FAIR VALUE MEASUREMENTS AND DERIVATIVES (Details 2) - USD ($) $ in Millions	9 Months Ended
Oct. 31, 2015	Jan. 31, 2015
FAIR VALUE MEASUREMENTS AND DERIVATIVES
Increase (decrease) in fair value of derivative	$ (0.2)
Fair value of derivative liability	$ 0.8	$ 0.6

Fair value as of the balance sheet date of all interest rate derivative liabilities designated as cash flow hedging instruments.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 4B

-Subparagraph (c)(1)

-URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5624163-113959

Name:	us-gaap_InterestRateCashFlowHedgeLiabilityAtFairValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant