BUSINESS SEGMENT INFORMATION (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended				6 Months Ended
	Jul. 31, 2014		Jul. 31, 2013		Jul. 31, 2014 Region Segment		Jul. 31, 2013
BUSINESS SEGMENT INFORMATION [Abstract]
Number of geographic regions					4
Number of operating segments					1
Revenues From External Customers And Long Lived Assets [Line Items]
Revenue	$ 73,050		$ 65,194		$ 141,535		$ 127,121
Percentage of sales into Canada to North America total revenue (in hundredths)	2.00%		2.00%		2.00%		3.00%
North America [Member]
Revenues From External Customers And Long Lived Assets [Line Items]
Revenue	30,907	[1]	27,538	[1]	60,046	[1]	54,104	[1]
EMEA [Member]
Revenues From External Customers And Long Lived Assets [Line Items]
Revenue	25,731		21,830		49,882		41,637
Asia Pacific [Member]
Revenues From External Customers And Long Lived Assets [Line Items]
Revenue	11,871		11,489		23,203		23,143
Latin America [Member]
Revenues From External Customers And Long Lived Assets [Line Items]
Revenue	$ 4,541		$ 4,337		$ 8,404		$ 8,237

[1] Sales into Canada accounted for 2% of North America total revenue for both the three and six months ended July 31, 2014 and for 2% and 3% of North America total revenue for the three and six months ended July 31, 2013, respectively.