Investments (Amortized Cost and Aggregate Fair Value of Debt Securities, by Contractual Maturity) (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Investments [Abstract]
Available-for-sale Securities, Due in one year or less, Amortized Cost	$ 726
Available-for-sale Securities, Due in one year or less, Fair Value	743
Available-for-sale Securities, Due after one year through five years, Amortized Cost	13,251
Available-for-sale Securities, Due after one year through five years, Fair Value	13,217
Available-for-sale Securities, Due after five years through ten years, Amortized Cost	34,082
Available-for-sale Securities, Due after five years through ten years, Fair Value	33,294
Available-for-sale Securities, Due after ten years, Amortized Cost	44,018
Available-for-sale Securities, Due after ten years, Fair Value	44,558
Available-for-sale securities, Amortized Cost	92,077	$ 84,024
Available-for-sale Securities, Fair Value	91,812
Held-to-maturity Securities, Due in one year or less, Amortized Cost	0
Held-to-maturity Securities, Due in one year or less, Fair Value	0
Held-to-maturity Securities, Due after one year through five years, Amortized Cost	82
Held-to-maturity Securities, Due after one year through five years, Fair Value	85
Held-to-maturity Securities, Due after five years through ten years, Amortized Cost	106
Held-to-maturity Securities, Due after five years through ten years, Fair Value	115
Held-to-maturity Securities, Due after ten years, Amortized Cost	2,251
Held-to-maturity Securities, Due after ten years, Fair Value	2,304
Held-to-maturity Securities, Amortized Cost	2,439	3,108
Held-to-maturity Securities, Fair Value	$ 2,504	$ 3,182