Restructuring (Schedule of Restructuring Liability) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Restructuring Reserve [Roll Forward]
Restructuring charges accrued	$ 900	$ 10,700	$ 12,700
Termination Costs [Member]
Restructuring Reserve [Roll Forward]
Beginning balance	5,570	3,326
Restructuring charges accrued	1,269	13,420
Payments	(5,084)	(10,696)
Currency translation/other	287	(480)
Ending balance	$ 2,042	$ 5,570	$ 3,326