CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY (Parenthetical) - $ / shares	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Dividends declared per share of common stock (in dollars per share)	$ 0.03	$ 0.03
Dividends declared and paid per share of common stock (in dollars per share)	$ 0.03	$ 0.03
Class A Common Stock
Forfeited of shares (in shares)	60,238
Treasury stock repurchases (in shares)	0	3,463,399
Class A Common Stock | Common Stock
Exchange of Cantor Units for Newmark Class A common stock (in shares)	7,221,277
Grant of exchangeability, redemption and issuance of limited partnership interests and issuance of common stock (in shares)	5,256,679	3,505,636,000
Treasury stock repurchases (in shares)		3,463,399,000