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FAIR VALUE OF FINANCIAL INSTRUMENTS - Schedule of Quantitative Information (Details) $ in Thousands | Mar. 31, 2023 USD ($) | Dec. 31, 2022 USD ($)
--- | --- | ---
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Carrying Value | $ 519,895 | $ 587,400
CMBS |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Carrying Value | 485,191 | 541,333
CMBS interest-only |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Carrying Value | 9,537 | 10,443
GNMA interest-only |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Carrying Value | 384 | 281
Agency securities |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Carrying Value | 31 | 35
Level 3 |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Carrying Value | $ 485,747 | $ 542,646
Level 3 | Valuation Technique, Discounted Cash Flow | Yield | CMBS | Minimum |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Measurement input | 0.0288 | 0.0289
Level 3 | Valuation Technique, Discounted Cash Flow | Yield | CMBS | Weighted Average |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Measurement input | 0.0567 | 0.0529
Level 3 | Valuation Technique, Discounted Cash Flow | Yield | CMBS | Maximum |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Measurement input | 0.1769 | 0.1747
Level 3 | Valuation Technique, Discounted Cash Flow | Yield | CMBS interest-only | Minimum |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Measurement input | 0.0256 | 0.0139
Level 3 | Valuation Technique, Discounted Cash Flow | Yield | CMBS interest-only | Weighted Average |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Measurement input | 0.0285 | 0.0372
Level 3 | Valuation Technique, Discounted Cash Flow | Yield | CMBS interest-only | Maximum |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Measurement input | 0.2262 | 0.1966
Level 3 | Valuation Technique, Discounted Cash Flow | Yield | GNMA interest-only | Minimum |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Measurement input | 0.0128 | 0.0128
Level 3 | Valuation Technique, Discounted Cash Flow | Yield | GNMA interest-only | Weighted Average |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Measurement input | 0.0595 | 0.0550
Level 3 | Valuation Technique, Discounted Cash Flow | Yield | GNMA interest-only | Maximum |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Measurement input | 0.1000 | 0.1000
Level 3 | Valuation Technique, Discounted Cash Flow | Yield | Agency securities | Minimum |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Measurement input | 0.0270 | 0.0270
Level 3 | Valuation Technique, Discounted Cash Flow | Yield | Agency securities | Weighted Average |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Measurement input | 0.0270 | 0.0270
Level 3 | Valuation Technique, Discounted Cash Flow | Yield | Agency securities | Maximum |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Measurement input | 0.0270 | 0.0270
Recurring | Level 3 | CMBS |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Carrying Value | $ 476,181 | $ 532,304
Recurring | Level 3 | CMBS interest-only |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Carrying Value | 9,150 | 10,026
Recurring | Level 3 | GNMA interest-only |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Carrying Value | 385 | 281
Recurring | Level 3 | Agency securities |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Carrying Value | $ 31 | $ 35

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