Restructuring - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Restructuring Cost And Reserve [Line Items]
Restructuring charges	$ 119
Facility Closing [Member] | Manufacturing Plant, in Bluffton, Indiana [Member]
Restructuring Cost And Reserve [Line Items]
Gains on other asset dispositions		$ 700
Material Handling [Member] | Facility Closing [Member]
Restructuring Cost And Reserve [Line Items]
Expected restructuring charges in 2017	7,700
Restructuring charges in employee severance and other employee-related costs	3,100
Restructuring charges in equipment relocation and facility shut down costs	2,600
Expected restructuring charges in accelerated depreciation charges on property, plant and equipment	2,000
Restructuring charges	100	1,000
Other restructuring associated costs incurred	$ 0	$ 400