FAIR VALUE MEASUREMENTS - Information Regarding the Inputs used in Valuing the Servicer Advances (Details) - Servicer Advances	6 Months Ended	12 Months Ended
	Jun. 30, 2025	Dec. 31, 2024
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair value inputs, monthly servicing fee	0.043%	0.038%
Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Outstanding Servicer Advances to UPB of Underlying Residential Mortgage Loans	2.10%	2.10%
Minimum | Prepayment Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Servicing asset, measurement input	0.047	0.046
Minimum | Delinquency
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Servicing asset, measurement input	0.189	0.196
Minimum | Mortgage Servicing Amount
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Servicing asset, measurement input	0.00199	0.00199
Minimum | Discount Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Servicing asset, measurement input	0.065	0.065
Weighted Average | Collateral Weighted Average Maturity (Years)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Collateral Weighted Average Maturity (Years)	20 years 8 months 12 days	21 years 1 month 6 days