LONG-TERM DEBT LONG-TERM DEBT - PRIOR CREDIT AGREEMENT - INTEREST RATE DETAILS (Details) - Prior Credit Agreement (as amended)	12 Months Ended
	Jan. 31, 2018
Base Rate | Base Rate loans
Debt Instrument [Line Items]
Debt Instrument, Description of Variable Rate Basis	base rate
Debt Instrument, Basis Spread on Variable Rate	1.75%
Adjusted LIBO Rate | Eurodollar loans
Debt Instrument [Line Items]
Debt Instrument, Description of Variable Rate Basis	Adjusted LIBOR Rate
Debt Instrument, Basis Spread on Variable Rate	2.75%