Pension and Postretirement Benefits (Change in Benefit Obligation) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Postretirement Medical Benefits
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Balance — January 1	$ 11,761	$ 12,417
Interest cost	462	678	$ 761
Employee contributions	274	303
Medicare subsidiaries receivable	(136)	55
Actuarial loss (gain)	(3,180)	(239)
Benefits paid	(1,285)	(1,453)
Balance — December 31	7,896	11,761	12,417
United States | Pension Plan
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Balance — January 1	415,236	417,648
Service cost	795	23,935	21,341
Interest cost	21,867	20,759	20,480
Plan amendments and settlements	(24,551)	0
Actuarial loss (gain)	5,451	(6,588)
Benefits paid	(12,873)	(40,518)
Balance — December 31	405,925	415,236	417,648
Accumulated benefit obligations	405,925	415,236
Foreign Plan | Pension Plan
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Balance — January 1	285,498	297,600
Service cost	6,303	6,381	4,611
Interest cost	13,440	12,401	11,897
Employee contributions	95	80
Increase (decease) from settlement	16,881	(13,051)
Actuarial loss (gain)	(3,887)	(13,012)
Benefits paid	(15,939)	(17,393)
Currency translation impact	25,793	(13,610)
Balance — December 31	294,422	285,498	$ 297,600
Accumulated benefit obligations	$ 270,804	$ 264,367