Restructuring - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Restructuring Cost And Reserve [Line Items]
Restructuring charges	$ 119	$ 7,553	$ 0
Cost of Sales [Member]
Restructuring Cost And Reserve [Line Items]
Restructuring charges	119	7,389	0
Other restructuring associated costs incurred		100
General and Administrative Expense
Restructuring Cost And Reserve [Line Items]
Other restructuring associated costs incurred		1,000
Facility Closing
Restructuring Cost And Reserve [Line Items]
Recognized gains on asset dispositions	200	3,900
Material Handling [Member]
Restructuring Cost And Reserve [Line Items]
Restructuring charges	119	7,553	0
Material Handling [Member] | Cost of Sales [Member]
Restructuring Cost And Reserve [Line Items]
Restructuring charges	119	7,389	$ 0
Material Handling [Member] | Facility Closing
Restructuring Cost And Reserve [Line Items]
Total restructuring costs incurred	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
Restructuring charges in accelerated depreciation charges on property, plant and equipment	2,000
Restructuring charges	100	7,600
Other restructuring associated costs incurred	$ 0	$ 1,100