Net Income (Loss) Per Share Attributable to Class A Common Shareholders - Schedule of Calculations of Basic and Diluted Net Income (Loss) Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Numerator:
Net income (loss) attributable to holders of shares of Class A common stock—basic	$ (5,732)	$ 29,459	$ 19,398	$ 43,029
Class A Common Stock
Numerator:
Net income (loss) attributable to holders of shares of Class A common stock—basic	(5,732)	29,459	19,398	43,029
Add (deduct) dilutive effect of:
Net income (loss) attributable to holders of shares of Class A common stock—diluted	$ (5,732)	$ 29,459	$ 19,398	$ 43,029
Denominator:
Weighted average shares of Class A common stock outstanding—basic	56,130,614	50,107,269	54,449,690	48,919,127
Add (deduct) dilutive effect of:
Weighted average number of incremental shares issuable from unvested restricted stock, RSUs and stock options, as calculated using the treasury stock method		4,560,818	3,912,810	5,851,725
Weighted average shares of Class A common stock outstanding—diluted	56,130,614	54,668,087	58,362,500	54,770,852
Net income (loss) per share attributable to holders of shares of Class A common stock
Basic (in dollars per share)	$ (0.10)	$ 0.59	$ 0.36	$ 0.88
Diluted (in dollars per share)	$ (0.10)	$ 0.54	$ 0.33	$ 0.79