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Note 6 - Securities Sold Under Agreements to Repurchase (Tables) | 3 Months Ended
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Mar. 31, 2022
Notes Tables |
Schedule of Repurchase Agreements [Table Text Block] |
|  | Three Months Ended |  |  | Twelve Months Ended |
|  | March 31, 2022 |  |  | December 31, 2021 |
Outstanding balance at end of period |  | $ | 204,271,000 |  |  | $ | 197,463,000 |
Average interest rate at end of period |  |  | 0.10 | % |  |  | 0.11 | %
Average daily balance during the period |  | $ | 198,949,000 |  |  | $ | 158,855,000 |
Average interest rate during the period |  |  | 0.10 | % |  |  | 0.11 | %
Maximum daily balance during the period |  | $ | 224,345,000 |  |  | $ | 209,093,000 |

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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
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration