LOANS RECEIVABLE AND REVENUE - Delinquent Loans, Credit Services Organization - Aging Analysis (Details) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Loans and Leases Receivable Disclosure [Line Items]
Delinquent loans receivable guaranteed by the Company	$ 12,869	$ 12,154
0-30 days past-due
Loans and Leases Receivable Disclosure [Line Items]
Delinquent loans receivable guaranteed by the Company	10,718	10,053
31-60 days past-due
Loans and Leases Receivable Disclosure [Line Items]
Delinquent loans receivable guaranteed by the Company	1,296	1,303
61 days past-due
Loans and Leases Receivable Disclosure [Line Items]
Delinquent loans receivable guaranteed by the Company	855	798
Consumer Portfolio Segment | Unsecured Installment
Loans and Leases Receivable Disclosure [Line Items]
Delinquent loans receivable guaranteed by the Company	12,477	11,708
Consumer Portfolio Segment | Unsecured Installment | 0-30 days past-due
Loans and Leases Receivable Disclosure [Line Items]
Delinquent loans receivable guaranteed by the Company	10,392	9,684
Consumer Portfolio Segment | Unsecured Installment | 31-60 days past-due
Loans and Leases Receivable Disclosure [Line Items]
Delinquent loans receivable guaranteed by the Company	1,256	1,255
Consumer Portfolio Segment | Unsecured Installment | 61 days past-due
Loans and Leases Receivable Disclosure [Line Items]
Delinquent loans receivable guaranteed by the Company	829	769
Consumer Portfolio Segment | Secured Installment
Loans and Leases Receivable Disclosure [Line Items]
Delinquent loans receivable guaranteed by the Company	392	446
Consumer Portfolio Segment | Secured Installment | 0-30 days past-due
Loans and Leases Receivable Disclosure [Line Items]
Delinquent loans receivable guaranteed by the Company	326	369
Consumer Portfolio Segment | Secured Installment | 31-60 days past-due
Loans and Leases Receivable Disclosure [Line Items]
Delinquent loans receivable guaranteed by the Company	40	48
Consumer Portfolio Segment | Secured Installment | 61 days past-due
Loans and Leases Receivable Disclosure [Line Items]
Delinquent loans receivable guaranteed by the Company	$ 26	$ 29