GOODWILL AND INTANGIBLE ASSETS - Carrying Value of Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Finite-lived intangible assets, net
Finite-lived intangible assets	$ 843,493	$ 859,957
Foreign currency translation	461	935
Total finite-lived intangible assets	843,954	860,892
Less: accumulated amortization	(245,147)	(220,472)
Finite-lived intangible assets, net	598,807	640,420
Indefinite-lived Intangible Assets [Line Items]
Indefinite-lived intangible assets	567,800	567,800
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Intangible assets, net	1,166,607	1,208,220
Management contracts
Indefinite-lived Intangible Assets [Line Items]
Indefinite-lived intangible assets	$ 567,800	567,800
Management contracts
Finite-lived intangible assets, net
Weighted average amortization period	4 years 9 months 18 days
Finite-lived intangible assets	$ 580,692	586,077
Client relationships
Finite-lived intangible assets, net
Weighted average amortization period	9 years 4 months 24 days
Finite-lived intangible assets	$ 262,301	262,301
Trade name
Finite-lived intangible assets, net
Weighted average amortization period	0 years
Finite-lived intangible assets	$ 0	11,079
Other
Finite-lived intangible assets, net
Weighted average amortization period	1 year 7 months 6 days
Finite-lived intangible assets	$ 500	$ 500