FAIR VALUE OF FINANCIAL INSTRUMENTS - Fair Value Measurement Inputs (Details) - Valuation Technique, Discounted Cash Flow	Dec. 31, 2022	Dec. 31, 2021
SBA 7(a) loans receivable, Paycheck Protection Program | Discount Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input for loans receivable		0.0100
Minimum | SBA 7(a) loans receivable, subject to credit risk | Discount Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input for loans receivable	0.1100	0.0625
Minimum | SBA 7(a) loans receivable, subject to credit risk | 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 loan-backed notes | Discount Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input for loans receivable		0.0575
Minimum | SBA 7(a) loans receivable, subject to loan-backed notes | Prepayment Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input for loans receivable		0.0500
Minimum | SBA 7(a) loans receivable, subject to secured borrowings | Discount Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input for loans receivable	0.1100	0.0700
Minimum | SBA 7(a) loans receivable, subject to secured borrowings | 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 | Discount Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input for loans receivable	0.1125	0.0825
Maximum | SBA 7(a) loans receivable, subject to credit risk | Prepayment Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input for loans receivable	0.1700	0.1750
Maximum | SBA 7(a) loans receivable, subject to loan-backed notes | Discount Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input for loans receivable		0.0775
Maximum | SBA 7(a) loans receivable, subject to loan-backed notes | Prepayment Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input for loans receivable		0.1750
Maximum | SBA 7(a) loans receivable, subject to secured borrowings | Discount Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input for loans receivable	0.1125	0.0775
Maximum | SBA 7(a) loans receivable, subject to secured borrowings | Prepayment Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Measurement input for loans receivable	0.1700	0.1750