CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY - USD ($) $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment	Common Stock Class A Common Stock	Common Stock Class B Common Stock	Common Stock Contingent Class A Common Stock	Additional Paid-in Capital	Treasury Stock	Retained Earnings	Retained Earnings Cumulative Effect, Period of Adoption, Adjustment	Accumulated Other Comprehensive Income (Loss)	Noncontrolling Interests	Noncontrolling Interests Cumulative Effect, Period of Adoption, Adjustment
Balance at beginning of period at Dec. 31, 2019	$ 940,625	$ (21,113)	$ 1,608	$ 212	$ 1,461	$ 318,165	$ (34,894)	$ 313,112	$ (17,458)		$ 340,961	$ (3,655)
Increase (Decrease) in Stockholders' Equity
Consolidated net income	109,277							80,060			29,217
Foreign currency translation adjustments	(2,178)									$ (1,776)	(402)
Dividends to common stockholders	(23,171)							(23,171)
Dividend on EPUs	0							(9,779)			9,779
Earnings distributions to limited partnership interests and other noncontrolling interests	(22,365)										(22,365)
Grant of exchangeability, redemption and issuance of Class A common stock	28,773		68			24,747					3,958
Repurchase of Class A common stock	(6,817)						(5,637)				(1,180)
Issuance and redemption of limited partnership units including contingent units	0				111	266					(377)
Restricted stock units compensation	11,290					7,648					3,642
Redemption of EPU's	(93,480)										(93,480)
Other	306					624				(318)
Balance at end of period at Dec. 31, 2020	921,147		1,676	212	1,572	351,450	(40,531)	342,764		(2,094)	266,098
Increase (Decrease) in Stockholders' Equity
Consolidated net income	978,134							750,728			227,406
Foreign currency translation adjustments	(832)									(637)	(195)
Cantor purchase of Cantor units from Newmark Holdings upon redemption/ exchange of FPU's	6,898										6,898
Dividends to common stockholders	(7,631)							(7,631)
Non-Controlling interest in Deskeo	13,464										13,464
Issuance of Class A common stock for acquisition	3,000					2,577					423
Dividend on EPUs								(6,200)			6,200
Earnings distributions to limited partnership interests and other noncontrolling interests	1,805										1,805
Grant of exchangeability, redemption and issuance of Class A common stock	165,644		264			104,121					61,259
Contributions of capital to and from Cantor for equity-based compensation	28,012					19,348					8,664
Repurchase of Class A common stock	(290,184)						(249,643)				(40,541)
Restricted stock units compensation	12,132					9,951					2,181
Redemption of EPU's	(167,396)										(167,396)
Balance at end of period at Dec. 31, 2021	1,664,193		1,940	212	1,572	487,447	(290,174)	1,079,661		(2,731)	386,266
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		71		$ (1,572)	82,161					22,520
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		$ 2,011	$ 212		$ 584,709	$ (538,612)	$ 1,145,006		$ (11,989)	$ 343,528