Goodwill and Intangible Assets - Change in Goodwill (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2018 USD ($)
Goodwill [Roll Forward]
Beginning balance	$ 59,971
Foreign currency translation	(302)
Ending balance	59,669
Distribution [Member]
Goodwill [Roll Forward]
Beginning balance	505
Foreign currency translation	0
Ending balance	505
Material Handling [Member]
Goodwill [Roll Forward]
Beginning balance	59,466
Foreign currency translation	(302)
Ending balance	$ 59,164