Consolidated Statements Of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 29, 2012		Dec. 31, 2011		Dec. 26, 2010
Consolidated Statements Of Operations [Abstract]
Net revenues	$ 530,997	[1]	$ 654,304	[1]	$ 635,082	[1]
Cost of revenues	157,918	[1]	211,630	[1]	204,518	[1]
Gross profit	373,079	[1]	442,674	[1]	430,564	[1]
Other costs and expenses:
Research and development	220,927	[1]	227,106	[1]	187,467	[1]
Selling, general and administrative	112,479	[1]	118,601	[1]	104,117	[1]
Amortization of purchased intangible assets	45,321	[1]	44,182	[1]	29,932	[1]
Impairment of goodwill and purchased intangible assets	274,637	[1]			4,882	[1]
Restructuring costs and other charges					403	[1]
(Loss) income from operations	(280,285)	[1]	52,785	[1]	108,645	[1]
Other (expense) income:
Revaluation of liability for contingent consideration			29,376	[1]
Gain on investment securities and other	1,523	[1]	845	[1]	3,978	[1]
Amortization of debt issue costs	(167)	[1]	(200)	[1]	(200)	[1]
Foreign exchange (loss) gain	(1,512)	[1]	344	[1]	(2,360)	[1]
Interest expense, net	(1,586)	[1]	(2,267)	[1]	(1,248)	[1]
Gain on investment in Wintegra, Inc					4,509	[1]
(Loss) income before (provision for) recovery of income taxes	(282,027)	[1]	80,883	[1]	113,324	[1]
Provision for income taxes	(45,991)	[1]	(9,897)	[1]	(37,064)	[1]
Net (loss) income	$ (328,018)	[1]	$ 70,986	[1]	$ 76,260	[1]
Net (loss) income per common share - basic	$ (1.51)	[1]	$ 0.30	[1]	$ 0.33	[1]
Net (loss) income per common share - diluted	$ (1.51)	[1]	$ 0.30	[1]	$ 0.32	[1]
Shares used in per share calculation - basic	216,593	[1]	233,210	[1]	231,427	[1]
Shares used in per share calculation - diluted	216,593	[1]	235,184	[1]	234,787	[1]

[1] As Restated