Goodwill and Intangible Assets - Change in Goodwill (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2017 USD ($)
Goodwill [Roll Forward]
Beginning balance	$ 59,219
Foreign currency translation	373
Ending balance	59,592
Distribution [Member]
Goodwill [Roll Forward]
Beginning balance	505
Foreign currency translation	0
Ending balance	505
Material Handling [Member]
Goodwill [Roll Forward]
Beginning balance	58,714
Foreign currency translation	373
Ending balance	$ 59,087