Investments (Held-to-Maturity Securities) (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	$ 2,370	$ 2,439
Held-to-maturity securities, unrealized gains	105	65
Held-to-maturity securities, unrealized losses	0	0
Fair Value	2,475	2,504
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	2,332	2,395
Held-to-maturity securities, unrealized gains	102	62
Held-to-maturity securities, unrealized losses	0	0
Fair Value	2,434	2,457
US Treasury Securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	38	44
Held-to-maturity securities, unrealized gains	3	3
Held-to-maturity securities, unrealized losses	0	0
Fair Value	$ 41	$ 47