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Note 6 - Securities Sold Under Agreements to Repurchase (Tables) | 3 Months Ended
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Mar. 31, 2021
Notes Tables |
Schedule of Repurchase Agreements [Table Text Block] |
|  | Three Months Ended |  |  | Twelve Months Ended |
|  | March 31, 2021 |  |  | December 31, 2020 |
Outstanding balance at end of period |  | $ | 141,310,000 |  |  | $ | 118,365,000 |
Average interest rate at end of period |  |  | 0.11 | % |  |  | 0.12 | %
Average daily balance during the period |  | $ | 132,845,000 |  |  | $ | 132,880,000 |
Average interest rate during the period |  |  | 0.11 | % |  |  | 0.12 | %
Maximum daily balance during the period |  | $ | 169,102,000 |  |  | $ | 173,186,000 |

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- Definition The entire disclosure for repurchase agreements. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(m)(1)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690 + Details
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Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
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Balance Type: | na
Period Type: | duration