BUSINESS SEGMENT INFORMATION (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended				6 Months Ended
	Jul. 31, 2012		Jul. 31, 2011		Jul. 31, 2012		Jul. 31, 2011
BUSINESS SEGMENT INFORMATION [Abstract]
Number of geographic regions					4
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue	$ 60,969		$ 61,957		$ 124,677		$ 121,360
Percentage of sales into Canada to North America total revenue (in hundredths)	3.00%		3.00%		3.00%		3.00%
North America [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue	26,211	[1]	25,204	[1]	54,729	[1]	50,484	[1]
EMEA [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue	18,809		18,601		37,358		37,051
Asia Pacific [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue	11,851		13,140		23,610		23,767
Latin America [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue	$ 4,098		$ 5,012		$ 8,980		$ 10,058

[1] Sales into Canada accounted for 3% of North America total revenue in the three and six months ended July 31, 2012 and for 3% of North America total revenue for the three and six months ended July 31, 2011.