ASSET MANAGEMENT REVENUES - Schedule of Asset Management Revenues (Details) - USD ($) $ in Thousands	3 Months Ended								6 Months Ended		9 Months Ended	12 Months Ended
	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2023	Jun. 30, 2022	Sep. 30, 2023	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disaggregation of Revenue [Line Items]
Revenue			$ 1,110,339	$ 824,788	$ 753,909	$ 903,604	$ 1,317,625	$ 1,716,306	$ 1,935,127	$ 3,033,302	$ 3,070,533	$ 3,679,506	$ 4,920,801	$ 3,728,562
Other asset management revenue												2,412	0	0
Total asset management revenues	$ 691,654	$ 1,135,405										3,762,187	4,920,801	3,728,562
Management fees
Disaggregation of Revenue [Line Items]
Revenue												29,465	0	0
Incentive income
Disaggregation of Revenue [Line Items]
Revenue												50,804	0	0
Asset management revenues
Disaggregation of Revenue [Line Items]
Total asset management revenues	$ 82,681											$ 82,681	$ 0	$ 0