v3.25.2
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%