Condensed Consolidated Statements of Operations and Comprehensive 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
Income Statement [Abstract]
Net sales	$ 381,624	$ 352,832	$ 747,318	$ 699,315
Cost of sales and related buying, occupancy and distribution expenses	266,450	248,975	538,305	510,238
Gross profit	115,174	103,857	209,013	189,077
Selling, general and administrative expenses	94,747	86,075	187,487	169,677
Store opening costs	583	906	1,528	3,640
Interest expense, net of income of $0 and $2 for the thirteen weeks and $0 and $24 for the twenty-six weeks, respectively	951	885	1,782	1,791
Income before income tax	18,893	15,991	18,216	13,969
Income tax expense	7,231	5,978	6,972	4,417
Net income	11,662	10,013	11,244	9,552
Other comprehensive income:
Amortization of employee benefit related costs, net of tax of $79	64	25	128	49
Total other comprehensive income	64	25	128	49
Comprehensive income	$ 11,726	$ 10,038	$ 11,372	$ 9,601
Basic and diluted (loss) earnings per share data:
Basic earning per share (in dollars per share)	$ 0.37	$ 0.29	$ 0.36	$ 0.27
Basic weighted average shares outstanding (in shares)	31,010	34,236	30,773	35,258
Diluted earnings per share (in dollars per share)	$ 0.37	$ 0.29	$ 0.36	$ 0.27
Diluted weighted average shares outstanding (in shares)	31,225	34,635	30,988	35,725