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Inventories
9 Months Ended
Oct. 31, 2011
Inventories [Abstract]  
INVENTORIES
4.  
INVENTORIES
                         
(in thousands)   October 31, 2011     January 31, 2011     October 31, 2010  
Finished goods
  $ 1,173,673     $ 988,085     $ 1,090,853  
Raw materials
    737,686       534,879       464,701  
Work-in-process
    154,107       102,338       98,998  
 
                 
Inventories, net
  $ 2,065,466     $ 1,625,302     $ 1,654,552