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	Contingent Class A Common Stock Common Stock
Balance at beginning of period at Dec. 31, 2021	$ 1,664,193	$ 487,447	$ (290,174)	$ 1,079,661	$ (2,731)	$ 386,266	$ 1,940	$ 212	$ 1,572
Increase (Decrease) in Stockholders' Equity
Consolidated net income	112,545			83,275		29,270
Foreign currency translation adjustments	(11,033)				(9,258)	(1,775)
Cantor purchase of Cantor Units from Newmark Holdings upon redemption/exchange of FPU’s	1,582					1,582
Dividends to common stockholders	(17,930)			(17,930)
Earnings distributions to limited partnership interests and other noncontrolling interests	(51,006)					(51,006)
Grant of exchangeability, redemption and issuance of Class A common stock	103,180	82,161				22,520	71		(1,572)
Contributions of capital to and from Cantor for equity-based compensation	2,568	2,097				471
Repurchase of Class A common stock	(294,802)		(248,438)			(46,364)
Restricted stock units compensation	15,568	13,004				2,564
Balance at end of period at Dec. 31, 2022	1,524,865	584,709	(538,612)	1,145,006	(11,989)	343,528	2,011	212	0
Increase (Decrease) in Stockholders' Equity
Consolidated net income	62,375			42,575		19,800
Foreign currency translation adjustments	9,112				7,434	1,678
Cantor purchase of Cantor Units from Newmark Holdings upon redemption/exchange of FPU’s	1,760					1,760
Dividends to common stockholders	(20,906)			(20,906)
Purchase of interests	(21,946)	(3,462)				(18,484)
Earnings distributions to limited partnership interests and other noncontrolling interests	(42,107)					(42,107)
Grant of exchangeability, redemption and issuance of Class A common stock	84,610	61,351				23,175	84
Contributions of capital to and from Cantor for equity-based compensation	(2,782)	(2,182)				(600)
Repurchase of Class A common stock	(37,429)		(30,623)			(6,806)
Restricted stock units compensation	21,130	17,320				3,810
Balance at end of period at Dec. 31, 2023	1,578,682	657,736	(569,235)	1,166,675	(4,555)	325,754	2,095	212	$ 0
Increase (Decrease) in Stockholders' Equity
Consolidated net income	85,491			61,234		24,257
Foreign currency translation adjustments	(8,434)				(6,732)	(1,702)
Cantor purchase of Cantor Units from Newmark Holdings upon redemption/exchange of FPU’s	2,330					2,330
Dividends to common stockholders	(20,624)			(20,624)
Purchase of interests	(12,307)	(9,066)				(3,241)
Earnings distributions to limited partnership interests and other noncontrolling interests	(25,832)					(25,832)
Grant of exchangeability, redemption and issuance of Class A common stock	172,721	126,980				45,591	150
Contributions of capital to and from Cantor for equity-based compensation	(51,461)	(41,331)				(10,130)
Repurchase of Class A common stock	(212,570)		(171,024)			(41,546)
Forfeiture of Class A common stock, 308,426 shares	(6,535)	410	(5,672)			(1,273)
Restricted stock units compensation	22,708	18,272				4,436
Balance at end of period at Dec. 31, 2024	$ 1,524,169	$ 753,001	$ (745,931)	$ 1,207,285	$ (11,287)	$ 318,644	$ 2,245	$ 212