Goodwill and Intangible Assets - Change in Goodwill (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Goodwill [Roll Forward]
Beginning balance	$ 59,219	$ 64,035
Foreign currency translation	87	1,246
Impairment charges		(5,676)
Ending balance	59,306	59,605
Distribution [Member]
Goodwill [Roll Forward]
Beginning balance	505	505
Foreign currency translation	0	0
Impairment charges		0
Ending balance	505	505
Material Handling [Member]
Goodwill [Roll Forward]
Beginning balance	58,714	63,530
Foreign currency translation	87	1,246
Impairment charges		(5,676)
Ending balance	$ 58,801	$ 59,100