Investments (Amortized Cost and Aggregate Fair Value of Debt Securities, by Contractual Maturity) (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Investments [Abstract]
Available-for-sale Securities, Due in one year or less, Amortized Cost	$ 808
Available-for-sale Securities, Due in one year or less, Fair Value	813
Available-for-sale Securities, Due after one year through five years, Amortized Cost	13,319
Available-for-sale Securities, Due after one year through five years, Fair Value	14,014
Available-for-sale Securities, Due after five years through ten years, Amortized Cost	28,913
Available-for-sale Securities, Due after five years through ten years, Fair Value	29,116
Available-for-sale Securities, Due after ten years, Amortized Cost	41,916
Available-for-sale Securities, Due after ten years, Fair Value	42,705
Available-for-sale securities, Amortized Cost	84,956	$ 84,024
Available-for-sale Securities, Fair Value	86,648
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	117
Held-to-maturity Securities, Due after one year through five years, Fair Value	122
Held-to-maturity Securities, Due after five years through ten years, Amortized Cost	120
Held-to-maturity Securities, Due after five years through ten years, Fair Value	132
Held-to-maturity Securities, Due after ten years, Amortized Cost	2,412
Held-to-maturity Securities, Due after ten years, Fair Value	2,470
Held-to-maturity Securities, Amortized Cost	2,649	3,108
Held-to-maturity Securities, Fair Value	$ 2,724	$ 3,182