Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Revenues:
Product revenues	$ 203,260	$ 233,687
Service revenues	86,815	97,013
Total revenues	290,075	330,700
Cost of revenues:
Cost of product revenues	95,055	101,269
Cost of service revenues	31,191	36,611
Total cost of revenues	126,246	137,880
Gross profit	163,829	192,820
Operating expenses:
Sales and marketing	79,463	90,859
Research and development	43,070	49,337
General and administrative	20,110	21,167
Amortization of purchased intangibles	2,200	2,417
Restructuring costs	7,502	24
Transaction-related costs	4,244
Total operating expenses	156,589	163,804
Operating income	7,240	29,016
Interest and other income (expense), net:
Interest expense	(1,637)	(1,484)
Other income (expense), net	869	22
Interest and other income (expense), net	(768)	(1,462)
Income before provision for income taxes	6,472	27,554
Provision for income taxes	3,137	6,356
Net income	$ 3,335	$ 21,198
Basic net income per share	$ 0.02	$ 0.16
Diluted net income per share	$ 0.02	$ 0.15
Number of shares used in computation of net income per share:
Basic	134,168	134,777
Diluted	137,292	139,233