Investment Securities (Amortized Cost and Estimated Fair Value by Maturity Date) (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Investment Securities [Abstract]
Available for sale, Amortized Cost, Due in one year or less	$ 5,999
Available for sale, Amortized Cost, Due after one year through five years	28,660
Available for sale, Amortized Cost, Due after five years through ten years	56,236
Available for sale, Amortized Cost, Due after ten years	47,948
Available-for-sale securities, Amortized Cost	138,843	$ 158,447
Available for sale, Estimated Fair Value, Due in one year or less	5,994
Available for sale, Estimated Fair Value, Due after one year through five years	28,581
Available for sale, Estimated Fair Value, Due after five years through ten years	56,373
Available for sale, Estimated Fair Value, Due after ten years	47,963
Available-for-sale Securities, Debt Securities, Total	138,911	154,432
Held to maturity securities, Amortized Cost, Due in one year or less	1,000
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	1,380
Held-to-maturity Securities, Amortized Cost	9,780	6,043
Held to maturity securities, Estimated Fair Value, Due in one year or less	1,000
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	6,922
Held to maturity securities, Estimated Fair Value, Due after ten years	1,392
Held-to-maturity Securities, Fair Value, Total	$ 9,715	$ 6,000