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Inventories
3 Months Ended
Jun. 30, 2011
Inventories [Abstract]  
Inventories
3.   Inventories:

Inventories, net of reserves for obsolescence, consist of the following (in thousands):

   
June 30, 2011
  
March 31, 2011
 
Raw materials
 $70,493  $79,237 
Work in process
  9,203   18,569 
Finished goods
  432,645   353,559 
   $512,341  $451,365