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Note 4 - Investment Securities - Securities by Contractual Maturity (Details) - USD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Due within one year, AFS, amortized cost | $ 128,053 |
Due within one year, AFS, fair value | 124,318 |
Due within one year, HTM, carrying value | 50,069 |
Due within one year, HTM, fair value | 49,647 |
Due after one year but within five years, AFS, amortized cost | 36,480 |
Due after one year but within five years, AFS, fair value | 34,673 |
Due after one year but within five years, HTM, carrying value | 153,931 |
Due after one year but within five years, HTM, fair value | 149,393 |
Due after five years but within 10 years, AFS, amortized cost | 81,862 |
Due after five years but within 10 years, AFS, fair value | 72,415 |
Due after five years but within 10 years, HTM, carrying value | 25,633 |
Due after five years but within 10 years, HTM, fair value | 23,214 |
Due after 10 years, AFS, amortized cost | 118,613 |
Due after 10 years, AFS, fair value | 111,734 |
Due after 10 years, HTM, carrying value | 544 |
Due after 10 years, HTM, fair value | 534 |
Mortgage-backed securities – government agencies, AFS, amortized cost | 789,145 |
Mortgage-backed securities – government agencies, AFS, fair value | 688,039 |
Mortgage backed securities - government agencies, HTM, carrying value | 209,660 |
Mortgage backed securities - government agencies, HTM, fair value | 185,731 |
Total available for sale debt securities, amortized cost | 1,154,153 | $ 1,297,977
Total available for sale debt securities, fair value | 1,031,179 | 1,144,617
Total held to maturity debt securities, carrying value | 439,837 |
Total held to maturity debt securities, fair value | $ 408,519 | $ 431,833

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