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Investment Securities - Contractual maturities (Details) - USD ($) $ in Thousands | Mar. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Amortized Cost |  |
Due after 1 Year through 5 Years | $ 690 |
Due after 10 Years | 61,606 |
Amortized Cost | 62,296 | $ 76,805
Fair Value |  |
Due after 1 Year through 5 Years | 677 |
Due after 10 Years | 53,097 |
Total Fair Value | $ 53,774 | $ 67,901

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