Stock-Based Compensation Expense and Employee Benefit Plans - Stock Options Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Share-based Arrangements with Employees and Nonemployees [Abstract]
Unrecognized compensation cost related to unvested stock options	$ 4.4	$ 16.8
Expense expected to be recognized over remaining weighted-average period	7 months 6 days	1 year 7 months 6 days
Cash received from stock options exercised	$ 1.0	$ 53.2
Class A common stock
Share-based Arrangements with Employees and Nonemployees [Abstract]
Granted (in shares)	0
Employee Stock Option
Share-based Arrangements with Employees and Nonemployees [Abstract]
Allocated share-based compensation expense	$ 2.1	$ 4.0