Condensed Consolidated Income Statements (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Apr. 01, 2017	Apr. 02, 2016
Revenue:
Product and maintenance	$ 451,407	$ 411,744
Services	25,504	36,118
Total revenue	476,911	447,862
Costs and Expenses:
Cost of product and maintenance	43,717	44,181
Cost of services	18,075	17,873
Marketing and sales	103,347	99,200
Research and development	198,286	179,906
General and administrative	31,816	28,300
Amortization of acquired intangibles	3,856	5,780
Restructuring and other charges (credits)	(1,788)	14,586
Total costs and expenses	397,309	389,826
Income from operations	79,602	58,036
Interest expense	(6,479)	(5,357)
Other income, net	1,059	4,763
Income before provision for income taxes	74,182	57,442
Provision for income taxes	5,923	6,880
Net income	$ 68,259	$ 50,562
Net income per share - basic (in usd per share)	$ 0.25	$ 0.17
Net income per share - diluted (in usd per share)	$ 0.25	$ 0.17
Weighted average common shares outstanding - basic (in shares)	270,173	296,615
Weighted average common shares outstanding - diluted (in shares)	277,736	303,434