Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Revenue:
Total revenue	$ 748,697	$ 605,431	$ 2,123,578	$ 1,669,030
Cost of revenue:
Total cost of revenue	270,082	220,469	765,513	601,728
Gross profit	478,615	384,962	1,358,065	1,067,302
Operating expenses:
Research and development	153,093	128,049	428,873	352,747
Sales and marketing	69,740	53,372	211,385	161,695
General and administrative	22,488	15,146	58,856	47,814
Total operating expenses	245,321	196,567	699,114	562,256
Income from operations	233,294	188,395	658,951	505,046
Other income, net	1,346	13,224	4,640	33,637
Income before income taxes	234,640	201,619	663,591	538,683
Provision for income taxes	10,335	33,244	62,032	87,084
Net income	$ 224,305	$ 168,375	$ 601,559	$ 451,599
Net income per share:
Basic (in dollars per share)	$ 2.92	$ 2.22	$ 7.86	$ 5.94
Diluted (in dollars per share)	$ 2.81	$ 2.12	$ 7.54	$ 5.68
Weighted-average shares used in computing net income per share:
Basic (in shares)	76,864	75,999	76,544	76,024
Diluted (in shares)	79,909	79,313	79,744	79,519
Product
Revenue:
Total revenue	$ 604,160	$ 480,242	$ 1,709,772	$ 1,312,561
Cost of revenue:
Total cost of revenue	243,342	199,465	687,554	539,526
Service
Revenue:
Total revenue	144,537	125,189	413,806	356,469
Cost of revenue:
Total cost of revenue	$ 26,740	$ 21,004	$ 77,959	$ 62,202