Pension and Postretirement Benefits (Change in Benefit Obligation) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Postretirement Medical Benefits
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Balance — January 1	$ 12,417	$ 13,353
Interest cost	678	761	$ 464
Employee contributions	303	379
Medicare subsidies receivable	55	60
Actuarial loss (gain)	(239)	(49)
Benefits paid	(1,453)	(2,087)
Balance — December 31	11,761	12,417	13,353
United States | Pension Plan
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Balance — January 1	417,648	382,959
Service cost	23,935	21,341	24,680
Interest cost	20,759	20,480	13,157
Plan amendments and settlements	0	(3,103)
Actuarial loss (gain)	(6,588)	31,912
Benefits paid	(40,518)	(35,941)
Balance — December 31	415,236	417,648	382,959
Accumulated benefit obligations	415,236	417,648
Settlements	0	395
Foreign Plan | Pension Plan
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Balance — January 1	297,600	268,364
Service cost	6,381	4,611	5,984
Interest cost	12,401	11,897	6,506
Employee contributions	80	80
Settlements and other(3)	13,051	(982)
Actuarial loss (gain)	(13,012)	17,082
Benefits paid	(17,393)	(15,181)
Currency translation impact	(13,610)	11,729
Balance — December 31	285,498	297,600	$ 268,364
Accumulated benefit obligations	264,367	$ 279,760
Settlements	600
Foreign Plan | Pension Plan | Middle East Pension Plan
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Settlements and other(3)	$ 13,600