Restructuring - Additional Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Restructuring Cost And Reserve [Line Items]
Restructuring charges	$ 865,000	$ 119,000	$ 7,553,000
General and Administrative Expense [Member]
Restructuring Cost And Reserve [Line Items]
Other restructuring associated costs incurred			1,000,000
Cost of Sales [Member]
Restructuring Cost And Reserve [Line Items]
Restructuring charges	0	119,000	7,389,000
Other restructuring associated costs incurred			100,000
Ameri-Kart [Member]
Restructuring Cost And Reserve [Line Items]
Expected restructuring charges	1,100,000
Restructuring charges	0
Ameri-Kart [Member] | General and Administrative Expense [Member]
Restructuring Cost And Reserve [Line Items]
Other restructuring associated costs incurred	200,000
Distribution Transformation Plan [Member]
Restructuring Cost And Reserve [Line Items]
Expected restructuring charges	900,000
Distribution Transformation Plan [Member] | General and Administrative Expense [Member]
Restructuring Cost And Reserve [Line Items]
Other restructuring associated costs incurred	200,000
Material Handling [Member]
Restructuring Cost And Reserve [Line Items]
Restructuring charges	0	119,000	7,553,000
Other restructuring associated costs incurred			1,100,000
Material Handling [Member] | Cost of Sales [Member]
Restructuring Cost And Reserve [Line Items]
Restructuring charges	0	119,000	7,389,000
Material Handling [Member] | Equipment Relocation and Facility Shut Down Costs [Member]
Restructuring Cost And Reserve [Line Items]
Restructuring charges	$ 0	100,000	7,600,000
Total restructuring costs incurred			7,700,000
Restructuring charges in employee severance and other employee-related costs			3,100,000
Restructuring charges in equipment relocation and facility shut down costs			2,600,000
Restructuring charges in accelerated depreciation			2,000,000
Recognized gains on asset dispositions		$ 200,000	$ 3,900,000