Net Income (Loss) Per Share - Computation of Basic and Diluted Net Loss per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Numerator:
Net income (loss) attributable to common stockholders	$ 32,643	$ 7,540	$ 45,777	$ (10,455)
Less: Net income allocated to participating securities		$ (7,540)
Net Income (loss) available to common stockholders	$ 32,643		$ 45,777	$ (10,455)
Denominator:
Weighted average shares used to compute net income (loss) per share attributable to common stockholders, basic	101,969	26,215	101,621	25,322
Weighted average effect of potentially dilutive shares to purchase common stock	2,799		2,873
Weighted average shares used to compute net income (loss) per share attributable to common stockholders, diluted	104,768	26,215	104,494	25,322
Net income (loss) per share attributable to common stockholders
Basic	$ 0.32		$ 0.45	$ (0.41)
Diluted	$ 0.31		$ 0.44	$ (0.41)