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			6 Months Ended
	Jun. 30, 2024	May 31, 2024	Apr. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Increase (Decrease) in Stockholders' Equity
Shares outstanding at beginning of period (in shares)			152,681,596	152,681,596	152,639,359	153,142,810	152,639,359	150,384,605
Share issuances:
LPU redemption/exchange (in shares)				2,978,758		1,158,346	5,167,941	3,086,251
Other (in shares)				(145,034)		1,051	101,392	(154,189)
Treasury stock repurchases (in shares)	(1,618,619)	(3,884,084)	0	(5,502,703)	(3,463,399)	(2,354,217)	(8,966,102)	(2,354,217)
Shares outstanding at end of period (in shares)	150,384,929			150,384,929	152,681,596	152,234,598	150,384,929	152,234,598
Restricted Stock Units
Share issuances:
Issuance of Class A common stock for Newmark RSUs (in shares)				372,312		286,608	1,442,339	1,272,148