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Employee Benefits - Additional Information (Detail) - USD ($) | 12 Months Ended |  |
--- | --- | --- | ---
Jun. 30, 2022 | Jun. 30, 2021 | Jun. 30, 2024 | Jun. 30, 2023
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Expected contribution by the association in the year 2021 | $ 146,000 |  |  |
Estimated net loss | (59,000) |  |  |
Prior service cost | 0 |  |  |
Transition obligation | $ 0 |  |  |
Discount rates | 4.02% | 2.65% |  |
Annual rate of health care cost, increase | 9.00% |  | 8.50% | 8.50%
Matching contribution contributed by the association under the plan | 25.00% |  |  |
Percentage of employee's compensation | 5.00% |  |  |
Employer contributions | $ 90,000 | $ 88,000 |  |
Employer contributions | $ 2,000,000 | $ 1,800,000 |  |
Normal retirement age of directors | 72 years |  |  |
Benefit cost discount rate | 2.65% | 2.32% |  |
Deferred Profit Sharing [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Employer contributions | $ 676,000 | $ 650,000 |  |
Minimum [Member] | Deferred Profit Sharing [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Employer Profit Sharing contribution under the Plan | 5.00% |  |  |
Deferred Compensation Agreements [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Expected annual rate of health care cost, decrease | (5.00%) |  |  |
Benefit cost discount rate | 6.00% |  |  |
Employer contributions | $ 278,000 | $ 251,000 |  |

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