FAIR VALUE DISCLOSURES - Narrative (Details) - Discount Rate	Jun. 30, 2020
Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans receivable, measurement input	0.06
Preferred equity investments, measurement input	0.12
Minimum | Secured Indebtedness
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt, measurement input	0.02
Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans receivable, measurement input	0.20
Preferred equity investments, measurement input	0.15
Maximum | Secured Indebtedness
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt, measurement input	0.04
Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans receivable, measurement input	0.13
Preferred equity investments, measurement input	0.13
Weighted Average | Secured Indebtedness
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt, measurement input	0.03