GOODWILL AND INTANGIBLE ASSETS - Schedule of Goodwill (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2025 USD ($)
Goodwill [Roll Forward]
Goodwill, beginning balance	$ 1,162,636
Acquisitions	2,270,287
Foreign currency translation	3,269
Goodwill, ending balance	3,436,192
Credit Group
Goodwill [Roll Forward]
Goodwill, beginning balance	312,032
Acquisitions	0
Foreign currency translation	107
Goodwill, ending balance	312,139
Real Assets Group
Goodwill [Roll Forward]
Goodwill, beginning balance	311,569
Acquisitions	2,270,287
Foreign currency translation	3,146
Goodwill, ending balance	2,585,002
Private Equity Group
Goodwill [Roll Forward]
Goodwill, beginning balance	121,408
Acquisitions	0
Foreign currency translation	0
Goodwill, ending balance	121,408
Secondaries Group
Goodwill [Roll Forward]
Goodwill, beginning balance	417,627
Acquisitions	0
Foreign currency translation	16
Goodwill, ending balance	$ 417,643