Summary of Non-Financial Assets Measured at Fair Value on Non-Recurring Basis (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Oct. 29, 2011	Oct. 30, 2010	Oct. 29, 2011	Oct. 30, 2010
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Adjusted Fair Value, Long-lived assets held and used	$ 1,076	$ 1,371	$ 1,076	$ 1,371
Adjusted Fair Value, Total	1,076	1,371	1,076	1,371
Impairment of store assets	2,067	545	3,284	551
Impairment of Store Assets, Total	2,067	545	3,284	551
Adjusted Fair Value for 9 months, Long-lived assets held and used	2,175		2,175
Adjusted Fair Value for 9 months, Total	2,175		2,175
Fair Value, Measurements, Nonrecurring | Fair Value, Inputs, Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Adjusted Fair Value, Long-lived assets held and used	1,076	1,371	1,076	1,371
Adjusted Fair Value, Total	1,076	1,371	1,076	1,371
Adjusted Fair Value for 9 months, Long-lived assets held and used	2,175		2,175
Adjusted Fair Value for 9 months, Total	$ 2,175		$ 2,175