UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Nov. 02, 2013	Oct. 27, 2012	Nov. 02, 2013	Oct. 27, 2012
UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS [Abstract]
Net sales	$ 207,971	$ 202,934	$ 634,198	$ 601,293
Cost of goods sold, including distribution center and store occupancy costs	131,483	127,494	402,907	380,900
Gross profit	76,488	75,440	231,291	220,393
Store operating, selling and administrative expenses	45,496	41,933	134,251	125,705
Depreciation and amortization	3,549	3,207	10,193	9,613
Operating income	27,443	30,300	86,847	85,075
Interest expense, net	55	39	142	127
Income before provision for income taxes	27,388	30,261	86,705	84,948
Provision for income taxes	10,138	11,296	32,700	31,725
Net income	$ 17,250	$ 18,965	$ 54,005	$ 53,223
Earnings per share:
Basic (in dollars per share)	$ 0.67	$ 0.73	$ 2.09	$ 2.03
Diluted (in dollars per share)	$ 0.66	$ 0.71	$ 2.05	$ 1.99
Weighted average shares outstanding:
Basic (in dollars per share)	25,823	26,125	25,893	26,234
Diluted (in dollars per share)	26,282	26,613	26,309	26,738