Investments (Major Categories of Investment Income) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Gross investment income	$ 3,799	$ 4,066
Less: Investment expenses	152	174
Net investment income	3,647	3,892
Fixed maturities
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Gross investment income	3,377	3,686
Equity securities
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Gross investment income	95	104
Mortgage loans on real estate
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Gross investment income	9	14
Investment real estate
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Gross investment income	4	7
Policy loans
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Gross investment income	130	128
Company owned life insurance change in surrender value
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Gross investment income	110	(34)
Other
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Gross investment income	$ 74	$ 161