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Investment Securities (Amortized Cost and Fair Values Classified by Contractual Maturity Date) (Details) - USD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018
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Schedule of Investments [Line Items] |  |
Amortized Cost: Due after one year through five years | $ 19,457 |
Amortized Cost: Due after five years through ten years | 25,245 |
Amortized Cost: Due after ten years | 27,852 |
Amortized Cost, Single Maturity Date, Total | 72,554 |
Fair Value: Due after one year through five years | 19,485 |
Fair Value: Due after five years through ten years | 25,170 |
Fair Value: Due after ten years | 24,063 |
Fair Value: Single Maturity Date, Total | 68,718 |
Available-for-sale Securities, Amortized Cost Basis | 135,008 | $ 144,123
Available-for-sale Securities | 131,305 | 137,641
Amortized Cost: Due after one through five years, Held to maturity | 16,164 |
Amortized Cost: Due after ten years, Held to maturity | 16,215 |
Amortized Cost: Total, Held to maturity | 32,379 |
Fair Value: Due after one through five years, Held to maturity | 16,823 |
Fair Value: Due after ten years, Held to maturity | 21,572 |
Fair Value: Total, Held to maturity | 38,395 |
Held-to-maturity Securities | 93,979 | 94,010
Held-to-maturity Securities, Fair Value | 100,656 | 93,760
Residential mortgage-backed agencies [Member] |  |
Schedule of Investments [Line Items] |  |
Available-for-sale Securities, Amortized Cost Basis | 4,917 |
Available-for-sale Securities | 4,900 |
Held-to-maturity Securities | 42,939 | 46,491
Held-to-maturity Securities, Fair Value | 43,253 | 45,210
Commercial mortgage-backed agencies [Member] |  |
Schedule of Investments [Line Items] |  |
Available-for-sale Securities, Amortized Cost Basis | 27,634 | 39,013
Available-for-sale Securities | 27,764 | 37,752
Held-to-maturity Securities | 15,521 | 15,821
Held-to-maturity Securities, Fair Value | 15,865 | 15,828
Collateralized mortgage obligations [Member] |  |
Schedule of Investments [Line Items] |  |
Available-for-sale Securities, Amortized Cost Basis | 29,903 | 36,669
Available-for-sale Securities | 29,923 | 35,704
Held-to-maturity Securities | 3,140 | 3,761
Held-to-maturity Securities, Fair Value | $ 3,143 | $ 3,605

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