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Note 4 - Investment Securities - Scheduled Maturities (Details) - USD ($) $ in Thousands | Jun. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Due in one year or less, amortized cost | $ 5,034 |
Due in one year or less, fair value | 5,036 |
Due after one year through five years, amortized cost | 24,943 |
Due after one year through five years, fair value | 25,155 |
Due after five years through ten years, amortized cost | 61,846 |
Due after five years through ten years, fair value | 61,209 |
Due after ten years, amortized cost | 509,628 |
Due after ten years, fair value | 480,961 |
Total investment securities available-for-sale, amortized cost | 1,309,724 | $ 708,437
Total investment securities available-for-sale, fair value | 1,227,200 | 612,847
Residential Mortgage-Backed Securities [Member] |  |
Securities available-for-sale, without single maturity date, amortized cost | 677,879 |
Securities available-for-sale, without single maturity date, fair value | 628,139 |
Total investment securities available-for-sale, amortized cost | 677,879 | 439,445
Total investment securities available-for-sale, fair value | 628,139 | 378,838
Commercial Mortgage-Backed Securities [Member] |  |
Securities available-for-sale, without single maturity date, amortized cost | 30,266 |
Securities available-for-sale, without single maturity date, fair value | 26,572 |
Total investment securities available-for-sale, amortized cost | 30,266 | 24,989
Total investment securities available-for-sale, fair value | 26,572 | 20,892
Other Debt Obligations [Member] |  |
Securities available-for-sale, without single maturity date, amortized cost | 128 |
Securities available-for-sale, without single maturity date, fair value | 128 |
Total investment securities available-for-sale, amortized cost | 128 | 171
Total investment securities available-for-sale, fair value | $ 128 | $ 171

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