INVESTMENTS IN CONSUMER LOANS - Carrying Value of Performing Loans (Details) - USD ($) $ in Thousands	9 Months Ended
Sep. 30, 2020	Sep. 30, 2019
Loans Receivable [Roll Forward]
Proceeds from repayments	$ (100,433)	$ (83,483)
Accretion of loan discount and premium amortization, net	127,456	$ 298,933
Consumer Portfolio Segment \| Performing Loans
Loans Receivable [Roll Forward]
Balance at December 31, 2019	827,545
Fair value adjustment due to fair value option	36,472
Additional fundings	25,008
Proceeds from repayments	(176,127)
Accretion of loan discount and premium amortization, net	18,844
Fair value adjustment, changes in instrument-specific credit risk	(429)
Fair value adjustment, other factors	(9,205)
Balance at September 31, 2020	$ 722,108

Financing Receivable, Additional Funding Receivable

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- Definition

Loans-Held-For Investment, Fair Value Adjustment, Changes In Instrument-Specific Credit Risk

+ References

No definition available.

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Loans-Held-For Investment, Fair Value Adjustment, Other Factors

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Loans-Held-For Investment, Fair Value Adjustments Due To Fair Value Option

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No definition available.

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- Definition

Loans Receivable [Roll Forward]

+ References

No definition available.

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- Definition

The sum of the periodic adjustments of the differences between securities' face values and purchase prices that are charged against earnings. This is called accretion if the security was purchased at a discount and amortization if it was purchased at premium. As a noncash item, this element is an adjustment to net income when calculating cash provided by or used in operations using the indirect method.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585

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- Definition

Amount, after allowance for credit loss, of financing receivable. Excludes financing receivable covered under loss sharing agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 5
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919230-210447

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
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-Subparagraph (SX 210.5-02(3))
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-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
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-Section 45
-Paragraph 2
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- Definition

The cash inflow from repayments of the balance excluding interest (principal) on loans receivable and leases held for investment purposes.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 12
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3179-108585

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