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Note 4 - Securities (Tables) | 9 Months Ended
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Sep. 30, 2019
Notes Tables |
Available-for-sale Securities [Table Text Block] |
|  | September 30, 2019
|  | Amortized Costs |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Fair Values
Available for Sale: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. Government agencies and corporations |  | $ | 162,855 |  |  | $ | 2,636 |  |  | $ | 428 |  |  | $ | 165,063 |
States and political subdivisions |  |  | 82,520 |  |  |  | 1,550 |  |  |  | 48 |  |  |  | 84,022 |
Mortgage-backed securities |  |  | 81,141 |  |  |  | 91 |  |  |  | 298 |  |  |  | 80,934 |
Corporate debt securities |  |  | 3,996 |  |  |  | 135 |  |  |  | --- |  |  |  | 4,131 |
Total securities available for sale |  | $ | 330,512 |  |  | $ | 4,412 |  |  | $ | 774 |  |  | $ | 334,150 |
|  | December 31, 2018
|  | Amortized Costs |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Fair Values
Available for S ale: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. Government agencies and corporations |  | $ | 306,264 |  |  | $ | 449 |  |  | $ | 6,666 |  |  | $ | 300,047 |
States and political subdivisions |  |  | 118,564 |  |  |  | 1,218 |  |  |  | 1,166 |  |  |  | 118,616 |
Mortgage-backed securities |  |  | 586 |  |  |  | 42 |  |  |  | --- |  |  |  | 628 |
Corporate debt securities |  |  | 6,014 |  |  |  | --- |  |  |  | 295 |  |  |  | 5,719 |
Total securities available for sale |  | $ | 431,428 |  |  | $ | 1,709 |  |  | $ | 8,127 |  |  | $ | 425,010 |
Investments Classified by Contractual Maturity Date [Table Text Block] |
|  | September 30 , 201 9
|  | Amortized Cost |  | Fair Value
Available for S ale: |  |  |  |  |  |  |  |
Due in one year or less |  | $ | 61,522 |  |  | $ | 61,525 |
Due after one year through five years |  |  | 57,871 |  |  |  | 58,039 |
Due after five years through ten years |  |  | 90,075 |  |  |  | 90,903 |
Due after ten years |  |  | 121,044 |  |  |  | 123,683 |
Total securities available for sale |  | $ | 330,512 |  |  | $ | 334,150 |
Schedule of Temporary Impairment Losses, Investments [Table Text Block] |
|  | September 30, 2019
|  | Less Than 12 Months |  | 12 Months or More
|  | Fair Value |  | Unrealized Loss |  | Fair Value |  | Unrealized Loss
Temporarily Impaired Securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. Government agencies and corporations |  | $ | 27,231 |  |  | $ | 211 |  |  | $ | 71,778 |  |  | $ | 217 |
States and political subdivisions |  |  | --- |  |  |  | --- |  |  |  | 591 |  |  |  | 48 |
Mortgage-backed securities |  |  | 49,823 |  |  |  | 298 |  |  |  | --- |  |  |  | --- |
Total |  | $ | 77,054 |  |  | $ | 509 |  |  | $ | 72,369 |  |  | $ | 265 |
|  | December 31, 2018
|  | Less Than 12 Months |  | 12 Months or More
|  | Fair Value |  | Unrealized Loss |  | Fair Value |  | Unrealized Loss
Temporarily I mpaired S ecurities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. Government agencies and corporations |  | $ | 17,730 |  |  | $ | 216 |  |  | $ | 259,992 |  |  | $ | 6,450 |
States and political subdivisions |  |  | 16,882 |  |  |  | 352 |  |  |  | 20,758 |  |  |  | 814 |
Corporate debt securities |  |  | 4,842 |  |  |  | 194 |  |  |  | 876 |  |  |  | 101 |
Total |  | $ | 39,454 |  |  | $ | 762 |  |  | $ | 281,626 |  |  | $ | 7,365 |

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- Definition Tabular disclosure of available-for-sale securities which includes, but is not limited to, changes in the cost basis and fair value, fair value and gross unrealized gain (loss), fair values by type of security, contractual maturity and classification, amortized cost basis, contracts to acquire securities to be accounted for as available-for-sale, debt maturities, transfers to trading, change in net unrealized holding gain (loss) net of tax, continuous unrealized loss position fair value, aggregate losses qualitative disclosures, other than temporary impairment (OTTI) losses or other disclosures related to available for sale securities. + References No definition available. + Details
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- Definition Tabular disclosure of investments in an unrealized loss position for which other-than-temporary impairments have not been recognized in earnings (including investments for which a portion of an other-than-temporary impairment has been recognized in other comprehensive income), including: (a) the aggregate related fair value of investments with unrealized losses, (b) the aggregate amount of unrealized losses (that is, the amount by which amortized cost basis exceeds fair value). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=118939692&loc=d3e27290-111563 + Details
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