Insurance Reserves and Policyholder Funds, Incurred Paid Claims Reconciliation (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Net outstanding liabilities [Abstract]
Liabilities for unpaid losses, claims and loss adjustment expenses, net of reinsurance	$ 56,565
Reinsurance recoverable on unpaid losses [Abstract]
Total reinsurance recoverable on unpaid losses	14,354	$ 11,968
Unallocated claims adjustment expenses	1,693
Total gross liability for unpaid losses, claims and loss adjustment expenses	72,612	$ 65,689	$ 62,562
Medicare Supplement [Member]
Net outstanding liabilities [Abstract]
Liabilities for unpaid losses, claims and loss adjustment expenses, net of reinsurance	12,713
Reinsurance recoverable on unpaid losses [Abstract]
Total reinsurance recoverable on unpaid losses	7,926
Automobile Liability [Member]
Net outstanding liabilities [Abstract]
Liabilities for unpaid losses, claims and loss adjustment expenses, net of reinsurance	33,944
Reinsurance recoverable on unpaid losses [Abstract]
Total reinsurance recoverable on unpaid losses	4,777
Automobile Physical Damage [Member]
Net outstanding liabilities [Abstract]
Liabilities for unpaid losses, claims and loss adjustment expenses, net of reinsurance	1,484
Reinsurance recoverable on unpaid losses [Abstract]
Total reinsurance recoverable on unpaid losses	156
General Liability [Member]
Net outstanding liabilities [Abstract]
Liabilities for unpaid losses, claims and loss adjustment expenses, net of reinsurance	3,094
Reinsurance recoverable on unpaid losses [Abstract]
Total reinsurance recoverable on unpaid losses	1,495
Surety [Member]
Net outstanding liabilities [Abstract]
Liabilities for unpaid losses, claims and loss adjustment expenses, net of reinsurance	3,212
Other Short-Duration Insurance Lines [Member]
Net outstanding liabilities [Abstract]
Liabilities for unpaid losses, claims and loss adjustment expenses, net of reinsurance	$ 2,118