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Investment Securities (Amortized Cost and Estimated Fair Value by Maturity Date) (Details) - USD ($) $ in Thousands | Jun. 30, 2023 | Dec. 31, 2022 | Jun. 30, 2022
--- | --- | --- | ---
Investment Securities [Abstract] |  |  |
Available for sale, Amortized Cost, Due in one year or less | $ 30 |  |
Available for sale, Amortized Cost, Due after one year through five years | 8,771 |  |
Available for sale, Amortized Cost, Due after five years through ten years | 36,753 |  |
Available for sale, Amortized Cost, Due after ten years | 44,292 |  |
Available-for-sale securities, Amortized Cost | 89,846 | $ 95,999 |
Available for sale, Estimated Fair Value, Due in one year or less | 30 |  |
Available for sale, Estimated Fair Value, Due after one year through five years | 8,345 |  |
Available for sale, Estimated Fair Value, Due after five years through ten years | 32,325 |  |
Available for sale, Estimated Fair Value, Due after ten years | 37,369 |  |
Available-for-sale Securities, Debt Securities, Total | 78,069 | 83,587 |
Held to maturity securities, Amortized Cost, Due in one year or less | 1,019 |  |
Held to maturity securities, Amortized Cost, Due after one year through five years | 123,636 |  |
Held to maturity securities, Amortized Cost, Due after five years through ten years | 58,643 |  |
Held to maturity securities, Amortized Cost, Due after ten years | 353,835 |  |
Held-to-maturity Securities, Amortized Cost | 537,133 | 559,455 |
Held to maturity securities, Estimated Fair Value, Due in one year or less | 1,009 |  |
Held to maturity securities, Estimated Fair Value, Due after one year through five years | 114,964 |  |
Held to maturity securities, Estimated Fair Value, Due after five years through ten years | 52,809 |  |
Held to maturity securities, Estimated Fair Value, Due after ten years | 304,514 |  |
Held-to-maturity Securities, Fair Value, Total | $ 473,296 | $ 494,627 | $ 494,627

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