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Note 10 - Commitments and Contingencies (Details Textual) - USD ($) $ in Thousands | Jun. 30, 2023 | Dec. 31, 2022 | Jun. 30, 2022
--- | --- | --- | ---
Assets | $ 2,454,702 | $ 2,387,814 | $ 2,116,454
Unfunded Individual Credit Commitment [Member] |  |  |
Other Commitment | 2,500,000 |  |
Unfunded Individual Credit Commitment [Member] | Contractual Obligations [Member] |  |  |
Assets | 21,400 |  |
Unfunded Outstanding Floor-Plan Financing Commitment [Member] |  |  |
Other Commitment | 10,300 |  |
Credit Protection Program [Member] |  |  |
Loss Contingency, Estimate of Possible Loss | $ 65,000 |  |

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