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Segment Reporting (Tables)
3 Months Ended
Apr. 30, 2013
Segment Reporting [Abstract]  
Revenues Related to Operations in Geographic Regions
Revenues related to operations in the geographic regions were:
 
Three months ended April 30,
2013
 
2012
Revenues:
 
 
 
North America
$
99,140

 
$
129,110

Europe
48,707

 
52,631

Japan
26,677

 
24,983

Pacific Rim
51,991

 
41,194

Total revenues
$
226,515

 
$
247,918