Policies - Additional Information (Details) |  | 3 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Sep. 19, 2023 USD ($) $ / shares shares | Sep. 30, 2024 USD ($) Location $ / shares shares | Sep. 30, 2023 USD ($) | Jun. 30, 2024 USD ($) $ / shares shares | Jul. 01, 2023 USD ($) | Jun. 30, 2023 USD ($)
Summary of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Conversion shares sold | shares | 9,055,172 |  |  |  |  |
Common stock per share | $ / shares | $ 10 | $ 0.01 |  | $ 0.01 |  |
Cash |  |  | $ 91,586,000 |  |  |
Common stock outstanding | shares | 9,441,642 | 9,441,642 |  | 9,507,930 |  |
Number of full service branch locations | Location |  | 14 |  |  |  |
Number of operating leases acquired | Location |  | 10 |  |  |  |
Allowance for credit losses |  | $ 5,075,000 | $ 5,325,000 | $ 5,229,000 |  | $ 1,116,000
Retained earnings |  | $ 117,572,000 |  | $ 116,205,000 | $ 127,065,000 |
ASU 2016-02 |  |  |  |  |  |
Summary of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Change in accounting principle, accounting standards update, adopted [true false] |  | true |  |  |  |
Change in accounting principle, accounting standards update, adoption date |  | Sep. 30, 2022 |  |  |  |
Change in accounting principle, accounting standards update, immaterial effect [true false] |  | true |  |  |  |
ASU 2016-13 |  |  |  |  |  |
Summary of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Allowance for credit losses |  |  |  |  | 47,000 | $ 47,000
Deferred tax assets |  |  |  |  | 13,000 |
Retained earnings |  |  |  |  | $ 34,000 |
Somerset Regal Charitable Foundation Inc |  |  |  |  |  |
Summary of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Common stock issued | shares | 452,758 |  |  |  |  |
Cash | $ 905,517 |  |  |  |  |
Regal Bancorp Inc |  |  |  |  |  |
Summary of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Right to exchange their shares price | $ / shares | $ 23 |  |  |  |  |
Somerset Savings Bank Employee Stock Ownership Plan |  |  |  |  |  |
Summary of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Conversion shares sold | shares | 760,634 |  |  |  |  |

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