CONSUMER LOANS - Schedule of Consumer Loan Portfolio Measured at Fair Value (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
Sep. 30, 2024	Dec. 31, 2023
Schedule of Equity Method Investments [Line Items]
Weighted Average Expected Life (Years)	3 years 9 months 18 days
Consumer Portfolio Segment
Schedule of Equity Method Investments [Line Items]
Unpaid Principal Balance	$ 882,783	$ 1,308,774
Carrying Value	$ 805,577	$ 1,274,005
Weighted Average Coupon	12.70%	12.00%
Weighted Average Expected Life (Years)	1 year 7 months 6 days	1 year 8 months 12 days
Consumer Portfolio Segment \| SpringCastle
Schedule of Equity Method Investments [Line Items]
Unpaid Principal Balance	$ 219,629	$ 260,102
Carrying Value	$ 231,039	$ 285,632
Weighted Average Coupon	18.10%	18.20%
Weighted Average Expected Life (Years)	3 years 9 months 18 days	3 years 8 months 12 days
Consumer Portfolio Segment \| Marcus
Schedule of Equity Method Investments [Line Items]
Unpaid Principal Balance	$ 663,154	$ 1,048,672
Carrying Value	$ 574,538	$ 988,373
Weighted Average Coupon	10.90%	10.50%
Weighted Average Expected Life (Years)	10 months 24 days	1 year 2 months 12 days