Earnings Per Share (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Apr. 28, 2012	Apr. 30, 2011
Earnings Per Share [Abstract]
Net income	$ 53,645	$ 45,918
Net income and dividends allocated to unvested restricted stock	(933)	(537)
Net income available to common shareholders	$ 52,712	$ 45,381
Weighted average common shares outstanding-basic	163,973,850	174,881,470
Dilutive effect of outstanding awards	902,397	1,230,938
Weighted average common and common equivalent shares outstanding - diluted	164,876,247	176,112,408
Net income per common share-Basic	$ 0.32	$ 0.26
Net income per common share-Diluted	$ 0.32	$ 0.26
Anti-dilutive securities excluded from computation of diluted EPS, in shares	1,619,363	3,905,031