Investment Securities (Amortized Cost and Estimated Fair Value by Maturity Date) (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Investment Securities [Abstract]
Available for sale, Amortized Cost, Due in one year or less	$ 5,996
Available for sale, Amortized Cost, Due after one year through five years	28,874
Available for sale, Amortized Cost, Due after five years through ten years	59,748
Available for sale, Amortized Cost, Due after ten years	51,027
Available-for-sale securities, Amortized Cost	145,645	$ 158,447
Available for sale, Estimated Fair Value, Due in one year or less	5,978
Available for sale, Estimated Fair Value, Due after one year through five years	28,780
Available for sale, Estimated Fair Value, Due after five years through ten years	59,787
Available for sale, Estimated Fair Value, Due after ten years	50,865
Available-for-sale Securities, Debt Securities, Total	145,410	154,432
Held to maturity securities, Amortized Cost, Due in one year or less	500
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	3,501
Held to maturity securities, Amortized Cost, Due after ten years	1,504
Held-to-maturity Securities, Amortized Cost	5,905	6,043
Held to maturity securities, Estimated Fair Value, Due in one year or less	503
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	3,469
Held to maturity securities, Estimated Fair Value, Due after ten years	1,514
Held-to-maturity Securities, Fair Value, Total	$ 5,887	$ 6,000