Impairment of Long-Lived Assets - Details of Long Lived Assets Tested and Impaired (Detail) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Oct. 27, 2012 Store	Oct. 29, 2011 Store
Impaired Long-Lived Assets Held and Used [Line Items]
Carrying value of assets tested for impairment	$ 6,726	$ 24,845
Carrying value of assets with impairment	1,023	8,939
Aggregate fair value of all long-lived assets tested	$ 490	$ 1,894
Number of stores tested for impairment	101	221
Number of stores with impairment	17	64