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DERIVATIVE INSTRUMENTS - Schedule of Unobservable Inputs used in Valuation of Company’s Level 3 MVC Credit Support Agreement (Details) - Barings LLC | Mar. 31, 2023 USD ($) | Dec. 31, 2022 USD ($)
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MVC Credit Support Agreement |  |
Derivative [Line Items] |  |
Fair Value | $ 13,272,000 | $ 12,386,000
MVC Credit Support Agreement | Minimum | Discount Rate | Income Approach |  |
Derivative [Line Items] |  |
Measurement input | 0.065 | 0.071
MVC Credit Support Agreement | Maximum | Discount Rate | Income Approach |  |
Derivative [Line Items] |  |
Measurement input | 0.075 | 0.081
MVC Credit Support Agreement | Weighted Average | Discount Rate | Income Approach |  |
Derivative [Line Items] |  |
Measurement input | 0.070 | 0.076
Sierra Credit Support Agreement |  |
Derivative [Line Items] |  |
Fair Value | $ 45,400,000 | $ 40,700,000
Sierra Credit Support Agreement | Minimum | Enterprise Value | Simulation Analysis |  |
Derivative [Line Items] |  |
Measurement input | 100 | 100
Sierra Credit Support Agreement | Minimum | Asset Volatility | Simulation Analysis |  |
Derivative [Line Items] |  |
Measurement input | 0.400 | 0.375
Sierra Credit Support Agreement | Minimum | Time Until Exit (years) | Simulation Analysis |  |
Derivative [Line Items] |  |
Measurement input | 0.0 | 0.0
Sierra Credit Support Agreement | Minimum | Recovery Rate | Simulation Analysis |  |
Derivative [Line Items] |  |
Measurement input | 0.000 | 0.000
Sierra Credit Support Agreement | Maximum | Enterprise Value | Simulation Analysis |  |
Derivative [Line Items] |  |
Measurement input | 141,100 | 403,500
Sierra Credit Support Agreement | Maximum | Asset Volatility | Simulation Analysis |  |
Derivative [Line Items] |  |
Measurement input | 0.700 | 0.700
Sierra Credit Support Agreement | Maximum | Time Until Exit (years) | Simulation Analysis |  |
Derivative [Line Items] |  |
Measurement input | 8.8 | 9.1
Sierra Credit Support Agreement | Maximum | Recovery Rate | Simulation Analysis |  |
Derivative [Line Items] |  |
Measurement input | 0.700 | 0.700
Sierra Credit Support Agreement | Weighted Average | Enterprise Value | Simulation Analysis |  |
Derivative [Line Items] |  |
Measurement input | 70,600 | 201,800
Sierra Credit Support Agreement | Weighted Average | Asset Volatility | Simulation Analysis |  |
Derivative [Line Items] |  |
Measurement input | 0.550 | 0.538
Sierra Credit Support Agreement | Weighted Average | Time Until Exit (years) | Simulation Analysis |  |
Derivative [Line Items] |  |
Measurement input | 4.4 | 4.6
Sierra Credit Support Agreement | Weighted Average | Recovery Rate | Simulation Analysis |  |
Derivative [Line Items] |  |
Measurement input | 0.350 | 0.350

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