Revenue Recognition - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Capitalized Contract Cost [Line Items]
Revenues	$ 250,849	$ 257,941	$ 495,223	$ 503,063
Seats
Capitalized Contract Cost [Line Items]
Revenues	86,188	82,475	171,783	164,053
Electrical wire harnesses, panels and assemblies
Capitalized Contract Cost [Line Items]
Revenues	54,555	50,177	99,550	103,723
Trim
Capitalized Contract Cost [Line Items]
Revenues	47,469	40,215	93,523	77,532
Warehouse Automation
Capitalized Contract Cost [Line Items]
Revenues	23,150	51,540	55,480	92,661
Cab structures
Capitalized Contract Cost [Line Items]
Revenues	28,787	21,688	54,377	42,348
Mirrors, wipers and controls
Capitalized Contract Cost [Line Items]
Revenues	10,700	11,846	20,510	22,746
Vehicle Solutions
Capitalized Contract Cost [Line Items]
Revenues	142,785	130,230	282,941	254,572
Vehicle Solutions | Seats
Capitalized Contract Cost [Line Items]
Revenues	65,304	68,958	135,112	136,459
Vehicle Solutions | Electrical wire harnesses, panels and assemblies
Capitalized Contract Cost [Line Items]
Revenues	0	614	0	1,309
Vehicle Solutions | Trim
Capitalized Contract Cost [Line Items]
Revenues	47,469	39,466	92,227	76,223
Vehicle Solutions | Warehouse Automation
Capitalized Contract Cost [Line Items]
Revenues	0	0	0	0
Vehicle Solutions | Cab structures
Capitalized Contract Cost [Line Items]
Revenues	28,787	19,454	54,377	37,367
Vehicle Solutions | Mirrors, wipers and controls
Capitalized Contract Cost [Line Items]
Revenues	1,225	1,738	1,225	3,214
Warehouse Automation
Capitalized Contract Cost [Line Items]
Revenues	28,547	54,324	62,673	98,696
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	5,397	2,784	7,193	6,035
Warehouse Automation | Trim
Capitalized Contract Cost [Line Items]
Revenues	0	0	0	0
Warehouse Automation | Warehouse Automation
Capitalized Contract Cost [Line Items]
Revenues	23,150	51,540	55,480	92,661
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	47,345	44,195	87,222	90,657
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	47,345	43,842	87,222	89,970
Electrical Systems | Trim
Capitalized Contract Cost [Line Items]
Revenues	0	0	0	0
Electrical Systems | Warehouse Automation
Capitalized Contract Cost [Line Items]
Revenues	0	0	0	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	353	0	687
Aftermarket and Accessories
Capitalized Contract Cost [Line Items]
Revenues	32,172	29,192	62,387	59,138
Aftermarket and Accessories | Seats
Capitalized Contract Cost [Line Items]
Revenues	20,884	13,517	36,671	27,594
Aftermarket and Accessories | Electrical wire harnesses, panels and assemblies
Capitalized Contract Cost [Line Items]
Revenues	1,813	2,937	5,135	6,409
Aftermarket and Accessories | Trim
Capitalized Contract Cost [Line Items]
Revenues	0	749	1,296	1,309
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	0	2,234	0	4,981
Aftermarket and Accessories | Mirrors, wipers and controls
Capitalized Contract Cost [Line Items]
Revenues	$ 9,475	$ 9,755	$ 19,285	$ 18,845