Basic and Diluted Earnings per Common Share (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	4 Months Ended
	Apr. 20, 2013	Apr. 21, 2012
Earnings Per Share [Abstract]
Net income	$ 113,275	$ 37,943
Basic weighted average shares outstanding for common stock	138,111	135,496
Basic earnings per common share	$ 0.82	$ 0.28
Basic weighted average shares outstanding for common stock	138,111	135,496
Add: Shares of common stock assumed issued upon exercise of stock options, vesting of performance-contingent restricted stock, and deferred stock	2,499	1,686
Diluted weighted average shares outstanding for common stock	140,610	137,182
Diluted earnings per common share	$ 0.81	$ 0.28