Net Income (Loss) Per Share (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Oct. 29, 2011	Jul. 30, 2011	Apr. 30, 2011	Jan. 29, 2011	Oct. 30, 2010	Jul. 31, 2010	May 01, 2010	Jan. 30, 2010	Oct. 29, 2011		Oct. 30, 2010		Oct. 31, 2009
Net Income (Loss) Per Share [Line Items]
Net income (loss)	$ (4,324)	$ 1,937	$ 26,079	$ 26,918	$ 22,227	$ 22,530	$ 22,095	$ 49,671	$ 50,610		$ 116,523		$ (83,189)	[1]
Weighted-average shares used in computing basic net income per share	474,975	483,744	473,209	465,108	456,597	449,489	442,816	439,080	474,259		446,996		398,948	[1]
Basic net income (loss) per share	$ (0.01)	$ 0.00	$ 0.06	$ 0.06	$ 0.05	$ 0.05	$ 0.05	$ 0.11	$ 0.11		$ 0.26		$ (0.21)	[1]
Weighted-average shares used in computing diluted net income per share	474,975	509,548	501,511	491,166	485,672	481,863	479,166	484,262	497,030		482,741		398,948	[1]
Diluted net income (loss) per share	$ (0.01)	$ 0.00	$ 0.05	$ 0.05	$ 0.05	$ 0.05	$ 0.05	$ 0.10	$ 0.10		$ 0.24		$ (0.21)	[1]
Stock Options [Member]
Net Income (Loss) Per Share [Line Items]
Dilutive potential common shares									13,654		22,083
Antidilutive potential common shares									21,905	[2]	21,217	[2]	68,710	[1],[2]
Other Share Based Awards [Member]
Net Income (Loss) Per Share [Line Items]
Dilutive potential common shares									9,117		13,662
Antidilutive potential common shares									3,075	[2]	700	[2]	17,035	[1],[2]
Convertible Subordinated Debt [Member]
Net Income (Loss) Per Share [Line Items]
Antidilutive potential common shares											3,552	[2]	12,083	[1],[2]

[1] As the Company was in a net loss position for the year ended October 31, 2009, there was no dilutive impact of potential common shares associated with stock options and other share based awards, by application of the treasury stock method.

[2] These amounts are excluded from the computation of diluted net income (loss) per share.