Segment Reporting (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Segment Reporting Information [Line Items]
Revenues	$ 244,374	$ 245,122
Gross profit	25,383	31,121
Selling, general & administrative expenses	16,999	15,718
Operating income	8,384	15,403
Vehicle Solutions
Segment Reporting Information [Line Items]
Revenues	140,157	124,342
Warehouse Automation
Segment Reporting Information [Line Items]
Revenues	34,126	44,372
Electrical Systems
Segment Reporting Information [Line Items]
Revenues	39,876	46,462
Aftermarket and Accessories
Segment Reporting Information [Line Items]
Revenues	30,215	29,946
Operating Segments | Vehicle Solutions
Segment Reporting Information [Line Items]
Revenues	140,157	124,342
Gross profit	12,907	13,808
Selling, general & administrative expenses	6,588	6,325
Operating income	6,319	7,483
Operating Segments | Warehouse Automation
Segment Reporting Information [Line Items]
Revenues	34,126	44,372
Gross profit	4,991	5,440
Selling, general & administrative expenses	1,324	1,531
Operating income	3,667	3,909
Operating Segments | Electrical Systems
Segment Reporting Information [Line Items]
Revenues	39,876	46,462
Gross profit	3,401	6,324
Selling, general & administrative expenses	1,640	1,468
Operating income	1,761	4,856
Operating Segments | Aftermarket and Accessories
Segment Reporting Information [Line Items]
Revenues	30,215	29,946
Gross profit	4,086	5,585
Selling, general & administrative expenses	1,465	1,422
Operating income	2,621	4,163
Corporate/Other
Segment Reporting Information [Line Items]
Revenues	0	0
Gross profit	(2)	(36)
Selling, general & administrative expenses	5,982	4,972
Operating income	$ (5,984)	$ (5,008)