BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) (USD $)	12 Months Ended
	Jan. 28, 2012	Jan. 29, 2011	Jan. 30, 2010
Advertising expense [Abstract]
Gross advertising costs	$ 8,329,000	$ 7,314,000	$ 5,572,000
Advertising reimbursements	(3,748,000)	(3,389,000)	(2,268,000)
Net advertising costs	4,581,000	3,925,000	3,304,000
Customers [Abstract]
Concentration risk	less than 5.0%	less than 5.0%	less than 5.0%
Cash and cash equivalents [Abstract]
Cash equivalents related to credit and debit card transactions	3,000,000	3,600,000
Days to collect debit and credit card transactions (in days)	90 days or less	90 days or less
Investments [Abstract]
Investments included in other assets	1,400,000	900,000
Net unrealized holding gains	100,000	100,000
Trade and other accounts receivable [Abstract]
Allowance for doubtful accounts	49,000	47,000
Inventory and valuation [Abstract]
Accrual for inventory obsolescence	1,900,000	1,800,000
Accrual for inventory shrinkage	1,600,000	1,800,000
Vendor-owned inventories held at our locations	1,300,000	700,000
Percentage of construction in progress balance comprised of costs associated with technology projects (in hundredths)	95.00%
Deferred rent [Abstract]
Liability for the current portion of unamortized landlord allowances	3,100,000	3,400,000
Liability for long-term portion of unamortized landlord allowances	8,200,000	9,400,000
Estimate of the non-cash portion of landlord allowances	900,000	500,000
Revenue recognition [Abstract]
Days allowed for entire purchase price for merchandise placed on layaway (in days)	30D	30D
Gift card breakage revenue	200,000	200,000	300,000
Net deferred revenue liability	3,500,000	3,100,000
Sales returns [Abstract]
Net sales returns	25,700,000	23,200,000	20,300,000
Accrual for the effect of estimated returns on pre-tax income	400,000	400,000
Equipment [Member]
Property and equipment [Abstract]
Estimated service lives, minimum range (in years)	3
Estimated service lives, maximum range (in years)	5
Furniture and Fixtures [Member]
Property and equipment [Abstract]
Estimated service lives (in years)	7
Buildings [Member]
Property and equipment [Abstract]
Estimated service lives (in years)	39
Leasehold Improvements [Member]
Property and equipment [Abstract]
Estimated service lives, minimum range (in years)	3
Estimated service lives, maximum range (in years)	10
Health Claims [Member]
Insurance accrual [Abstract]
Accrual for insurance liability	800,000	900,000
Workers Compensation and General Liability Stop-loss [Member]
Insurance accrual [Abstract]
Accrual for insurance liability	400,000	400,000
Health Claims Stop-Loss, Per Year [Member]
Insurance accrual [Abstract]
Stop-loss insurance, maximum per covered person	200,000
Health Care Claims Stop-loss, Lifetime [Member]
Insurance accrual [Abstract]
Stop-loss insurance, maximum per covered person	1,900,000
Supplier Concentration Risk [Member] | Nike [Member]
Inventory and valuation [Abstract]
Percentage of purchases from supplier (in hundredths)	48.30%	47.80%	49.90%
Supplier Concentration Risk [Member] | Second Largest Vendor [Member]
Inventory and valuation [Abstract]
Percentage of purchases from supplier (in hundredths)	11.40%	8.30%	6.40%
Supplier Concentration Risk [Member] | Third Largest Vendor [Member]
Inventory and valuation [Abstract]
Percentage of purchases from supplier (in hundredths)	9.30%	8.10%	9.00%
Under November 2009 Authorization [Member]
Stock repurchase program [Abstract]
Amount authorized for Stock Repurchase Program	250,000,000
Repurchased common stock (in shares)	1,897,002	1,461,225
Cost of repurchased common stock	68,600,000	37,900,000
Number of restricted stock unit awards repurchased to satisfy tax withholding requirements (in shares)	36,352	6,130
Tax withholding requirements	1,100,000	200,000
Remaining amount available under Stock Repurchase Program	144,700,000
Under August 2004 Authorization [Member]
Stock repurchase program [Abstract]
Repurchased common stock (in shares)	7,761,813
Cost of repurchased common stock	166,900,000
Remaining amount available under Stock Repurchase Program	$ 0