Investment Securities (Amortized Cost and Estimated Fair Value by Maturity Date) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Investment Securities [Abstract]
Available for sale, Amortized Cost, Due in one year or less	$ 115
Available for sale, Amortized Cost, Due after one year through five years	1,041
Available for sale, Amortized Cost, Due after five years through ten years	60,169
Available for sale, Amortized Cost, Due after ten years	55,581
Available-for-sale securities, Amortized Cost	116,906	$ 137,465
Available for sale, Estimated Fair Value, Due in one year or less	119
Available for sale, Estimated Fair Value, Due after one year through five years	1,067
Available for sale, Estimated Fair Value, Due after five years through ten years	60,656
Available for sale, Estimated Fair Value, Due after ten years	55,140
Debt Securities, Available-for-sale, Maturity, without Single Maturity Date, Fair Value	116,982
Available-for-sale Securities, Debt Securities, Total	116,982	139,568
Held to maturity securities, Amortized Cost, Due in one year or less	2,913
Held to maturity securities, Amortized Cost, Due after one year through five years	20,607
Held to maturity securities, Amortized Cost, Due after five years through ten years	96,799
Held to maturity securities, Amortized Cost, Due after ten years	284,275
Debt Securities, Held-to-maturity, Maturity, without Single Maturity Date, Amortized Cost	404,594
Held-to-maturity Securities, Amortized Cost	404,594	65,706
Held to maturity securities, Estimated Fair Value, Due in one year or less	2,934
Held to maturity securities, Estimated Fair Value, Due after one year through five years	20,512
Held to maturity securities, Estimated Fair Value, Due after five years through ten years	95,902
Held to maturity securities, Estimated Fair Value, Due after ten years	282,176
Debt Securities, Held-to-maturity, Maturity, without Single Maturity Date, Fair Value	401,524
Held-to-maturity Securities, Fair Value, Total	$ 401,524	$ 65,828