Investments Fixed Maturities by Contractual Maturity Periods (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Schedule of Held-to-maturity Securities [Line Items]
Due In One Year or Less, Amortized Cost	$ 7,518
Due In One Year or Less, Fair Value	7,504
Due After One Year Through Five Years, Amortized Cost	40,198
Due After One Year Through Five Years, Fair Value	40,077
Due After Five Year Through Ten Years, Amortized Cost	3,107
Due After Five Year Through Ten Years, Fair Value	3,082
Due After Ten Years, Amortized Cost	6,349
Due After Ten Years, Fair Value	6,302
Fixed maturities, cost	57,172	$ 62,136
Estimated Fair Value, Fixed Maturities	$ 56,965	$ 61,764