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Note 6 - Fair Values of Assets and Liabilities - Reconciliation of Level 3 Assets (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Balance	$ 2,173,759	$ 1,817,976
Changes in fair value of loans at fair value, included in earnings	72,508	42,061
Changes in fair value due to principal charge-offs, net of recoveries	(167,956)	(130,175)
Changes in fair value due to finance and fee charge-offs	(63,723)	(61,708)
Purchases	530,095	516,523
Finance and fees, added to the account balance	248,075	219,668
Settlements	(642,122)	(608,756)
Balance	$ 2,150,636	$ 1,795,589

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