INTANGIBLE ASSETS AND GOODWILL INTANGIBLE ASSETS AND GOODWILL - INTANGIBLE ASSETS BY REPORTABLE SEGMENT (Details) - USD ($) $ in Thousands	Jan. 31, 2018	Jan. 31, 2017
Finite-Lived Intangible Assets [Line Items]
Intangible assets, net	$ 226,093	$ 235,259
Customer Engagement
Finite-Lived Intangible Assets [Line Items]
Intangible assets, net	213,963	207,436
Cyber Intelligence
Finite-Lived Intangible Assets [Line Items]
Intangible assets, net	$ 12,130	$ 27,823

Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16212-109274

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph ((a)(1),(b))
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

Name:	us-gaap_IntangibleAssetsNetExcludingGoodwill
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant