Condensed Consolidated Income Statements (Unaudited) (USD $) In Thousands, except Per Share data	3 Months Ended		9 Months Ended
	Oct. 01, 2011	Oct. 02, 2010	Oct. 01, 2011	Oct. 02, 2010
Revenue:
Product	$ 163,966	$ 118,221	$ 463,723	$ 338,053
Services	29,102	23,945	86,384	75,123
Maintenance	99,389	95,768	291,722	273,760
Total revenue	292,457	237,934	841,829	686,936
Costs and Expenses:
Cost of product	18,185	10,757	52,453	23,172
Cost of services	20,410	19,102	61,101	62,583
Cost of maintenance	11,223	9,960	32,837	31,839
Marketing and sales	79,914	76,065	235,292	222,340
Research and development	103,154	97,275	303,721	278,585
General and administrative	24,041	25,081	68,720	64,973
Amortization of acquired intangibles	3,786	4,459	12,750	9,701
Restructuring and other charges (credits)	(433)	(1,682)	277	(3,073)
Total costs and expenses	260,280	241,017	767,151	690,120
Income (loss) from operations	32,177	(3,083)	74,678	(3,184)
Interest expense	(10,830)	(10,476)	(32,584)	(25,879)
Other income (expense), net	7,244	(2,907)	20,107	(33)
Income (loss) before provision (benefit) for income taxes	28,591	(16,466)	62,201	(29,096)
Provision (benefit) for income taxes	485	(143,219)	864	(192,671)
Net income	$ 28,106	$ 126,753	$ 61,337	$ 163,575
Basic net income per share	$ 0.11	$ 0.49	$ 0.23	$ 0.63
Diluted net income per share	$ 0.10	$ 0.48	$ 0.23	$ 0.62
Weighted average common shares outstanding - basic	264,723	258,606	263,149	261,122
Weighted average common shares outstanding - diluted	270,741	263,302	270,068	265,383