Retirement Plans and Postretirement Medical Benefits (Other Changes in Plan Assets and Benefit Obligations) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Nonpension postretirement benefit plans
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss	$ 2,630	$ (5,603)
Amortization of net actuarial loss	2,456	1,451
Total recognized in other comprehensive loss	5,086	(4,152)
United States | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss	33,644	23,443
Amortization of net actuarial loss	(20,156)	(19,190)
Amortization of prior service credit (cost)	20	20
Settlements	0	(88,051)
Total recognized in other comprehensive loss	13,508	(83,778)
Foreign | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss	2,577	29,581
Amortization of net actuarial loss	(9,120)	(7,737)
Amortization of prior service credit (cost)	(307)	(298)
Settlements	(197)	(3,373)
Total recognized in other comprehensive loss	$ (7,047)	$ 18,173