Pensions and Other Postretirement Benefit Plans (Schedule of Net Benefit Costs) (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024
Pension plans
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 836	$ 1,473
Interest cost	4,505	4,545
Expected return on assets	(3,427)	(4,030)
Curtailment cost/(income)	(3,770)	0
Settlement cost/(income)	2,170	0
Amortization of prior service cost/(income)	(20)	(20)
Amortization of net actuarial loss	932	556
Net periodic benefit cost/(credit)	1,226	2,524
Other postretirement benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	30	35
Interest cost	1,060	1,063
Expected return on assets	0	0
Curtailment cost/(income)	0	0
Settlement cost/(income)	0	0
Amortization of prior service cost/(income)	(92)	(93)
Amortization of net actuarial loss	(24)	(26)
Net periodic benefit cost/(credit)	$ 974	$ 979