Business Organization And Significant Accounting Policies (Computation Of Basic And Diluted EPS) (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Jan. 28, 2012	Oct. 29, 2011	Jul. 30, 2011	Apr. 30, 2011	Jan. 29, 2011	Oct. 30, 2010	Jul. 31, 2010	May 01, 2010	Jan. 28, 2012	Jan. 29, 2011	Jan. 30, 2010
Business Organization And Significant Accounting Policies [Abstract]
Net income	$ 25,098	$ 26,467	$ 43,391	$ 45,918	$ 20,694	$ 28,844	$ 30,455	$ 35,402	$ 140,874	$ 115,394	$ 69,646
Net income allocated to participating securities									(1,834)	(943)
Net income available to common shareholders									$ 139,040	$ 114,451	$ 69,646
Weighted average common shares outstanding-basic									169,152,870	176,777,953	177,498,862
Dilutive effect of stock options outstanding									1,097,574	1,255,676	1,358,678
Weighted average common and common equivalent shares outstanding - diluted									170,250,444	178,033,629	178,857,540
Net income per common share-Basic									$ 0.82	$ 0.65	$ 0.39
Net income per common share-Diluted									$ 0.82	$ 0.64	$ 0.39