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, 2022	$ 1,524,865	$ 584,709	$ (538,612)	$ 1,145,006	$ (11,989)	$ 343,528	$ 2,011	$ 212
Increase (Decrease) in Stockholders' Equity
Consolidated net loss	(16,349)			(10,350)		(5,999)
Foreign currency translation adjustments	4,258				3,508	750
Dividends to common stockholders	(5,215)			(5,215)
Purchase of non-controlling interest	(21,946)	(3,462)				(18,484)
Earnings distributions to limited partnership interests and other noncontrolling interests	(9,317)					(9,317)
Grant of exchangeability, redemption and issuance of Class A common stock	20,926	15,256				5,642	28
Contributions of capital to and from Cantor for equity-based compensation	(355)	(303)				(52)
Restricted stock units compensation	5,974	4,950				1,024
Balance at end of period at Mar. 31, 2023	1,502,841	601,150	(538,612)	1,129,441	(8,481)	317,092	2,039	212
Balance at beginning of period at Dec. 31, 2023	1,578,682	657,736	(569,235)	1,166,675	(4,555)	325,754	2,095	212
Increase (Decrease) in Stockholders' Equity
Consolidated net loss	(26,316)			(16,254)		(10,062)
Foreign currency translation adjustments	(2,911)				(2,327)	(584)
Dividends to common stockholders	(5,232)			(5,232)
Earnings distributions to limited partnership interests and other noncontrolling interests	(515)					(515)
Grant of exchangeability, redemption and issuance of Class A common stock	37,420	26,850				10,534	36
Contributions of capital to and from Cantor for equity-based compensation	(301)	(243)				(58)
Repurchase of Class A common stock	(37,161)		(29,993)			(7,168)
Restricted stock units compensation	7,432	5,999				1,433
Balance at end of period at Mar. 31, 2024	$ 1,551,098	$ 690,342	$ (599,228)	$ 1,145,189	$ (6,882)	$ 319,334	$ 2,131	$ 212