Restructuring (Schedule of Restructuring Reserve by Type of Cost) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Restructuring Reserve [Roll Forward]
Balance at December 31, 2016	$ 12,311
Charges (Credits)	2,704	$ (35)
Cash payments	(12,460)
Restructuring Reserve, Accrual Adjustment	17
Currency translation	1
Balance at March 31, 2017	2,573
Employee Severance [Member]
Restructuring Reserve [Roll Forward]
Balance at December 31, 2016	12,106
Charges (Credits)	2,718
Cash payments	(12,349)
Restructuring Reserve, Accrual Adjustment	0
Currency translation	0
Balance at March 31, 2017	2,475
Other Restructuring [Member]
Restructuring Reserve [Roll Forward]
Balance at December 31, 2016	205
Charges (Credits)	(14)
Cash payments	(111)
Restructuring Reserve, Accrual Adjustment	17
Currency translation	1
Balance at March 31, 2017	$ 98