Investments, Fixed Maturities by Contractual Maturities (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Carrying Value [Abstract]
Due in one year or less	$ 1,653	$ 2,544
Due after one year through five years	13,738	20,278
Due after five years through ten years	112,847	90,667
Due after ten years	67,328	80,099
Varying maturities	19,542	17,082
Totals	215,108	210,670
Amortized Cost [Abstract]
Due in one year or less	1,655	2,507
Due after one year through five years	14,056	20,038
Due after five years through ten years	112,116	90,926
Due after ten years	64,928	79,627
Varying maturities	19,789	17,407
Cost or amortized cost	$ 212,544	$ 210,505