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Net Income Per Share
6 Months Ended
Aug. 31, 2011
Net Income Per Share [Abstract]  
Net Income Per Share
5. Net Income Per Share

Basic net income per share is calculated using the weighted-average number of common shares outstanding during the period. Diluted net income per share is calculated using the sum of the weighted-average number of common shares outstanding during the period, plus the dilutive effect of shares issuable through stock options.

The shares used in calculating basic and diluted net income per share for the condensed consolidated statements of operations included within this report are reconciled as follows (in thousands) :

   
Three Months Ended August 31
  
Six Months Ended August 31
 
   
2011
  
2010
  
2011
  
2010
 
Weighted average shares outstanding for basic net income per share
  23,065   22,606   23,047   22,540 
Dilutive effect of stock options and restricted stock units
  428   150   469   232 
Weighted average shares outstanding for diluted net income per share
  23,493   22,756   23,516   22,772 

Options covering approximately 1.8 million and 1.5 million shares for the three month periods ended August 31, 2011 and 2010, and approximately 1.6 million and 1.6 million shares for the six month periods ended August 31, 2011 and 2010, respectively, were excluded from the computation of average shares outstanding for diluted net income per share because their effects were antidilutive.