Investment Securities (Amortized Cost and Estimated Fair Value by Maturity Date) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Investment Securities [Abstract]
Available for sale, Amortized Cost, Due in one year or less	$ 14,012
Available for sale, Amortized Cost, Due after one year through five years	10,449
Available for sale, Amortized Cost, Due after five years through ten years	52,894
Available for sale, Amortized Cost, Due after ten years	45,137
Available-for-sale securities, Amortized Cost	122,492	$ 158,447
Available for sale, Estimated Fair Value, Due in one year or less	14,005
Available for sale, Estimated Fair Value, Due after one year through five years	10,423
Available for sale, Estimated Fair Value, Due after five years through ten years	53,153
Available for sale, Estimated Fair Value, Due after ten years	45,210
Debt Securities, Available-for-sale, Maturity, without Single Maturity Date, Fair Value	122,791
Available-for-sale Securities, Debt Securities, Total	122,791	154,432
Held to maturity securities, Amortized Cost, Due after one year through five years	400
Held to maturity securities, Amortized Cost, Due after five years through ten years	7,000
Held to maturity securities, Amortized Cost, Due after ten years	1,386
Debt Securities, Held-to-maturity, Maturity, without Single Maturity Date, Amortized Cost	8,786
Held-to-maturity Securities, Amortized Cost	8,786	6,043
Held to maturity securities, Estimated Fair Value, Due after one year through five years	401
Held to maturity securities, Estimated Fair Value, Due after five years through ten years	6,872
Held to maturity securities, Estimated Fair Value, Due after ten years	1,381
Debt Securities, Held-to-maturity, Maturity, without Single Maturity Date, Fair Value	8,654
Held-to-maturity Securities, Fair Value, Total	$ 8,654	$ 6,000