Condensed Consolidated Statements of Income (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Apr. 01, 2012	Apr. 03, 2011
Revenue:
Product revenue	$ 255,636	$ 266,717
Service and other revenue	17,134	15,798
Total revenue	272,770	282,515
Cost of revenue:
Cost of product revenue	80,151	85,437
Cost of service and other revenue	8,565	6,052
Amortization of acquired intangible assets	3,043	2,985
Total cost of revenue	91,759	94,474
Gross profit	181,011	188,041
Operating expense:
Research and development	48,839	50,200
Selling, general and administrative	67,969	65,661
Unsolicited tender offer related expense	8,092	0
Restructuring charges	2,622	0
Headquarter relocation expense	2,140	2,522
Acquisition related expense	1,737	270
Total operating expense	131,399	118,653
Income from operations	49,612	69,388
Other income (expense):
Interest income	2,526	1,540
Interest expense	(9,202)	(7,390)
Other expense, net	(2,663)	(27,530)
Total other expense, net	(9,339)	(33,380)
Income before income taxes	40,273	36,008
Provision for income taxes	14,071	11,871
Net income	$ 26,202	$ 24,137
Net income per basic share (in dollars per share)	$ 0.21	$ 0.19
Net income per diluted share (in dollars per share)	$ 0.20	$ 0.16
Shares used in calculating basic net income per share (in shares)	122,642	126,517
Shares used in calculating diluted net income per share (in shares)	133,859	153,129