Debt (7.5% Convertible Notes) (Details) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Feb. 02, 2013	Jan. 28, 2012	Jan. 29, 2011
Debt Instrument [Line Items]
Principal amount outstanding of the convertible notes	$ 373,871
Loss on extinguishment of debt	(3,530)	(539)	(4)
Convertible Notes 7.50%, Maturing Fiscal Year 2013 [Member]
Debt Instrument [Line Items]
Principal amount upon issuance of the convertible notes	120,000
Debt interest rate	7.50%	7.50%	7.50%
Debt issuance date	May 2009
Debt maturity date	2013
Debt conversion rate	180.5869
Debt conversion price	$ 5.54
Common stock to be issued upon conversion, shares	21,670,000
Non-convertible borrowing rate	13.00%
Fair value of liability component, upon issuance	97,994
Carrying amount of the equity component, upon issuance	22,006
Debt discount amortization period, years	4 years 6 months
Debt conversion, principal amount converted	28,796
Debt conversion, shares issued	5,200,000
Loss on extinguishment of debt	(3,530)
Remaining debt discount amortization period	0 years 10 months
Excess of if-converted value over principal amount	$ 85,519