Condensed Consolidated Statements of Operations (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 30, 2012	Apr. 01, 2011
Condensed Consolidated Statements of Operations [Abstract]
Product revenue	$ 110,367	$ 115,867
Service revenue	17,354	16,968
Net revenue	127,721	132,835
Product cost of revenue	66,936	64,751
Service cost of revenue	7,123	6,229
Total cost of revenue	74,059	70,980
Gross profit	53,662	61,855
Operating expenses:
Research and development	27,829	26,149
Selling, general and administrative	32,311	33,564
Amortization of intangibles	2,179	2,229
Total operating expenses	62,319	61,942
Loss from operations	(8,657)	(87)
Interest income, net	119	92
Other income (expense), net	403	(107)
Loss before income taxes	(8,135)	(102)
Benefit from income taxes	(607)	(618)
Net income (loss)	$ (7,528)	$ 516
Net income (loss) per share:
Basic	$ (0.06)	$ 0.00
Diluted	$ (0.06)	$ 0.00
Weighted average shares:
Basic	117,275	113,836
Diluted	117,275	116,109