Net Income (Loss) Per Share Attributable to Class A Common Shareholders - Schedule of Calculations of Basic and Diluted Net Income (Loss) Per Share (Parenthetical) (Details) - Class A Common Stock - shares	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Earnings Per Share Basic [Line Items]
Number of shares of common stock to be issued upon exchange of a partnership unit	1
Fully diluted shares of common stock outstanding if all Class A partnership units were to be exchanged for common stock immediately following the reorganization	67,339,974	63,647,961	58,061,255
Restricted Stock and RSUs
Earnings Per Share Basic [Line Items]
Number of antidilutive securities excluded from calculation of diluted income (loss) per share	243	6,137	16