Summary of Company's Stock Based Compensation Expense (Detail) - USD ($) $ in Thousands	4 Months Ended
	Apr. 23, 2016	Apr. 25, 2015
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total stock based compensation	$ 7,779	$ 7,289
Performance Contingent Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total stock based compensation	7,116	6,556
Deferred stock
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total stock based compensation	674	642
Stock Appreciation Rights
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total stock based compensation	$ (11)	$ 91