Revenue Recognition - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Capitalized Contract Cost [Line Items]
Revenues	$ 251,412	$ 239,610	$ 746,635	$ 742,673
Seats
Capitalized Contract Cost [Line Items]
Revenues	97,923	76,346	269,707	240,399
Electrical wire harnesses, panels and assemblies
Capitalized Contract Cost [Line Items]
Revenues	51,813	56,345	151,363	160,067
Trim
Capitalized Contract Cost [Line Items]
Revenues	48,603	39,894	142,126	117,427
Warehouse Automation
Capitalized Contract Cost [Line Items]
Revenues	11,221	37,347	66,700	130,008
Cab structures
Capitalized Contract Cost [Line Items]
Revenues	29,236	18,643	83,613	60,991
Mirrors, wipers and controls
Capitalized Contract Cost [Line Items]
Revenues	12,616	11,035	33,126	33,781
Vehicle Solutions
Capitalized Contract Cost [Line Items]
Revenues	154,024	117,914	436,966	372,487
Vehicle Solutions | Seats
Capitalized Contract Cost [Line Items]
Revenues	77,843	60,813	212,956	197,272
Vehicle Solutions | Electrical wire harnesses, panels and assemblies
Capitalized Contract Cost [Line Items]
Revenues	45	597	45	1,906
Vehicle Solutions | Trim
Capitalized Contract Cost [Line Items]
Revenues	45,980	39,164	138,207	115,388
Vehicle Solutions | Warehouse Automation
Capitalized Contract Cost [Line Items]
Revenues	0	0	0	0
Vehicle Solutions | Cab structures
Capitalized Contract Cost [Line Items]
Revenues	28,739	15,863	83,116	53,230
Vehicle Solutions | Mirrors, wipers and controls
Capitalized Contract Cost [Line Items]
Revenues	1,417	1,477	2,642	4,691
Warehouse Automation
Capitalized Contract Cost [Line Items]
Revenues	14,116	51,681	76,789	150,378
Warehouse Automation | Seats
Capitalized Contract Cost [Line Items]
Revenues	0	0	0	0
Warehouse Automation | Electrical wire harnesses, panels and assemblies
Capitalized Contract Cost [Line Items]
Revenues	3,416	14,334	10,609	20,370
Warehouse Automation | Trim
Capitalized Contract Cost [Line Items]
Revenues	0	0	0	0
Warehouse Automation | Warehouse Automation
Capitalized Contract Cost [Line Items]
Revenues	10,700	37,347	66,180	130,008
Warehouse Automation | Cab structures
Capitalized Contract Cost [Line Items]
Revenues	0	0	0	0
Warehouse Automation | Mirrors, wipers and controls
Capitalized Contract Cost [Line Items]
Revenues	0	0	0	0
Electrical Systems
Capitalized Contract Cost [Line Items]
Revenues	46,129	40,085	133,350	130,742
Electrical Systems | Seats
Capitalized Contract Cost [Line Items]
Revenues	0	0	0	0
Electrical Systems | Electrical wire harnesses, panels and assemblies
Capitalized Contract Cost [Line Items]
Revenues	45,608	39,938	132,830	129,907
Electrical Systems | Trim
Capitalized Contract Cost [Line Items]
Revenues	0	0	0	0
Electrical Systems | Warehouse Automation
Capitalized Contract Cost [Line Items]
Revenues	521	0	520	0
Electrical Systems | Cab structures
Capitalized Contract Cost [Line Items]
Revenues	0	0	0	0
Electrical Systems | Mirrors, wipers and controls
Capitalized Contract Cost [Line Items]
Revenues	0	147	0	835
Aftermarket and Accessories
Capitalized Contract Cost [Line Items]
Revenues	37,143	29,930	99,530	89,066
Aftermarket and Accessories | Seats
Capitalized Contract Cost [Line Items]
Revenues	20,080	15,533	56,751	43,127
Aftermarket and Accessories | Electrical wire harnesses, panels and assemblies
Capitalized Contract Cost [Line Items]
Revenues	2,744	1,476	7,879	7,884
Aftermarket and Accessories | Trim
Capitalized Contract Cost [Line Items]
Revenues	2,623	730	3,919	2,039
Aftermarket and Accessories | Warehouse Automation
Capitalized Contract Cost [Line Items]
Revenues	0	0	0	0
Aftermarket and Accessories | Cab structures
Capitalized Contract Cost [Line Items]
Revenues	497	2,780	497	7,761
Aftermarket and Accessories | Mirrors, wipers and controls
Capitalized Contract Cost [Line Items]
Revenues	$ 11,199	$ 9,411	$ 30,484	$ 28,255