Revenue Recognition - Summary of Disaggregated Revenue (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 26, 2022	Mar. 27, 2021
Disaggregation Of Revenue [Line Items]
Total	$ 401,579	$ 288,012
U.S. Customers [Member]
Disaggregation Of Revenue [Line Items]
Total	373,618	273,150
Non-U.S. Customers [Member]
Disaggregation Of Revenue [Line Items]
Total	27,961	14,862
Powertrain [Member]
Disaggregation Of Revenue [Line Items]
Total	152,228	121,105
Chassis [Member]
Disaggregation Of Revenue [Line Items]
Total	160,862	85,510
Automotive Body [Member]
Disaggregation Of Revenue [Line Items]
Total	73,280	68,645
Hardware [Member]
Disaggregation Of Revenue [Line Items]
Total	$ 15,209	$ 12,752