UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jul. 28, 2012	Jul. 30, 2011	Jul. 28, 2012	Jul. 30, 2011
UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS [Abstract]
Net sales	$ 165,445	$ 153,127	$ 398,359	$ 356,783
Cost of goods sold, including distribution center and store occupancy costs	108,920	102,490	253,405	230,353
Gross profit	56,525	50,637	144,954	126,430
Store operating, selling and administrative expenses	40,968	37,969	83,772	76,342
Depreciation and amortization	3,180	3,300	6,406	6,580
Operating income	12,377	9,368	54,776	43,508
Interest expense, net	41	60	89	116
Income before provision for income taxes	12,336	9,308	54,687	43,392
Provision for income taxes	4,441	3,368	20,429	16,115
Net income	$ 7,895	$ 5,940	$ 34,258	$ 27,277
Earnings per share:
Basic earnings per share	$ 0.30	$ 0.22	$ 1.30	$ 1.00
Diluted earnings per share	$ 0.30	$ 0.21	$ 1.28	$ 0.98
Weighted average shares outstanding:
Basic	26,228	27,267	26,289	27,356
Diluted	26,702	27,804	26,800	27,889