Investment Securities (Amortized Cost and Estimated Fair Values of Securities) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Schedule of Available-for-sale Securities [Line Items]
Available for sale, Amortized Cost, Total	$ 116,906	$ 137,465
Available-for-sale, Pledged available-for-sale securities, Estimated Fair Value	4,159	3,626
Held-to-Maturity, Amortized cost	404,594	65,706
Held-to-maturity securities, Estimated Fair Value, Total	401,524	65,828
Collateral Pledged [Member]
Schedule of Available-for-sale Securities [Line Items]
Available for sale, Amortized Cost, Total	78,522	60,600
Available-for-sale, Pledged available-for-sale securities, Estimated Fair Value	78,352	$ 61,094
Held-to-Maturity, Amortized cost	913
Held-to-maturity securities, Estimated Fair Value, Total	$ 915