Investments - Available-for-sale Fixed Maturity Securities by Contractual Maturity (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Amortized Cost
Due in one year or less	$ 6,020
Due after one year through five years	36,208
Due after five years through ten years	7,979
Due after ten years	8,841
Securities with contractual maturities	59,048
Commercial mortgage and asset backed	48,165
Total fixed maturity securities available for sale	107,213	$ 83,768
Estimated Fair Value
Due in one year or less	6,025
Due after one year through five years	36,112
Due after five years through ten years	7,979
Due after ten years	8,960
Securities with contractual maturities	59,076
Commercial mortgage and asset backed	48,017
Fixed maturity securities, Estimated Fair Value	$ 107,093	$ 84,405