Statutory Accounting (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Statutory accounting practice [Abstract]      
Percentage lower than combined reported statutory capital and surplus 1.30% 1.10%  
Period of gradual compliance provisions whose RBC is below requirement 5 years    
Net admitted assets $ 1,829 $ 1,881 $ 1,734
Capital and surplus 638 691 659
RBC requirement 278 301 209
Net income 24 73 $ 88
Servicing Assets At Amortized Value [Abstract]      
Restricted catastrophe loss reserve balance 44,823 43,041  
Catastrophe trust fund 47,630 46,221  
Amortized cost 5,358 5,136  
Fair Value $ 5,788 5,276  
Managed Care [Member]      
Statutory accounting practice [Abstract]      
Statutory reserve specified as percentage of RBC to avoid intervention 200.00%    
Property Liability And Casualty Life Insurance Segment [Member]      
Statutory accounting practice [Abstract]      
Statutory reserve specified as percentage of RBC to avoid intervention 300.00%    
Regulated Subsidiaries [Member]      
Statutory accounting practice [Abstract]      
Net admitted assets $ 52,988 $ 51,357