Stock Transactions and Unit Purchases - Schedule of Changes in Shares of Common Stock Outstanding (Details) - Class A Common Stock - shares	1 Months Ended			3 Months Ended			12 Months Ended
	Dec. 31, 2024	Nov. 30, 2024	Oct. 31, 2024	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Increase (Decrease) in Stockholders' Equity
Shares outstanding at beginning of period (in shares)						152,639,359	152,639,359	150,384,605	168,272,371
Share issuances:
LPU redemption/exchange (in shares)							12,196,746	6,174,573	4,930,499
Other (in shares)							474	(501,694)	(36,596)
Treasury stock repurchases (in shares)	0	(1,837,131)	(146,035)	(6,779,828)	(5,502,703)	(3,463,399)	(17,729,096)	(5,785,370)	(24,918,482)
Shares outstanding at end of period (in shares)	149,506,832						149,506,832	152,639,359	150,384,605
Restricted Stock Units
Share issuances:
Issuance of Class A common stock for Newmark RSUs (in shares)							2,399,349	2,367,245	2,136,813