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Investment Securities - Maturity Dates Of Available-For-Sale Securities (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Cost |  |
Due after 5 years through year 10 | $ 236 | $ 278
Due after 10 years | 170 | 276
Mortgage-backed securities with original maturities of 30 years | 133 | 164
Investment securities with no maturity dates | 36,680 | 30,221
Total | 37,219 | 30,939
Fair Value |  |
Due after 5 years through year 10 | 236 | 277
Due after 10 years | 171 | 272
Mortgage-backed securities with original maturities of 30 years | 138 | 174
Investment securities with no maturity dates | 36,728 | 29,737
Total | $ 37,273 | $ 30,460

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