Investments (Major Categories of Investment Income) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Gross investment income	$ 1,030	$ 957	$ 1,848	$ 1,923
Less: Investment expenses	32	27	69	67
Net investment income	998	930	1,779	1,856
Fixed maturities
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Gross investment income	963	841	1,854	1,658
Equity securities
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Gross investment income	20	24	40	48
Mortgage loans on real estate
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Gross investment income	2	3	4	5
Investment real estate
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Gross investment income	0	0	1	2
Policy loans
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Gross investment income	35	33	70	66
Company owned life insurance change in surrender value
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Gross investment income	3	14	(136)	57
Other
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Gross investment income	$ 7	$ 42	$ 15	$ 87