CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Feb. 02, 2013	Jan. 28, 2012	Jan. 29, 2011
CONSOLIDATED STATEMENTS OF OPERATIONS [Abstract]
Net sales	$ 818,700	$ 732,645	$ 664,954
Cost of goods sold, including distribution center and store occupancy costs	519,818	470,237	434,552
Gross profit	298,882	262,408	230,402
Store operating, selling and administrative expenses	169,872	155,672	143,232
Depreciation and amortization	13,029	13,205	13,623
Operating income	115,981	93,531	73,547
Interest income	14	25	42
Interest expense	(182)	(242)	(147)
Interest expense, net	(168)	(217)	(105)
Income before provision for income taxes	115,813	93,314	73,442
Provision for income taxes	43,231	34,254	27,042
Net income	$ 72,582	$ 59,060	$ 46,400
Basic earnings per share (in dollars per share)	$ 2.78	$ 2.19	$ 1.63
Diluted earnings per share (in dollars per share)	$ 2.72	$ 2.15	$ 1.60
Weighted average shares outstanding:
Basic (in shares)	26,132	26,978	28,426
Diluted (in shares)	26,638	27,506	29,033