SERVICER ADVANCE INVESTMENTS - Summary of Investments in Servicer Advances - Components of Funded Advances (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Schedule of Equity Method Investments [Line Items]
Total	$ 389,905	$ 398,820
Servicer advance investments \| Servicer Advances
Schedule of Equity Method Investments [Line Items]
Principal and interest advances	64,567	66,892
Escrow advances (taxes and insurance advances)	153,908	155,438
Foreclosure advances	120,834	119,298
Total	$ 339,309	$ 341,628

Carrying value of servicer advance investments as of the balance sheet date. Servicer advances are generally reimbursable cash payments made by a servicer when the borrower fails to make scheduled payments due on a mortgage loan or when the servicer makes cash payments (i) on behalf of a borrower for real estate taxes and insurance premiums on the property that have not been paid on a timely basis by the borrower and (ii) to third parties for the costs and expenses incurred in connection with the foreclosure, preservation and sale of the mortgage property, including attorneys' and other professional fees.

No definition available.

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant