Capital Structure - Additional Information (Details)	12 Months Ended
	Dec. 31, 2020 class vote shares	Dec. 31, 2019 shares	Dec. 31, 2018 shares
Class of Stock [Line Items]
Number of classes of common stock | class	4
Non-voting common interest units outstanding (in shares) | shares	5,259,713	7,919,952
Number of non-voting common interest units forfeited or repurchased (in shares) | shares	2,660,239	840,803	3,540,312
Class A common stock and Class C common stock
Class of Stock [Line Items]
Number of votes | vote	1
Class B common stock and Class D common stock
Class of Stock [Line Items]
Number of votes | vote	10
Class C common stock and class D common stock | Founder [Member]
Class of Stock [Line Items]
Ownership interest	81.90%