Net Income (Loss) Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Numerator:
Net income (loss) attributable to common stockholders	$ (8,074)	$ 80,045
Denominator:
Weighted average common shares outstanding, basic	56,946,714	56,302,967
Effect of dilutive securities		1,706,911
Weighted average common shares outstanding, diluted	56,946,714	58,009,878
Basic net income (loss) (in dollars per share)	$ (0.14)	$ 1.42
Diluted net income (loss) (in dollars per share)	$ (0.14)	$ 1.38
Dilutive effect of employee stock options and ESPP		1,706,911