Stock Transactions and Unit Redemptions - Schedule of Changes in Shares of Common Stock Outstanding (Details) - Class A Common Stock - shares	1 Months Ended			3 Months Ended
	Mar. 31, 2024	Feb. 29, 2024	Jan. 31, 2024	Mar. 31, 2024	Mar. 31, 2023
Increase (Decrease) in Stockholders' Equity
Shares outstanding at beginning of period (in shares)			152,639,359	152,639,359	150,384,605
Share issuances:
LPU redemption/exchange (in shares)				2,189,183	1,927,905
Other (in shares)				246,426	(155,240)
Treasury stock repurchases (in shares)	(2,656,916)	(771,477)	(35,006)	(3,463,399)	0
Shares outstanding at end of period (in shares)	152,681,596			152,681,596	153,142,810
Restricted Stock Units
Share issuances:
Issuance of Class A common stock for Newmark RSUs (in shares)				1,070,027	985,540