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Segment Reporting (Tables)
3 Months Ended
Apr. 30, 2012
Segment Reporting [Abstract]  
Schedule Of Operations By Segment
Schedule Of Revenues And Long-Lived Assets, By Domestic And Foreign Operations Segment
April 30,
2012
     January 31,
2012
     April 30,
2011
 

Property and equipment, net

        

Domestic operations

   $ 570,663       $ 557,512       $ 499,025   

Foreign operations

     141,269         127,467         102,224   
  

 

 

    

 

 

    

 

 

 

Total property and equipment, net

   $ 711,932       $ 684,979       $ 601,249   
  

 

 

    

 

 

    

 

 

 

 

     Three Months Ended
April 30,
 
     2012      2011  

Net sales

     

Domestic operations

   $ 500,608       $ 466,851   

Foreign operations

     68,322         57,168   
  

 

 

    

 

 

 

Total net sales

   $ 568,930       $ 524,019