LOANS RECEIVABLE AND REVENUE - Liability for Losses on CSO Lender-Owned Consumer Loans (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Guarantor Obligations [Roll Forward]
Balance, beginning of period	$ 12,007	$ 17,795
Charge-offs	(165,167)	(169,735)
Recoveries	35,856	35,674
Net charge-offs	(129,311)	(134,061)
Provision for losses	127,927	128,273
Balance, end of period	10,623	12,007
Consumer Portfolio Segment | Unsecured Installment
Guarantor Obligations [Roll Forward]
Balance, beginning of period	11,582	17,073
Charge-offs	(161,557)	(165,266)
Recoveries	33,248	32,341
Net charge-offs	(128,309)	(132,925)
Provision for losses	127,280	127,434
Balance, end of period	10,553	11,582
Consumer Portfolio Segment | Secured Installment
Guarantor Obligations [Roll Forward]
Balance, beginning of period	425	722
Charge-offs	(3,610)	(4,469)
Recoveries	2,608	3,333
Net charge-offs	(1,002)	(1,136)
Provision for losses	647	839
Balance, end of period	$ 70	$ 425