CONSOLIDATION - Variable Interest Entities (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Variable Interest Entity [Line Items]
Assets of consolidated VIEs	$ 24,413,270		$ 24,730,500
Liabilities of consolidated VIEs	19,382,799		19,709,151
Collateralized loan obligations
Variable Interest Entity [Line Items]
Maximum exposure to loss attributable to the company's investment in VIEs	83,200		83,100
Non-Consolidated Variable Interest Entities
Variable Interest Entity [Line Items]
Maximum exposure to loss attributable to the company's investment in VIEs	399,885		503,376
Consolidated VIEs
Variable Interest Entity [Line Items]
Maximum exposure to loss attributable to the company's investment in VIEs	908,198		910,600
Consolidated VIEs | Consolidated Funds
Variable Interest Entity [Line Items]
Assets of consolidated VIEs	15,335,745		15,484,962
Liabilities of consolidated VIEs	13,058,395		$ 13,409,257
Net income attributable to non-controlling interests related to consolidated VIEs	$ 58,356	$ 37,131