UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Aug. 03, 2013	Jul. 28, 2012	Aug. 03, 2013	Jul. 28, 2012
UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS [Abstract]
Net sales	$ 186,235	$ 165,445	$ 426,228	$ 398,359
Cost of goods sold, including distribution center and store occupancy costs	122,308	108,920	271,424	253,405
Gross profit	63,927	56,525	154,804	144,954
Store operating, selling and administrative expenses	43,642	40,968	88,754	83,772
Depreciation and amortization	3,319	3,180	6,644	6,406
Operating income	16,966	12,377	59,406	54,776
Interest expense, net	42	41	88	89
Income before provision for income taxes	16,924	12,336	59,318	54,687
Provision for income taxes	6,382	4,441	22,562	20,429
Net income	$ 10,542	$ 7,895	$ 36,756	$ 34,258
Earnings per share:
Basic earnings per share	$ 0.41	$ 0.30	$ 1.42	$ 1.30
Diluted earnings per share	$ 0.40	$ 0.30	$ 1.40	$ 1.28
Weighted average shares outstanding:
Basic	25,950	26,228	25,929	26,289
Diluted	26,318	26,702	26,323	26,800