Investment Securities (Amortized Cost and Estimated Fair Value by Maturity Date) (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Investment Securities [Abstract]
Available for sale, Amortized Cost, Due in one year or less	$ 37
Available for sale, Amortized Cost, Due after one year through five years	5,220
Available for sale, Amortized Cost, Due after five years through ten years	46,385
Available for sale, Amortized Cost, Due after ten years	48,162
Available-for-sale securities, Amortized Cost	99,804	$ 116,906
Available for sale, Estimated Fair Value, Due in one year or less	37
Available for sale, Estimated Fair Value, Due after one year through five years	5,009
Available for sale, Estimated Fair Value, Due after five years through ten years	41,112
Available for sale, Estimated Fair Value, Due after ten years	40,189
Available-for-sale Securities, Debt Securities, Total	86,347	116,982
Held to maturity securities, Amortized Cost, Due in one year or less	2,109
Held to maturity securities, Amortized Cost, Due after one year through five years	91,463
Held to maturity securities, Amortized Cost, Due after five years through ten years	92,329
Held to maturity securities, Amortized Cost, Due after ten years	384,818
Held-to-maturity Securities, Amortized Cost	570,719	404,594
Held to maturity securities, Estimated Fair Value, Due in one year or less	2,053
Held to maturity securities, Estimated Fair Value, Due after one year through five years	86,186
Held to maturity securities, Estimated Fair Value, Due after five years through ten years	83,352
Held to maturity securities, Estimated Fair Value, Due after ten years	329,554
Held-to-maturity Securities, Fair Value, Total	$ 501,145	$ 401,524