Condensed Consolidated Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Apr. 02, 2011
Revenues	$ 125,702	$ 119,636
Cost of revenues	50,606	47,478
Gross margin	75,096	72,158
Operating expenses:
Research and development	32,930	35,359
Selling, general and administrative	25,402	31,860
Operating expenses	58,332	67,219
Operating income	16,764	4,939
Other income (expense):
Interest income	497	571
Interest expense	(33)	(5)
Other income (expense), net	(111)	209
Income before income taxes	17,117	5,714
Provision for income taxes	2,797	7,674
Net income (loss)	$ 14,320	$ (1,960)
Earnings (loss) per share:
Basic (in dollars per share)	$ 0.34	$ (0.04)
Diluted (in dollars per share)	$ 0.33	$ (0.04)
Weighted-average common shares outstanding:
Basic (in shares)	42,458	44,269
Diluted (in shares)	43,850	44,269