LONG-TERM DEBT LONG-TERM DEBT - LOSS ON EARLY RETIREMENT OF 2014 TERM LOANS (Details) - USD ($) $ in Thousands		12 Months Ended
	Jun. 29, 2017	Jan. 31, 2018	Jan. 31, 2017	Jan. 31, 2016
Debt Instrument [Line Items]
Unamortized Debt Issuance Expense		$ 4,000
Unamortized debt discount		42,100
Losses on early retirements of debt		$ 2,150	$ 0	$ 0
Prior Credit Agreement (as amended)
Debt Instrument [Line Items]
Unamortized Debt Issuance Expense	$ 3,200
Prior Revolving Credit Facility
Debt Instrument [Line Items]
Unamortized Debt Issuance Expense	1,400
2014 Term Loans
Debt Instrument [Line Items]
Write off of Deferred Debt Issuance Cost	1,800
Unamortized debt discount	100
Losses on early retirements of debt	$ (1,900)