DEFERRED REVENUES (Details) (USD $) In Thousands, unless otherwise specified	Jan. 31, 2013	Jan. 31, 2012
Deferred Revenue Arrangement [Line Items]
Deferred revenues, current	$ 101,193	$ 93,871
Deferred revenues, non-current (in "Other liabilities")	600	1,280
Total deferred revenues	101,793	95,151
Deferred Maintenance Revenue [Member]
Deferred Revenue Arrangement [Line Items]
Deferred revenues, current	85,823	83,400
Deferred License Revenue [Member]
Deferred Revenue Arrangement [Line Items]
Deferred revenues, current	6,837	1,806
Deferred Subscription Revenue [Member]
Deferred Revenue Arrangement [Line Items]
Deferred revenues, current	5,456	3,696
Deferred Services Revenue [Member]
Deferred Revenue Arrangement [Line Items]
Deferred revenues, current	2,960	3,507
Deferred Other Revenue [Member]
Deferred Revenue Arrangement [Line Items]
Deferred revenues, current	$ 117	$ 1,462