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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, 2025	Nov. 30, 2025	Oct. 31, 2025	Jun. 30, 2025	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Increase (Decrease) in Stockholders' Equity
Shares outstanding at beginning of period (in shares)					149,506,832	152,639,359	150,384,605
Share issuances:
LPU redemption/exchange (in shares)					18,198,885	12,196,746	6,174,573
Other (in shares)					388,438	474	(501,694)
Treasury stock repurchases (in shares)	0	0	(134,259)	(10,839,674)	(10,973,933)	(17,729,096)	(5,785,370)
Shares outstanding at end of period (in shares)	160,656,704				160,656,704	149,506,832	152,639,359
Restricted Stock Units
Share issuances:
Issuance of Class A common stock for Newmark RSUs (in shares)					3,536,482	2,399,349	2,367,245

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