Pension and Postretirement Benefits (Change in Benefit Obligation) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Postretirement Medical Benefits
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Balance — January 1	$ 17,021	$ 18,648
Interest cost	464	399	$ 596
Employee contributions	792	874
Medicare subsidies receivable	0	67
Actuarial loss (gain)	(1,747)	1,225
Benefits paid	(3,177)	(4,192)
Balance — December 31	13,353	17,021	18,648
United States | Pension Plan
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Balance — January 1	471,825	487,418
Service cost	24,680	25,162	25,893
Interest cost	13,157	11,952	15,100
Plan amendments and settlements	179	0
Actuarial loss (gain)	(87,791)	(11,208)
Benefits paid	(39,091)	(41,499)
Balance — December 31	382,959	471,825	487,418
Accumulated benefit obligations	382,488	471,024
Foreign Plan | Pension Plan
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Balance — January 1	420,809	469,998
Service cost	5,984	7,336	7,052
Interest cost	6,506	5,544	6,572
Employee contributions	71	74
Settlements and other	7,944	3,140
Actuarial loss (gain)	(108,546)	(24,493)
Benefits paid	(15,797)	(17,316)
Currency translation impact	(32,719)	(17,194)
Balance — December 31	268,364	420,809	$ 469,998
Accumulated benefit obligations	$ 253,428	$ 399,757