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Insurance Reserves and Policyholder Funds (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2017
Dec. 31, 2016
Reserves for life, accident and health [Abstract]        
Future policy benefits     $ 82,435 $ 74,843
Amount of Insurance In Force, Net     240,604 247,480
Unearned premiums     23,449 23,208
Losses, claims and loss adjustment expenses $ 65,689 $ 62,562 65,689 62,562
Other policy liabilities     2,010 2,066
Total insurance reserves and policyholder funds     173,583 162,679
Annualized premiums for accident and health insurance policies 105,422 95,956    
Summary of activity in liability for unpaid loss and claim reserves [Roll Forward]        
Balance at January 1 62,562 63,870    
Less: Reinsurance recoverable on unpaid losses (10,796) (11,741)    
Net balance at January 1 51,766 52,129    
Incurred related to [Abstract]        
Current year 114,099 103,252    
Prior years (1,765) (3,377)    
Total incurred 112,334 99,875    
Paid related to [Abstract]        
Current year 82,092 71,980    
Prior years 28,287 28,258    
Total paid 110,379 100,238    
Net balance at December 31 53,721 51,766    
Plus: Reinsurance recoverable on unpaid losses 11,968 10,796    
Balance at December 31 65,689 62,562    
Reconciliation of total incurred claims to total insurance benefits and losses incurred [Abstract]        
Total incurred losses 112,334 99,875    
Cash surrender value and matured endowments 1,442 1,278    
Benefit reserve changes 3,739 2,044    
Total insurance benefits and losses incurred $ 117,515 $ 103,197    
Ordinary [Member]        
Reserves for life, accident and health [Abstract]        
Future policy benefits     54,752 54,554
Amount of Insurance In Force, Net     238,534 245,017
Mass market [Member]        
Reserves for life, accident and health [Abstract]        
Future policy benefits     1,693 2,003
Amount of Insurance In Force, Net     2,070 2,463
Individual annuities [Member]        
Reserves for life, accident and health [Abstract]        
Future policy benefits     50 84
Amount of Insurance In Force, Net     0 0
Life insurance segment [Member]        
Reserves for life, accident and health [Abstract]        
Future policy benefits     56,495 56,641
Amount of Insurance In Force, Net     240,604 247,480
Accident and health insurance [Member]        
Reserves for life, accident and health [Abstract]        
Future policy benefits     $ 25,940 $ 18,202
Life, accident and health insurance [Member] | Prior to 1977 [Member]        
Future policy benefits [Abstract]        
Policy issue range for future benefits assumptions prior to 1977      
Life, accident and health insurance [Member] | Prior to 1977 [Member] | Minimum [Member]        
Future policy benefits [Abstract]        
Interest rates assumed for future policy benefits 2.50%      
Life, accident and health insurance [Member] | Prior to 1977 [Member] | Maximum [Member]        
Future policy benefits [Abstract]        
Interest rates assumed for future policy benefits 5.50%      
Life, accident and health insurance [Member] | 1977 through 1979 [Member]        
Future policy benefits [Abstract]        
Policy issue range for future benefits assumptions 1977 through 1979      
Life, accident and health insurance [Member] | 1977 through 1979 [Member] | Minimum [Member]        
Future policy benefits [Abstract]        
Interest rates assumed for future policy benefits 5.50%      
Life, accident and health insurance [Member] | 1977 through 1979 [Member] | Maximum [Member]        
Future policy benefits [Abstract]        
Interest rates assumed for future policy benefits 7.00%      
Life, accident and health insurance [Member] | 1980 through 1987 [Member]        
Future policy benefits [Abstract]        
Interest rates assumed for future policy benefits 9.00%      
Policy issue range for future benefits assumptions 1980 through 1987      
Life, accident and health insurance [Member] | 1988 through 2009 [Member]        
Future policy benefits [Abstract]        
Policy issue range for future benefits assumptions 1988 through 2009      
Life, accident and health insurance [Member] | 1988 through 2009 [Member] | Minimum [Member]        
Future policy benefits [Abstract]        
Interest rates assumed for future policy benefits 5.00%      
Life, accident and health insurance [Member] | 1988 through 2009 [Member] | Maximum [Member]        
Future policy benefits [Abstract]        
Interest rates assumed for future policy benefits 7.00%      
Life, accident and health insurance [Member] | 2010 through 2012 [Member]        
Future policy benefits [Abstract]        
Interest rates assumed for future policy benefits 4.00%      
Policy issue range for future benefits assumptions 2010 through 2012 issues      
Life, accident and health insurance [Member] | 2013 through 2017 [Member]        
Future policy benefits [Abstract]        
Policy issue range for future benefits assumptions 2013 through 2017 issues      
Life, accident and health insurance [Member] | 2013 through 2017 [Member] | Minimum [Member]        
Future policy benefits [Abstract]        
Interest rates assumed for future policy benefits 3.50%      
Life, accident and health insurance [Member] | 2013 through 2017 [Member] | Maximum [Member]        
Future policy benefits [Abstract]        
Interest rates assumed for future policy benefits 4.00%