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Note 4 - Securities - Amortized Cost and Fair Value of Contractual Securities (Details) - USD ($) $ in Thousands | Jun. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Due within one year, amortized cost | $ 268,240 | $ 223,145 |
Due within one year, fair value | 268,438 | 223,477 |
Due from one to five years, amortized cost | 505,309 | 478,868 |
Due from one to five years, fair value | 505,923 | 475,985 |
Due from five to ten years, amortized cost | 276,806 | 258,611 |
Due from five to ten years, fair value | 261,360 | 240,114 |
Due after ten years, amortized cost | 14,403 | 3,000 |
Due after ten years, fair value | 13,979 | 2,550 |
Mortgage-backed securities, amortized cost | 187,193 | 243,435 |
Mortgage-backed securities, fair value | 178,151 | 219,274 |
Available for sale, amortized cost | 1,251,951 | 1,207,059 |
Available for sale, fair value | 1,227,851 | 1,161,400 | [1]
Held to maturity debt securities, Due within one year | 853 | 250 |
Held to maturity debt securities, Due within one year, fair value | 847 | 250 |
Held to maturity debt securities, Due from one to five years | 257,005 | 256,743 |
Held to maturity debt securities, Due from one to five years, fair value | 243,237 | 236,586 |
Held to maturity debt securities, Due from five to ten years | 0 | 495 |
Held to maturity debt securities, Due from five to ten years, fair value | 0 | 431 |
Mortgage-backed securities, amortized cost | 428,794 | 457,365 |
Mortgage-backed securities, fair value | 386,021 | 402,229 |
Held to maturity, amortized cost | 686,652 | 714,853 |
Held to maturity debt securities, fair value | $ 630,105 | $ 639,496 |
[1] | Derived from audited financial statements.

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