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Pro Forma Consolidated Results of Operations (Detail) (USD $)
In Thousands, except Per Share data, unless otherwise specified
 3 Months Ended 6 Months Ended
Jul. 13, 2013
Jul. 14, 2012
Jul. 13, 2013
Jul. 14, 2012
Acquisition [Abstract]        
Sales, As reported $ 898,153 $ 681,561 $ 2,028,963 $ 1,579,767
Sales, Pro forma   730,906   1,679,288
Net income, As reported 46,460 28,380 159,735 66,323
Net income, Pro forma   $ 29,439   $ 67,878
Basic net income per common share, As reported $ 0.22 $ 0.14 $ 0.77 $ 0.33
Basic net income per common share, Pro forma   $ 0.14   $ 0.33
Diluted net income per common share, As reported $ 0.22 $ 0.14 $ 0.76 $ 0.32
Diluted net income per common share, Pro forma   $ 0.14   $ 0.32