v3.26.1
Note M - Pension and Other Postretirement Benefit Plans - Net Funded Status of Pension and Postretirement Plans (Details) - USD ($)
$ in Thousands
 12 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Return on plan assets $ 0  
Net amount recognized (8,753) $ (11,461)
Pension Plan [Member]    
Benefit obligation, beginning of year 66,424 68,110
Service cost 352 352
Interest cost 3,132 3,404
Prior service cost 21 21
Actuarial loss (gain) 82 1,753
Contributions by plan participants 139 137
Benefits paid (7,977) (7,353)
Benefit obligation, end of year 62,173 66,424
Fair value of assets, Balance 56,860 62,660
Actual return on plan assets 3,737 2,616
Employer contribution 656 608
Contributions by plan participants 139 137
Benefits paid (7,977) (7,353)
Fair value of assets, Balance 53,415 56,860
Funded status (8,758) (9,564)
Other assets - noncurrent 40 15
Accrued liabilities - current (282) (380)
Accrued retirement benefits - noncurrent (8,516) (9,199)
Net amount recognized (8,758) (9,564)
Net transition obligation 0 26
Prior service benefit (180) (185)
Actuarial net loss (gain) 9,212 11,937
Net amount recognized 9,032 11,778
Other Postretirement Benefits Plan [Member]    
Benefit obligation, beginning of year 2,870 3,169
Service cost 5 7
Interest cost 139 165
Prior service cost 0 0
Actuarial loss (gain) (9) 33
Contributions by plan participants 159 155
Benefits paid (660) (659)
Benefit obligation, end of year 2,504 2,870
Fair value of assets, Balance 0 0
Actual return on plan assets 0 0
Employer contribution 501 504
Contributions by plan participants 159 155
Benefits paid (660) (659)
Fair value of assets, Balance 0 0
Funded status (2,504) (2,870)
Other assets - noncurrent 0 0
Accrued liabilities - current (591) (237)
Accrued retirement benefits - noncurrent (1,913) (2,633)
Net amount recognized (2,504) (2,870)
Net transition obligation 0 0
Prior service benefit 0 0
Actuarial net loss (gain) (279) (317)
Net amount recognized $ (279) $ (317)