Summary of Company's Stock-Based Compensation Expense (Detail) - USD ($) $ in Thousands	4 Months Ended
	Apr. 24, 2021	Apr. 18, 2020
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total stock-based compensation	$ 7,182	$ 3,894
Performance Contingent Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total stock-based compensation	5,289	2,614
Time-Based Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total stock-based compensation	1,467	947
Deferred Stock
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total stock-based compensation	$ 426	$ 333