NET INCOME PER COMMON SHARE (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Jan. 29, 2012	Jan. 30, 2011	Jan. 31, 2010
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Net income	$ 317,881	$ 53,805	$ 161,910
Common stock dividends paid to holders of Series A convertible preferred stock	(628)	(471)	0
Allocation of income to Series A convertible preferred stock	(18,034)	(2,071)	0
Net income available to common stockholders for basic net income per common share	$ 299,219	$ 51,263	$ 161,910
Weighted average common shares outstanding for basic net income per common share	67,158	62,744	51,639
Weighted average impact of dilutive securities	1,576	1,455	813
Weighted average impact of dilutive warrant	0	72	54
Weighted average impact of assumed convertible preferred stock conversion	4,189	3,107	0
Total shares for diluted net income per common share	72,923	67,378	52,506
Basic net income per common share (in dollars per share)	$ 4.46	$ 0.82	$ 3.14
Diluted net income per common share (in dollars per share)	$ 4.36	$ 0.80	$ 3.08
Weighted average antidilutive securities	345	287	1,578