v3.26.1
Pension And Other Postretirement Benefit Plans (Components Of Company's Net Periodic Benefit Cost) (Details) - USD ($)
$ in Thousands
 3 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Pension Benefits [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Service cost $ 1,403 $ 1,252
Interest cost 2,350 2,267
Expected return on plan assets (2,871) (3,027)
Net amortization and deferral 323 83
Net periodic benefit cost 1,205 575
Other Postretirement Benefits [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Service cost 16 17
Interest cost 266 262
Expected return on plan assets (7) (11)
Net amortization and deferral (152) (160)
Net periodic benefit cost $ 123 $ 108