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Other Income (Expense), Net (Tables)
 6 Months Ended
Jul. 31, 2012
Notes To Financial Statements [Abstract]  
Other Income (Expense), Net
Other income (expense), net was comprised of the following:

 
Three months ended July 31,
 
Six months ended July 31,
 
2012
 
2011
 
2012
 
2011
Interest income
$
474

 
$
535

 
$
949

 
$
1,069

Foreign currency exchange gain (loss)
(601
)
 
257

 
(816
)
 
(394
)
Other, net
(252
)
 
(263
)
 
(429
)
 
(621
)
Other income (expense), net
$
(379
)
 
$
529

 
$
(296
)
 
$
54