GOODWILL AND INTANGIBLE ASSETS - Schedule of Carrying Value of Intangible Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Finite-lived intangible assets, net
Finite-lived intangible assets	$ 782,055	$ 805,662
Foreign currency translation	(202)	1,126
Total finite-lived intangible assets	781,853	806,788
Less: accumulated amortization	(319,577)	(316,093)
Finite-Lived Intangible Assets, Net, Total	462,276	490,695
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Intangible assets, net	1,030,076	1,058,495
Management contracts
Indefinite-lived Intangible Assets [Line Items]
Indefinite-lived management contracts	$ 567,800	567,800
Management contracts
Finite-lived intangible assets, net
Weighted average amortization period	4 years 2 months 12 days
Finite-lived intangible assets	$ 580,635	604,242
Client relationships
Finite-lived intangible assets, net
Weighted average amortization period	8 years 3 months 18 days
Finite-lived intangible assets	$ 200,920	200,920
Other
Finite-lived intangible assets, net
Weighted average amortization period	7 months 6 days
Finite-lived intangible assets	$ 500	$ 500