Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Revenue:
Total revenue	$ 238,460	$ 225,914	$ 693,082	$ 654,066
Cost of revenue:
Total cost of revenue	84,406	79,220	246,984	228,181
Total gross profit	154,054	146,694	446,098	425,885
Operating expenses:
Research and development	61,662	68,857	189,762	203,790
Sales and marketing	93,961	98,355	284,202	303,745
General and administrative	23,096	27,717	75,806	83,019
Restructuring charges	1,488	6,481	25,020	10,280
Total operating expenses	180,207	201,410	574,790	600,834
Operating loss	(26,153)	(54,716)	(128,692)	(174,949)
Interest income	2,164	5,275	9,450	17,260
Interest expense	(14,353)	(15,554)	(45,555)	(46,224)
Other income (expense), net	157	40	(951)	(1,018)
Loss before income taxes	(38,185)	(64,955)	(165,748)	(204,931)
Provision for income taxes	933	540	2,952	3,262
Net loss	$ (39,118)	$ (65,495)	$ (168,700)	$ (208,193)
Net loss per share, basic and diluted (in usd per share)	$ (0.17)	$ (0.31)	$ (0.76)	$ (1.02)
Weighted average shares used in computing net loss per share, basic and diluted (in shares)	224,807	212,207	221,329	204,855
Product, subscription and support
Revenue:
Total revenue	$ 183,836	$ 179,823	$ 535,224	$ 523,828
Cost of revenue:
Total cost of revenue	54,933	54,272	162,095	155,938
Professional services
Revenue:
Total revenue	54,624	46,091	157,858	130,238
Cost of revenue:
Total cost of revenue	$ 29,473	$ 24,948	$ 84,889	$ 72,243