LOANS RECEIVABLE AND REVENUE - Delinquent Loans - Aging Analysis (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total gross loans receivable	$ 882,356	$ 553,722
Delinquent loans receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total gross loans receivable	83,132	70,244
Consumer Portfolio Segment | Delinquent loans receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total gross loans receivable	83,132	70,244
Consumer Portfolio Segment | 0-30 days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total gross loans receivable	39,049	31,642
Consumer Portfolio Segment | 31-60 days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total gross loans receivable	20,511	18,599
Consumer Portfolio Segment | 61 + days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total gross loans receivable	23,572	20,003
Consumer Portfolio Segment | Revolving LOC
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total gross loans receivable	720,054	358,884
Consumer Portfolio Segment | Revolving LOC | Delinquent loans receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total gross loans receivable	54,924	37,779
Consumer Portfolio Segment | Revolving LOC | 0-30 days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total gross loans receivable	27,449	17,517
Consumer Portfolio Segment | Revolving LOC | 31-60 days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total gross loans receivable	12,721	9,276
Consumer Portfolio Segment | Revolving LOC | 61 + days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total gross loans receivable	14,754	10,986
Consumer Portfolio Segment | Total Installment - Company Owned
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total gross loans receivable	162,302	194,838
Consumer Portfolio Segment | Total Installment - Company Owned | Delinquent loans receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total gross loans receivable	28,208	32,465
Consumer Portfolio Segment | Total Installment - Company Owned | 0-30 days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total gross loans receivable	11,600	14,125
Consumer Portfolio Segment | Total Installment - Company Owned | 31-60 days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total gross loans receivable	7,790	9,323
Consumer Portfolio Segment | Total Installment - Company Owned | 61 + days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total gross loans receivable	8,818	9,017
Consumer Portfolio Segment | Unsecured Installment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total gross loans receivable	82,805	102,425
Consumer Portfolio Segment | Unsecured Installment | Delinquent loans receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total gross loans receivable	20,953	24,190
Consumer Portfolio Segment | Unsecured Installment | 0-30 days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total gross loans receivable	7,933	10,361
Consumer Portfolio Segment | Unsecured Installment | 31-60 days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total gross loans receivable	5,914	7,124
Consumer Portfolio Segment | Unsecured Installment | 61 + days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total gross loans receivable	7,106	6,705
Consumer Portfolio Segment | Secured Installment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total gross loans receivable	39,166	48,633
Consumer Portfolio Segment | Secured Installment | Delinquent loans receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total gross loans receivable	7,255	8,275
Consumer Portfolio Segment | Secured Installment | 0-30 days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total gross loans receivable	3,667	3,764
Consumer Portfolio Segment | Secured Installment | 31-60 days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total gross loans receivable	1,876	2,199
Consumer Portfolio Segment | Secured Installment | 61 + days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total gross loans receivable	$ 1,712	$ 2,312