LEASES - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Lessee, Lease, Description [Line Items]
Rent expense, net of sublease income	$ 11.9	$ 12.2
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Assets of consolidated funds		Assets of consolidated funds
Operating Lease, Liability, Statement of Financial Position [Extensible Enumeration]	Accrued expenses and other liabilities (includes $251,709 and $333,688 at fair value, respectively)		Accrued expenses and other liabilities (includes $251,709 and $333,688 at fair value, respectively)
Sublease rentals	$ 19.3
Collateral Pledged
Lessee, Lease, Description [Line Items]
Lease obligations	$ 6.2