FAIR VALUE MEASUREMENTS - Schedule of Weighted Averages of Inputs (Details) $ in Thousands	Sep. 30, 2026 USD ($)	Dec. 31, 2025 USD ($)
RTLs
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 448,931	$ 176,584
RTLs \| Discount Rate \| Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input	0.070	0.076
RTLs \| Discount Rate \| Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input	0.100	0.087
RTLs \| Discount Rate \| Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input	0.078	0.080
RTLs \| Prepayment Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input	0.400	0.500
RTLs \| Default Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input	0.010	0.013
RTLs \| Loss Severity/ Incidence
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input	0.150	0.250
NQMs
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 214,359	$ 87,630
NQMs \| Discount Rate \| Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input	0.059	0.056
NQMs \| Discount Rate \| Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input	0.077	0.069
NQMs \| Discount Rate \| Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input	0.063	0.060
NQMs \| Prepayment Rate \| Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input	0.041	0.058
NQMs \| Prepayment Rate \| Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input	0.269	0.269
NQMs \| Prepayment Rate \| Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input	0.091	0.168
NQMs \| Default Rate \| Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input	0.000	0.000
NQMs \| Default Rate \| Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input	0.056	0.016
NQMs \| Default Rate \| Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input	0.004	0.004
NQMs \| Loss Severity/ Incidence
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input	0.032	0.001