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Segment Reporting (Tables)
6 Months Ended
Jul. 31, 2013
Segment Reporting [Abstract]  
Revenues related to operations in geographic regions
Revenues related to operations in the geographic regions were:
 
 
Three months ended July 31,
 
Six months ended July 31,
 
2013
 
2012
 
2013
 
2012
Revenues:
 
 
 
 
 
 
 
North America
$
96,587

 
$
101,553

 
$
195,727

 
$
230,663

Europe
45,701

 
53,964

 
94,408

 
106,595

Japan
16,477

 
38,181

 
43,154

 
63,164

Pacific Rim
94,451

 
47,113

 
146,442

 
88,307

Total revenues
$
253,216

 
$
240,811

 
$
479,731

 
$
488,729