CONSOLIDATION - Variable Interest Entities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Variable Interest Entity [Line Items]
Assets of consolidated VIEs	$ 24,730,500	$ 22,002,839
Liabilities of consolidated VIEs	19,709,151	17,097,810
Collateralized loan obligations
Variable Interest Entity [Line Items]
Maximum exposure to loss attributable to the company's investment in VIEs	83,100	82,000
Non-Consolidated Variable Interest Entities
Variable Interest Entity [Line Items]
Maximum exposure to loss attributable to the company's investment in VIEs	503,376	393,549
Consolidated VIEs
Variable Interest Entity [Line Items]
Maximum exposure to loss attributable to the company's investment in VIEs	910,600	537,239
Consolidated VIEs | Consolidated Funds
Variable Interest Entity [Line Items]
Assets of consolidated VIEs	15,484,962	13,128,088
Liabilities of consolidated VIEs	13,409,257	11,593,867
Net income attributable to non-controlling interests related to consolidated VIEs	$ 204,571	$ 105,797	$ 115,217