CONSOLIDATION - Variable Interest Entities (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Variable Interest Entity [Line Items]
Assets of consolidated VIEs	$ 21,131,203		$ 21,605,164
Liabilities of consolidated VIEs	16,367,235		16,694,730
Collateralized loan obligations
Variable Interest Entity [Line Items]
Maximum exposure to loss attributable to the company's investment in VIEs	101,300		103,800
Consolidated Funds
Variable Interest Entity [Line Items]
Net income attributable to non-controlling interests related to consolidated VIEs	47,382	$ 49,858
Non-Consolidated Variable Interest Entities
Variable Interest Entity [Line Items]
Maximum exposure to loss attributable to the company's investment in VIEs	362,552		353,768
Consolidated VIEs
Variable Interest Entity [Line Items]
Maximum exposure to loss attributable to the company's investment in VIEs	601,252		583,192
Consolidated VIEs | Consolidated Funds
Variable Interest Entity [Line Items]
Assets of consolidated VIEs	12,495,278		13,197,321
Liabilities of consolidated VIEs	11,221,527		$ 12,018,655
Net income attributable to non-controlling interests related to consolidated VIEs	$ 38,462	$ 27,816