Investments (Held-to-Maturity Securities) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	$ 3,108	$ 812
Held-to-maturity securities, unrealized gains	74	41
Held-to-maturity securities, unrealized losses	0	0
Fair Value	3,182	853
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	2,818	706
Held-to-maturity securities, unrealized gains	69	34
Held-to-maturity securities, unrealized losses	0	0
Fair Value	2,887	740
US Treasury Securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	290	106
Held-to-maturity securities, unrealized gains	5	7
Held-to-maturity securities, unrealized losses	0	0
Fair Value	$ 295	$ 113