CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Share-based compensation expense	$ 17,695	$ 10,229
Cost of Revenue
Share-based compensation expense	1,633	891
Research and Development
Share-based compensation expense	6,627	4,064
Sales and Marketing
Share-based compensation expense	5,439	2,432
General and Administrative
Share-based compensation expense	$ 3,996	$ 2,842