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NET INCOME (LOSS) PER COMMON SHARE - DILUTED (Details) (USD $)
In Thousands
3 Months Ended 6 Months Ended
Jul. 31, 2011
Aug. 01, 2010
Jul. 31, 2011
Aug. 01, 2010
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]        
Number Of Dilutive Shares Issued Upon Vesting     657 700
Net income (loss) available to common stockholders for basic net income (loss) per common share (add back section) $ 62,809 $ (70,781) $ 117,074 $ (98,394)
Common stock dividends paid to holders of Series A convertible preferred stock 0 0 314 0
Allocation of income to Series A convertible preferred stock 3,920 0 7,008 0
Net income (loss) available to common stockholders for diluted net income (loss) per common share $ 66,729 $ (70,781) $ 124,396 $ (98,394)