Annual report pursuant to Section 13 and 15(d)

Summary Of Restricted Stock Activity (Detail)

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Summary Of Restricted Stock Activity (Detail) (USD $)
12 Months Ended
Aug. 30, 2012
Aug. 31, 2012
Aggregate Number of Restricted Shares    
Beginning Balance 1,193,922  
Granted 587,622  
Forfeited (130,952)  
Vested (143,149)  
Ending Balance 1,507,443  
Weighted Average Fair Value at Grant Date    
Beginning Balance $ 22.87 $ 22.87
Granted   $ 24.81
Forfeited   $ 22.57
Vested   $ 20.74
Ending Balance   $ 23.85