Condensed Consolidated Statements of Operations (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Revenues:
Product revenues	$ 233,687	$ 231,509
Service revenues	97,013	97,015
Total revenues	330,700	328,524
Cost of revenues:
Cost of product revenues	101,269	97,636
Cost of service revenues	36,611	38,903
Total cost of revenues	137,880	136,539
Gross profit	192,820	191,985
Operating expenses:
Sales and marketing	90,859	93,968
Research and development	49,337	48,147
General and administrative	21,167	23,793
Amortization of purchased intangibles	2,417	2,492
Restructuring costs	24	30,343
Transaction-related costs		156
Total operating expenses	163,804	198,899
Operating income (loss)	29,016	(6,914)
Interest and other income (expense), net:
Interest expense	(1,484)	(1,474)
Other income (expense), net	22	779
Interest and other income (expense), net	(1,462)	(695)
Income (loss) before provision for (benefit from) income taxes	27,554	(7,609)
Provision for (benefit from) income taxes	6,356	(3,618)
Net income (loss)	$ 21,198	$ (3,991)
Basic net income (loss) per share:	$ 0.16	$ (0.03)
Diluted net income (loss) per share:	$ 0.15	$ (0.03)
Number of shares used in computation of net income (loss) per share:
Basic	134,777	136,795
Diluted	139,233	136,795