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Insurance Reserves and Policyholder Funds, Liability for Unpaid Losses, Claims and Loss Adjustment Expenses (Details)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
USD ($)
Claim
Dec. 31, 2019
USD ($)
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Dec. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
Dec. 31, 2014
USD ($)
Dec. 31, 2013
USD ($)
Dec. 31, 2012
USD ($)
Dec. 31, 2011
USD ($)
Cumulative Paid Claims Development, Net of Reinsurance [Abstract]                    
Liabilities for losses, claims and loss adjustment expenses, net of reinsurance $ 59,669                  
Duration required for loss data to develop the estimated ultimate incurred claims 36 months                  
Minimum [Member]                    
Cumulative Paid Claims Development, Net of Reinsurance [Abstract]                    
Property and casualty claim threshold amount required for review $ 25,000                  
Medicare Supplement [Member]                    
Incurred Claims Development, Net of Reinsurance [Abstract]                    
Incurred losses, claims and allocated loss adjustment expenses, net of reinsurance 634,358                  
Cumulative Paid Claims Development, Net of Reinsurance [Abstract]                    
Cumulative paid losses, claims and allocated loss adjustment expense, net of reinsurance 621,458                  
Liabilities for losses, claims and loss adjustment expenses, net of reinsurance 12,900                  
Automobile Liability [Member]                    
Incurred Claims Development, Net of Reinsurance [Abstract]                    
Incurred losses, claims and allocated loss adjustment expenses, net of reinsurance 211,677                  
Cumulative Paid Claims Development, Net of Reinsurance [Abstract]                    
Cumulative paid losses, claims and allocated loss adjustment expense, net of reinsurance 174,893                  
Liabilities for losses, claims and loss adjustment expenses, net of reinsurance 36,784                  
Automobile Physical Damage [Member]                    
Incurred Claims Development, Net of Reinsurance [Abstract]                    
Incurred losses, claims and allocated loss adjustment expenses, net of reinsurance 37,910                  
Cumulative Paid Claims Development, Net of Reinsurance [Abstract]                    
Cumulative paid losses, claims and allocated loss adjustment expense, net of reinsurance 35,947                  
All outstanding liabilities prior period net of reinsurance 1                  
Liabilities for losses, claims and loss adjustment expenses, net of reinsurance 1,964                  
General Liability [Member]                    
Incurred Claims Development, Net of Reinsurance [Abstract]                    
Incurred losses, claims and allocated loss adjustment expenses, net of reinsurance 9,691                  
Cumulative Paid Claims Development, Net of Reinsurance [Abstract]                    
Cumulative paid losses, claims and allocated loss adjustment expense, net of reinsurance 6,619                  
All outstanding liabilities prior period net of reinsurance 343                  
Liabilities for losses, claims and loss adjustment expenses, net of reinsurance 3,415                  
Surety [Member]                    
Incurred Claims Development, Net of Reinsurance [Abstract]                    
Incurred losses, claims and allocated loss adjustment expenses, net of reinsurance 26,787                  
Cumulative Paid Claims Development, Net of Reinsurance [Abstract]                    
Cumulative paid losses, claims and allocated loss adjustment expense, net of reinsurance 23,901                  
All outstanding liabilities prior period net of reinsurance 54                  
Liabilities for losses, claims and loss adjustment expenses, net of reinsurance 2,940                  
Accident Year 2011 [Member] | Medicare Supplement [Member]                    
Incurred Claims Development, Net of Reinsurance [Abstract]                    
Incurred losses, claims and allocated loss adjustment expenses, net of reinsurance 38,297 $ 38,297 $ 38,297 $ 38,299 $ 38,302 $ 38,316 $ 38,327 $ 38,360 $ 38,296 $ 38,188
IBNR Reserves $ 0                  
Cumulative number of reported claims | Claim 664,056                  
Cumulative Paid Claims Development, Net of Reinsurance [Abstract]                    
Cumulative paid losses, claims and allocated loss adjustment expense, net of reinsurance $ 38,297 38,297 38,297 38,299 38,302 38,316 38,327 38,360 38,296 31,720
Accident Year 2011 [Member] | Automobile Liability [Member]                    
Incurred Claims Development, Net of Reinsurance [Abstract]                    
Incurred losses, claims and allocated loss adjustment expenses, net of reinsurance 13,328 13,329 13,330 13,385 13,495 13,281 13,289 13,235 13,802 12,263
IBNR Reserves $ 0                  
Cumulative number of reported claims | Claim 2,134                  
Cumulative Paid Claims Development, Net of Reinsurance [Abstract]                    
Cumulative paid losses, claims and allocated loss adjustment expense, net of reinsurance $ 13,328 13,329 13,330 13,199 13,106 13,039 12,071 9,858 7,934 4,205
Accident Year 2011 [Member] | General Liability [Member]                    
Incurred Claims Development, Net of Reinsurance [Abstract]                    
Incurred losses, claims and allocated loss adjustment expenses, net of reinsurance 1,534 1,400 1,335 1,327 1,242 1,174 1,338 1,452 1,723 3,022
IBNR Reserves $ 20                  
Cumulative number of reported claims | Claim 210                  
Cumulative Paid Claims Development, Net of Reinsurance [Abstract]                    
Cumulative paid losses, claims and allocated loss adjustment expense, net of reinsurance $ 1,426 1,325 1,285 1,278 1,169 1,161 835 582 412 295
Accident Year 2011 [Member] | Surety [Member]                    
Incurred Claims Development, Net of Reinsurance [Abstract]                    
Incurred losses, claims and allocated loss adjustment expenses, net of reinsurance 5,163 5,112 5,111 5,112 5,031 4,966 5,092 5,080 4,786 4,422
IBNR Reserves $ 7                  
Cumulative number of reported claims | Claim 128                  
Cumulative Paid Claims Development, Net of Reinsurance [Abstract]                    
Cumulative paid losses, claims and allocated loss adjustment expense, net of reinsurance $ 5,117 5,112 5,111 5,109 5,022 4,939 4,748 4,622 3,207 $ 1,031
Accident Year 2012 [Member] | Medicare Supplement [Member]                    
Incurred Claims Development, Net of Reinsurance [Abstract]                    
Incurred losses, claims and allocated loss adjustment expenses, net of reinsurance 50,984 50,984 50,985 50,987 50,989 50,998 51,021 50,996 50,021  
IBNR Reserves $ 0                  
Cumulative number of reported claims | Claim 867,050                  
Cumulative Paid Claims Development, Net of Reinsurance [Abstract]                    
Cumulative paid losses, claims and allocated loss adjustment expense, net of reinsurance $ 50,984 50,984 50,985 50,987 50,989 50,998 51,021 50,996 42,267  
Accident Year 2012 [Member] | Automobile Liability [Member]                    
Incurred Claims Development, Net of Reinsurance [Abstract]                    
Incurred losses, claims and allocated loss adjustment expenses, net of reinsurance 13,373 13,373 13,357 13,343 13,313 13,707 14,108 15,007 12,980  
IBNR Reserves $ 0                  
Cumulative number of reported claims | Claim 2,343                  
Cumulative Paid Claims Development, Net of Reinsurance [Abstract]                    
Cumulative paid losses, claims and allocated loss adjustment expense, net of reinsurance $ 13,373 13,373 13,288 13,211 13,197 12,932 11,507 8,791 4,627  
Accident Year 2012 [Member] | General Liability [Member]                    
Incurred Claims Development, Net of Reinsurance [Abstract]                    
Incurred losses, claims and allocated loss adjustment expenses, net of reinsurance 1,388 1,377 1,344 1,333 1,214 1,270 1,269 1,305 4,055  
IBNR Reserves $ 25                  
Cumulative number of reported claims | Claim 161                  
Cumulative Paid Claims Development, Net of Reinsurance [Abstract]                    
Cumulative paid losses, claims and allocated loss adjustment expense, net of reinsurance $ 1,280 1,269 1,260 1,219 1,113 1,034 847 707 371  
Accident Year 2012 [Member] | Surety [Member]                    
Incurred Claims Development, Net of Reinsurance [Abstract]                    
Incurred losses, claims and allocated loss adjustment expenses, net of reinsurance 4,944 4,925 4,892 4,880 4,869 5,345 5,396 4,767 4,979  
IBNR Reserves $ 2                  
Cumulative number of reported claims | Claim 89                  
Cumulative Paid Claims Development, Net of Reinsurance [Abstract]                    
Cumulative paid losses, claims and allocated loss adjustment expense, net of reinsurance $ 4,934 4,916 4,878 4,880 4,869 5,331 4,856 4,581 $ 2,257  
Accident Year 2013 [Member] | Medicare Supplement [Member]                    
Incurred Claims Development, Net of Reinsurance [Abstract]                    
Incurred losses, claims and allocated loss adjustment expenses, net of reinsurance 57,014 57,015 57,016 57,021 57,023 57,034 56,970 56,974    
IBNR Reserves $ 0                  
Cumulative number of reported claims | Claim 957,363                  
Cumulative Paid Claims Development, Net of Reinsurance [Abstract]                    
Cumulative paid losses, claims and allocated loss adjustment expense, net of reinsurance $ 57,014 57,015 57,016 57,021 57,023 57,034 56,970 47,770    
Accident Year 2013 [Member] | Automobile Liability [Member]                    
Incurred Claims Development, Net of Reinsurance [Abstract]                    
Incurred losses, claims and allocated loss adjustment expenses, net of reinsurance 20,972 20,972 21,020 21,352 21,823 21,096 20,702 18,664    
IBNR Reserves $ 0                  
Cumulative number of reported claims | Claim 3,267                  
Cumulative Paid Claims Development, Net of Reinsurance [Abstract]                    
Cumulative paid losses, claims and allocated loss adjustment expense, net of reinsurance $ 20,972 20,972 20,982 20,382 19,407 16,782 12,193 5,144    
Accident Year 2013 [Member] | General Liability [Member]                    
Incurred Claims Development, Net of Reinsurance [Abstract]                    
Incurred losses, claims and allocated loss adjustment expenses, net of reinsurance 904 945 820 865 817 926 728 3,461    
IBNR Reserves $ 11                  
Cumulative number of reported claims | Claim 197                  
Cumulative Paid Claims Development, Net of Reinsurance [Abstract]                    
Cumulative paid losses, claims and allocated loss adjustment expense, net of reinsurance $ 855 805 803 791 811 579 339 104    
Accident Year 2013 [Member] | Surety [Member]                    
Incurred Claims Development, Net of Reinsurance [Abstract]                    
Incurred losses, claims and allocated loss adjustment expenses, net of reinsurance 2,757 2,765 2,809 2,866 2,947 2,743 2,007 3,060    
IBNR Reserves $ 0                  
Cumulative number of reported claims | Claim 58                  
Cumulative Paid Claims Development, Net of Reinsurance [Abstract]                    
Cumulative paid losses, claims and allocated loss adjustment expense, net of reinsurance $ 2,757 2,765 2,749 2,789 2,763 1,369 1,010 $ 323    
Accident Year 2014 [Member] | Medicare Supplement [Member]                    
Incurred Claims Development, Net of Reinsurance [Abstract]                    
Incurred losses, claims and allocated loss adjustment expenses, net of reinsurance 56,976 56,977 56,976 56,981 56,981 56,938 57,179      
IBNR Reserves $ 0                  
Cumulative number of reported claims | Claim 939,478                  
Cumulative Paid Claims Development, Net of Reinsurance [Abstract]                    
Cumulative paid losses, claims and allocated loss adjustment expense, net of reinsurance $ 56,976 56,977 56,976 56,981 56,981 56,938 48,024      
Accident Year 2014 [Member] | Automobile Liability [Member]                    
Incurred Claims Development, Net of Reinsurance [Abstract]                    
Incurred losses, claims and allocated loss adjustment expenses, net of reinsurance 22,100 22,080 21,682 22,353 22,041 21,881 20,812      
IBNR Reserves $ 48                  
Cumulative number of reported claims | Claim 3,544                  
Cumulative Paid Claims Development, Net of Reinsurance [Abstract]                    
Cumulative paid losses, claims and allocated loss adjustment expense, net of reinsurance $ 21,813 21,735 20,878 20,177 17,554 13,807 6,822      
Accident Year 2014 [Member] | General Liability [Member]                    
Incurred Claims Development, Net of Reinsurance [Abstract]                    
Incurred losses, claims and allocated loss adjustment expenses, net of reinsurance 523 497 406 476 557 501 3,744      
IBNR Reserves $ 6                  
Cumulative number of reported claims | Claim 194                  
Cumulative Paid Claims Development, Net of Reinsurance [Abstract]                    
Cumulative paid losses, claims and allocated loss adjustment expense, net of reinsurance $ 498 493 373 369 331 299 171      
Accident Year 2014 [Member] | Surety [Member]                    
Incurred Claims Development, Net of Reinsurance [Abstract]                    
Incurred losses, claims and allocated loss adjustment expenses, net of reinsurance 2,818 2,617 2,685 2,760 2,990 3,130 3,214      
IBNR Reserves $ 43                  
Cumulative number of reported claims | Claim 54                  
Cumulative Paid Claims Development, Net of Reinsurance [Abstract]                    
Cumulative paid losses, claims and allocated loss adjustment expense, net of reinsurance $ 2,562 2,593 2,664 2,739 2,727 2,327 $ 1,331      
Accident Year 2015 [Member] | Medicare Supplement [Member]                    
Incurred Claims Development, Net of Reinsurance [Abstract]                    
Incurred losses, claims and allocated loss adjustment expenses, net of reinsurance 54,985 54,984 54,990 54,993 54,939 55,482        
IBNR Reserves $ 0                  
Cumulative number of reported claims | Claim 898,374                  
Cumulative Paid Claims Development, Net of Reinsurance [Abstract]                    
Cumulative paid losses, claims and allocated loss adjustment expense, net of reinsurance $ 54,985 54,984 54,990 54,993 54,876 45,430        
Accident Year 2015 [Member] | Automobile Liability [Member]                    
Incurred Claims Development, Net of Reinsurance [Abstract]                    
Incurred losses, claims and allocated loss adjustment expenses, net of reinsurance 20,680 20,086 20,007 20,017 19,857 18,521        
IBNR Reserves $ 75                  
Cumulative number of reported claims | Claim 3,525                  
Cumulative Paid Claims Development, Net of Reinsurance [Abstract]                    
Cumulative paid losses, claims and allocated loss adjustment expense, net of reinsurance $ 20,234 19,557 17,612 14,938 11,878 6,226        
Accident Year 2015 [Member] | General Liability [Member]                    
Incurred Claims Development, Net of Reinsurance [Abstract]                    
Incurred losses, claims and allocated loss adjustment expenses, net of reinsurance 855 867 1,044 1,227 1,037 4,421        
IBNR Reserves $ 0                  
Cumulative number of reported claims | Claim 146                  
Cumulative Paid Claims Development, Net of Reinsurance [Abstract]                    
Cumulative paid losses, claims and allocated loss adjustment expense, net of reinsurance $ 855 863 664 464 259 98        
Accident Year 2015 [Member] | Surety [Member]                    
Incurred Claims Development, Net of Reinsurance [Abstract]                    
Incurred losses, claims and allocated loss adjustment expenses, net of reinsurance 1,310 1,406 1,359 1,400 1,630 1,902        
IBNR Reserves $ 6                  
Cumulative number of reported claims | Claim 50                  
Cumulative Paid Claims Development, Net of Reinsurance [Abstract]                    
Cumulative paid losses, claims and allocated loss adjustment expense, net of reinsurance $ 1,271 1,128 1,125 1,127 856 $ 641        
Accident Year 2016 [Member] | Medicare Supplement [Member]                    
Incurred Claims Development, Net of Reinsurance [Abstract]                    
Incurred losses, claims and allocated loss adjustment expenses, net of reinsurance 63,221 63,225 63,226 59,851 58,849          
IBNR Reserves $ 0                  
Cumulative number of reported claims | Claim 1,036,769                  
Cumulative Paid Claims Development, Net of Reinsurance [Abstract]                    
Cumulative paid losses, claims and allocated loss adjustment expense, net of reinsurance $ 63,221 63,225 63,226 59,747 49,165          
Accident Year 2016 [Member] | Automobile Liability [Member]                    
Incurred Claims Development, Net of Reinsurance [Abstract]                    
Incurred losses, claims and allocated loss adjustment expenses, net of reinsurance 22,245 22,388 21,846 21,275 20,549          
IBNR Reserves $ 140                  
Cumulative number of reported claims | Claim 3,842                  
Cumulative Paid Claims Development, Net of Reinsurance [Abstract]                    
Cumulative paid losses, claims and allocated loss adjustment expense, net of reinsurance $ 21,408 19,613 16,397 13,141 6,796          
Accident Year 2016 [Member] | Automobile Physical Damage [Member]                    
Incurred Claims Development, Net of Reinsurance [Abstract]                    
Incurred losses, claims and allocated loss adjustment expenses, net of reinsurance 6,289 6,289 6,352 6,386 6,877          
IBNR Reserves $ 0                  
Cumulative number of reported claims | Claim 1,269                  
Cumulative Paid Claims Development, Net of Reinsurance [Abstract]                    
Cumulative paid losses, claims and allocated loss adjustment expense, net of reinsurance $ 6,289 6,289 6,349 6,353 5,804          
Accident Year 2016 [Member] | General Liability [Member]                    
Incurred Claims Development, Net of Reinsurance [Abstract]                    
Incurred losses, claims and allocated loss adjustment expenses, net of reinsurance 621 608 736 1,148 3,119          
IBNR Reserves $ 1                  
Cumulative number of reported claims | Claim 92                  
Cumulative Paid Claims Development, Net of Reinsurance [Abstract]                    
Cumulative paid losses, claims and allocated loss adjustment expense, net of reinsurance $ 617 608 568 203 116          
Accident Year 2016 [Member] | Surety [Member]                    
Incurred Claims Development, Net of Reinsurance [Abstract]                    
Incurred losses, claims and allocated loss adjustment expenses, net of reinsurance 1,865 1,876 1,865 1,812 3,314          
IBNR Reserves $ 0                  
Cumulative number of reported claims | Claim 46                  
Cumulative Paid Claims Development, Net of Reinsurance [Abstract]                    
Cumulative paid losses, claims and allocated loss adjustment expense, net of reinsurance $ 1,862 1,873 1,772 1,732 $ 1,054          
Accident Year 2017 [Member] | Medicare Supplement [Member]                    
Incurred Claims Development, Net of Reinsurance [Abstract]                    
Incurred losses, claims and allocated loss adjustment expenses, net of reinsurance 69,635 69,643 69,655 67,960            
IBNR Reserves $ 0                  
Cumulative number of reported claims | Claim 1,510,654                  
Cumulative Paid Claims Development, Net of Reinsurance [Abstract]                    
Cumulative paid losses, claims and allocated loss adjustment expense, net of reinsurance $ 69,635 69,643 69,517 57,696            
Accident Year 2017 [Member] | Automobile Liability [Member]                    
Incurred Claims Development, Net of Reinsurance [Abstract]                    
Incurred losses, claims and allocated loss adjustment expenses, net of reinsurance 25,180 23,766 24,212 22,179            
IBNR Reserves $ 801                  
Cumulative number of reported claims | Claim 3,772                  
Cumulative Paid Claims Development, Net of Reinsurance [Abstract]                    
Cumulative paid losses, claims and allocated loss adjustment expense, net of reinsurance $ 22,778 20,221 16,317 7,401            
Accident Year 2017 [Member] | Automobile Physical Damage [Member]                    
Incurred Claims Development, Net of Reinsurance [Abstract]                    
Incurred losses, claims and allocated loss adjustment expenses, net of reinsurance 5,860 5,857 5,933 6,257            
IBNR Reserves $ 0                  
Cumulative number of reported claims | Claim 1,324                  
Cumulative Paid Claims Development, Net of Reinsurance [Abstract]                    
Cumulative paid losses, claims and allocated loss adjustment expense, net of reinsurance $ 5,860 5,856 5,914 5,215            
Accident Year 2017 [Member] | General Liability [Member]                    
Incurred Claims Development, Net of Reinsurance [Abstract]                    
Incurred losses, claims and allocated loss adjustment expenses, net of reinsurance 738 513 488 1,490            
IBNR Reserves $ 68                  
Cumulative number of reported claims | Claim 82                  
Cumulative Paid Claims Development, Net of Reinsurance [Abstract]                    
Cumulative paid losses, claims and allocated loss adjustment expense, net of reinsurance $ 556 365 136 75            
Accident Year 2017 [Member] | Surety [Member]                    
Incurred Claims Development, Net of Reinsurance [Abstract]                    
Incurred losses, claims and allocated loss adjustment expenses, net of reinsurance 3,629 3,799 3,671 4,677            
IBNR Reserves $ 13                  
Cumulative number of reported claims | Claim 58                  
Cumulative Paid Claims Development, Net of Reinsurance [Abstract]                    
Cumulative paid losses, claims and allocated loss adjustment expense, net of reinsurance $ 3,545 3,523 3,255 $ 1,971            
Accident Year 2018 [Member] | Medicare Supplement [Member]                    
Incurred Claims Development, Net of Reinsurance [Abstract]                    
Incurred losses, claims and allocated loss adjustment expenses, net of reinsurance 80,361 80,404 79,140              
IBNR Reserves $ 0                  
Cumulative number of reported claims | Claim 1,782,982                  
Cumulative Paid Claims Development, Net of Reinsurance [Abstract]                    
Cumulative paid losses, claims and allocated loss adjustment expense, net of reinsurance $ 80,361 80,222 66,565              
Accident Year 2018 [Member] | Automobile Liability [Member]                    
Incurred Claims Development, Net of Reinsurance [Abstract]                    
Incurred losses, claims and allocated loss adjustment expenses, net of reinsurance 27,338 25,682 24,284              
IBNR Reserves $ 2,072                  
Cumulative number of reported claims | Claim 3,578                  
Cumulative Paid Claims Development, Net of Reinsurance [Abstract]                    
Cumulative paid losses, claims and allocated loss adjustment expense, net of reinsurance $ 21,121 15,647 6,989              
Accident Year 2018 [Member] | Automobile Physical Damage [Member]                    
Incurred Claims Development, Net of Reinsurance [Abstract]                    
Incurred losses, claims and allocated loss adjustment expenses, net of reinsurance 7,447 7,530 7,805              
IBNR Reserves $ 0                  
Cumulative number of reported claims | Claim 1,452                  
Cumulative Paid Claims Development, Net of Reinsurance [Abstract]                    
Cumulative paid losses, claims and allocated loss adjustment expense, net of reinsurance $ 7,446 7,510 6,344              
Accident Year 2018 [Member] | General Liability [Member]                    
Incurred Claims Development, Net of Reinsurance [Abstract]                    
Incurred losses, claims and allocated loss adjustment expenses, net of reinsurance 198 333 1,656              
IBNR Reserves $ 40                  
Cumulative number of reported claims | Claim 75                  
Cumulative Paid Claims Development, Net of Reinsurance [Abstract]                    
Cumulative paid losses, claims and allocated loss adjustment expense, net of reinsurance $ 115 90 65              
Accident Year 2018 [Member] | Surety [Member]                    
Incurred Claims Development, Net of Reinsurance [Abstract]                    
Incurred losses, claims and allocated loss adjustment expenses, net of reinsurance 1,381 1,938 3,528              
IBNR Reserves $ 6                  
Cumulative number of reported claims | Claim 62                  
Cumulative Paid Claims Development, Net of Reinsurance [Abstract]                    
Cumulative paid losses, claims and allocated loss adjustment expense, net of reinsurance $ 1,361 1,454 $ 1,157              
Accident Year 2019 [Member] | Medicare Supplement [Member]                    
Incurred Claims Development, Net of Reinsurance [Abstract]                    
Incurred losses, claims and allocated loss adjustment expenses, net of reinsurance 87,028 88,765                
IBNR Reserves $ 172                  
Cumulative number of reported claims | Claim 2,242,156                  
Cumulative Paid Claims Development, Net of Reinsurance [Abstract]                    
Cumulative paid losses, claims and allocated loss adjustment expense, net of reinsurance $ 86,856 72,333                
Accident Year 2019 [Member] | Automobile Liability [Member]                    
Incurred Claims Development, Net of Reinsurance [Abstract]                    
Incurred losses, claims and allocated loss adjustment expenses, net of reinsurance 24,045 25,241                
IBNR Reserves $ 3,117                  
Cumulative number of reported claims | Claim 3,479                  
Cumulative Paid Claims Development, Net of Reinsurance [Abstract]                    
Cumulative paid losses, claims and allocated loss adjustment expense, net of reinsurance $ 14,694 7,305                
Accident Year 2019 [Member] | Automobile Physical Damage [Member]                    
Incurred Claims Development, Net of Reinsurance [Abstract]                    
Incurred losses, claims and allocated loss adjustment expenses, net of reinsurance 8,026 8,526                
IBNR Reserves $ 2                  
Cumulative number of reported claims | Claim 1,485                  
Cumulative Paid Claims Development, Net of Reinsurance [Abstract]                    
Cumulative paid losses, claims and allocated loss adjustment expense, net of reinsurance $ 8,005 6,360                
Accident Year 2019 [Member] | General Liability [Member]                    
Incurred Claims Development, Net of Reinsurance [Abstract]                    
Incurred losses, claims and allocated loss adjustment expenses, net of reinsurance 707 1,916                
IBNR Reserves $ 261                  
Cumulative number of reported claims | Claim 82                  
Cumulative Paid Claims Development, Net of Reinsurance [Abstract]                    
Cumulative paid losses, claims and allocated loss adjustment expense, net of reinsurance $ 209 41                
Accident Year 2019 [Member] | Surety [Member]                    
Incurred Claims Development, Net of Reinsurance [Abstract]                    
Incurred losses, claims and allocated loss adjustment expenses, net of reinsurance 657 2,130                
IBNR Reserves $ 128                  
Cumulative number of reported claims | Claim 30                  
Cumulative Paid Claims Development, Net of Reinsurance [Abstract]                    
Cumulative paid losses, claims and allocated loss adjustment expense, net of reinsurance $ 395 $ 259                
Accident Year 2020 [Member] | Medicare Supplement [Member]                    
Incurred Claims Development, Net of Reinsurance [Abstract]                    
Incurred losses, claims and allocated loss adjustment expenses, net of reinsurance 75,857                  
IBNR Reserves $ 12,728                  
Cumulative number of reported claims | Claim 1,620,697                  
Cumulative Paid Claims Development, Net of Reinsurance [Abstract]                    
Cumulative paid losses, claims and allocated loss adjustment expense, net of reinsurance $ 63,129                  
Accident Year 2020 [Member] | Automobile Liability [Member]                    
Incurred Claims Development, Net of Reinsurance [Abstract]                    
Incurred losses, claims and allocated loss adjustment expenses, net of reinsurance 22,416                  
IBNR Reserves $ 12,187                  
Cumulative number of reported claims | Claim 2,183                  
Cumulative Paid Claims Development, Net of Reinsurance [Abstract]                    
Cumulative paid losses, claims and allocated loss adjustment expense, net of reinsurance $ 5,172                  
Accident Year 2020 [Member] | Automobile Physical Damage [Member]                    
Incurred Claims Development, Net of Reinsurance [Abstract]                    
Incurred losses, claims and allocated loss adjustment expenses, net of reinsurance 10,288                  
IBNR Reserves $ 177                  
Cumulative number of reported claims | Claim 1,526                  
Cumulative Paid Claims Development, Net of Reinsurance [Abstract]                    
Cumulative paid losses, claims and allocated loss adjustment expense, net of reinsurance $ 8,347                  
Accident Year 2020 [Member] | General Liability [Member]                    
Incurred Claims Development, Net of Reinsurance [Abstract]                    
Incurred losses, claims and allocated loss adjustment expenses, net of reinsurance 2,223                  
IBNR Reserves $ 1,749                  
Cumulative number of reported claims | Claim 62                  
Cumulative Paid Claims Development, Net of Reinsurance [Abstract]                    
Cumulative paid losses, claims and allocated loss adjustment expense, net of reinsurance $ 208                  
Accident Year 2020 [Member] | Surety [Member]                    
Incurred Claims Development, Net of Reinsurance [Abstract]                    
Incurred losses, claims and allocated loss adjustment expenses, net of reinsurance 2,263                  
IBNR Reserves $ 1,887                  
Cumulative number of reported claims | Claim 20                  
Cumulative Paid Claims Development, Net of Reinsurance [Abstract]                    
Cumulative paid losses, claims and allocated loss adjustment expense, net of reinsurance $ 97