Investment Securities (Investments Classified by Contractual Maturity Date) (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Investment Securities [Abstract]
Held to Maturity, Due in one year or less, Amortized Cost	$ 1,000
Held to Maturity, Due after one year through five years, Amortized Cost	22,277
Held to Maturity, Due after five years through ten years, Amortized Cost	29,384
Held to Maturity, Due after ten years, Amortized Cost	9,408
Held-to-maturity Securities, Amortized Cost	62,069	$ 62,390
Held to Maturity, Due in one year or less, Fair Value	999
Held to Maturity, Due after one year through five years, Fair Value	22,264
Held to Maturity, Due after five years through ten years, Fair Value	28,449
Held to Maturity, Due after ten years, Fair Value	8,591
Held-to-maturity, Total investment securities, Fair Value	60,303	62,420
Available for Sale, Due in one year or less, Amortized Cost	32,757
Available for Sale, Due after one year through five years, Amortized Cost	24,443
Available for Sale, Due after five years through ten years, Amortized Cost	20,482
Available for Sale, Due after ten years, Amortized Cost	24,663
Available-for-sale Securities, Amortized Cost	102,345	113,555
Available for Sale, Due in one year or less, Fair Value	32,609
Available for Sale, Due after one year through five years, Fair Value	23,925
Available for Sale, Due after five years through ten years, Fair Value	19,498
Available for Sale, Due after ten years, Fair Value	23,129
Available for Sale, Total investment securities, Fair Value	$ 99,161	$ 111,783