Condensed Consolidated Statements Of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Oct. 04, 2013	Sep. 28, 2012	Oct. 04, 2013	Sep. 28, 2012
Condensed Consolidated Statements Of Operations [Abstract]
Revenue	$ 152,644	$ 151,406	$ 429,202	$ 470,410
Cost of revenue	68,008	69,502	193,740	214,513
Gross margin	84,636	81,904	235,462	255,897
Operating costs and expenses:
Research and development	31,311	38,733	103,059	129,329
Selling, general and administrative	27,083	30,191	86,418	100,805
Amortization of purchased intangibles	6,080	7,105	19,018	21,539
Income from IP agreements		(13,412)		(13,412)
Provision for export compliance	6,000		6,000
Restructuring and related costs	9,067	44	28,694	9,838
Operating income (loss)	5,095	19,243	(7,727)	7,798
Interest expense and fees, net	429	1,900	1,506	5,424
Gain on investments, net	893	654	1,848	881
Income (loss) before income taxes	5,559	17,997	(7,385)	3,255
Income tax expense (benefit)	13,737	16,014	(2,731)	19,084
Net (loss) income	$ (8,178)	$ 1,983	$ (4,654)	$ (15,829)
(Loss) earinings per share
Basic	$ (0.06)	$ 0.02	$ (0.04)	$ (0.12)
Diluted	$ (0.06)	$ 0.02	$ (0.04)	$ (0.12)
Cash dividends declared per common share	$ 0.12	$ 0.12	$ 0.36	$ 0.36
Weighted average common shares outstanding
Basic	127,339	127,540	126,972	127,221
Diluted	127,339	127,562	126,972	127,221