CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY - USD ($) $ in Thousands	Total	Additional Paid-in Capital	Treasury Stock	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Noncontrolling Interests	Class A Common Stock Common Stock	Class B Common Stock Common Stock
Balance at beginning of period at Dec. 31, 2024	$ 1,524,169	$ 753,001	$ (745,931)	$ 1,207,285	$ (11,287)	$ 318,644	$ 2,245	$ 212
Increase (Decrease) in Stockholders' Equity
Consolidated net income	(15,949)			(8,766)		(7,183)
Foreign currency translation adjustments	5,927				4,973	954
Dividends to common stockholders	(5,420)			(5,420)
Exchange of Cantor Units for Newmark Class A common stock	0	90,030				(90,102)	72
Earnings distributions to limited partnership interests and other noncontrolling interests	(11,198)					(11,198)
Grant of exchangeability, redemption and issuance of Class A common stock	36,179	23,634				12,492	53
Contributions of capital to and from Cantor for equity-based compensation	(828)	(700)				(128)
Forfeiture of Class A common stock	(740)	23	(648)			(115)
Restricted stock units compensation	11,761	9,940				1,821
Other	3,090	2,611				479
Balance at end of period at Mar. 31, 2025	1,546,991	878,539	(746,579)	1,193,099	(6,314)	225,664	2,370	212
Balance at beginning of period at Dec. 31, 2025	1,739,755	998,903	(854,565)	1,311,748	2,808	278,181	2,468	212
Increase (Decrease) in Stockholders' Equity
Consolidated net income	16,615			14,419		2,196
Foreign currency translation adjustments	(5,229)				(4,381)	(848)
Dividends to common stockholders	(5,442)			(5,442)
Earnings distributions to limited partnership interests and other noncontrolling interests	7,789					7,789
Grant of exchangeability, redemption and issuance of Class A common stock	60,576	44,716				15,812	48
Contributions of capital to and from Cantor for equity-based compensation	(2)	(2)
Repurchase of Class A Common Stock	(136,347)		(114,403)			(21,944)
Forfeiture of Class A common stock	(644)	102	(643)			(103)
Restricted stock units compensation	3,499	2,936				563
Balance at end of period at Mar. 31, 2026	$ 1,680,570	$ 1,046,655	$ (969,611)	$ 1,320,725	$ (1,573)	$ 281,646	$ 2,516	$ 212