Consolidated Statements of Income (Unaudited) (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
Consolidated Statements of Income [Abstract]
Net sales	$ 202,059	$ 172,770	$ 407,674	$ 345,645
Cost of goods sold (includes certain buying, occupancy and distribution center expenses)	122,528	105,141	248,462	210,769
Gross profit	79,531	67,629	159,212	134,876
Selling, general, and administrative expense	57,801	48,867	111,596	94,240
Depreciation and amortization expense	8,017	6,410	15,545	12,513
Income from operations	13,713	12,352	32,071	28,123
Income before income taxes	13,735	12,371	32,123	28,164
Interest income, net	(22)	(19)	(52)	(41)
Provision for income taxes	4,645	4,702	11,430	10,875
Net income	$ 9,090	$ 7,669	$ 20,693	$ 17,289
Basic income per common share	$ 0.37	$ 0.31	$ 0.85	$ 0.71
Diluted income per common share	$ 0.36	$ 0.31	$ 0.83	$ 0.69
Weighted average basic common shares outstanding	24,420	24,415	24,458	24,394
Weighted average diluted common shares outstanding	25,022	25,080	25,079	25,066