Pensions and Other Postretirement Benefit Plans (Schedule of Net Periodic Benefit Plan Cost) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Pension plans
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	$ 1,371	$ 2,192	$ 2,279
Interest cost	4,917	5,467	6,172
Expected return on assets	(5,979)	(6,564)	(6,853)
Amortization of prior service cost/(credit)	(8)	13	14
Amortization of net actuarial loss	1,377	2,365	2,412
Settlement	49,128	0	148
Curtailment (gain)/loss	0	0	263
Net periodic benefit cost	$ 50,806	$ 3,473	$ 4,435
Pension plans | United States
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Discount rate	2.63%	2.65%	3.40%
Expected return on plan assets	3.07%	2.74%	3.54%
Rate of compensation increase	0.00%	0.00%	0.00%
Pension plans | Foreign Plan
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Discount rate	2.41%	1.91%	2.31%
Expected return on plan assets	3.31%	2.89%	3.45%
Rate of compensation increase	2.70%	2.71%	2.81%
Pension plans | Switzerland
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Cash balance interest crediting rate	0.25%	0.05%	0.25%
Other postretirement benefits
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	$ 114	$ 132	$ 200
Interest cost	1,221	1,103	1,712
Expected return on assets	0	0	0
Amortization of prior service cost/(credit)	(4,488)	(4,488)	(4,488)
Amortization of net actuarial loss	1,883	2,260	2,592
Settlement	0	0	0
Curtailment (gain)/loss	0	0	0
Net periodic benefit cost	$ (1,270)	$ (993)	$ 16
Other postretirement benefits | United States
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Discount rate	2.83%	2.38%	3.27%
Expected return on plan assets	0.00%	0.00%	0.00%
Rate of compensation increase	0.00%	0.00%	0.00%
Other postretirement benefits | Foreign Plan
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Discount rate	3.05%	2.75%	3.05%
Expected return on plan assets	0.00%	0.00%	0.00%
Rate of compensation increase	2.75%	2.75%	3.00%
Other postretirement benefits | Switzerland
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Cash balance interest crediting rate	0.00%	0.00%	0.00%