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Investment Securities - Investments Classified by Contractual Maturity Date (Details) - USD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Amortized Cost |  |
Due in 1 year or less | $ 12,494 |
Due after 1 year but within 5 years | 32,400 |
Due after 5 years but within 10 years | 29,474 |
Due after 10 years | 2,334 |
Available-for-sale securities, amortized cost basis, Total | 76,702 |
Amortized Cost | 245,886 | $ 262,342
Fair Value |  |
Due in 1 year or less | 12,340 |
Due after 1 year but within 5 years | 30,977 |
Due after 5 years but within 10 years | 25,614 |
Due after 10 years | 1,941 |
Available-for-sale securities, fair value, Total | 70,872 |
Available for Sale Securities, Fair Value | 223,555 | 237,878
Amortized Cost |  |
Due in 1 year or less | 9,708 |
Due after 1 year but within 5 years | 130,686 |
Due after 5 years but within 10 years | 191,793 |
Due after 10 years | 23,123 |
Held-to-maturity securities, amortized cost | 355,310 |
Amortized Cost | 399,128 | 399,494
Held-to-maturity |  |
Due in 1 year or less | 9,627 |
Due after 1 year but within 5 years | 123,005 |
Due after 5 years but within 10 years | 166,811 |
Due after 10 years | 19,783 |
Held-to-maturity securities, fair value | 319,226 |
Held to maturity, fair value | 357,521 | $ 348,505
Mortgage-backed securities |  |
Amortized Cost |  |
Mortgage-backed securities | 169,184 |
Fair Value |  |
Mortgage-backed securities | 152,683 |
Amortized Cost |  |
Mortgage-backed securities | 43,818 |
Held-to-maturity |  |
Mortgage-backed securities | $ 38,295 |

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