Goodwill Assets (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2018 USD ($)
Goodwill [Roll Forward]
Goodwill, Beginning Balance	$ 86,034
Goodwill, Translation Adjustments	674
Goodwill, Ending Balance	86,708
North America [Member]
Goodwill [Roll Forward]
Goodwill, Beginning Balance	47,571
Goodwill, Translation Adjustments	16
Goodwill, Ending Balance	47,587
EMEA [Member]
Goodwill [Roll Forward]
Goodwill, Beginning Balance	20,504
Goodwill, Translation Adjustments	387
Goodwill, Ending Balance	20,891
Asia Pacific [Member]
Goodwill [Roll Forward]
Goodwill, Beginning Balance	15,456
Goodwill, Translation Adjustments	272
Goodwill, Ending Balance	15,728
South America [Member]
Goodwill [Roll Forward]
Goodwill, Beginning Balance	2,503
Goodwill, Translation Adjustments	(1)
Goodwill, Ending Balance	$ 2,502