Condensed Consolidated Statements of Comprehensive Income - USD ($) shares in Thousands, $ in Thousands		3 Months Ended
		Mar. 31, 2021	Mar. 31, 2020
Revenues:
Total revenues		$ 1,360,000	$ 1,046,000
Cost of revenues:
Total cost of revenues	[1]	299,000	223,000
Gross profit		1,061,000	823,000
Operating expenses:
Sales and marketing	[1]	524,000	441,000
Research and development	[1]	314,000	227,000
General and administrative	[1]	126,000	106,000
Total operating expenses	[1]	964,000	774,000
Income from operations		97,000	49,000
Interest expense		(7,000)	(9,000)
Other income, net		9,000	8,000
Income before income taxes		99,000	48,000
Provision for income taxes		17,000	0
Net income		$ 82,440	$ 48,231
Net income (loss) per share - basic (in dollars per share)		$ 0.42	$ 0.25
Net income (loss) per share - diluted (in dollars per share)		$ 0.41	$ 0.24
Weighted-average shares used to compute net income (loss) per share - basic (in shares)		196,624	190,163
Weighted-average shares used to compute net income (loss) per share - diluted (in shares)		202,268	199,938
Other comprehensive income:
Foreign currency translation adjustments		$ (31,000)	$ (20,000)
Unrealized losses on investments, net of tax		(7,000)	(20,000)
Other comprehensive income		(38,000)	(40,000)
Comprehensive income		44,000	8,000
Subscription
Revenues:
Total revenues		1,293,000	995,000
Cost of revenues:
Total cost of revenues	[1]	228,000	160,000
Professional services and other
Revenues:
Total revenues		67,000	51,000
Cost of revenues:
Total cost of revenues	[1]	$ 71,000	$ 63,000

[1] Includes stock-based compensation as follows:  Three Months Ended March 31,20212020Cost of revenues:Subscription$29 $22 Professional services and other13 12 Operating expenses:Sales and marketing93 70 Research and development88 59 General and administrative33 26