Segment Reporting - Segment Results (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Segment Reporting Information [Line Items]
Revenues	$ 251,412	$ 239,610	$ 746,635	$ 742,673
Gross profit	26,842	30,144	74,104	95,633
Selling, general & administrative expenses	17,304	18,772	49,955	52,529
Operating income	9,538	11,372	24,149	43,104
Vehicle Solutions
Segment Reporting Information [Line Items]
Revenues	154,024	117,914	436,966	372,487
Warehouse Automation
Segment Reporting Information [Line Items]
Revenues	14,116	51,681	76,789	150,378
Electrical Systems
Segment Reporting Information [Line Items]
Revenues	46,129	40,085	133,350	130,742
Aftermarket and Accessories
Segment Reporting Information [Line Items]
Revenues	37,143	29,930	99,530	89,066
Operating Segments | Vehicle Solutions
Segment Reporting Information [Line Items]
Revenues	154,024	117,914	436,966	372,487
Gross profit	13,839	10,143	35,657	38,914
Selling, general & administrative expenses	4,279	7,222	18,269	20,269
Operating income	9,560	2,921	17,388	18,645
Operating Segments | Warehouse Automation
Segment Reporting Information [Line Items]
Revenues	14,116	51,681	76,789	150,378
Gross profit	404	9,486	8,249	24,612
Selling, general & administrative expenses	1,371	1,461	4,242	4,199
Operating income	(967)	8,025	4,007	20,413
Operating Segments | Electrical Systems
Segment Reporting Information [Line Items]
Revenues	46,129	40,085	133,350	130,742
Gross profit	6,210	6,633	16,857	17,545
Selling, general & administrative expenses	1,055	1,718	3,998	4,646
Operating income	5,155	4,915	12,859	12,899
Operating Segments | Aftermarket and Accessories
Segment Reporting Information [Line Items]
Revenues	37,143	29,930	99,530	89,066
Gross profit	6,389	3,885	13,341	14,605
Selling, general & administrative expenses	1,436	1,536	4,636	4,407
Operating income	4,953	2,349	8,705	10,198
Corporate/Other
Segment Reporting Information [Line Items]
Revenues	0	0	0	0
Gross profit	0	(3)	0	(43)
Selling, general & administrative expenses	9,163	6,835	18,810	19,008
Operating income	$ (9,163)	$ (6,838)	$ (18,810)	$ (19,051)