Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Revenue:
Total revenue	$ 503,332	$ 345,293	$ 1,358,787	$ 917,196
Costs and expenses:
Cost of revenue	235,940	133,859	561,350	382,374
Research and development	165,947	137,487	591,744	401,461
Sales and marketing	186,999	120,836	444,822	336,376
General and administrative	36,081	26,774	103,479	73,517
Total costs and expenses	624,967	418,956	1,701,395	1,193,728
Income (loss) from operations	(121,635)	(73,663)	(342,608)	(276,532)
Interest income	1,029	6,597	10,152	7,929
Interest expense	(7,322)	(6,728)	(21,238)	(10,158)
Other income (expense), net	(3,051)	313,757	(4,810)	321,009
Income (loss) before income taxes	(130,979)	239,963	(358,504)	42,248
Provision for (benefit from) income taxes	(8,773)	9,880	17,927	(3,177)
Net income (loss)	$ (122,206)	$ 230,083	$ (376,431)	$ 45,425
Net income (loss) per share attributable to common stockholders:
Basic	$ (0.11)	$ 0.24	$ (0.38)	$ 0.05
Diluted	$ (0.11)	$ 0.24	$ (0.38)	$ 0.05
Weighted-average common shares used to compute net income (loss) per share attributable to common stockholders:
Basic	1,076,680	943,350	995,642	935,701
Diluted	1,076,680	973,830	995,642	970,801
Online Game [Member]
Revenue:
Total revenue	$ 436,011	$ 281,651	$ 1,168,552	$ 722,523
Advertising and Other [Member]
Revenue:
Total revenue	$ 67,321	$ 63,642	$ 190,235	$ 194,673