Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Revenue:
Total revenue	$ 265,403	$ 208,232
Costs and expenses:
Cost of revenue	121,643	69,042
Research and development	161,880	60,825
Sales and marketing	102,011	50,855
General and administrative	21,504	23,253
Total costs and expenses	407,038	203,975
Income (loss) from operations	(141,635)	4,257
Interest income	443	1,810
Other income (expense), net	2,112	3,401
Income (loss) before income taxes	(139,080)	9,468
Provision for (benefit from) income taxes	(10,252)	3,859
Net income (loss)	$ (128,828)	$ 5,609
Net income (loss) per share attributable to common stockholders:
Basic	$ (0.14)	$ 0.01
Diluted	$ (0.14)	$ 0.01
Weighted-average common shares used to compute net income (loss) per share attributable to common stockholders:
Basic	926,230	869,627
Diluted	926,230	893,774
Online Game [Member]
Revenue:
Total revenue	$ 200,164	$ 161,553
Advertising and Other [Member]
Revenue:
Total revenue	$ 65,239	$ 46,679