FAIR VALUE MEASUREMENTS - Schedule of Inputs Used in Valuing Assets and Liabilities At Fair Value (Details) - Fair Value, Measurements, Nonrecurring - Total $ in Thousands	6 Months Ended
	Jun. 30, 2021 USD ($)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value and Carrying Value	$ 324,383
Discount Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Financing receivable, measurement input	0.052
Weighted Average Life (Years)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Financing receivable, term	3 years 8 months 12 days
Prepayment Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Financing receivable, measurement input	0.045
Delinquency
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Financing receivable, measurement input	0.024
Loss Severity
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Financing receivable, measurement input	0.375
Performing loans
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value and Carrying Value	$ 112,837
Non-performing loans
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value and Carrying Value	$ 211,546
Minimum | Performing loans | Discount Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Financing receivable, measurement input	0.038
Minimum | Performing loans | Weighted Average Life (Years)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Financing receivable, term	4 years 2 months 12 days
Minimum | Performing loans | Prepayment Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Financing receivable, measurement input	0.051
Minimum | Performing loans | Delinquency
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Financing receivable, measurement input	0.014
Minimum | Performing loans | Loss Severity
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Financing receivable, measurement input	0.299
Minimum | Non-performing loans | Discount Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Financing receivable, measurement input	0.050
Minimum | Non-performing loans | Weighted Average Life (Years)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Financing receivable, term	2 years 9 months 18 days
Minimum | Non-performing loans | Prepayment Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Financing receivable, measurement input	0.020
Minimum | Non-performing loans | Delinquency
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Financing receivable, measurement input	0.029
Minimum | Non-performing loans | Loss Severity
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Financing receivable, measurement input	0.086
Maximum | Performing loans | Discount Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Financing receivable, measurement input	0.070
Maximum | Performing loans | Weighted Average Life (Years)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Financing receivable, term	9 years
Maximum | Performing loans | Prepayment Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Financing receivable, measurement input	0.099
Maximum | Performing loans | Delinquency
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Financing receivable, measurement input	0.022
Maximum | Performing loans | Loss Severity
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Financing receivable, measurement input	1.000
Maximum | Non-performing loans | Discount Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Financing receivable, measurement input	0.090
Maximum | Non-performing loans | Weighted Average Life (Years)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Financing receivable, term	3 years 8 months 12 days
Maximum | Non-performing loans | Prepayment Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Financing receivable, measurement input	0.020
Maximum | Non-performing loans | Delinquency
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Financing receivable, measurement input	0.029
Maximum | Non-performing loans | Loss Severity
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Financing receivable, measurement input	0.300
Weighted Average | Performing loans | Discount Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Financing receivable, measurement input	0.049
Weighted Average | Performing loans | Weighted Average Life (Years)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Financing receivable, term	4 years 7 months 6 days
Weighted Average | Performing loans | Prepayment Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Financing receivable, measurement input	0.092
Weighted Average | Performing loans | Delinquency
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Financing receivable, measurement input	0.015
Weighted Average | Performing loans | Loss Severity
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Financing receivable, measurement input	0.538
Weighted Average | Non-performing loans | Discount Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Financing receivable, measurement input	0.053
Weighted Average | Non-performing loans | Weighted Average Life (Years)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Financing receivable, term	3 years 2 months 12 days
Weighted Average | Non-performing loans | Prepayment Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Financing receivable, measurement input	0.020
Weighted Average | Non-performing loans | Delinquency
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Financing receivable, measurement input	0.029
Weighted Average | Non-performing loans | Loss Severity
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Financing receivable, measurement input	0.289