FAIR VALUE OF FINANCIAL INSTRUMENTS - Measurement Inputs and Valuation Techniques (Details) - Residential PACE assessments - Level 3 - Discounted cash flow $ in Thousands	Mar. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 82,258	$ 53,303
Conditional prepayment rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 82,258
Conditional prepayment rate | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input, percent	0.070	0.070
Conditional prepayment rate | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input, percent	0.260	0.260
Conditional prepayment rate | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input, percent	0.182	0.182