Stockholders' Equity (Details) - USD ($) $ in Millions	3 Months Ended
Stockholders' Equity (Details) - USD ($) $ in Millions	Mar. 31, 2021	Mar. 31, 2020	Nov. 30, 2019
Class of Stock [Line Items]
Stock repurchase program, authorized amount			$ 5.0
Economic interest percentage	38.20%
Non-controlling interest holders
Class of Stock [Line Items]
Economic interest percentage	61.80%
Class B Common Stock
Class of Stock [Line Items]
Antidilutive securities (in shares)	2,443,437	5,869,778
Class C Common Stock
Class of Stock [Line Items]
Antidilutive securities (in shares)	72,064,218	77,791,218
Stock Options
Class of Stock [Line Items]
Antidilutive securities (in shares)	1,521,137	745,784