CONSOLIDATED STATEMENTS OF STOCKHOLDERS' INVESTMENT (USD $)	12 Months Ended				12 Months Ended				12 Months Ended				12 Months Ended
	Jan. 28, 2012 Common Stock [Member]	Jan. 29, 2011 Common Stock [Member]	Jan. 30, 2010 Common Stock [Member]	Jan. 31, 2009 Common Stock [Member]	Jan. 28, 2012 Paid-in Capital [Member]	Jan. 29, 2011 Paid-in Capital [Member]	Jan. 30, 2010 Paid-in Capital [Member]	Jan. 31, 2009 Paid-in Capital [Member]	Jan. 28, 2012 Retained Earnings [Member]	Jan. 29, 2011 Retained Earnings [Member]	Jan. 30, 2010 Retained Earnings [Member]	Jan. 31, 2009 Retained Earnings [Member]	Jan. 28, 2012 Treasury Stock [Member]	Jan. 29, 2011 Treasury Stock [Member]	Jan. 30, 2010 Treasury Stock [Member]	Jan. 31, 2009 Treasury Stock [Member]
Consolidated Statements of Stockholders' Investment [Roll Forward]
Balance-beginning of period				$ 363,000				$ 92,153,000				$ 211,003,000				$ (166,944,000)
Balance-beginning of period (in shares)				36,304,735												7,761,813
Net income									59,060,000	46,400,000	32,549,000
Issuance of shares from the employee stock purchase plan and the exercise of stock options, including tax benefit	4,000	7,000	1,000		6,995,000	12,756,000	1,430,000
Issuance of shares from the employee stock purchase plan and the exercise of stock options, including tax benefit (in shares)	367,482	694,143	131,768
Tax shortfall on release of restricted stock and option exercises					51,000	67,000	6,000
Adjustment to income tax benefit from exercises of employee stock options					814,000	(1,024,000)	373,000
Purchase of shares under the stock repurchase program													68,613,000	37,859,000	0
Purchase of shares under the stock repurchase program (in shares)													1,897,002	1,461,225	0
Stock-based compensation					5,453,000	4,796,000	4,157,000
Balance-end of period	$ 375,000	$ 371,000	$ 364,000	$ 363,000	$ 127,779,000	$ 114,568,000	$ 98,107,000	$ 92,153,000	$ 349,012,000	$ 289,952,000	$ 243,552,000	$ 211,003,000	$ (273,416,000)	$ (204,803,000)	$ (166,944,000)	$ (166,944,000)
Balance-end of period (in shares)	37,498,128	37,130,646	36,436,503	36,304,735									11,120,040	9,223,038	7,761,813	7,761,813