Notes Receivable from Employees - Additional information (Details) $ in Millions	12 Months Ended
	Dec. 31, 2021 USD ($) note	Dec. 31, 2020 USD ($) note	Dec. 31, 2019 USD ($)
Receivables [Abstract]
Notes outstanding (in notes) | note	321	320
Amortization of forgivable loan expense | $	$ 34.4	$ 29.4	$ 26.3