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Net Income Per Share (Tables)
12 Months Ended
Aug. 27, 2011
Net Income Per Share 
Basic And Diluted Net Income Per Common Share Under The Two-Class Method
                         
   
For the Fiscal Years Ended
 
   
August 27,
   
August 28,
   
August 29,
 
   
2011
   
2010
   
2009
 
                   
Net income as reported.
  $ 218,786     $ 150,373     $ 125,122  
Less: Distributed net income available to participating securities
    (932 )     (411 )     (371 )
Less: Undistributed net income available to participating securities
    (948 )     (960 )     (681 )
Numerator for basic net income per share:
                       
Undistributed and distributed net income available to common shareholders
  $ 216,906     $ 149,002     $ 124,070  
Add: Undistributed net income allocated to participating securities
    948       960       681  
Less: Undistributed net income reallocated to participating securities
    (942 )     (953 )     (675 )
                         
Numerator for diluted net income per share:
                       
Undistributed and distributed net income available to common shareholders
  $ 216,912     $ 149,009     $ 124,076  
                         
Denominator:
                       
Weighted average shares outstanding for basic net income per share
    62,902       62,438       61,798  
Effect of dilutive securities
    422       492       564  
Weighted average shares outstanding for diluted net income per share
    63,324       62,930       62,362  
                         
Net income per share Two-Class Method:
                       
Basic
  $ 3.45     $ 2.39     $ 2.01  
Diluted
  $ 3.43     $ 2.37     $ 1.99