CONSOLIDATED STATEMENTS OF OPERATIONS (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Stock-based compensation	$ 48,263	$ 63,656	$ 197,602	$ 134,036
Cost of revenue
Stock-based compensation	3,476	1,112	8,768	3,586
Selling and marketing
Stock-based compensation	4,876	10,558	37,372	23,890
Technology and content
Stock-based compensation	11,556	7,062	50,997	19,405
General and administrative
Stock-based compensation	27,308	15,694	87,775	57,925
Restructuring and related reorganization charges
Stock-based compensation	$ 1,047	$ 29,230	$ 12,690	$ 29,230