Pensions and Other Postretirement Benefits (Accrued Pension and Other Postretirement Costs) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Defined Benefit Plan Disclosure [Line Items]
Liability, defined benefit plan, noncurrent	$ (12,253)	$ (16,687)
Pension Plans | United States
Defined Benefit Plan Disclosure [Line Items]
Liability, defined benefit plan, current	(107)	(105)
Liability, defined benefit plan, noncurrent	(2,519)	(2,642)
Accumulated other comprehensive (gain)/loss	693	823
Amounts recognized in consolidated balance sheets	(1,933)	(1,924)
Pension Plans | Foreign Plan
Defined Benefit Plan Disclosure [Line Items]
Liability, defined benefit plan, current	(375)	(240)
Liability, defined benefit plan, noncurrent	(6,065)	(9,691)
Accumulated other comprehensive (gain)/loss	6,764	9,068
Amounts recognized in consolidated balance sheets	324	(863)
OPEB Plans
Defined Benefit Plan Disclosure [Line Items]
Liability, defined benefit plan, current	(227)	(266)
Liability, defined benefit plan, noncurrent	(2,658)	(3,311)
Accumulated other comprehensive (gain)/loss	(28)	583
Amounts recognized in consolidated balance sheets	$ (2,913)	$ (2,994)