Investment Securities (Amortized Cost and Estimated Fair Value by Maturity Date) (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Investment Securities [Abstract]
Available for sale, Amortized Cost, Due after one year through five years	$ 975
Available for sale, Amortized Cost, Due after five years through ten years	54,955
Available for sale, Amortized Cost, Due after ten years	57,193
Available-for-sale securities, Amortized Cost	113,123	$ 137,465
Available for sale, Estimated Fair Value, Due after one year through five years	1,009
Available for sale, Estimated Fair Value, Due after five years through ten years	55,891
Available for sale, Estimated Fair Value, Due after ten years	57,057
Available-for-sale Securities, Debt Securities, Total	113,957	139,568
Held to maturity securities, Amortized Cost, Due in one year or less	2,529
Held to maturity securities, Amortized Cost, Due after one year through five years	10,381
Held to maturity securities, Amortized Cost, Due after five years through ten years	57,481
Held to maturity securities, Amortized Cost, Due after ten years	128,493
Held-to-maturity Securities, Amortized Cost	198,884	65,706
Held to maturity securities, Estimated Fair Value, Due in one year or less	2,574
Held to maturity securities, Estimated Fair Value, Due after one year through five years	10,392
Held to maturity securities, Estimated Fair Value, Due after five years through ten years	57,456
Held to maturity securities, Estimated Fair Value, Due after ten years	127,569
Held-to-maturity Securities, Fair Value, Total	$ 197,991	$ 65,828