Income Taxes - Components of Deferred Tax Assets and Liabilities (Detail) (USD $) In Thousands, unless otherwise specified	Oct. 28, 2012	Jul. 29, 2012	Apr. 29, 2012	Jan. 29, 2012	Oct. 30, 2011	Jul. 31, 2011	May 01, 2011	Jan. 30, 2011
Deferred tax assets:
Net operating loss carryforwards	$ 35,163				$ 22,488
U.S. federal tax credit carryforwards	20,018				15,781
Purchased intangible assets	15,683				16,274
Deferred income	13,809				23,073
Compensation accruals	7,949				7,791
Accelerated tax depreciation and amortization	1,538				369
Other accruals, reserves and allowances	519				1,686
Other, net	5,585				8,279
Total deferred tax assets	100,264				95,741
Less valuation allowance	(82,952)				(76,374)
Deferred tax assets, net	17,312				19,367
Deferred tax liabilities:
Unremitted earnings from foreign subsidiaries	8,974				8,833
Software development costs	891				718
Other, net	5,139				5,681
Total deferred tax liabilities	15,004				15,232
Net deferred tax asset	2,308				4,135
Balance sheet classification
Current assets	1,321				3,382
Non-current assets	6,019	6,458	6,462	6,459	6,461	9,492	9,494	9,485
Current liabilities	(2,273)				(2,216)
Non-current liabilities	(2,759)	(3,531)	(3,493)	(3,494)	(3,492)	(13,629)	(13,628)	(13,633)
Net deferred tax asset	$ 2,308				$ 4,135