Restructuring Costs (Restructuring Activities) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Restructuring Charges [Abstract]
Restructuring reserve, beginning balance	$ 63
Restructuring costs	76	$ 918	$ 2,293
Restructuring reserve, ending balance	0	63
Employee Severance
Restructuring Charges [Abstract]
Restructuring costs			1,200
Cost Reduction Program | Employee Severance
Restructuring Charges [Abstract]
Restructuring reserve, beginning balance	63	604
Restructuring costs	76	918
Cash payments	(138)	(1,458)
Foreign currency translation	(1)	(1)
Restructuring reserve, ending balance	$ 0	$ 63	$ 604