Investment Securities (Amortized Cost and Estimated Fair Value by Maturity Date) (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Investment Securities [Abstract]
Available for sale, Amortized Cost, Due in one year or less	$ 75
Available for sale, Amortized Cost, Due after one year through five years	6,658
Available for sale, Amortized Cost, Due after five years through ten years	42,689
Available for sale, Amortized Cost, Due after ten years	46,577
Available-for-sale securities, Amortized Cost	95,999	$ 116,906
Available for sale, Estimated Fair Value, Due in one year or less	74
Available for sale, Estimated Fair Value, Due after one year through five years	6,351
Available for sale, Estimated Fair Value, Due after five years through ten years	37,856
Available for sale, Estimated Fair Value, Due after ten years	39,306
Available-for-sale Securities, Debt Securities, Total	83,587	116,982
Held to maturity securities, Amortized Cost, Due in one year or less	2,117
Held to maturity securities, Amortized Cost, Due after one year through five years	108,632
Held to maturity securities, Amortized Cost, Due after five years through ten years	73,054
Held to maturity securities, Amortized Cost, Due after ten years	375,652
Held-to-maturity Securities, Amortized Cost	559,455	404,594
Held to maturity securities, Estimated Fair Value, Due in one year or less	2,076
Held to maturity securities, Estimated Fair Value, Due after one year through five years	101,165
Held to maturity securities, Estimated Fair Value, Due after five years through ten years	66,502
Held to maturity securities, Estimated Fair Value, Due after ten years	324,884
Held-to-maturity Securities, Fair Value, Total	$ 494,627	$ 401,524