Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Revenue:
Online game	$ 163,745	$ 135,823	$ 317,226	$ 272,880
Advertising and other	45,486	45,912	86,289	95,576
Total revenue	209,231	181,735	403,515	368,456
Costs and expenses:
Cost of revenue	64,172	56,103	129,049	113,242
Research and development	64,615	66,233	133,817	153,970
Sales and marketing	51,201	40,631	97,821	86,975
General and administrative	23,551	25,374	46,116	47,758
Total costs and expenses	203,539	188,341	406,803	401,945
Income (loss) from operations	5,692	(6,606)	(3,288)	(33,489)
Interest income	1,109	761	2,046	1,466
Other income (expense), net	1,614	1,905	3,050	4,005
Income (loss) before income taxes	8,415	(3,940)	1,808	(28,018)
Provision for (benefit from) income taxes	3,322	506	6,189	2,986
Net income (loss)	$ 5,093	$ (4,446)	$ (4,381)	$ (31,004)
Net income (loss) per share attributable to common stockholders:
Basic	$ 0.01	$ (0.01)	$ (0.01)	$ (0.04)
Diluted	$ 0.01	$ (0.01)	$ (0.01)	$ (0.04)
Weighted average common shares used to compute net income (loss) per share attributable to common stockholders:
Basic	863,125	873,393	869,025	872,243
Diluted	887,991	873,393	869,025	872,243