Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Revenue:
Total revenue	$ 2,151,369	$ 1,646,186	$ 1,129,167
Cost of revenue:
Total cost of revenue	777,992	584,417	406,051
Gross profit	1,373,377	1,061,769	723,116
Operating expenses:
Research and development	442,468	349,594	273,581
Sales and marketing	187,142	155,105	130,887
General and administrative	65,420	86,798	75,239
Legal settlement (Note 14)	405,000	0	0
Total operating expenses	1,100,030	591,497	479,707
Income from operations	273,347	470,272	243,409
Other income (expense), net:
Interest expense	(2,701)	(2,780)	(3,136)
Other income (expense), net	18,155	7,268	1,952
Total other income (expense), net	15,454	4,488	(1,184)
Income before income taxes	288,801	474,760	242,225
Provision for (benefit from) income taxes	(39,314)	51,559	58,036
Net income	328,115	423,201	184,189
Net income attributable to common stockholders:
Basic	327,926	422,400	182,965
Diluted	$ 327,941	$ 422,468	$ 183,039
Net income per share attributable to common stockholders:
Basic (in dollars per share)	$ 4.39	$ 5.85	$ 2.66
Diluted (in dollars per share)	$ 4.06	$ 5.35	$ 2.50
Weighted-average shares used in computing net income per share attributable to common stockholders:
Basic (in shares)	74,750	72,258	68,771
Diluted (in shares)	80,844	78,977	73,222
Product
Revenue:
Total revenue	$ 1,841,100	$ 1,432,810	$ 991,337
Cost of revenue:
Total cost of revenue	720,584	538,035	369,768
Service
Revenue:
Total revenue	310,269	213,376	137,830
Cost of revenue:
Total cost of revenue	$ 57,408	$ 46,382	$ 36,283