Income Taxes - Summary of Deferred Tax Assets and Liabilities (Detail) (USD $) In Thousands, unless otherwise specified	Feb. 02, 2013	Jan. 28, 2012
Schedule Of Deferred Tax Assets And Liabilities [Line Items]
Current net deferred tax asset	$ 5,238	$ 3,782
Noncurrent net deferred tax asset	122,827	104,629
Net deferred taxes before valuation allowance	128,065	108,411
Valuation allowance	(123,920)	(103,777)
Total net deferred tax asset	4,145	4,634
Deferred tax assets:
Net operating loss and tax credit carryforwards	113,264	97,206
Deferred lease incentives	6,047	7,395
Deferred rent	6,506	6,442
Deferred and stock-based compensation	4,516	3,795
Inventory cost capitalization	2,635	2,536
Sublease loss reserves		114
Other	4,931	3,470
Total deferred tax assets	137,899	120,958
Deferred tax liabilities:
Depreciation and amortization	(6,165)	(8,762)
Prepaid expenses	(2,219)	(2,164)
State income taxes	(1,450)	(1,621)
Total deferred tax liabilities	(9,834)	(12,547)
Net deferred taxes before valuation allowance	128,065	108,411
Less: valuation allowance	(123,920)	(103,777)
Total net deferred tax asset	$ 4,145	$ 4,634