CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY - USD ($) $ in Thousands	Total	Cantor	Additional Paid-in Capital	Additional Paid-in Capital Cantor	Treasury Stock	Retained Deficit	Accumulated Other Comprehensive Income (Loss)	Noncontrolling Interest in Subsidiaries	Class A Common Stock Common Stock	Class B Common Stock Common Stock
Beginning balance at Dec. 31, 2023	$ 898,156		$ 2,105,130		$ (67,414)	$ (1,119,182)	$ (38,582)	$ 13,073	$ 4,036	$ 1,095
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Consolidated net income (loss)	86,216					87,038		(822)
Other comprehensive income (loss), net of tax	(11,507)						(11,326)	(181)
Equity-based compensation	85,549		85,461		(23)				111
Dividends to common stockholders and participating RSU holders	(14,683)					(14,683)
Issuance of Class A common stock (net of costs)	(1,143)		(1,144)						1
Repurchase of Class A common stock	(148,090)				(148,090)
Forfeiture of Class A common stock	(852)		718		(1,570)
Contributions of capital to and from Cantor for equity-based compensation		$ 118		$ 118
Issuance of Class A common stock and RSUs for acquisitions	3,163		3,158						5
Contributions from FMX Equity Partners	171,667		0		0			171,667	0
Other	(26,724)		(26,724)
Ending balance at Jun. 30, 2024	1,041,870		2,166,717		(217,097)	(1,046,827)	(49,908)	183,737	4,153	1,095
Beginning balance at Mar. 31, 2024	924,871		2,162,454		(137,455)	(1,074,819)	(43,270)	12,763	4,103	1,095
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Consolidated net income (loss)	37,175					37,828		(653)
Other comprehensive income (loss), net of tax	(6,678)						(6,638)	(40)
Equity-based compensation	31,972		31,934		(11)				49
Dividends to common stockholders and participating RSU holders	(9,836)					(9,836)
Issuance of Class A common stock (net of costs)	(844)		(845)						1
Repurchase of Class A common stock	(79,481)				(79,481)
Forfeiture of Class A common stock	(67)		83		(150)
Contributions of capital to and from Cantor for equity-based compensation	(183)		(183)
Contributions from FMX Equity Partners	171,667		0		0			171,667	0
Other	(26,726)		(26,726)
Ending balance at Jun. 30, 2024	1,041,870		2,166,717		(217,097)	(1,046,827)	(49,908)	183,737	4,153	1,095
Beginning balance at Dec. 31, 2024	1,079,239		2,311,104		(331,728)	(1,026,359)	(59,849)	180,732	4,244	1,095
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Consolidated net income (loss)	109,644					112,709		(3,065)
Other comprehensive income (loss), net of tax	19,332						18,778	554
Equity-based compensation	86,791		86,690		(12)				113
Dividends to common stockholders and participating RSU holders	(19,564)					(19,564)
Issuance of Class A common stock (net of costs)	(1,053)		(1,054)						1
Repurchase of Class A common stock	(171,635)				(171,635)
Forfeiture of Class A common stock	(152)		224		(376)
Contributions of capital to and from Cantor for equity-based compensation		$ 1,220		$ 1,220
Issuance of Class A common stock and RSUs for acquisitions	6,028		6,022						6
Other	(1,167)		(1,167)
Ending balance at Jun. 30, 2025	1,108,683		2,403,039		(503,751)	(933,214)	(41,071)	178,221	4,364	1,095
Beginning balance at Mar. 31, 2025	1,142,951		2,348,207		(355,084)	(981,052)	(53,696)	179,167	4,314	1,095
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Consolidated net income (loss)	56,215					57,545		(1,330)
Other comprehensive income (loss), net of tax	13,009						12,625	384
Equity-based compensation	53,522		53,483		(7)				46
Dividends to common stockholders and participating RSU holders	(9,707)					(9,707)
Issuance of Class A common stock (net of costs)	(466)		(467)						1
Repurchase of Class A common stock	(148,510)				(148,510)
Forfeiture of Class A common stock	(62)		88		(150)
Contributions of capital to and from Cantor for equity-based compensation	391		391
Issuance of Class A common stock and RSUs for acquisitions	2,507		2,504						3
Other	(1,167)		(1,167)
Ending balance at Jun. 30, 2025	$ 1,108,683		$ 2,403,039		$ (503,751)	$ (933,214)	$ (41,071)	$ 178,221	$ 4,364	$ 1,095