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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, 2019
USD ($)
Claim
Dec. 31, 2018
USD ($)
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 ($)
Dec. 31, 2010
USD ($)
Cumulative Paid Claims Development, Net of Reinsurance [Abstract]                    
Liabilities for losses, claims and loss adjustment expenses, net of reinsurance $ 60,992                  
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 594,558                  
Cumulative Paid Claims Development, Net of Reinsurance [Abstract]                    
Cumulative paid losses, claims and allocated loss adjustment expense, net of reinsurance 577,944                  
Liabilities for losses, claims and loss adjustment expenses, net of reinsurance 16,614                  
Automobile Liability [Member]                    
Incurred Claims Development, Net of Reinsurance [Abstract]                    
Incurred losses, claims and allocated loss adjustment expenses, net of reinsurance 197,132                  
Cumulative Paid Claims Development, Net of Reinsurance [Abstract]                    
Cumulative paid losses, claims and allocated loss adjustment expense, net of reinsurance 161,967                  
Liabilities for losses, claims and loss adjustment expenses, net of reinsurance 35,165                  
Automobile Physical Damage [Member]                    
Incurred Claims Development, Net of Reinsurance [Abstract]                    
Incurred losses, claims and allocated loss adjustment expenses, net of reinsurance 36,086                  
Cumulative Paid Claims Development, Net of Reinsurance [Abstract]                    
Cumulative paid losses, claims and allocated loss adjustment expense, net of reinsurance 33,899                  
All outstanding liabilities prior period net of reinsurance 0                  
Liabilities for losses, claims and loss adjustment expenses, net of reinsurance 2,187                  
General Liability [Member]                    
Incurred Claims Development, Net of Reinsurance [Abstract]                    
Incurred losses, claims and allocated loss adjustment expenses, net of reinsurance 10,946                  
Cumulative Paid Claims Development, Net of Reinsurance [Abstract]                    
Cumulative paid losses, claims and allocated loss adjustment expense, net of reinsurance 8,349                  
All outstanding liabilities prior period net of reinsurance 441                  
Liabilities for losses, claims and loss adjustment expenses, net of reinsurance 3,038                  
Surety [Member]                    
Incurred Claims Development, Net of Reinsurance [Abstract]                    
Incurred losses, claims and allocated loss adjustment expenses, net of reinsurance 30,093                  
Cumulative Paid Claims Development, Net of Reinsurance [Abstract]                    
Cumulative paid losses, claims and allocated loss adjustment expense, net of reinsurance 27,148                  
All outstanding liabilities prior period net of reinsurance 0                  
Liabilities for losses, claims and loss adjustment expenses, net of reinsurance 2,945                  
Accident Year 2010 [Member] | Medicare Supplement [Member]                    
Incurred Claims Development, Net of Reinsurance [Abstract]                    
Incurred losses, claims and allocated loss adjustment expenses, net of reinsurance 34,264 $ 34,264 $ 34,265 $ 34,268 $ 34,272 $ 34,282 $ 34,303 $ 34,323 $ 34,328 $ 34,849
IBNR Reserves $ 0                  
Cumulative number of reported claims | Claim 625,699                  
Cumulative Paid Claims Development, Net of Reinsurance [Abstract]                    
Cumulative paid losses, claims and allocated loss adjustment expense, net of reinsurance $ 34,264 34,264 34,265 34,268 34,272 34,282 34,303 34,323 34,328 29,127
Accident Year 2010 [Member] | Automobile Liability [Member]                    
Incurred Claims Development, Net of Reinsurance [Abstract]                    
Incurred losses, claims and allocated loss adjustment expenses, net of reinsurance 10,215 10,209 10,201 10,202 10,185 10,068 9,937 10,547 10,818 10,752
IBNR Reserves $ 0                  
Cumulative number of reported claims | Claim 1,947                  
Cumulative Paid Claims Development, Net of Reinsurance [Abstract]                    
Cumulative paid losses, claims and allocated loss adjustment expense, net of reinsurance $ 10,215 10,210 10,206 10,090 10,056 9,725 9,382 8,291 6,274 3,211
Accident Year 2010 [Member] | General Liability [Member]                    
Incurred Claims Development, Net of Reinsurance [Abstract]                    
Incurred losses, claims and allocated loss adjustment expenses, net of reinsurance 2,490 2,480 2,473 2,423 2,400 2,258 2,337 2,269 2,699 4,114
IBNR Reserves $ 0                  
Cumulative number of reported claims | Claim 289                  
Cumulative Paid Claims Development, Net of Reinsurance [Abstract]                    
Cumulative paid losses, claims and allocated loss adjustment expense, net of reinsurance $ 2,490 2,463 2,457 2,382 2,368 2,037 1,542 1,374 678 284
Accident Year 2010 [Member] | Surety [Member]                    
Incurred Claims Development, Net of Reinsurance [Abstract]                    
Incurred losses, claims and allocated loss adjustment expenses, net of reinsurance 3,525 3,530 3,534 3,563 3,549 3,607 3,396 3,618 4,624 3,995
IBNR Reserves $ 0                  
Cumulative number of reported claims | Claim 95                  
Cumulative Paid Claims Development, Net of Reinsurance [Abstract]                    
Cumulative paid losses, claims and allocated loss adjustment expense, net of reinsurance $ 3,525 3,530 3,534 3,560 3,545 3,252 2,943 2,780 2,193 $ 928
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 38,299 38,302 38,316 38,327 38,360 38,296 38,188  
IBNR Reserves $ 0                  
Cumulative number of reported claims | Claim 664,057                  
Cumulative Paid Claims Development, Net of Reinsurance [Abstract]                    
Cumulative paid losses, claims and allocated loss adjustment expense, net of reinsurance $ 38,297 38,297 38,299 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 13,329 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 2,132                  
Cumulative Paid Claims Development, Net of Reinsurance [Abstract]                    
Cumulative paid losses, claims and allocated loss adjustment expense, net of reinsurance $ 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 1,400 1,335 1,327 1,242 1,174 1,338 1,452 1,723 3,022  
IBNR Reserves $ 18                  
Cumulative number of reported claims | Claim 208                  
Cumulative Paid Claims Development, Net of Reinsurance [Abstract]                    
Cumulative paid losses, claims and allocated loss adjustment expense, net of reinsurance $ 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 5,112 5,111 5,112 5,031 4,966 5,092 5,080 4,786 4,422  
IBNR Reserves $ 0                  
Cumulative number of reported claims | Claim 126                  
Cumulative Paid Claims Development, Net of Reinsurance [Abstract]                    
Cumulative paid losses, claims and allocated loss adjustment expense, net of reinsurance $ 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 50,985 50,987 50,989 50,998 51,021 50,996 50,021    
IBNR Reserves $ 0                  
Cumulative number of reported claims | Claim 867,052                  
Cumulative Paid Claims Development, Net of Reinsurance [Abstract]                    
Cumulative paid losses, claims and allocated loss adjustment expense, net of reinsurance $ 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 13,357 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 13,288 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 1,377 1,344 1,333 1,214 1,270 1,269 1,305 4,055    
IBNR Reserves $ 25                  
Cumulative number of reported claims | Claim 159                  
Cumulative Paid Claims Development, Net of Reinsurance [Abstract]                    
Cumulative paid losses, claims and allocated loss adjustment expense, net of reinsurance $ 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 4,925 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 $ 4,916 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 57,015 57,016 57,021 57,023 57,034 56,970 56,974      
IBNR Reserves $ 0                  
Cumulative number of reported claims | Claim 957,369                  
Cumulative Paid Claims Development, Net of Reinsurance [Abstract]                    
Cumulative paid losses, claims and allocated loss adjustment expense, net of reinsurance $ 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 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 20,982 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 945 820 865 817 926 728 3,461      
IBNR Reserves $ 33                  
Cumulative number of reported claims | Claim 195                  
Cumulative Paid Claims Development, Net of Reinsurance [Abstract]                    
Cumulative paid losses, claims and allocated loss adjustment expense, net of reinsurance $ 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 2,765 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 $ 2,765 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 56,977 56,976 56,981 56,981 56,938 57,179        
IBNR Reserves $ 0                  
Cumulative number of reported claims | Claim 939,482                  
Cumulative Paid Claims Development, Net of Reinsurance [Abstract]                    
Cumulative paid losses, claims and allocated loss adjustment expense, net of reinsurance $ 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 22,080 21,682 22,353 22,041 21,881 20,812        
IBNR Reserves $ 57                  
Cumulative number of reported claims | Claim 3,543                  
Cumulative Paid Claims Development, Net of Reinsurance [Abstract]                    
Cumulative paid losses, claims and allocated loss adjustment expense, net of reinsurance $ 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 497 406 476 557 501 3,744        
IBNR Reserves $ 1                  
Cumulative number of reported claims | Claim 193                  
Cumulative Paid Claims Development, Net of Reinsurance [Abstract]                    
Cumulative paid losses, claims and allocated loss adjustment expense, net of reinsurance $ 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 2,617 2,685 2,760 2,990 3,130 3,214        
IBNR Reserves $ 5                  
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 $ 2,593 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 54,984 54,990 54,993 54,939 55,482          
IBNR Reserves $ 0                  
Cumulative number of reported claims | Claim 898,387                  
Cumulative Paid Claims Development, Net of Reinsurance [Abstract]                    
Cumulative paid losses, claims and allocated loss adjustment expense, net of reinsurance $ 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 20,086 20,007 20,017 19,857 18,521          
IBNR Reserves $ 88                  
Cumulative number of reported claims | Claim 3,528                  
Cumulative Paid Claims Development, Net of Reinsurance [Abstract]                    
Cumulative paid losses, claims and allocated loss adjustment expense, net of reinsurance $ 19,557 17,612 14,938 11,878 6,226          
Accident Year 2015 [Member] | Automobile Physical Damage [Member]                    
Incurred Claims Development, Net of Reinsurance [Abstract]                    
Incurred losses, claims and allocated loss adjustment expenses, net of reinsurance 7,884 7,896 7,887 7,955 8,287          
IBNR Reserves $ 0                  
Cumulative number of reported claims | Claim 1,588                  
Cumulative Paid Claims Development, Net of Reinsurance [Abstract]                    
Cumulative paid losses, claims and allocated loss adjustment expense, net of reinsurance $ 7,884 7,895 7,885 7,937 6,745          
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 867 1,044 1,227 1,037 4,421          
IBNR Reserves $ 1                  
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 $ 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 1,406 1,359 1,400 1,630 1,902          
IBNR Reserves $ 47                  
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 $ 1,128 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 63,225 63,226 59,851 58,849            
IBNR Reserves $ 0                  
Cumulative number of reported claims | Claim 1,036,885                  
Cumulative Paid Claims Development, Net of Reinsurance [Abstract]                    
Cumulative paid losses, claims and allocated loss adjustment expense, net of reinsurance $ 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 22,388 21,846 21,275 20,549            
IBNR Reserves $ 1,106                  
Cumulative number of reported claims | Claim 3,846                  
Cumulative Paid Claims Development, Net of Reinsurance [Abstract]                    
Cumulative paid losses, claims and allocated loss adjustment expense, net of reinsurance $ 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 6,352 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 6,349 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 608 736 1,148 3,119            
IBNR Reserves $ 0                  
Cumulative number of reported claims | Claim 85                  
Cumulative Paid Claims Development, Net of Reinsurance [Abstract]                    
Cumulative paid losses, claims and allocated loss adjustment expense, net of reinsurance $ 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 1,876 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 $ 1,873 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 69,643 69,655 67,960              
IBNR Reserves $ 0                  
Cumulative number of reported claims | Claim 1,512,117                  
Cumulative Paid Claims Development, Net of Reinsurance [Abstract]                    
Cumulative paid losses, claims and allocated loss adjustment expense, net of reinsurance $ 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 23,766 24,212 22,179              
IBNR Reserves $ 1,413                  
Cumulative number of reported claims | Claim 3,777                  
Cumulative Paid Claims Development, Net of Reinsurance [Abstract]                    
Cumulative paid losses, claims and allocated loss adjustment expense, net of reinsurance $ 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 5,857 5,933 6,257              
IBNR Reserves $ 0                  
Cumulative number of reported claims | Claim 1,321                  
Cumulative Paid Claims Development, Net of Reinsurance [Abstract]                    
Cumulative paid losses, claims and allocated loss adjustment expense, net of reinsurance $ 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 513 488 1,490              
IBNR Reserves $ 70                  
Cumulative number of reported claims | Claim 77                  
Cumulative Paid Claims Development, Net of Reinsurance [Abstract]                    
Cumulative paid losses, claims and allocated loss adjustment expense, net of reinsurance $ 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 3,799 3,671 4,677              
IBNR Reserves $ 79                  
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 $ 3,523 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 80,404 79,140                
IBNR Reserves $ 182                  
Cumulative number of reported claims | Claim 2,049,554                  
Cumulative Paid Claims Development, Net of Reinsurance [Abstract]                    
Cumulative paid losses, claims and allocated loss adjustment expense, net of reinsurance $ 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 25,682 24,284                
IBNR Reserves $ 3,991                  
Cumulative number of reported claims | Claim 3,524                  
Cumulative Paid Claims Development, Net of Reinsurance [Abstract]                    
Cumulative paid losses, claims and allocated loss adjustment expense, net of reinsurance $ 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 7,530 7,805                
IBNR Reserves $ 1                  
Cumulative number of reported claims | Claim 1,449                  
Cumulative Paid Claims Development, Net of Reinsurance [Abstract]                    
Cumulative paid losses, claims and allocated loss adjustment expense, net of reinsurance $ 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 333 1,656                
IBNR Reserves $ 127                  
Cumulative number of reported claims | Claim 73                  
Cumulative Paid Claims Development, Net of Reinsurance [Abstract]                    
Cumulative paid losses, claims and allocated loss adjustment expense, net of reinsurance $ 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 1,938 3,528                
IBNR Reserves $ 236                  
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 $ 1,454 $ 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 88,765                  
IBNR Reserves $ 16,432                  
Cumulative number of reported claims | Claim 1,976,968                  
Cumulative Paid Claims Development, Net of Reinsurance [Abstract]                    
Cumulative paid losses, claims and allocated loss adjustment expense, net of reinsurance $ 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 25,241                  
IBNR Reserves $ 8,649                  
Cumulative number of reported claims | Claim 3,205                  
Cumulative Paid Claims Development, Net of Reinsurance [Abstract]                    
Cumulative paid losses, claims and allocated loss adjustment expense, net of reinsurance $ 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 8,526                  
IBNR Reserves $ 202                  
Cumulative number of reported claims | Claim 1,355                  
Cumulative Paid Claims Development, Net of Reinsurance [Abstract]                    
Cumulative paid losses, claims and allocated loss adjustment expense, net of reinsurance $ 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 1,916                  
IBNR Reserves $ 1,598                  
Cumulative number of reported claims | Claim 61                  
Cumulative Paid Claims Development, Net of Reinsurance [Abstract]                    
Cumulative paid losses, claims and allocated loss adjustment expense, net of reinsurance $ 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 2,130                  
IBNR Reserves $ 1,699                  
Cumulative number of reported claims | Claim 29                  
Cumulative Paid Claims Development, Net of Reinsurance [Abstract]                    
Cumulative paid losses, claims and allocated loss adjustment expense, net of reinsurance $ 259