REDEEMABLE NONCONTROLLING INTERESTS - Schedule of Redeemable Noncontrolling Interest (Details) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2025	Mar. 31, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Equity, Attributable to Noncontrolling Interest [Roll Forward]
Beginning balance	$ 19,836	$ 32,431	$ 42,745	$ 32,431	$ 42,757
Net income (loss) attributable to redeemable noncontrolling interests	(36)		86	(215)	74
Redemptions of redeemable noncontrolling interests	(19,800)		(9,492)	(32,216)	(9,492)
Ending balance	0		33,339	0	33,339
Altius
Equity, Attributable to Noncontrolling Interest [Roll Forward]
Beginning balance	0	0	(866)	0	(885)
Net income (loss) attributable to redeemable noncontrolling interests	0		(15)	0	4
Redemptions of redeemable noncontrolling interests	0		0	0	0
Ending balance	0		(881)	0	(881)
XO
Equity, Attributable to Noncontrolling Interest [Roll Forward]
Beginning balance	19,836	21,542	21,890	21,542	22,014
Net income (loss) attributable to redeemable noncontrolling interests	(36)		42	(302)	(82)
Redemptions of redeemable noncontrolling interests	(19,800)		0	(21,240)	0
Ending balance	0		21,932	0	21,932
VTS
Equity, Attributable to Noncontrolling Interest [Roll Forward]
Beginning balance	0	10,889	20,170	10,889	20,046
Net income (loss) attributable to redeemable noncontrolling interests	0		66	87	190
Redemptions of redeemable noncontrolling interests	0	(3,300)	(9,492)	(10,976)	(9,492)
Ending balance	0		10,744	0	10,744
SMI
Equity, Attributable to Noncontrolling Interest [Roll Forward]
Beginning balance	0	$ 0	1,551	0	1,582
Net income (loss) attributable to redeemable noncontrolling interests	0		(7)	0	(38)
Redemptions of redeemable noncontrolling interests	0		0	0	0
Ending balance	$ 0		$ 1,544	$ 0	$ 1,544