INVESTMENTS - Schedule of Investments of the Consolidated Funds (Details) - Consolidated Funds  - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Investments
Total investments, at fair value	$ 14,601,587	$ 13,204,633
Fixed income investments:
Investments
Total investments, at fair value	$ 11,718,445	$ 11,080,865
Percentage of total investments	80.30%	84.00%
Fixed income investments: | Loans and securitization vehicles
Investments
Total investments, at fair value	$ 10,616,458	$ 9,280,522
Percentage of total investments	72.70%	70.30%
Fixed income investments: | Bonds
Investments
Total investments, at fair value	$ 578,949	$ 786,961
Percentage of total investments	4.00%	6.00%
Fixed income investments: | Money market funds and U.S. treasury securities
Investments
Total investments, at fair value	$ 523,038	$ 1,013,382
Percentage of total investments	3.60%	7.70%
Partnership interests
Investments
Total investments, at fair value	$ 1,642,489	$ 1,392,169
Percentage of total investments	11.20%	10.50%
Equity securities
Investments
Total investments, at fair value	$ 1,240,653	$ 731,599
Percentage of total investments	8.50%	5.50%