Investment Securities Debt Securities by Contactual Maturity (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Available-for-sale
Due in one year or less, Amortized Cost	$ 680
Due from one to five years, Amortized Cost	3,767
Due from five to ten years, Amortized Cost	16,655
Due after ten years, Amortized Cost	19,540
Debt securities with single maturity date, Amortized Cost	40,642
Agency MBS, Amortized Cost	45,503
Total debt securities available-for-sale, Amortized Cost	86,145	$ 74,698
Due in one year or less, Fair Value	688
Due from one to five years, Fair Value	3,923
Due from five to ten years, Fair Value	17,019
Due after ten years, Fair Value	19,739
Debt securities with single maturity date, Fair Value	41,369
Agency MBS, Fair Value	46,024
Total debt securities available-for-sale, Fair Value	$ 87,393	$ 73,405