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Basic and Diluted Earnings per Common Share (Detail) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended 6 Months Ended
Jul. 18, 2015
Jul. 12, 2014
Jul. 18, 2015
Jul. 12, 2014
Earnings Per Share [Abstract]        
Net income $ 51,760 $ 42,064 $ 113,149 $ 103,130
Basic:        
Basic weighted average shares outstanding for common stock 210,334 209,639 210,093 209,354
Basic earnings per common share $ 0.25 $ 0.20 $ 0.54 $ 0.49
Diluted:        
Basic weighted average shares outstanding for common stock 210,334 209,639 210,093 209,354
Add: Shares of common stock assumed issued upon exercise of stock options and vesting of restricted stock 2,538 3,280 2,705 3,552
Diluted weighted average shares outstanding for common stock 212,872 212,919 212,798 212,906
Diluted earnings per common share $ 0.24 $ 0.20 $ 0.53 $ 0.48