CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY (Parenthetical) - $ / shares	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Dividends declared per share of common stock (in dollars per share)	$ 0.03	$ 0.03	$ 0.06	$ 0.06
Dividends declared and paid per share of common stock (in dollars per share)	$ 0.03	$ 0.03	$ 0.06	$ 0.06
FPU's
Issuance of Class A common stock for Newmark RSUs (in shares)		422,646		422,646
Class A Common Stock
Treasury stock repurchases (in shares)	5,502,703	2,354,217	8,966,102	2,354,217
Forfeited of shares (in shares)	735,781		735,781
Class A Common Stock | Common Stock
Grant of exchangeability, redemption and issuance of limited partnership interests and issuance of common stock (in shares)	3,206,036	1,446,005	6,111,672	1,767,863
Treasury stock repurchases (in shares)	5,502,703	2,354,217	8,966,102	1,682,871