CONSUMER LOANS - Carrying Value of Performing Loans (Details) - USD ($) $ in Thousands	9 Months Ended
Sep. 30, 2023	Sep. 30, 2022
Loans Receivable [Roll Forward]
Proceeds from repayments	$ (35,064)	$ (69,020)
Accretion of loan discount and premium amortization, net	85,063	$ 45,230
Changes in instrument-specific credit risk	0
Other factors	231
Consumer Portfolio Segment \| Performing loans
Loans Receivable [Roll Forward]
Beginning balance	363,756
Purchases	1,317,347
Additional fundings	20,675
Proceeds from repayments	(272,955)
Accretion of loan discount and premium amortization, net	21,281
Changes in instrument-specific credit risk	3,945
Other factors	(17,969)
Ending balance	1,436,080
Consumer Portfolio Segment \| Performing loans \| SpringCastle
Loans Receivable [Roll Forward]
Beginning balance	363,756
Purchases	0
Additional fundings	20,675
Proceeds from repayments	(75,681)
Accretion of loan discount and premium amortization, net	7,178
Changes in instrument-specific credit risk	3,945
Other factors	(15,992)
Ending balance	303,881
Consumer Portfolio Segment \| Performing loans \| Marcus
Loans Receivable [Roll Forward]
Beginning balance	0
Purchases	1,317,347
Additional fundings	0
Proceeds from repayments	(197,274)
Accretion of loan discount and premium amortization, net	14,103
Changes in instrument-specific credit risk	0
Other factors	(1,977)
Ending balance	$ 1,132,199

Financing Receivable, Additional Funding Receivable

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- Definition

Loan Held-For-Investment, Fair Value Disclosure

+ References

No definition available.

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- Definition

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

+ References

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- Definition

Loans-Held-For Investment, Fair Value Adjustment, Other Factors Gain (Loss)

+ References

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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
-Topic 230
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 28
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482740/230-10-45-28

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- Definition

The cash outflow associated with purchasing loans held for investment purposes during the period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 13
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482740/230-10-45-13

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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
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 12
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482740/230-10-45-12

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