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Acquisitions (Tables)
6 Months Ended
Jun. 25, 2011
Acquisitions  
Pro forma results of operations

 

 
  Thirteen Weeks
Ended
June 26, 2010
  Twenty-six Weeks
Ended
June 26, 2010
 

Net sales

  $ 545,192   $ 1,041,379  

Net earnings

    29,578     37,985  

Earnings per share—diluted

  $ 1.14   $ 1.46