Schedule III. Supplementary Insurance Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Supplementary Insurance Information, by Segment [Line Items]
Supplementary Insurance Information, Deferred Policy Acquisition Costs	$ 8,124	$ 8,351
Supplementary Insurance Information, Future Policy Benefits	36,878	36,038
Supplementary Insurance Information, Unearned Premiums	30,112	29,968
Supplementary Insurance Information, Unpaid Losses	7,978	8,539
Supplementary Insurance Information, Premium Revenue	61,163	61,398
Supplementary Insurance Information, Net Investment Income	3,647	3,892
Supplementary Insurance Inforamtion, Other Income	596	605
Supplementary Insurance Information, Benefits, Claims, Losses and Settlement Expense	42,869	38,847
Supplementary Insurance Information, Commissions and Amortization of Deferred Policy Acquisition Costs	11,312	11,400
Supplementary Insurance Information, General Expenses, Taxes, Licenses and Fees	11,266	11,200
Life Insurance Operations
Supplementary Insurance Information, by Segment [Line Items]
Supplementary Insurance Information, Deferred Policy Acquisition Costs	4,690	4,907
Supplementary Insurance Information, Future Policy Benefits	36,878	36,038
Supplementary Insurance Information, Unearned Premiums	10	13
Supplementary Insurance Information, Unpaid Losses	903	1,008
Supplementary Insurance Information, Premium Revenue	6,119	6,234
Supplementary Insurance Information, Net Investment Income	2,011	2,122
Supplementary Insurance Inforamtion, Other Income	3	2
Supplementary Insurance Information, Benefits, Claims, Losses and Settlement Expense	5,045	5,285
Supplementary Insurance Information, Commissions and Amortization of Deferred Policy Acquisition Costs	1,155	1,033
Supplementary Insurance Information, General Expenses, Taxes, Licenses and Fees	1,521	1,708
P&C Insurance Operations
Supplementary Insurance Information, by Segment [Line Items]
Supplementary Insurance Information, Deferred Policy Acquisition Costs	3,434	3,444
Supplementary Insurance Information, Future Policy Benefits	0	0
Supplementary Insurance Information, Unearned Premiums	30,102	29,955
Supplementary Insurance Information, Unpaid Losses	7,075	7,531
Supplementary Insurance Information, Premium Revenue	55,044	55,164
Supplementary Insurance Information, Net Investment Income	1,571	1,706
Supplementary Insurance Inforamtion, Other Income	593	603
Supplementary Insurance Information, Benefits, Claims, Losses and Settlement Expense	37,824	33,562
Supplementary Insurance Information, Commissions and Amortization of Deferred Policy Acquisition Costs	10,157	10,367
Supplementary Insurance Information, General Expenses, Taxes, Licenses and Fees	8,907	8,823
Non-Insurance Operations
Supplementary Insurance Information, by Segment [Line Items]
Supplementary Insurance Information, Premium Revenue	0	0
Supplementary Insurance Information, Net Investment Income	65	64
Supplementary Insurance Inforamtion, Other Income	0	0
Supplementary Insurance Information, Benefits, Claims, Losses and Settlement Expense	0	0
Supplementary Insurance Information, Commissions and Amortization of Deferred Policy Acquisition Costs	0	0
Supplementary Insurance Information, General Expenses, Taxes, Licenses and Fees	$ 838	$ 669