GOODWILL AND INTANGIBLE ASSETS - Schedule of Goodwill (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Goodwill [Roll Forward]
Goodwill, beginning balance	$ 1,162,636	$ 1,123,976
Acquisitions	2,285,242	39,696
Reallocation		0
Foreign currency translation	6,229	(1,036)
Goodwill, ending balance	3,454,107	1,162,636
Credit Group
Goodwill [Roll Forward]
Goodwill, beginning balance	312,032	256,679
Acquisitions	0	0
Reallocation		55,658
Foreign currency translation	1,798	(305)
Goodwill, ending balance	313,830	312,032
Real Assets Group
Goodwill [Roll Forward]
Goodwill, beginning balance	311,569	277,205
Acquisitions	2,285,242	35,091
Reallocation		0
Foreign currency translation	4,418	(727)
Goodwill, ending balance	2,601,229	311,569
Secondaries Group
Goodwill [Roll Forward]
Goodwill, beginning balance	417,627	417,630
Acquisitions	0	0
Reallocation		0
Foreign currency translation	13	(3)
Goodwill, ending balance	417,640	417,627
Private Equity Group
Goodwill [Roll Forward]
Goodwill, beginning balance	121,408	172,462
Acquisitions	0	4,605
Reallocation		(55,658)
Foreign currency translation	0	(1)
Goodwill, ending balance	$ 121,408	$ 121,408