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Note 3 - Investment Securities - Scheduled Maturities (Details) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Due in one year or less, amortized cost | $ 5,453 |
Due in one year or less, fair value | 5,451 |
Due after one year through five years, amortized cost | 4,106 |
Due after one year through five years, fair value | 4,082 |
Due after five years through ten years, amortized cost | 2,247 |
Due after five years through ten years, fair value | 2,244 |
Due after ten years, amortized cost | 209,003 |
Due after ten years, fair value | 184,183 |
Total securities available-for-sale, amortized cost | 721,799 | $ 535,182
Total securities available-for-sale, fair value | 634,884 | 534,507
Residential Mortgage-Backed Securities [Member] |  |
Securities available-for-sale, without single maturity date, amortized cost | 475,263 |
Securities available-for-sale, without single maturity date, fair value | 417,578 |
Total securities available-for-sale, amortized cost | 475,263 | 317,111
Total securities available-for-sale, fair value | 417,578 | 316,095
Commercial Mortgage-Backed Securities [Member] |  |
Securities available-for-sale, without single maturity date, amortized cost | 25,485 |
Securities available-for-sale, without single maturity date, fair value | 21,104 |
Total securities available-for-sale, amortized cost | 25,485 | 10,814
Total securities available-for-sale, fair value | 21,104 | 10,469
Other Debt Obligations [Member] |  |
Securities available-for-sale, without single maturity date, amortized cost | 242 |
Securities available-for-sale, without single maturity date, fair value | 242 |
Total securities available-for-sale, amortized cost | 242 | 195
Total securities available-for-sale, fair value | $ 242 | $ 195

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