GOODWILL AND INTANGIBLE ASSETS - Narrative (Details) - USD ($)		3 Months Ended		9 Months Ended
	Jun. 02, 2021	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Acquired Finite-Lived Intangible Assets [Line Items]
Impairment of intangible assets (excluding goodwill)		$ 181,600,000		$ 181,600,000
Impaired and fully amortized intangibles, amount removed during the period				210,600,000
Purchase price to goodwill				213,328,000
Reallocation				0
Goodwill impairment				0	$ 0
Trade name
Acquired Finite-Lived Intangible Assets [Line Items]
Impairment of intangible assets (excluding goodwill)		86,200,000
Management Contract
Acquired Finite-Lived Intangible Assets [Line Items]
Impairment of intangible assets (excluding goodwill)		88,400,000
Real Assets Group
Acquired Finite-Lived Intangible Assets [Line Items]
Purchase price to goodwill				213,424,000
Reallocation				10,530,000
From Private Equity Group To Real Assets Group
Acquired Finite-Lived Intangible Assets [Line Items]
Reallocation				10,500,000
From Real Estate Group To Real Assets Group
Acquired Finite-Lived Intangible Assets [Line Items]
Reallocation				53,300,000
General, administrative and other expense
Acquired Finite-Lived Intangible Assets [Line Items]
Amortization expense		32,700,000	$ 32,800,000	101,500,000	$ 60,700,000
Infrastructure Debt Acquisition | Real Assets Group
Acquired Finite-Lived Intangible Assets [Line Items]
Purchase price to goodwill				213,400,000
Infrastructure Debt Acquisition | Management contracts
Acquired Finite-Lived Intangible Assets [Line Items]
Acquisition and merger-related expense				$ 68,700,000
Estimated useful lives, intangible assets				5 years 2 months 12 days
Infrastructure Debt Acquisition | Client relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Acquisition and merger-related expense				$ 32,800,000
Estimated useful lives, intangible assets				8 years 4 months 24 days
Landmark Acquisition | Management Contract
Acquired Finite-Lived Intangible Assets [Line Items]
Impairment of intangible assets (excluding goodwill)		3,700,000
Landmark Acquisition | Management contracts
Acquired Finite-Lived Intangible Assets [Line Items]
Acquisition and merger-related expense	$ 425,900,000
Landmark Acquisition | Client relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Acquisition and merger-related expense	$ 197,200,000
Black Creek Acquisition | Management Contract
Acquired Finite-Lived Intangible Assets [Line Items]
Impairment of intangible assets (excluding goodwill)		3,100,000
SSG Acquisition | Management Contract
Acquired Finite-Lived Intangible Assets [Line Items]
Impairment of intangible assets (excluding goodwill)		$ 200,000