Pensions and Other Postretirement Benefit Plans (Schedule of (Gains)/Losses Recognized in Other Comprehensive Income) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, before Tax [Abstract]
Settlements/curtailments	$ 0	$ (411)	$ (450)
Asset/liability loss/(gain)	2,259	(13,407)	1,796
Amortization of actuarial (loss)	(4,625)	(5,004)	(4,480)
Amortization of prior service cost/(credit)	4,475	4,474	4,420
Pension plans
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, before Tax [Abstract]
Settlements/curtailments	0	(411)	(450)
Asset/liability loss/(gain)	1,927	(8,053)	(2,794)
Amortization of actuarial (loss)	(2,365)	(2,412)	(2,253)
Amortization of prior service cost/(credit)	(13)	(14)	(68)
Other	0	(204)	0
Currency impact	(612)	670	316
Cost/(benefit) in Other comprehensive income	(1,063)	(10,424)	(5,249)
Other postretirement benefits
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, before Tax [Abstract]
Settlements/curtailments	0	0	0
Asset/liability loss/(gain)	(995)	(4,794)	4,685
Amortization of actuarial (loss)	(2,260)	(2,592)	(2,227)
Amortization of prior service cost/(credit)	4,488	4,488	4,488
Other	0	0	0
Currency impact	2	3	0
Cost/(benefit) in Other comprehensive income	$ 1,235	$ (2,895)	$ 6,946