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Inventories (Tables)
12 Months Ended
Feb. 28, 2013
Inventories [Abstract]  
Components of inventories
                 
    2013     2012  

Raw material

  $ 14,470     $ 22,217  

Work-in-process

    11,238       11,194  

Finished goods

    83,990       99,161  
   

 

 

   

 

 

 
    $ 109,698     $ 132,572