Schedule II (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jan. 29, 2012		Jan. 30, 2011		Jan. 31, 2010
Valuation and Qualifying Accounts Disclosure [Line Items]
Valuation Allowances and Reserves, Deductions			$ 0
Allowance for Trade Receivables [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Valuation Allowances and Reserves, Balance	789		961		1,062
Valuation Allowances and Reserves, Charged to Cost and Expense	449	[1]	875	[1]	550	[1]
Valuation Allowances and Reserves, Deductions	(265)	[2]	(1,047)	[2]	(651)	[2]
Valuation Allowances and Reserves, Balance	973		789		961
Allowance for Sales Returns [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Valuation Allowances and Reserves, Balance	15,049		15,369		17,336
Valuation Allowances and Reserves, Charged to Cost and Expense	25,331	[3]	26,517	[3]	24,790	[3]
Valuation Allowances and Reserves, Deductions	(26,499)	[4]	(26,837)	[4]	(26,757)	[4]
Valuation Allowances and Reserves, Balance	13,881		15,049		15,369
Valuation Allowance of Deferred Tax Assets [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Valuation Allowances and Reserves, Balance	148,016		113,442		92,541
Valuation Allowances and Reserves, Charged to Cost and Expense	64,269	[5]	34,574	[5]	20,901	[5]
Valuation Allowances and Reserves, Deductions	0				0
Valuation Allowances and Reserves, Balance	$ 212,285		$ 148,016		$ 113,442

[1] Allowances for doubtful accounts are charged to expenses.

[2] Represents uncollectible accounts written off against the allowance for doubtful accounts.

[3] Represents allowance for sales returns estimated at the time revenue is recognized primarily based on historical return rates and is charged as a reduction to revenue.

[4] Represents allowance for sales returns written off.

[5] Represents change in valuation allowance primarily related to state deferred tax assets and acquired tax attributes of Icera that management has determined not likely to be realized due, in part, to projections of future taxable income of the respective jurisdictions.