Investment Securities (Amortized Cost and Estimated Fair Value by Maturity Date) (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Investment Securities [Abstract]
Available for sale, Amortized Cost, Due in one year or less	$ 4,999
Available for sale, Amortized Cost, Due after one year through five years	1,393
Available for sale, Amortized Cost, Due after five years through ten years	57,061
Available for sale, Amortized Cost, Due after ten years	74,012
Available-for-sale securities, Amortized Cost	137,465	$ 122,492
Available for sale, Estimated Fair Value, Due in one year or less	5,015
Available for sale, Estimated Fair Value, Due after one year through five years	1,431
Available for sale, Estimated Fair Value, Due after five years through ten years	58,419
Available for sale, Estimated Fair Value, Due after ten years	74,703
Debt Securities, Available-for-sale, Maturity, without Single Maturity Date, Fair Value	139,568
Available-for-sale Securities, Debt Securities, Total	139,568	122,791
Held to maturity securities, Amortized Cost, Due after one year through five years	2,944
Held to maturity securities, Amortized Cost, Due after five years through ten years	27,728
Held to maturity securities, Amortized Cost, Due after ten years	35,034
Debt Securities, Held-to-maturity, Maturity, without Single Maturity Date, Amortized Cost	65,706
Held-to-maturity Securities, Amortized Cost	65,706	8,786
Held to maturity securities, Estimated Fair Value, Due after one year through five years	2,957
Held to maturity securities, Estimated Fair Value, Due after five years through ten years	27,818
Held to maturity securities, Estimated Fair Value, Due after ten years	35,053
Debt Securities, Held-to-maturity, Maturity, without Single Maturity Date, Fair Value	65,828
Held-to-maturity Securities, Fair Value, Total	$ 65,828	$ 8,654