LOANS RECEIVABLE AND REVENUE - Allowance For Doubtful Accounts - CSO Guarantee Liability (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Allowance for loan losses:
Provision for loan losses	$ 70,718	$ 54,750	$ 152,028	$ 218,979
Liability for losses on CSO lender-owned consumer loans:
Balance, beginning of period			7,228
Balance, end of period	7,007		7,007
Consumer Portfolio Segment
Allowance for loan losses:
Balance, beginning of period	67,860	76,802	86,162	106,835
Charge-offs	(76,135)	(66,655)	(225,696)	(305,209)
Recoveries	34,265	29,971	105,570	113,895
Net charge-offs	(41,870)	(36,684)	(120,126)	(191,314)
Provision for loan losses	47,572	39,814	106,651	165,932
Effect of foreign currency translation	(1,019)	650	(144)	(871)
Balance, end of period	72,543	80,582	72,543	80,582
Liability for losses on CSO lender-owned consumer loans:
Balance, beginning of period	5,265	5,164	7,228	10,623
Increase (decrease) in liability	1,742	1,034	(221)	(4,425)
Balance, end of period	7,007	6,198	7,007	6,198
Consumer Portfolio Segment | Revolving LOC
Allowance for loan losses:
Balance, beginning of period	44,847	47,319	51,958	55,074
Charge-offs	(27,974)	(22,781)	(81,175)	(104,074)
Recoveries	8,564	4,618	23,351	17,129
Net charge-offs	(19,410)	(18,163)	(57,824)	(86,945)
Provision for loan losses	27,800	21,655	58,274	83,987
Effect of foreign currency translation	(975)	606	(146)	(699)
Balance, end of period	52,262	51,417	52,262	51,417
Liability for losses on CSO lender-owned consumer loans:
Balance, beginning of period	0	0	0	0
Increase (decrease) in liability	0	0	0	0
Balance, end of period	0	0	0	0
Consumer Portfolio Segment | Total Installment
Allowance for loan losses:
Balance, beginning of period	23,013	29,483	34,204	51,761
Charge-offs	(47,292)	(42,902)	(141,996)	(198,135)
Recoveries	25,300	24,855	80,888	95,291
Net charge-offs	(21,992)	(18,047)	(61,108)	(102,844)
Provision for loan losses	19,304	17,685	47,183	80,420
Effect of foreign currency translation	(44)	44	2	(172)
Balance, end of period	20,281	29,165	20,281	29,165
Liability for losses on CSO lender-owned consumer loans:
Balance, beginning of period	5,265	5,164	7,228	10,623
Increase (decrease) in liability	1,742	1,034	(221)	(4,425)
Balance, end of period	7,007	6,198	7,007	6,198
Consumer Portfolio Segment | Unsecured Installment
Allowance for loan losses:
Balance, beginning of period	16,701	18,798	24,073	35,587
Charge-offs	(18,400)	(14,781)	(58,337)	(83,468)
Recoveries	4,811	5,186	16,811	17,982
Net charge-offs	(13,589)	(9,595)	(41,526)	(65,486)
Provision for loan losses	11,223	9,647	31,782	48,766
Effect of foreign currency translation	(5)	9	1	(8)
Balance, end of period	14,330	18,859	14,330	18,859
Liability for losses on CSO lender-owned consumer loans:
Balance, beginning of period	5,234	5,128	7,160	10,553
Increase (decrease) in liability	1,739	1,002	(187)	(4,423)
Balance, end of period	6,973	6,130	6,973	6,130
Consumer Portfolio Segment | Secured Installment
Allowance for loan losses:
Balance, beginning of period	3,880	7,883	7,047	10,305
Charge-offs	(4,252)	(6,648)	(14,979)	(31,505)
Recoveries	1,996	2,635	6,756	8,505
Net charge-offs	(2,256)	(4,013)	(8,223)	(23,000)
Provision for loan losses	1,858	3,239	4,658	19,804
Effect of foreign currency translation	0	0	0	0
Balance, end of period	3,482	7,109	3,482	7,109
Liability for losses on CSO lender-owned consumer loans:
Balance, beginning of period	31	36	68	70
Increase (decrease) in liability	3	32	(34)	(2)
Balance, end of period	34	68	34	68
Consumer Portfolio Segment | Single-Pay
Allowance for loan losses:
Balance, beginning of period	2,432	2,802	3,084	5,869
Charge-offs	(24,640)	(21,473)	(68,680)	(83,162)
Recoveries	18,493	17,034	57,321	68,804
Net charge-offs	(6,147)	(4,439)	(11,359)	(14,358)
Provision for loan losses	6,223	4,799	10,743	11,850
Effect of foreign currency translation	(39)	35	1	(164)
Balance, end of period	2,469	3,197	2,469	3,197
Liability for losses on CSO lender-owned consumer loans:
Balance, beginning of period	0	0	0	0
Increase (decrease) in liability	0	0	0	0
Balance, end of period	0	0	0	0
Consumer Portfolio Segment | Other
Allowance for loan losses:
Balance, beginning of period	0	0	0	0
Charge-offs	(869)	(972)	(2,525)	(3,000)
Recoveries	401	498	1,331	1,475
Net charge-offs	(468)	(474)	(1,194)	(1,525)
Provision for loan losses	468	474	1,194	1,525
Effect of foreign currency translation	0	0	0	0
Balance, end of period	0	0	0	0
Liability for losses on CSO lender-owned consumer loans:
Balance, beginning of period	0	0	0	0
Increase (decrease) in liability	0	0	0	0
Balance, end of period	$ 0	$ 0	$ 0	$ 0