LONG-TERM DEBT LONG-TERM DEBT - 2017 CREDIT AGREEMENT ISSUANCE COSTS (Details) - USD ($) $ in Thousands	6 Months Ended
Jul. 31, 2017	Jul. 31, 2016
Debt Instrument
Amortization of Debt Issuance Costs	$ 6,482	$ 249
2017 Credit Agreement
Debt Instrument
Amortization of Debt Issuance Costs	6,800
2017 Term Loan
Debt Instrument
Amortization of Debt Issuance Costs	4,100
2017 Revolving Credit Facility
Debt Instrument
Amortization of Debt Issuance Costs	$ 2,700

The cash outflow paid to third parties in connection with debt origination, which will be amortized over the remaining maturity period of the associated long-term debt.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (e)
-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3291-108585

Name:	us-gaap_PaymentsOfDebtIssuanceCosts
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration