CONSUMER LOANS - Schedule of Consumer Loan Portfolio (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2024	Dec. 31, 2023
Schedule of Equity Method Investments [Line Items]
Weighted Average Expected Life (Years)	3 years 7 months 6 days
Consumer Portfolio Segment
Schedule of Equity Method Investments [Line Items]
Unpaid Principal Balance	$ 1,154,642	$ 1,308,774
Carrying Value	$ 1,103,799	$ 1,274,005
Weighted Average Coupon	11.80%	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	$ 246,553	$ 260,102
Carrying Value	$ 267,948	$ 285,632
Weighted Average Coupon	18.20%	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	$ 908,089	$ 1,048,672
Carrying Value	$ 835,851	$ 988,373
Weighted Average Coupon	10.10%	10.50%
Weighted Average Expected Life (Years)	1 year	1 year 2 months 12 days