Income Taxes (Schedule of Income Tax Effects of Changes in Temporary Differences) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Deferred policy acquisition costs	$ (77)	$ (46)
Unearned premiums	(10)	(7)
General expenses	(45)	(116)
Depreciation	7	24
Claims liabilities	(38)	(16)
Litigation settlement	0	1,748
AMT credit	(345)	(414)
Impact of repeal of special provision on pre-1984 policyholder surplus	857	0
Impact of TCJA change in corporate tax rate	(54)	0
Deferred income tax expense	$ 295	$ 1,173