STOCK-BASED COMPENSATION, (Non-vested stock outstanding) (Details) - Non-vested Stock - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Jan. 28, 2017	Jan. 30, 2016	Jan. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Ratio of conversion to common stock at the end of vesting period	one for one
Number of shares issued in period	299,139
Number of shares
Outstanding at January 30, 2016	894,526
Granted	1,411,947
Vested	(384,756)
Forfeited	(325,307)
Outstanding at January 28, 2017	1,596,410	894,526
Weighted average grant date fair value (in dollars per share)
Outstanding at January 30, 2016	$ 20.20
Granted	6.75	$ 18.70	$ 22.81
Vested	19.04
Forfeited	12.18
Outstanding at January 28, 2017	$ 10.22	$ 20.20
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value [Abstract]
Aggregate intrinsic value, vested	$ 2.7	$ 5.4	$ 5.7
Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	1 year
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	4 years