Revenue Recognition - Summary of Disaggregated Net Sales (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 25, 2021	Dec. 26, 2020
Disaggregation Of Revenue [Line Items]
Net Sales	$ 1,733,749	$ 1,345,249	$ 1,092,748
Net Sales to U.S. Customers
Disaggregation Of Revenue [Line Items]
Net Sales	1,606,472	1,269,050	1,031,183
Net Sales to Non-U.S. Customers
Disaggregation Of Revenue [Line Items]
Net Sales	127,277	76,199	61,565
Powertrain
Disaggregation Of Revenue [Line Items]
Net Sales	644,059	539,235	442,221
Chassis
Disaggregation Of Revenue [Line Items]
Net Sales	715,005	458,986	324,399
Motor Vehicle Body
Disaggregation Of Revenue [Line Items]
Net Sales	314,451	288,599	266,699
Hardware
Disaggregation Of Revenue [Line Items]
Net Sales	$ 60,234	$ 58,429	$ 59,429