SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - CONSOLIDATION (Details)	12 Months Ended
Jan. 31, 2016
Less than
Basis of Presentation
Maximum ownership interest in cost method investments (as a percent)	20.00%
Joint venture, variable interest entity in which entity is primary beneficiary
Basis of Presentation
Equity interest in a joint venture (as a percent)	50.00%

Percentage of the Variable Interest Entity's (VIE) voting interest owned by (or beneficial interest in) the reporting entity (directly or indirectly).

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 50
-Paragraph 5A
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=52262685&loc=SL6759159-111685

Name:	us-gaap_VariableInterestEntityOwnershipPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration