INVESTMENTS IN LOANS AND SECURITIES - Equity Method Investments (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Schedule of Equity Method Investments [Line Items]
Equity method and other investments	$ 26,911	$ 26,383
Investments in Pagaya SmartResi F1 Fund, LP
Schedule of Equity Method Investments [Line Items]
Equity method and other investments	$ 17,884	$ 17,357
Equity method investment, ownership percentage	5.40%	5.40%
Other
Schedule of Equity Method Investments [Line Items]
Equity method and other investments	$ 9,027	$ 9,026