v3.26.1
Pensions and Other Postretirement Benefit Plans (Schedule of Net Benefit Costs) (Details) - USD ($)
$ in Thousands
 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Pension plans    
Defined Benefit Plan Disclosure [Line Items]    
Service cost $ 475 $ 552
Interest cost 3,049 2,947
Expected return on assets (1,407) (2,250)
Curtailment cost/(income) 0 (3,770)
Settlement cost/(income) 0 2,170
Amortization of prior service cost/(income) (17) (13)
Amortization of net actuarial loss 726 609
Net periodic benefit cost 2,826 245
Other postretirement benefits    
Defined Benefit Plan Disclosure [Line Items]    
Service cost 19 20
Interest cost 663 707
Expected return on assets 0 0
Curtailment cost/(income) 0 0
Settlement cost/(income) 0 0
Amortization of prior service cost/(income) (61) (61)
Amortization of net actuarial loss 8 (16)
Net periodic benefit cost $ 629 $ 650