DEBT OBLIGATIONS AND CREDIT FACILITIES - Significant Valuation Inputs (Details)	Sep. 30, 2020
Discount rates | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt instrument, measurement input	0.090
Discount rates | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt instrument, measurement input	0.400
Discount rates | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt instrument, measurement input	0.184
Constant default rates | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt instrument, measurement input	0.020
Constant default rates | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt instrument, measurement input	0.040
Constant default rates | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt instrument, measurement input	0.023
Recovery rates | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt instrument, measurement input	0.600
Recovery rates | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt instrument, measurement input	0.800
Recovery rates | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt instrument, measurement input	0.649