Pension, Postretirement, and Other Benefit Plans (Schedule of Net Periodic Benefit Plan Cost) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Pension plans
Components of net periodic benefit cost:
Service cost	$ 1,478	$ 1,371	$ 2,192
Interest cost	5,151	4,917	5,467
Expected return on assets	(4,347)	(5,979)	(6,564)
Amortization of prior service cost/(credit)	(32)	(8)	13
Amortization of net actuarial loss	555	1,377	2,365
Settlement	0	49,128	0
Curtailment (gain)/loss	0	0	0
Net periodic benefit cost	$ 2,805	$ 50,806	$ 3,473
Pension plans | United States
Weighted average assumptions used to determine net cost:
Discount rate	5.49%	2.63%	2.65%
Expected return on plan assets		3.07%	2.74%
Pension plans | Foreign Plan
Weighted average assumptions used to determine net cost:
Discount rate	5.15%	2.41%	1.91%
Expected return on plan assets	5.21%	3.31%	2.89%
Rate of compensation increase	3.08%	2.70%	2.71%
Pension plans | Switzerland
Weighted average assumptions used to determine net cost:
Cash balance interest crediting rate	2.15%	0.25%	0.05%
Other postretirement benefits
Components of net periodic benefit cost:
Service cost	$ 60	$ 114	$ 132
Interest cost	1,874	1,221	1,103
Expected return on assets	0	0	0
Amortization of prior service cost/(credit)	(4,090)	(4,488)	(4,488)
Amortization of net actuarial loss	828	1,883	2,260
Settlement	0	0	0
Curtailment (gain)/loss	0	0	0
Net periodic benefit cost	$ (1,328)	$ (1,270)	$ (993)
Other postretirement benefits | United States
Weighted average assumptions used to determine net cost:
Discount rate	5.55%	2.83%	2.38%
Other postretirement benefits | Foreign Plan
Weighted average assumptions used to determine net cost:
Discount rate	5.20%	3.05%	2.75%
Rate of compensation increase	2.75%	2.75%	2.75%
Other postretirement benefits | Switzerland
Weighted average assumptions used to determine net cost:
Cash balance interest crediting rate	0.00%	0.00%	0.00%