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Employee Benefits - Additional Information (Detail) - USD ($) | 12 Months Ended |  |
--- | --- | --- | ---
Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2027 | Jun. 30, 2026
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Expected contribution by the association in the year 2021 | $ 113,000 |  |  |
Estimated net loss | (29,000) |  |  |
Prior service cost | 0 |  |  |
Transition obligation | $ 0 |  |  |
Discount rates | 5.42% | 5.31% |  |
Annual rate of health care cost, increase | 8.00% |  | 7.00% | 7.00%
Matching contribution contributed by the association under the plan | 25.00% |  |  |
Percentage of employee's compensation | 5.00% |  |  |
Employer contributions | $ 86,000 | $ 96,000 |  |
Employer contributions | $ 2,600,000 | $ 2,400,000 |  |
Normal retirement age of directors | 72 years |  |  |
Benefit cost discount rate | 5.31% | 4.76% |  |
Deferred Profit Sharing [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Employer contributions | $ 374,000 | $ 402,000 |  |
Deferred Compensation Agreements [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Expected annual rate of health care cost, decrease | 5.00% |  |  |
Employer contributions | $ 294,000 | $ 271,000 |  |
Minimum [Member] | Deferred Profit Sharing [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Employer Profit Sharing contribution under the Plan | 4.00% |  |  |

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