SERVICER ADVANCE INVESTMENTS - Summary of Investments in Servicer Advances - Components of Funded Advances (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Schedule of Equity Method Investments [Line Items]
Total	$ 387,669	$ 398,820
Servicer advance investments | Servicer Advances
Schedule of Equity Method Investments [Line Items]
Principal and interest advances	55,058	66,892
Escrow advances (taxes and insurance advances)	142,995	155,438
Foreclosure advances	116,112	119,298
Total	$ 314,165	$ 341,628