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 income (loss)	(5,120)			(3,921)		(1,199)
Foreign currency translation adjustments	7,951				6,546	1,405
Stock issued during period, value	1,760					1,760
Dividends to common stockholders	(10,441)			(10,441)
Purchase of non-controlling interest	(21,946)	(3,462)				(18,484)
Earnings distributions to limited partnership interests and other noncontrolling interests	(31,739)					(31,739)
Grant of exchangeability, redemption and issuance of Class A common stock	34,206	25,169				8,995	42
Contributions of capital to and from Cantor for equity-based compensation	(506)	(457)				(49)
Repurchase of Class A common stock	(13,361)		(11,005)			(2,356)
Restricted stock units compensation	9,541	7,888				1,653
Balance at end of period at Jun. 30, 2023	1,495,210	613,847	(549,617)	1,130,644	(5,443)	303,514	2,053	212
Balance at beginning of period at Mar. 31, 2023	1,502,841	601,150	(538,612)	1,129,441	(8,481)	317,092	2,039	212
Increase (Decrease) in Stockholders' Equity
Consolidated net income (loss)	11,229			6,429		4,800
Foreign currency translation adjustments	3,693				3,038	655
Stock issued during period, value	1,760					1,760
Dividends to common stockholders	(5,226)			(5,226)
Earnings distributions to limited partnership interests and other noncontrolling interests	(22,422)					(22,422)
Grant of exchangeability, redemption and issuance of Class A common stock	13,280	9,913				3,353	14
Contributions of capital to and from Cantor for equity-based compensation	(151)	(154)				3
Repurchase of Class A common stock	(13,361)		(11,005)			(2,356)
Restricted stock units compensation	3,567	2,938				629
Balance at end of period at Jun. 30, 2023	1,495,210	613,847	(549,617)	1,130,644	(5,443)	303,514	2,053	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 income (loss)	(2,900)			(1,973)	0	(927)
Foreign currency translation adjustments	(5,062)				(4,052)	(1,010)
Dividends to common stockholders	(10,422)			(10,422)
Earnings distributions to limited partnership interests and other noncontrolling interests	(2,300)					(2,300)
Grant of exchangeability, redemption and issuance of Class A common stock	54,122	37,843				16,209	70
Contributions of capital to and from Cantor for equity-based compensation	(438)	(353)				(85)
Repurchase of Class A common stock	(92,668)		(74,705)			(17,963)
Forfeiture of Class A common stock	(5,549)	410	(4,880)			(1,079)
Restricted stock units compensation	9,498	7,663				1,835
Balance at end of period at Jun. 30, 2024	1,522,963	703,299	(648,820)	1,154,280	(8,607)	320,434	2,165	212
Balance at beginning of period at Mar. 31, 2024	1,551,098	690,342	(599,228)	1,145,189	(6,882)	319,334	2,131	212
Increase (Decrease) in Stockholders' Equity
Consolidated net income (loss)	23,415			14,280		9,135
Foreign currency translation adjustments	(2,151)				(1,725)	(426)
Dividends to common stockholders	(5,189)			(5,189)
Earnings distributions to limited partnership interests and other noncontrolling interests	(1,785)					(1,785)
Grant of exchangeability, redemption and issuance of Class A common stock	16,702	10,993				5,675	34
Contributions of capital to and from Cantor for equity-based compensation	(137)	(110)				(27)
Repurchase of Class A common stock	(55,507)		(44,712)			(10,795)
Forfeiture of Class A common stock	(5,549)	410	(4,880)			(1,079)
Restricted stock units compensation	2,066	1,664				402
Balance at end of period at Jun. 30, 2024	$ 1,522,963	$ 703,299	$ (648,820)	$ 1,154,280	$ (8,607)	$ 320,434	$ 2,165	$ 212