Condensed Consolidated Income Statements (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Apr. 02, 2011
Revenue:
Product	$ 190,024	$ 141,819
Services	29,542	27,805
Maintenance	96,264	96,478
Total revenue	315,830	266,102
Costs and Expenses:
Cost of product	15,401	14,194
Cost of services	19,374	20,075
Cost of maintenance	11,811	10,898
Marketing and sales	83,795	78,372
Research and development	108,594	101,299
General and administrative	27,770	19,302
Amortization of acquired intangibles	3,786	4,459
Restructuring and other charges (credits)	(51)	(41)
Total costs and expenses	270,480	248,558
Income from operations	45,350	17,544
Interest expense	(8,537)	(10,986)
Other income, net	2,434	4,469
Income before provision for income taxes	39,247	11,027
Provision for income taxes	8,143	4,704
Net income	$ 31,104	$ 6,323
Net income per share - basic	$ 0.12	$ 0.02
Net income per share - diluted	$ 0.11	$ 0.02
Weighted average common shares outstanding - basic	267,940	261,533
Weighted average common shares outstanding - diluted	277,733	268,578