BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) $ in Thousands	12 Months Ended			162 Months Ended
	Feb. 03, 2018 USD ($) Segment shares	Jan. 28, 2017 USD ($) shares	Jan. 30, 2016 USD ($)	Feb. 03, 2018 USD ($) shares
Business [Abstract]
Operating Cycle, Period Disclosure	371 days	364 days	364 days
Segment Reporting [Abstract]
Number of reportable segments | Segment	1
Customers [Abstract]
Concentration risk	No customer accounted for more than 5.0% of our net sales
Advertising expense [Abstract]
Gross advertising costs	$ 13,356	$ 10,382	$ 9,983
Advertising reimbursements	(3,010)	(3,319)	(2,949)
Net advertising costs	10,346	7,063	7,034
Stock repurchase program [Abstract]
Amount authorized for Stock Repurchase Program	300,000			$ 300,000
Repurchased common stock (in shares) | shares				19,900,000
Cost of repurchased common stock	53,794	42,115	89,212	$ 593,200
Remaining amount available under Stock Repurchase Program	204,100			204,100
Cash and cash equivalents [Abstract]
Cash equivalents related to credit and debit card transactions	$ 3,900	3,700		3,900
Days to collect debit and credit card transactions (in days)	3 days
Investments [Abstract]
Investments included in other assets	$ 2,400	2,600		2,400
Net unrealized holding gains	300	100
Other Prepaid Expense, Current	500	100		500
Total Investments	2,900	2,700		2,900
Inventory and valuation [Abstract]
Accrual for inventory obsolescence	5,200	5,500		5,200
Accrual for inventory shrinkage	$ 1,400	1,300		$ 1,400
Property and equipment [Abstract]
Construction in progress, technology projects (in hundredths)	84.00%			84.00%
Deferred rent [Abstract]
Liability for the current portion of unamortized landlord allowances	$ 5,100	4,600		$ 5,100
Liability for long-term portion of unamortized landlord allowances	15,100	16,400		15,100
Estimate of the non-cash portion of landlord allowances	$ 1,200	1,400
Revenue recognition [Abstract]
Days allowed for entire purchase price for merchandise placed on layaway	within 30 days
Net deferred revenue liability	$ 6,200	5,800		6,200
Sales returns [Abstract]
Net sales returns	43,800	37,800	$ 34,800
Accrual for the effect of estimated returns on pre-tax income	$ 500	400		500
Equipment [Member] | Minimum [Member]
Property and equipment [Abstract]
Estimated service lives (in years)	3 years
Equipment [Member] | Maximum [Member]
Property and equipment [Abstract]
Estimated service lives (in years)	7 years
Furniture and Fixtures [Member]
Property and equipment [Abstract]
Estimated service lives (in years)	7 years
Buildings [Member]
Property and equipment [Abstract]
Estimated service lives (in years)	39 years
Leasehold Improvements [Member] | Minimum [Member]
Property and equipment [Abstract]
Estimated service lives (in years)	3 years
Leasehold Improvements [Member] | Maximum [Member]
Property and equipment [Abstract]
Estimated service lives (in years)	10 years
Health Claims [Member]
Insurance accrual [Abstract]
Accrual for insurance liability	$ 400	600		400
Workers Compensation and General Liability Stop-loss [Member]
Insurance accrual [Abstract]
Accrual for insurance liability	700	$ 700		700
Health Claims Stop-Loss, Per Year [Member]
Insurance accrual [Abstract]
Stop-loss insurance, maximum per covered person	200			200
Health Care Claims Stop-loss, Lifetime [Member]
Insurance accrual [Abstract]
Stop-loss insurance, maximum per covered person
Under November 2015 Authorization [Member]
Stock repurchase program [Abstract]
Repurchased common stock (in shares) | shares	2,800,000	1,200,000
Cost of repurchased common stock	$ 54,500	$ 43,100
Number of restricted stock unit awards repurchased to satisfy tax withholding requirements (in shares) | shares	24,432	25,993
Tax withholding requirements	$ 700	$ 900
Supplier Concentration Risk [Member] | Nike [Member]
Inventory and valuation [Abstract]
Percentage of purchases from supplier (in hundredths)	57.90%	57.00%	57.50%
Supplier Concentration Risk [Member] | Adidas [Member]
Inventory and valuation [Abstract]
Percentage of purchases from supplier (in hundredths)	11.00%	5.50%	4.20%
Supplier Concentration Risk [Member] | Under Armour [Member]
Inventory and valuation [Abstract]
Percentage of purchases from supplier (in hundredths)	10.80%	16.40%	15.90%