Investment Securities (Securities by Contractual Maturity) (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Amortized Cost
Due in one year or less	$ 3,667
Due after one year through five years	32,156
Due after five years through ten years	28,267
Due after ten years	68,070
Amortized Cost	132,160	$ 106,029
Fair Value
Due in one year or less	3,665
Due after one year through five years	31,753
Due after five years through ten years	27,873
Due after ten years	66,784
Total	$ 130,075	105,458
Yield
Due in one year or less	2.04%
Due after one year through five years	2.70%
Due after five years through ten years	2.93%
Due after ten years	2.78%
Total	2.77%
Carrying Value
Due in one year or less	$ 19,267
Due after one year through five years	16,540
Due after five years through ten years	21,110
Due after ten years	38,405
Carrying Value	95,322	110,267
Fair Value
Due in one year or less	19,312
Due after one year through five years	16,974
Due after five years through ten years	21,035
Due after ten years	38,349
Total	$ 95,670	$ 111,865
Yield
Due in one year or less	2.35%
Due after one year through five years	3.99%
Due after five years through ten years	3.04%
Due after ten years	3.06%
Total	3.07%