v3.26.1
Pension and Other Postretirement Benefits - Hierarchy of Fair Value of the Benefit Plan Assets (Details) - USD ($)
$ in Thousands
Jun. 30, 2026
Jun. 30, 2025
Defined Benefit Plan Disclosure [Line Items]    
Total investments $ 614,576 $ 629,588
Level 1    
Defined Benefit Plan Disclosure [Line Items]    
Total investments 16 11
Level 2    
Defined Benefit Plan Disclosure [Line Items]    
Total investments 539,760 542,896
Level 3    
Defined Benefit Plan Disclosure [Line Items]    
Total investments 0 0
NAV    
Defined Benefit Plan Disclosure [Line Items]    
Total investments 74,800 86,681
Blend funds    
Defined Benefit Plan Disclosure [Line Items]    
Total investments 41,582 50,038
Blend funds | Level 1    
Defined Benefit Plan Disclosure [Line Items]    
Total investments 0 0
Blend funds | Level 2    
Defined Benefit Plan Disclosure [Line Items]    
Total investments 0 0
Blend funds | Level 3    
Defined Benefit Plan Disclosure [Line Items]    
Total investments 0 0
Blend funds | NAV    
Defined Benefit Plan Disclosure [Line Items]    
Total investments 41,582 50,038
Mutual funds    
Defined Benefit Plan Disclosure [Line Items]    
Total investments 33,218 36,643
Mutual funds | Level 1    
Defined Benefit Plan Disclosure [Line Items]    
Total investments 0 0
Mutual funds | Level 2    
Defined Benefit Plan Disclosure [Line Items]    
Total investments 0 0
Mutual funds | Level 3    
Defined Benefit Plan Disclosure [Line Items]    
Total investments 0 0
Mutual funds | NAV    
Defined Benefit Plan Disclosure [Line Items]    
Total investments 33,218 36,643
Corporate fixed income securities    
Defined Benefit Plan Disclosure [Line Items]    
Total investments 295,961 321,975
Corporate fixed income securities | Level 1    
Defined Benefit Plan Disclosure [Line Items]    
Total investments 0 0
Corporate fixed income securities | Level 2    
Defined Benefit Plan Disclosure [Line Items]    
Total investments 295,961 321,975
Corporate fixed income securities | Level 3    
Defined Benefit Plan Disclosure [Line Items]    
Total investments 0 0
Corporate fixed income securities | NAV    
Defined Benefit Plan Disclosure [Line Items]    
Total investments 0 0
Common stock    
Defined Benefit Plan Disclosure [Line Items]    
Total investments 16 11
Common stock | Level 1    
Defined Benefit Plan Disclosure [Line Items]    
Total investments 16 11
Common stock | Level 2    
Defined Benefit Plan Disclosure [Line Items]    
Total investments 0 0
Common stock | Level 3    
Defined Benefit Plan Disclosure [Line Items]    
Total investments 0 0
Common stock | NAV    
Defined Benefit Plan Disclosure [Line Items]    
Total investments 0 0
U.S. government securities    
Defined Benefit Plan Disclosure [Line Items]    
Total investments 119,476 103,056
U.S. government securities | Level 1    
Defined Benefit Plan Disclosure [Line Items]    
Total investments 0 0
U.S. government securities | Level 2    
Defined Benefit Plan Disclosure [Line Items]    
Total investments 119,476 103,056
U.S. government securities | Level 3    
Defined Benefit Plan Disclosure [Line Items]    
Total investments 0 0
U.S. government securities | NAV    
Defined Benefit Plan Disclosure [Line Items]    
Total investments 0 0
Foreign government securities    
Defined Benefit Plan Disclosure [Line Items]    
Total investments 677 1,353
Foreign government securities | Level 1    
Defined Benefit Plan Disclosure [Line Items]    
Total investments 0 0
Foreign government securities | Level 2    
Defined Benefit Plan Disclosure [Line Items]    
Total investments 677 1,353
Foreign government securities | Level 3    
Defined Benefit Plan Disclosure [Line Items]    
Total investments 0 0
Foreign government securities | NAV    
Defined Benefit Plan Disclosure [Line Items]    
Total investments 0 0
Other fixed income securities    
Defined Benefit Plan Disclosure [Line Items]    
Total investments 39,023 31,475
Other fixed income securities | Level 1    
Defined Benefit Plan Disclosure [Line Items]    
Total investments 0 0
Other fixed income securities | Level 2    
Defined Benefit Plan Disclosure [Line Items]    
Total investments 39,023 31,475
Other fixed income securities | Level 3    
Defined Benefit Plan Disclosure [Line Items]    
Total investments 0 0
Other fixed income securities | NAV    
Defined Benefit Plan Disclosure [Line Items]    
Total investments 0 0
Other    
Defined Benefit Plan Disclosure [Line Items]    
Total investments 84,623 85,037
Other | Level 1    
Defined Benefit Plan Disclosure [Line Items]    
Total investments 0 0
Other | Level 2    
Defined Benefit Plan Disclosure [Line Items]    
Total investments 84,623 85,037
Other | Level 3    
Defined Benefit Plan Disclosure [Line Items]    
Total investments 0 0
Other | NAV    
Defined Benefit Plan Disclosure [Line Items]    
Total investments $ 0 $ 0