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Note 6 - Securities Sold Under Agreements to Repurchase (Tables) | 9 Months Ended
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Sep. 30, 2025
Notes Tables |
Schedule of Repurchase Agreements [Table Text Block] |
|  | Nine Months Ended |  |  | Twelve Months Ended |
(Dollars in thousands) |  | September 30, 2025 |  |  | December 31, 2024 |
Outstanding balance at end of period |  | $ | 251,499 |  |  | $ | 121,521 |
Average interest rate at end of period |  |  | 3.19 | % |  |  | 2.17 | %
Average daily balance during the period |  | $ | 238,897 |  |  | $ | 224,878 |
Average interest rate during the period |  |  | 3.16 | % |  |  | 3.43 | %
Maximum daily balance during the period |  | $ | 285,679 |  |  | $ | 278,227 |

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- Definition The entire disclosure for repurchase agreements. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_TableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration