Investments (Amortized Cost and Aggregate Fair Value of Debt Securities, by Contractual Maturity) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Investments [Abstract]
Available-for-sale Securities, Due in one year or less, Amortized Cost	$ 1,780
Available-for-sale Securities, Due in one year or less, Fair Value	1,814
Available-for-sale Securities, Due after one year through five years, Amortized Cost	15,706
Available-for-sale Securities, Due after one year through five years, Fair Value	16,864
Available-for-sale Securities, Due after five years through ten years, Amortized Cost	29,716
Available-for-sale Securities, Due after five years through ten years, Fair Value	30,374
Available-for-sale Securities, Due after ten years, Amortized Cost	37,339
Available-for-sale Securities, Due after ten years, Fair Value	38,155
Available-for-sale securities, Amortized Cost	84,541	79,074
Available-for-sale Securities, Fair Value	87,207
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	179
Held-to-maturity Securities, Due after one year through five years, Fair Value	188
Held-to-maturity Securities, Due after five years through ten years, Amortized Cost	145
Held-to-maturity Securities, Due after five years through ten years, Fair Value	157
Held-to-maturity Securities, Due after ten years, Amortized Cost	697
Held-to-maturity Securities, Due after ten years, Fair Value	719
Held-to-maturity Securities, Amortized Cost	1,021	812
Held-to-maturity Securities, Fair Value	$ 1,064	$ 853