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Note 4 - Securities - Estimated Fair Value of Available for Sale Securities, by Contractual Maturity (Details) - USD ($) $ in Thousands | Sep. 30, 2022 | Dec. 31, 2021
--- | --- | ---
Due in one year or less, cost basis | $ 190 |
Available for sale securities, due in one year or less, estimated fair value | 190 |
Due from one to five years, cost basis | 1,978 |
Available for sale securities, due from one to five years, estimated fair value | 1,972 |
Due from five to ten years, cost basis | 21,124 |
Available for sale securities, due from five to ten years, estimated fair value | 18,207 |
Due over ten years, cost basis | 270,160 |
Available for sale securities, due over ten years, estimated fair value | 201,385 |
Collateralized mortgage obligations and residential mortgage-backed securities, cost basis | 166,651 |
Collateralized mortgage obligations and residential mortgage-backed securities, estimated fair value | 137,281 |
Debt Securities, Available-for-sale, Amortized Cost, Total | 460,103 | $ 521,485
Total securities available-for-sale | $ 359,035 | $ 526,889

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