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Comprehensive Income (Tables)
9 Months Ended
Apr. 27, 2012
Comprehensive Income [Abstract]  
Comprehensive income
Comprehensive income consisted of the following at:
 
   
Quarter Ended
  
Nine Months Ended
 
   
April 27,
2012
  
April 29,
2011
  
April 27,
2012
  
April 29,
2011
 
              
Net income
 $18,974  $15,154  $68,385  $67,665 
  Other comprehensive income:
                
    Changes in fair value of interest rate swaps, net of tax
   4,540    2,329    10,902    11,905 
  Total comprehensive income
 $23,514  $17,483  $79,287  $79,570