Summary of Total Cost and Employer Contributions (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jan. 02, 2021	Dec. 28, 2019	Dec. 29, 2018
401(k) Retirement Savings Plans
Defined Benefit Plan Disclosure [Line Items]
Total cost and employer contributions	$ 28,081	$ 27,995	$ 27,336