CONSUMER LOANS - Consumer Loan Investments made through Equity Method Investees (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2021	Dec. 31, 2020
Schedule of Equity Method Investments [Line Items]
Weighted Average Life (Years)	10 months 24 days
Consumer Portfolio Segment
Schedule of Equity Method Investments [Line Items]
Unpaid Principal Balance	$ 528,554	$ 620,983
Carrying Value	$ 592,126	$ 685,575
Weighted Average Coupon	17.60%	17.40%
Weighted Average Life (Years)	3 years 3 months 18 days	3 years 7 months 6 days
Weighted Average Delinquency	3.60%	4.40%
Consumer Portfolio Segment | Other - Performing Loans
Schedule of Equity Method Investments [Line Items]
Unpaid Principal Balance	$ 960	$ 2,862
Carrying Value	$ 825	$ 2,643
Weighted Average Coupon	15.50%	15.30%
Weighted Average Life (Years)	3 months 18 days	4 months 24 days
Weighted Average Delinquency	7.90%	4.30%
Consumer Portfolio Segment | Performing Loans
Schedule of Equity Method Investments [Line Items]
Unpaid Principal Balance	$ 418,959	$ 490,222
Carrying Value	$ 479,021	$ 553,419
Weighted Average Coupon	18.40%	18.30%
Weighted Average Life (Years)	3 years 3 months 18 days	3 years 7 months 6 days
Weighted Average Delinquency	3.00%	3.70%
Consumer Portfolio Segment | Purchased Credit Deteriorated Loans
Schedule of Equity Method Investments [Line Items]
Unpaid Principal Balance	$ 108,635	$ 127,899
Carrying Value	$ 112,280	$ 129,513
Weighted Average Coupon	14.20%	14.10%
Weighted Average Life (Years)	3 years 3 months 18 days	3 years 6 months
Weighted Average Delinquency	6.20%	7.40%
Consumer Loan SPVs
Schedule of Equity Method Investments [Line Items]
Interest in Consumer Loans	53.50%
Consumer Loan SPVs | Consumer Portfolio Segment | Performing Loans
Schedule of Equity Method Investments [Line Items]
Interest in Consumer Loans	53.50%	53.50%
Consumer Loan SPVs | Consumer Portfolio Segment | Purchased Credit Deteriorated Loans
Schedule of Equity Method Investments [Line Items]
Interest in Consumer Loans	53.50%	53.50%
Entirely Owned Loan Portfolio | Consumer Portfolio Segment | Other - Performing Loans
Schedule of Equity Method Investments [Line Items]
Interest in Consumer Loans	100.00%	100.00%