Revenue Recognition - Schedule of Disaggregation of Revenue by Major Market (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Disaggregation Of Revenue [Line Items]
Net sales	$ 138,388	$ 135,219	$ 140,560	$ 152,568	$ 140,106	$ 135,113	$ 135,252	$ 136,572	$ 566,735	$ 547,043	$ 534,379
Operating Segments [Member] | Material Handling [Member]
Disaggregation Of Revenue [Line Items]
Net sales									417,199	391,313	363,956
Operating Segments [Member] | Distribution [Member]
Disaggregation Of Revenue [Line Items]
Net sales									149,636	156,428	170,660
Inter-company [Member]
Disaggregation Of Revenue [Line Items]
Net sales									(100)	$ (698)	$ (237)
Consumer [Member]
Disaggregation Of Revenue [Line Items]
Net sales									78,174
Consumer [Member] | Operating Segments [Member] | Material Handling [Member]
Disaggregation Of Revenue [Line Items]
Net sales									78,174
Vehicle [Member]
Disaggregation Of Revenue [Line Items]
Net sales									95,247
Vehicle [Member] | Operating Segments [Member] | Material Handling [Member]
Disaggregation Of Revenue [Line Items]
Net sales									95,247
Food and Beverage [Member]
Disaggregation Of Revenue [Line Items]
Net sales									101,610
Food and Beverage [Member] | Operating Segments [Member] | Material Handling [Member]
Disaggregation Of Revenue [Line Items]
Net sales									101,610
Industrial [Member]
Disaggregation Of Revenue [Line Items]
Net sales									142,068
Industrial [Member] | Operating Segments [Member] | Material Handling [Member]
Disaggregation Of Revenue [Line Items]
Net sales									142,168
Industrial [Member] | Inter-company [Member]
Disaggregation Of Revenue [Line Items]
Net sales									(100)
Auto Aftermarket [Member]
Disaggregation Of Revenue [Line Items]
Net sales									149,636
Auto Aftermarket [Member] | Operating Segments [Member] | Distribution [Member]
Disaggregation Of Revenue [Line Items]
Net sales									$ 149,636