UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Per Share data	3 Months Ended		6 Months Ended
	Jul. 30, 2011	Jul. 31, 2010	Jul. 30, 2011	Jul. 31, 2010
UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS [Abstract]
Net sales	$ 153,127	$ 139,819	$ 356,783	$ 324,325
Cost of goods sold, including distribution center and store occupancy costs	102,490	95,044	230,353	213,441
Gross profit	50,637	44,775	126,430	110,884
Store operating, selling and administrative expenses	37,969	34,917	76,342	69,858
Depreciation and amortization	3,300	3,377	6,580	6,869
Operating income	9,368	6,481	43,508	34,157
Interest expense, net	60	44	116	51
Income before provision for income taxes	9,308	6,437	43,392	34,106
Provision for income taxes	3,368	2,424	16,115	12,752
Net income	$ 5,940	$ 4,013	$ 27,277	$ 21,354
Earnings per share:
Basic	$ 0.22	$ 0.14	$ 1.00	$ 0.74
Diluted	$ 0.21	$ 0.14	$ 0.98	$ 0.73
Weighted average shares outstanding:
Basic	27,267	28,786	27,356	28,768
Diluted	27,804	29,389	27,889	29,377