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Note 6 - Fair Values of Assets and Liabilities - Reconciliation of Level 3 Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Balance	$ 1,817,976	$ 1,026,424
Changes in fair value of loans at fair value, included in earnings	71,024	(32,574)
Changes in fair value due to principal charge-offs, net of recoveries	(538,146)	(367,213)
Changes in fair value due to finance and fee charge-offs	(222,455)	(177,282)
Purchases	2,427,095	2,466,676
Finance and fees, added to the account balance	970,006	874,749
Settlements	(2,351,741)	(2,287,789)
Balance	2,173,759	1,817,976
Cumulative Effect, Period of Adoption, Adjustment [Member]
Balance	$ 0	314,985
Balance		$ 0

X

- Definition

Amount of finance and fees of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

+ References

No definition available.

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- Definition

Amount of principal write offs of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

+ References

No definition available.

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- Definition

Amount of write offs of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

+ References

No definition available.

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- Definition

Amount of gain (loss) recognized in income from asset measured at fair value on recurring basis using unobservable input (level 3).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(1)
-Publisher FASB
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- Definition

Amount of purchases of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-Topic 820
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-Section 50
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Amount of settlement of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-Section 50
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Fair value of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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