Condensed Consolidated Income Statements (Unaudited) (USD $) In Thousands, except Per Share data	3 Months Ended		6 Months Ended
	Jul. 02, 2011	Jul. 03, 2010	Jul. 02, 2011	Jul. 03, 2010
Revenue:
Product	$ 157,938	$ 117,066	$ 299,757	$ 219,832
Services	29,477	25,258	57,282	51,178
Maintenance	95,855	84,740	192,333	177,992
Total revenue	283,270	227,064	549,372	449,002
Costs and Expenses:
Cost of product	20,074	7,123	34,268	12,415
Cost of services	20,616	21,556	40,691	43,481
Cost of maintenance	10,716	10,481	21,614	21,879
Marketing and sales	77,006	71,513	155,378	146,275
Research and development	99,268	91,880	200,567	181,310
General and administrative	25,377	17,058	44,679	39,892
Amortization of acquired intangibles	4,505	2,551	8,964	5,242
Restructuring and other charges (credits)	751	(317)	710	(1,391)
Total costs and expenses	258,313	221,845	506,871	449,103
Income (loss) from operations	24,957	5,219	42,501	(101)
Interest expense	(10,768)	(7,972)	(21,754)	(15,403)
Other income (expense), net	8,394	(3,100)	12,863	2,874
Income (loss) before provision (benefit) for income taxes	22,583	(5,853)	33,610	(12,630)
Provision (benefit) for income taxes	(4,325)	(54,460)	379	(49,452)
Net income	$ 26,908	$ 48,607	$ 33,231	$ 36,822
Basic net income per share	$ 0.10	$ 0.19	$ 0.13	$ 0.14
Diluted net income per share	$ 0.10	$ 0.18	$ 0.12	$ 0.14
Weighted average common shares outstanding - basic	263,191	262,163	262,362	262,380
Weighted average common shares outstanding - diluted	270,885	266,423	269,732	266,539