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
Revenues
Total revenues	$ 303,624	$ 233,352	$ 849,121	$ 649,993
Cost of revenues
Total cost of revenues	82,314	59,705	232,395	164,170
Gross profit	221,310	173,647	616,726	485,823
Operating expenses
Research and development	48,481	35,286	132,910	97,705
Sales and marketing	152,986	109,882	421,931	313,023
General and administrative	49,513	39,142	146,381	100,401
Total operating expenses	250,980	184,310	701,222	511,129
Loss from operations	(29,670)	(10,663)	(84,496)	(25,306)
Other income (expense), net
Interest expense	(12,680)	(5,160)	(32,780)	(15,280)
Other income, net	21,824	2,926	36,910	9,118
Other income (expense), net	9,144	(2,234)	4,130	(6,162)
Loss before income taxes	(20,526)	(12,897)	(80,366)	(31,468)
Provision for (benefit from) income taxes	431	(148)	803	(3,118)
Net loss	$ (20,957)	$ (12,749)	$ (81,169)	$ (28,350)
Net loss per common share
Basic and diluted (in dollars per share)	$ (0.24)	$ (0.15)	$ (0.92)	$ (0.34)
Weighted-average number of shares used in computing net loss per share
Basic and diluted (in shares)	89,173	83,283	88,259	82,348
Subscriptions
Revenues
Total revenues	$ 279,639	$ 210,906	$ 779,781	$ 588,406
Cost of revenues
Total cost of revenues	60,531	40,930	169,685	114,343
Other
Revenues
Total revenues	23,985	22,446	69,340	61,587
Cost of revenues
Total cost of revenues	$ 21,783	$ 18,775	$ 62,710	$ 49,827