Restructuring (Schedule of Restructuring Liability) (Details) - USD ($) $ in Thousands	12 Months Ended		48 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2018
Restructuring Reserve [Roll Forward]
Restructuring charges accrued	$ 10,700	$ 11,800	$ 14,800
Termination Costs [Member]
Restructuring Reserve [Roll Forward]
Beginning balance	3,326	5,559
Restructuring charges accrued	13,420	7,949
Payments	(10,696)	(10,351)
Currency translation/other	(480)	169
Ending balance	$ 5,570	$ 3,326	$ 5,570