Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Revenue:
Total revenue	$ 229,900	$ 217,608	$ 454,622	$ 428,152
Cost of revenue:
Total cost of revenue	80,993	77,393	162,579	148,961
Total gross profit	148,907	140,215	292,043	279,191
Operating expenses:
Research and development	60,596	67,538	128,099	134,933
Sales and marketing	90,042	101,494	190,242	205,390
General and administrative	25,281	27,926	52,710	55,302
Restructuring charges	12,558	0	23,532	3,799
Total operating expenses	188,477	196,958	394,583	399,424
Operating loss	(39,570)	(56,743)	(102,540)	(120,233)
Interest income	2,863	6,137	7,287	11,985
Interest expense	(15,356)	(15,407)	(31,202)	(30,670)
Other expense, net	(119)	(770)	(1,108)	(1,058)
Loss before income taxes	(52,182)	(66,783)	(127,563)	(139,976)
Provision for income taxes	1,094	540	2,019	2,722
Net loss	$ (53,276)	$ (67,323)	$ (129,582)	$ (142,698)
Net loss per share, basic and diluted (in usd per share)	$ (0.24)	$ (0.33)	$ (0.59)	$ (0.71)
Weighted average shares used in computing net loss per share, basic and diluted (in shares)	221,352	204,109	219,570	201,001
Product, subscription and support
Revenue:
Total revenue	$ 177,305	$ 174,102	$ 351,388	$ 344,005
Cost of revenue:
Total cost of revenue	54,026	53,198	107,162	101,666
Professional services
Revenue:
Total revenue	52,595	43,506	103,234	84,147
Cost of revenue:
Total cost of revenue	$ 26,967	$ 24,195	$ 55,417	$ 47,295