v3.26.1
Pension Plans and Other Postretirement Benefit Plans - Net Funded Status (Details) - USD ($)
$ in Thousands
 12 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2024
Change in plan assets:      
Fair value of plan assets at beginning of period $ 117,009    
Administrative expenses paid 0 $ (1) $ (7)
Fair value of plan assets at end of period 119,785 117,009  
Pension Plans      
Change in benefit obligation:      
Benefit obligation at beginning of period 128,608 126,605  
Service cost 57 55 71
Interest cost 6,032 6,425 6,673
Actuarial loss (gain) 1,148 2,412  
Benefits paid (8,010) (6,879)  
Plan settlements paid 0 (10)  
Benefit obligation at end of period 127,835 128,608 126,605
Change in plan assets:      
Fair value of plan assets at beginning of period 117,010 110,308  
Actual return on plan assets 8,934 8,854  
Employer contributions 3,380 5,965  
Benefits paid (7,912) (6,781)  
Administrative expenses paid (1,628) (1,336)  
Fair value of plan assets at end of period 119,784 117,010 110,308
Funded status at end of period (8,051) (11,598)  
Postretirement Plan      
Change in benefit obligation:      
Benefit obligation at beginning of period 1,988 2,262  
Service cost 17 17 21
Interest cost 80 105 120
Actuarial loss (gain) 501 (48)  
Benefits paid (979) (348)  
Plan settlements paid 0 0  
Benefit obligation at end of period 1,607 1,988 2,262
Change in plan assets:      
Fair value of plan assets at beginning of period 0 0  
Actual return on plan assets 0 0  
Employer contributions 0 0  
Benefits paid 0 0  
Administrative expenses paid 0 0  
Fair value of plan assets at end of period 0 0 $ 0
Funded status at end of period $ (1,607) $ (1,988)