Investments, Fixed Maturities by Contractual Maturities (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Carrying Value [Abstract]
Due in one year or less	$ 3,900	$ 1,653
Due after one year through five years	18,131	13,738
Due after five years through ten years	124,530	112,847
Due after ten years	45,459	67,328
Varying maturities	16,836	19,542
Totals	208,856	215,108
Amortized Cost [Abstract]
Due in one year or less	3,900	1,655
Due after one year through five years	18,413	14,056
Due after five years through ten years	129,930	112,116
Due after ten years	47,123	64,928
Varying maturities	17,629	19,789
Cost or amortized cost	$ 216,995	$ 212,544