Investments, Fixed Maturities by Contractual Maturities (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Carrying Value [Abstract]
Due in one year or less	$ 3,148	$ 1,653
Due after one year through five years	19,055	13,738
Due after five years through ten years	126,581	112,847
Due after ten years	42,251	67,328
Varying maturities	16,103	19,542
Totals	207,138	215,108
Amortized Cost [Abstract]
Due in one year or less	3,150	1,655
Due after one year through five years	19,408	14,056
Due after five years through ten years	131,961	112,116
Due after ten years	43,970	64,928
Varying maturities	17,209	19,789
Cost or amortized cost	$ 215,698	$ 212,544