FAIR VALUE OF FINANCIAL INSTRUMENTS - Fair Value Measurement Inputs (Details) - Valuation Technique, Discounted Cash Flow	Jun. 30, 2022	Dec. 31, 2021
SBA 7(a) loans receivable, paycheck protection program | Measurement Input, Discount Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input for loans receivable	0.0100	0.0100
Minimum | SBA 7(a) loans receivable, subject to credit risk | Measurement Input, Discount Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input for loans receivable	0.0800	0.0625
Minimum | SBA 7(a) loans receivable, subject to credit risk | Measurement Input, Prepayment Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input for loans receivable	0.0433	0.0500
Minimum | SBA 7(a) loans receivable, subject to loan-backed notes | Measurement Input, Discount Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input for loans receivable	0.0750	0.0575
Minimum | SBA 7(a) loans receivable, subject to loan-backed notes | Measurement Input, Prepayment Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input for loans receivable	0.0500	0.0500
Minimum | SBA 7(a) loans receivable, subject to secured borrowings | Measurement Input, Discount Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input for loans receivable	0.0875	0.0700
Minimum | SBA 7(a) loans receivable, subject to secured borrowings | Measurement Input, Prepayment Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input for loans receivable	0.0500	0.0500
Maximum | SBA 7(a) loans receivable, subject to credit risk | Measurement Input, Discount Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input for loans receivable	0.1000	0.0825
Maximum | SBA 7(a) loans receivable, subject to credit risk | Measurement Input, Prepayment Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input for loans receivable	0.1750	0.1750
Maximum | SBA 7(a) loans receivable, subject to loan-backed notes | Measurement Input, Discount Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input for loans receivable	0.0950	0.0775
Maximum | SBA 7(a) loans receivable, subject to loan-backed notes | Measurement Input, Prepayment Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input for loans receivable	0.1750	0.1750
Maximum | SBA 7(a) loans receivable, subject to secured borrowings | Measurement Input, Discount Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input for loans receivable	0.0950	0.0775
Maximum | SBA 7(a) loans receivable, subject to secured borrowings | Measurement Input, Prepayment Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input for loans receivable	0.1750	0.1750