Investments (Held-to-Maturity Securities) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	$ 2,767	$ 3,108
Held-to-maturity securities, unrealized gains	138	74
Held-to-maturity securities, unrealized losses	0	0
Fair Value	2,905	3,182
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	2,708	2,818
Held-to-maturity securities, unrealized gains	134	69
Held-to-maturity securities, unrealized losses	0	0
Fair Value	2,842	2,887
US Treasury Securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	59	290
Held-to-maturity securities, unrealized gains	4	5
Held-to-maturity securities, unrealized losses	0	0
Fair Value	$ 63	$ 295