INVESTMENTS IN CONSUMER LOANS - Schedule of Aggregate Unpaid Principal Balance and Aggregate Carrying Value (Details) - Parent - Consumer Portfolio Segment $ in Thousands	Sep. 30, 2020 USD ($)
Schedule of Equity Method Investments [Line Items]
Unpaid Principal Balance	$ 667,184
Fair Value	722,108
Fair Value Over (Under) Unpaid Principal Balance	54,924
Under 90 Days
Schedule of Equity Method Investments [Line Items]
Unpaid Principal Balance	656,284
Fair Value	710,367
Fair Value Over (Under) Unpaid Principal Balance	54,083
90 to 119
Schedule of Equity Method Investments [Line Items]
Unpaid Principal Balance	10,900
Fair Value	11,741
Fair Value Over (Under) Unpaid Principal Balance	$ 841