Condensed Consolidated Income Statements (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 29, 2014	Mar. 30, 2013
Revenue:
Product and maintenance	$ 357,350	$ 328,271
Services	21,200	25,995
Total revenue	378,550	354,266
Costs and Expenses:
Cost of product and maintenance	42,197	29,847
Cost of services	14,902	18,344
Marketing and sales	98,323	90,402
Research and development	146,466	124,084
General and administrative	28,744	29,810
Amortization of acquired intangibles	5,210	3,791
Restructuring and other charges (credits)	396	(148)
Total costs and expenses	336,238	296,130
Income from operations	42,312	58,136
Interest expense	(7,268)	(9,262)
Other income, net	3,382	2,175
Income before provision (benefit) for income taxes	38,426	51,049
Provision (benefit) for income taxes	5,356	(27,560)
Net income	$ 33,070	$ 78,609
Net income per share - basic (in usd per share)	$ 0.12	$ 0.29
Net income per share - diluted (in usd per share)	$ 0.11	$ 0.27
Weighted average common shares outstanding - basic (in shares)	281,615	274,936
Weighted average common shares outstanding - diluted (in shares)	301,034	292,151