Restructuring Activities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Restructuring Reserve [Roll Forward]
Accrued Restructuring, Beginning Balance	$ 670	$ 6,303	$ 0
Restructuring and related activities	0	(439)	6,790
Cash Payments	(675)	(5,252)	(490)
Currency Translation Adjustments	(5)	(58)	(3)
Accrued Restructuring, Ending Balance	0	670	6,303
North America [Member]
Restructuring Reserve [Roll Forward]
Accrued Restructuring, Beginning Balance	196	1,867	0
Restructuring and related activities	(126)	0	2,025
Cash Payments	(70)	(1,671)	(158)
Currency Translation Adjustments	0	0	0
Accrued Restructuring, Ending Balance	0	196	1,867
EMEA [Member]
Restructuring Reserve [Roll Forward]
Accrued Restructuring, Beginning Balance	474	4,265	0
Restructuring and related activities	126	(439)	4,390
Cash Payments	(605)	(3,404)	(130)
Currency Translation Adjustments	(5)	(52)	(5)
Accrued Restructuring, Ending Balance	0	474	4,265
Asia Pacific [Member]
Restructuring Reserve [Roll Forward]
Accrued Restructuring, Beginning Balance	0	135	0
Restructuring and related activities	0	0	338
Cash Payments	0	(138)	(202)
Currency Translation Adjustments	0	(3)	1
Accrued Restructuring, Ending Balance	0	0	135
South America [Member]
Restructuring Reserve [Roll Forward]
Accrued Restructuring, Beginning Balance	0	36	0
Restructuring and related activities	0	0	37
Cash Payments	0	(39)	0
Currency Translation Adjustments	0	(3)	1
Accrued Restructuring, Ending Balance	$ 0	$ 0	$ 36