SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Schedule of investments in the VIE (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Variable Interest Entity [Line Items]
Securities and other investments owned, at fair value	$ 1,092,106	$ 1,129,268
Other assets	47,542	45,116
Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Securities and other investments owned, at fair value	28,573	33,743
Loans receivable, at fair value	250,801	46,700
Other assets	11,418	3,755
Maximum exposure to loss	$ 290,792	$ 84,198