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Investment Securities (Unrealized Gain (Loss) on Investments) (Details) - USD ($) $ in Thousands | Mar. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Schedule of Investments [Line Items] |  |
Available-for-sale debt securities, Amortized Cost | $ 3,252 | $ 5,752
Available-for-sale debt securities, Unrealized Losses | 2 | 4
Available-for-sale debt securities, Fair Value | 3,250 | 5,748
Held-to-maturity debt securities, Amortized Cost | 130,560 | 128,292
Held-to-maturity debt securities, Unrealized Gains | 3,518 | 4,524
Held-to-maturity debt securities, Unrealized Losses | 559 | 22
Held-to-maturity debt securities, Fair Value | 133,519 | 132,794
Available-for-sale securities and Held-to-maturity debt securities, Amortized Cost | 133,812 | 134,044
Available-for-sale securities and Held-to-maturity debt securities, Unrealized Gains | 3,518 | 4,524
Available-for-sale securities and Held-to-maturity debt securities, Unrealized Losses | 561 | 26
Available-for-sale securities and Held-to-maturity debt securities, Fair Value | 136,769 | 138,542
U.S. Government Agencies [Member] |  |
Schedule of Investments [Line Items] |  |
Available-for-sale debt securities, Fair Value |  | 2
U.S. Treasury and U.S. government agencies [Member] |  |
Schedule of Investments [Line Items] |  |
Held-to-maturity debt securities, Amortized Cost | 16,980 | 11,511
Held-to-maturity debt securities, Unrealized Gains | 46 | 66
Held-to-maturity debt securities, Unrealized Losses | 420 |
Held-to-maturity debt securities, Fair Value | 16,606 | 11,577
Mortgage-backed U.S. Government Agencies [Member] |  |
Schedule of Investments [Line Items] |  |
Available-for-sale debt securities, Amortized Cost | 2 | 2
Available-for-sale debt securities, Fair Value | 2 | 2
Held-to-maturity debt securities, Amortized Cost | 35,727 | 40,810
Held-to-maturity debt securities, Unrealized Gains | 866 | 948
Held-to-maturity debt securities, Unrealized Losses | 3 | 15
Held-to-maturity debt securities, Fair Value | 36,590 | 41,743
State and political subdivision obligations [Member] |  |
Schedule of Investments [Line Items] |  |
Held-to-maturity debt securities, Amortized Cost | 65,335 | 65,449
Held-to-maturity debt securities, Unrealized Gains | 2,455 | 3,295
Held-to-maturity debt securities, Unrealized Losses | 53 | 6
Held-to-maturity debt securities, Fair Value | 67,737 | 68,738
Corporate debt securities [Member] |  |
Schedule of Investments [Line Items] |  |
Available-for-sale debt securities, Amortized Cost | 3,250 | 5,750
Available-for-sale debt securities, Unrealized Losses | 2 | 4
Available-for-sale debt securities, Fair Value | 3,248 | 5,746
Held-to-maturity debt securities, Amortized Cost | 12,518 | 10,522
Held-to-maturity debt securities, Unrealized Gains | 151 | 215
Held-to-maturity debt securities, Unrealized Losses | 83 | 1
Held-to-maturity debt securities, Fair Value | $ 12,586 | $ 10,736

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