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	$ 540,570	$ 608,321	$ 1,063,599	$ 1,203,745
Cost of revenue:
Total cost of revenue	196,481	218,130	381,259	432,984
Gross profit	344,089	390,191	682,340	770,761
Operating expenses:
Research and development	111,544	114,295	224,698	233,964
Sales and marketing	51,237	53,040	108,323	104,093
General and administrative	14,319	16,019	32,668	31,525
Total operating expenses	177,100	183,354	365,689	369,582
Income from operations	166,989	206,837	316,651	401,179
Other income, net	8,256	13,811	20,413	26,144
Income before income taxes	175,245	220,648	337,064	427,323
Provision for income taxes	30,452	31,397	53,840	37,043
Net income	144,793	189,251	283,224	390,280
Net income attributable to common stockholders:
Basic	144,793	189,152	283,224	390,063
Diluted	$ 144,793	$ 189,158	$ 283,224	$ 390,076
Net income per share attributable to common stockholders:
Basic (in dollars per share)	$ 1.91	$ 2.47	$ 3.72	$ 5.12
Diluted (in dollars per share)	$ 1.83	$ 2.33	$ 3.56	$ 4.80
Weighted-average shares used in computing net income per share attributable to common stockholders:
Basic (in shares)	75,808	76,552	76,036	76,238
Diluted (in shares)	79,298	81,335	79,620	81,271
Product
Revenue:
Total revenue	$ 421,413	$ 513,171	$ 832,319	$ 1,018,586
Cost of revenue:
Total cost of revenue	176,432	200,534	340,061	398,686
Service
Revenue:
Total revenue	119,157	95,150	231,280	185,159
Cost of revenue:
Total cost of revenue	$ 20,049	$ 17,596	$ 41,198	$ 34,298