FAIR VALUE MEASUREMENTS - Schedule of Servicer Advance Investments Valuation (Details)	6 Months Ended
	Jun. 30, 2024
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair value inputs, monthly servicing fee	0.022%
Servicer Advances
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Outstanding Servicer Advances to UPB of Underlying Residential Mortgage Loans	2.40%
Servicer Advances | Prepayment Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Servicing asset, measurement input	0.048
Servicer Advances | Delinquency
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Servicing asset, measurement input	0.198
Servicer Advances | Mortgage Servicing Amount
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Servicing asset, measurement input	0.00199
Servicer Advances | Discount Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Servicing asset, measurement input	0.062
Servicer Advances | Collateral Weighted Average Maturity (Years)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Collateral weighted average maturity (years)	21 years 4 months 24 days