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Note 17 - Commitments and Contingencies (Tables) | 12 Months Ended
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Dec. 31, 2024
Notes Tables |
Product Liability Contingencies [Table Text Block] |
|  | 2024 |  |  | 2023 |  |  | 2022 |
|  | (In Thousands) |
Commitments to extend credit |  | $ | 3,552,958 |  |  | $ | 3,410,283 |  |  | $ | 4,230,485 |
Credit card arrangements |  |  | 366,843 |  |  |  | 381,524 |  |  |  | 368,749 |
Standby letters of credit and financial guarantees |  |  | 125,147 |  |  |  | 86,065 |  |  |  | 67,285 |
Total |  | $ | 4,044,948 |  |  | $ | 3,877,872 |  |  | $ | 4,666,519 |
Equity Method Investments [Table Text Block] |
|  |  |  | December 31, |
|  | Balance Sheet Location |  | 2024 |  |  | 2023 |
|  |  |  | (In Thousands) |
Investments in affordable housing projects and other qualified tax credits: |  |  |  |  |  |  |  |  |  |
Carrying amount |  | Other assets |  | $ | 75,705 |  |  | $ | 42,832 |
Amount of future funding commitments including in carrying amount |  | Other liabilities |  |  | 39,502 |  |  |  | - |
Lending exposures |  | Loans |  |  | 88,207 |  |  |  | 84,652 |
SBIC and certain other equity method investments: |  |  |  |  |  |  |  |  |  |
Carrying amount |  | Other assets |  |  | 4,642 |  |  |  | 2,071 |
Amount of future funding commitments not included in carrying amount |  | N/A |  |  | 12,308 |  |  |  | 14,879 |
| Income Statement Location |  | 2024 |
|  |  | (In Thousands) |
Income tax credits and other income tax benefits | Income tax expense |  | $ | (13,392 | )
Amortization expense | Income tax expense |  |  | 11,162 |

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