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Stock-Based Compensation (Tables)
9 Months Ended
Oct. 31, 2011
Stock-Based Compensation [Abstract]  
Schedule Of Stock Options Activity
     Shares  

Outstanding at January 31, 2011

     2,881,356   

Granted

     12,882   

Exercised

     (1,116,534

Canceled

     (21,394
  

 

 

 

Outstanding at October 31, 2011

     1,756,310   
  

 

 

 
Schedule Of Restricted Stock Activity
     Shares  

Outstanding at January 31, 2011

     543,841   

Granted

     267,554   

Vested

     (206,625

Canceled

     (29,488
  

 

 

 

Outstanding at October 31, 2011

     575,282