Basis of Presentation Significant Accounting Policies and Recently Adopted Accounting Pronouncements and New Accounting Pronouncements Not Yet Adopted (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jul. 28, 2012 Store	Jul. 30, 2011 Store	Jul. 28, 2012 Store	Jul. 30, 2011 Store
Summary of long-lived assets
Aggregate carrying value of all long-lived assets impaired	$ 9,660	$ 1,057	$ 13,266	$ 1,316
Less: Impairment charges	(8,973)	(1,057)	(12,579)	(1,316)
Aggregate fair value of all long-lived assets impaired	$ 687		$ 687
Number of stores with asset impairment	41	4	51	6