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DEFERRED REVENUES (Details) (USD $) In Thousands, unless otherwise specified	Apr. 30, 2015	Jan. 31, 2015
Deferred Revenue Arrangement [Line Items]
Deferred revenues, current	$ 91,408us-gaap_DeferredRevenueCurrent	$ 102,721us-gaap_DeferredRevenueCurrent
Deferred revenues, non-current (in Other liabilities)	2,114us-gaap_DeferredRevenueNoncurrent	2,361us-gaap_DeferredRevenueNoncurrent
Total deferred revenues	93,522us-gaap_DeferredRevenue	105,082us-gaap_DeferredRevenue
Deferred Maintenance Revenue [Member]
Deferred Revenue Arrangement [Line Items]
Deferred revenues, current	75,744	86,381
Deferred Subscription Revenue [Member]
Deferred Revenue Arrangement [Line Items]
Deferred revenues, current	11,622	11,563
Deferred Services Revenue [Member]
Deferred Revenue Arrangement [Line Items]
Deferred revenues, current	2,621	2,813
Deferred License Revenue [Member]
Deferred Revenue Arrangement [Line Items]
Deferred revenues, current	1,028	1,890
Deferred Other Revenue [Member]
Deferred Revenue Arrangement [Line Items]
Deferred revenues, current	$ 393	$ 74