Restructuring Costs (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Restructuring Cost and Reserve [Line Items]
Restructuring costs	$ 76	$ 918	$ 2,293
Employee Severance
Restructuring Cost and Reserve [Line Items]
Restructuring costs			1,200
Facility Closing
Restructuring Cost and Reserve [Line Items]
Restructuring costs			$ 1,100