Summary of Non-Financial Assets Measured at Fair Value on Non-Recurring Basis (Detail) (USD $) In Thousands	6 Months Ended
	Jul. 30, 2011	Jul. 31, 2010
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Net Carrying Value, Long-lived assets held and used	$ 495
Net Carrying Value, Total	495
Impairment of store assets	1,217	6
Impairment of Store Assets, Total	1,217	6
Fair Value, Measurements, Nonrecurring | Fair Value, Inputs, Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Net Carrying Value, Long-lived assets held and used	495
Net Carrying Value, Total	$ 495