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Earnings Per Share (Tables)
6 Months Ended
Aug. 26, 2011
Earnings Per Share [Abstract]  
Computation of earnings per share and earnings per share-assuming dilution
                                 
    Three Months Ended     Six Months Ended  
    August 26,     August 27,     August 26,     August 27,  
    2011     2010     2011     2010  
Numerator (in thousands):
                               
Net income
  $ 14,476     $ 8,532     $ 47,069     $ 39,371  
 
                       
 
                               
Denominator (in thousands):
                               
Weighted average shares outstanding
    40,697       40,027       40,599       39,833  
Effect of dilutive securities:
                               
Stock options and awards
    992       848       1,244       1,029  
 
                       
Weighted average shares outstanding — assuming dilution
    41,689       40,875       41,843       40,862  
 
                       
 
                               
Earnings per share
  $ 0.36     $ 0.21     $ 1.16     $ 0.99  
 
                       
 
                               
Earnings per share — assuming dilution
  $ 0.35     $ 0.21     $ 1.12     $ 0.96