v3.25.4
Liability for Losses and Loss Expenses - Incurred and Paid Claims Development, Net of Reinsurance, Cumulative Claim Frequency and Total of IBNR Reserves Plus Expected Development on Reported Claims (Details)
$ in Thousands
Dec. 31, 2025
USD ($)
Claim
Dec. 31, 2024
USD ($)
Dec. 31, 2023
USD ($)
Dec. 31, 2022
USD ($)
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Dec. 31, 2016
USD ($)
Personal Automobile [Member]                    
Liability for Losses and Loss Expenses [Abstract]                    
Incurred claims and allocated claim adjustment expenses, net of reinsurance $ 1,436,745                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance 1,349,293                  
All outstanding liabilities before 2016, net of reinsurance 1,525                  
Liabilities for claims and claims adjustment expenses, net of reinsurance 88,977                  
Personal Automobile [Member] | 2016 [Member]                    
Liability for Losses and Loss Expenses [Abstract]                    
Incurred claims and allocated claim adjustment expenses, net of reinsurance 156,148 $ 155,822 $ 155,834 $ 156,227 $ 156,436 $ 156,935 $ 157,943 $ 157,516 $ 153,937 $ 150,216
Total IBNR plus expected development on reported claims $ 58                  
Cumulative number of reported claims (in Claim) | Claim 73                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance $ 155,630 155,602 155,505 155,521 154,769 153,521 151,159 143,321 129,507 102,433
Personal Automobile [Member] | 2017 [Member]                    
Liability for Losses and Loss Expenses [Abstract]                    
Incurred claims and allocated claim adjustment expenses, net of reinsurance 172,427 172,376 172,712 173,032 173,730 174,784 175,939 176,728 166,690  
Total IBNR plus expected development on reported claims $ 138                  
Cumulative number of reported claims (in Claim) | Claim 79                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance $ 171,861 171,863 171,513 170,895 169,190 166,099 159,879 142,372 111,964  
Personal Automobile [Member] | 2018 [Member]                    
Liability for Losses and Loss Expenses [Abstract]                    
Incurred claims and allocated claim adjustment expenses, net of reinsurance 178,836 178,799 178,990 179,732 180,787 181,558 183,358 186,580    
Total IBNR plus expected development on reported claims $ 178                  
Cumulative number of reported claims (in Claim) | Claim 81                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance $ 178,152 177,367 176,233 173,922 169,651 163,036 150,175 115,585    
Personal Automobile [Member] | 2019 [Member]                    
Liability for Losses and Loss Expenses [Abstract]                    
Incurred claims and allocated claim adjustment expenses, net of reinsurance 152,896 153,253 153,883 154,805 156,300 157,689 161,056      
Total IBNR plus expected development on reported claims $ 495                  
Cumulative number of reported claims (in Claim) | Claim 68                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance $ 151,806 150,842 150,017 146,667 141,004 127,187 103,101      
Personal Automobile [Member] | 2020 [Member]                    
Liability for Losses and Loss Expenses [Abstract]                    
Incurred claims and allocated claim adjustment expenses, net of reinsurance 98,271 98,506 99,253 100,339 103,585 111,483        
Total IBNR plus expected development on reported claims $ 553                  
Cumulative number of reported claims (in Claim) | Claim 43                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance $ 96,837 96,277 94,094 89,736 81,783 66,084        
Personal Automobile [Member] | 2021 [Member]                    
Liability for Losses and Loss Expenses [Abstract]                    
Incurred claims and allocated claim adjustment expenses, net of reinsurance 113,681 114,874 114,707 118,752 119,364          
Total IBNR plus expected development on reported claims $ 922                  
Cumulative number of reported claims (in Claim) | Claim 47                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance $ 111,044 109,052 103,427 93,998 76,477          
Personal Automobile [Member] | 2022 [Member]                    
Liability for Losses and Loss Expenses [Abstract]                    
Incurred claims and allocated claim adjustment expenses, net of reinsurance 136,349 136,073 134,834 126,203            
Total IBNR plus expected development on reported claims $ 1,942                  
Cumulative number of reported claims (in Claim) | Claim 50                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance $ 131,267 125,624 109,845 83,616            
Personal Automobile [Member] | 2023 [Member]                    
Liability for Losses and Loss Expenses [Abstract]                    
Incurred claims and allocated claim adjustment expenses, net of reinsurance 155,617 155,260 152,740              
Total IBNR plus expected development on reported claims $ 3,733                  
Cumulative number of reported claims (in Claim) | Claim 52                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance $ 142,721 127,752 99,574              
Personal Automobile [Member] | 2024 [Member]                    
Liability for Losses and Loss Expenses [Abstract]                    
Incurred claims and allocated claim adjustment expenses, net of reinsurance 153,248 153,403                
Total IBNR plus expected development on reported claims $ 6,835                  
Cumulative number of reported claims (in Claim) | Claim 46                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance $ 128,410 101,227                
Personal Automobile [Member] | 2025 [Member]                    
Liability for Losses and Loss Expenses [Abstract]                    
Incurred claims and allocated claim adjustment expenses, net of reinsurance 119,272                  
Total IBNR plus expected development on reported claims $ 24,651                  
Cumulative number of reported claims (in Claim) | Claim 38                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance $ 81,565                  
Homeowners [Member]                    
Liability for Losses and Loss Expenses [Abstract]                    
Incurred claims and allocated claim adjustment expenses, net of reinsurance 755,909                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance 731,423                  
All outstanding liabilities before 2016, net of reinsurance 85                  
Liabilities for claims and claims adjustment expenses, net of reinsurance 24,571                  
Homeowners [Member] | 2016 [Member]                    
Liability for Losses and Loss Expenses [Abstract]                    
Incurred claims and allocated claim adjustment expenses, net of reinsurance 63,441 63,462 63,478 63,472 63,409 63,279 63,355 63,735 64,064 62,443
Total IBNR plus expected development on reported claims $ 0                  
Cumulative number of reported claims (in Claim) | Claim 12                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance $ 63,393 63,302 63,296 63,266 63,217 63,162 63,144 62,760 61,145 50,125
Homeowners [Member] | 2017 [Member]                    
Liability for Losses and Loss Expenses [Abstract]                    
Incurred claims and allocated claim adjustment expenses, net of reinsurance 78,706 78,687 78,819 78,815 79,065 79,247 79,305 79,911 79,283  
Total IBNR plus expected development on reported claims $ 0                  
Cumulative number of reported claims (in Claim) | Claim 17                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance $ 78,676 78,662 78,556 78,528 78,454 78,127 78,006 77,663 67,077  
Homeowners [Member] | 2018 [Member]                    
Liability for Losses and Loss Expenses [Abstract]                    
Incurred claims and allocated claim adjustment expenses, net of reinsurance 81,938 81,930 81,977 82,058 82,566 82,905 83,385 81,965    
Total IBNR plus expected development on reported claims $ 26                  
Cumulative number of reported claims (in Claim) | Claim 19                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance $ 81,841 81,833 81,826 81,568 81,464 80,905 79,892 70,385    
Homeowners [Member] | 2019 [Member]                    
Liability for Losses and Loss Expenses [Abstract]                    
Incurred claims and allocated claim adjustment expenses, net of reinsurance 71,644 71,785 72,176 72,168 73,234 73,554 73,294      
Total IBNR plus expected development on reported claims $ 41                  
Cumulative number of reported claims (in Claim) | Claim 16                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance $ 71,563 71,446 71,209 70,884 70,416 69,145 58,074      
Homeowners [Member] | 2020 [Member]                    
Liability for Losses and Loss Expenses [Abstract]                    
Incurred claims and allocated claim adjustment expenses, net of reinsurance 61,340 61,285 61,495 61,595 62,718 61,633        
Total IBNR plus expected development on reported claims $ 28                  
Cumulative number of reported claims (in Claim) | Claim 14                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance $ 61,268 61,181 61,189 60,809 60,348 51,226        
Homeowners [Member] | 2021 [Member]                    
Liability for Losses and Loss Expenses [Abstract]                    
Incurred claims and allocated claim adjustment expenses, net of reinsurance 64,292 64,425 65,451 66,996 67,677          
Total IBNR plus expected development on reported claims $ 162                  
Cumulative number of reported claims (in Claim) | Claim 11                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance $ 64,190 64,258 64,124 63,920 52,161          
Homeowners [Member] | 2022 [Member]                    
Liability for Losses and Loss Expenses [Abstract]                    
Incurred claims and allocated claim adjustment expenses, net of reinsurance 81,795 81,838 82,045 82,433            
Total IBNR plus expected development on reported claims $ 539                  
Cumulative number of reported claims (in Claim) | Claim 10                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance $ 80,673 80,132 79,187 63,107            
Homeowners [Member] | 2023 [Member]                    
Liability for Losses and Loss Expenses [Abstract]                    
Incurred claims and allocated claim adjustment expenses, net of reinsurance 86,676 87,047 86,693              
Total IBNR plus expected development on reported claims $ 975                  
Cumulative number of reported claims (in Claim) | Claim 11                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance $ 85,683 84,194 67,636              
Homeowners [Member] | 2024 [Member]                    
Liability for Losses and Loss Expenses [Abstract]                    
Incurred claims and allocated claim adjustment expenses, net of reinsurance 85,392 85,975                
Total IBNR plus expected development on reported claims $ 1,357                  
Cumulative number of reported claims (in Claim) | Claim 10                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance $ 82,242 67,702                
Homeowners [Member] | 2025 [Member]                    
Liability for Losses and Loss Expenses [Abstract]                    
Incurred claims and allocated claim adjustment expenses, net of reinsurance 80,685                  
Total IBNR plus expected development on reported claims $ 7,675                  
Cumulative number of reported claims (in Claim) | Claim 8                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance $ 61,894                  
Commercial Automobile [Member]                    
Liability for Losses and Loss Expenses [Abstract]                    
Incurred claims and allocated claim adjustment expenses, net of reinsurance 924,041                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance 756,284                  
All outstanding liabilities before 2016, net of reinsurance 42                  
Liabilities for claims and claims adjustment expenses, net of reinsurance 167,799                  
Commercial Automobile [Member] | 2016 [Member]                    
Liability for Losses and Loss Expenses [Abstract]                    
Incurred claims and allocated claim adjustment expenses, net of reinsurance 65,471 65,537 65,602 65,922 66,085 66,894 67,127 65,905 57,353 54,302
Total IBNR plus expected development on reported claims $ 5                  
Cumulative number of reported claims (in Claim) | Claim 13                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance $ 65,314 65,315 65,273 65,076 64,421 60,485 57,237 48,837 38,237 27,033
Commercial Automobile [Member] | 2017 [Member]                    
Liability for Losses and Loss Expenses [Abstract]                    
Incurred claims and allocated claim adjustment expenses, net of reinsurance 65,161 64,821 65,022 64,631 65,310 67,249 67,697 67,927 61,484  
Total IBNR plus expected development on reported claims $ 9                  
Cumulative number of reported claims (in Claim) | Claim 14                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance $ 64,950 64,219 64,074 62,187 59,889 57,128 49,703 40,213 28,707  
Commercial Automobile [Member] | 2018 [Member]                    
Liability for Losses and Loss Expenses [Abstract]                    
Incurred claims and allocated claim adjustment expenses, net of reinsurance 82,020 82,234 82,368 82,226 83,043 82,313 81,396 79,307    
Total IBNR plus expected development on reported claims $ 33                  
Cumulative number of reported claims (in Claim) | Claim 16                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance $ 80,922 80,375 79,308 74,421 69,487 57,451 47,941 33,862    
Commercial Automobile [Member] | 2019 [Member]                    
Liability for Losses and Loss Expenses [Abstract]                    
Incurred claims and allocated claim adjustment expenses, net of reinsurance 84,241 83,709 84,566 86,140 90,290 91,245 88,864      
Total IBNR plus expected development on reported claims $ 76                  
Cumulative number of reported claims (in Claim) | Claim 16                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance $ 83,000 81,647 80,617 72,139 63,575 53,026 36,948      
Commercial Automobile [Member] | 2020 [Member]                    
Liability for Losses and Loss Expenses [Abstract]                    
Incurred claims and allocated claim adjustment expenses, net of reinsurance 83,484 83,590 83,590 85,016 87,766 90,367        
Total IBNR plus expected development on reported claims $ 311                  
Cumulative number of reported claims (in Claim) | Claim 14                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance $ 80,812 78,974 70,669 60,665 46,459 31,884        
Commercial Automobile [Member] | 2021 [Member]                    
Liability for Losses and Loss Expenses [Abstract]                    
Incurred claims and allocated claim adjustment expenses, net of reinsurance 97,070 97,903 96,947 99,231 109,824          
Total IBNR plus expected development on reported claims $ 983                  
Cumulative number of reported claims (in Claim) | Claim 15                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance $ 90,382 80,595 69,908 56,101 39,851          
Commercial Automobile [Member] | 2022 [Member]                    
Liability for Losses and Loss Expenses [Abstract]                    
Incurred claims and allocated claim adjustment expenses, net of reinsurance 109,030 109,314 108,690 115,287            
Total IBNR plus expected development on reported claims $ 3,560                  
Cumulative number of reported claims (in Claim) | Claim 15                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance $ 93,641 81,554 67,367 46,242            
Commercial Automobile [Member] | 2023 [Member]                    
Liability for Losses and Loss Expenses [Abstract]                    
Incurred claims and allocated claim adjustment expenses, net of reinsurance 109,817 110,821 112,135              
Total IBNR plus expected development on reported claims $ 8,281                  
Cumulative number of reported claims (in Claim) | Claim 15                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance $ 83,722 65,131 45,387              
Commercial Automobile [Member] | 2024 [Member]                    
Liability for Losses and Loss Expenses [Abstract]                    
Incurred claims and allocated claim adjustment expenses, net of reinsurance 112,635 115,327                
Total IBNR plus expected development on reported claims $ 16,435                  
Cumulative number of reported claims (in Claim) | Claim 12                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance $ 67,633 43,206                
Commercial Automobile [Member] | 2025 [Member]                    
Liability for Losses and Loss Expenses [Abstract]                    
Incurred claims and allocated claim adjustment expenses, net of reinsurance 115,112                  
Total IBNR plus expected development on reported claims $ 40,776                  
Cumulative number of reported claims (in Claim) | Claim 13                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance $ 45,908                  
Commercial Multi-Peril [Member]                    
Liability for Losses and Loss Expenses [Abstract]                    
Incurred claims and allocated claim adjustment expenses, net of reinsurance 924,673                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance 725,413                  
All outstanding liabilities before 2016, net of reinsurance 471                  
Liabilities for claims and claims adjustment expenses, net of reinsurance 199,731                  
Commercial Multi-Peril [Member] | 2016 [Member]                    
Liability for Losses and Loss Expenses [Abstract]                    
Incurred claims and allocated claim adjustment expenses, net of reinsurance 48,217 48,213 48,374 48,802 48,823 48,732 48,871 48,267 46,988 43,005
Total IBNR plus expected development on reported claims $ 0                  
Cumulative number of reported claims (in Claim) | Claim 6                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance $ 48,181 48,169 48,048 47,432 44,944 43,435 41,193 34,612 29,402 19,660
Commercial Multi-Peril [Member] | 2017 [Member]                    
Liability for Losses and Loss Expenses [Abstract]                    
Incurred claims and allocated claim adjustment expenses, net of reinsurance 54,497 54,475 55,002 54,244 55,076 54,812 56,517 56,043 56,185  
Total IBNR plus expected development on reported claims $ 9                  
Cumulative number of reported claims (in Claim) | Claim 7                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance $ 54,025 53,886 52,422 51,494 49,488 46,361 42,691 36,926 27,399  
Commercial Multi-Peril [Member] | 2018 [Member]                    
Liability for Losses and Loss Expenses [Abstract]                    
Incurred claims and allocated claim adjustment expenses, net of reinsurance 66,012 65,727 65,900 65,911 67,810 67,749 66,470 66,265    
Total IBNR plus expected development on reported claims $ 93                  
Cumulative number of reported claims (in Claim) | Claim 7                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance $ 63,911 63,040 62,253 59,118 54,913 48,050 42,296 30,597    
Commercial Multi-Peril [Member] | 2019 [Member]                    
Liability for Losses and Loss Expenses [Abstract]                    
Incurred claims and allocated claim adjustment expenses, net of reinsurance 75,181 74,995 76,015 75,821 76,326 73,836 71,865      
Total IBNR plus expected development on reported claims $ 247                  
Cumulative number of reported claims (in Claim) | Claim 7                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance $ 71,638 69,762 63,156 55,951 47,522 41,266 28,210      
Commercial Multi-Peril [Member] | 2020 [Member]                    
Liability for Losses and Loss Expenses [Abstract]                    
Incurred claims and allocated claim adjustment expenses, net of reinsurance 72,330 72,624 74,796 76,490 79,910 83,195        
Total IBNR plus expected development on reported claims $ 811                  
Cumulative number of reported claims (in Claim) | Claim 8                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance $ 69,114 66,669 58,754 52,646 46,193 34,729        
Commercial Multi-Peril [Member] | 2021 [Member]                    
Liability for Losses and Loss Expenses [Abstract]                    
Incurred claims and allocated claim adjustment expenses, net of reinsurance 109,817 116,202 119,321 117,574 116,827          
Total IBNR plus expected development on reported claims $ 4,240                  
Cumulative number of reported claims (in Claim) | Claim 7                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance $ 99,812 94,484 82,580 69,735 46,768          
Commercial Multi-Peril [Member] | 2022 [Member]                    
Liability for Losses and Loss Expenses [Abstract]                    
Incurred claims and allocated claim adjustment expenses, net of reinsurance 142,993 139,486 141,935 142,395            
Total IBNR plus expected development on reported claims $ 7,931                  
Cumulative number of reported claims (in Claim) | Claim 7                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance $ 117,583 100,931 86,664 57,641            
Commercial Multi-Peril [Member] | 2023 [Member]                    
Liability for Losses and Loss Expenses [Abstract]                    
Incurred claims and allocated claim adjustment expenses, net of reinsurance 124,791 125,596 129,069              
Total IBNR plus expected development on reported claims $ 14,549                  
Cumulative number of reported claims (in Claim) | Claim 6                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance $ 94,243 82,006 56,238              
Commercial Multi-Peril [Member] | 2024 [Member]                    
Liability for Losses and Loss Expenses [Abstract]                    
Incurred claims and allocated claim adjustment expenses, net of reinsurance 114,326 119,376                
Total IBNR plus expected development on reported claims $ 23,922                  
Cumulative number of reported claims (in Claim) | Claim 5                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance $ 63,806 45,663                
Commercial Multi-Peril [Member] | 2025 [Member]                    
Liability for Losses and Loss Expenses [Abstract]                    
Incurred claims and allocated claim adjustment expenses, net of reinsurance 116,509                  
Total IBNR plus expected development on reported claims $ 40,152                  
Cumulative number of reported claims (in Claim) | Claim 5                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance $ 43,100                  
Workers Compensation [Member]                    
Liability for Losses and Loss Expenses [Abstract]                    
Incurred claims and allocated claim adjustment expenses, net of reinsurance 568,232                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance 455,590                  
All outstanding liabilities before 2016, net of reinsurance 7,435                  
Liabilities for claims and claims adjustment expenses, net of reinsurance 120,077                  
Workers Compensation [Member] | 2016 [Member]                    
Liability for Losses and Loss Expenses [Abstract]                    
Incurred claims and allocated claim adjustment expenses, net of reinsurance 43,580 43,610 43,447 43,484 43,559 44,098 44,969 47,883 49,802 58,814
Total IBNR plus expected development on reported claims $ 89                  
Cumulative number of reported claims (in Claim) | Claim 6                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance $ 42,782 42,486 42,195 41,809 41,543 41,208 40,570 37,178 30,344 $ 14,709
Workers Compensation [Member] | 2017 [Member]                    
Liability for Losses and Loss Expenses [Abstract]                    
Incurred claims and allocated claim adjustment expenses, net of reinsurance 48,362 48,504 48,668 48,802 49,557 51,464 52,687 56,351 60,450  
Total IBNR plus expected development on reported claims $ 358                  
Cumulative number of reported claims (in Claim) | Claim 6                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance $ 46,573 46,339 45,935 45,174 44,242 42,954 39,684 31,990 $ 15,581  
Workers Compensation [Member] | 2018 [Member]                    
Liability for Losses and Loss Expenses [Abstract]                    
Incurred claims and allocated claim adjustment expenses, net of reinsurance 46,046 46,552 46,742 47,007 47,912 52,514 55,291 62,197    
Total IBNR plus expected development on reported claims $ 478                  
Cumulative number of reported claims (in Claim) | Claim 6                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance $ 45,046 44,624 44,359 43,279 41,611 37,072 31,928 $ 17,644    
Workers Compensation [Member] | 2019 [Member]                    
Liability for Losses and Loss Expenses [Abstract]                    
Incurred claims and allocated claim adjustment expenses, net of reinsurance 55,867 56,121 55,893 56,480 57,728 59,624 60,998      
Total IBNR plus expected development on reported claims $ 690                  
Cumulative number of reported claims (in Claim) | Claim 7                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance $ 53,155 51,944 50,079 47,121 41,740 33,009 $ 16,939      
Workers Compensation [Member] | 2020 [Member]                    
Liability for Losses and Loss Expenses [Abstract]                    
Incurred claims and allocated claim adjustment expenses, net of reinsurance 58,499 56,605 56,714 57,384 57,850 57,172        
Total IBNR plus expected development on reported claims $ 693                  
Cumulative number of reported claims (in Claim) | Claim 6                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance $ 52,900 50,928 48,259 44,089 32,817 $ 14,591        
Workers Compensation [Member] | 2021 [Member]                    
Liability for Losses and Loss Expenses [Abstract]                    
Incurred claims and allocated claim adjustment expenses, net of reinsurance 65,088 64,445 64,225 65,530 67,035          
Total IBNR plus expected development on reported claims $ 1,380                  
Cumulative number of reported claims (in Claim) | Claim 7                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance $ 57,950 56,162 51,781 42,633 $ 20,931          
Workers Compensation [Member] | 2022 [Member]                    
Liability for Losses and Loss Expenses [Abstract]                    
Incurred claims and allocated claim adjustment expenses, net of reinsurance 68,715 69,467 67,331 67,046            
Total IBNR plus expected development on reported claims $ 2,522                  
Cumulative number of reported claims (in Claim) | Claim 7                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance $ 58,828 51,916 41,225 $ 18,643            
Workers Compensation [Member] | 2023 [Member]                    
Liability for Losses and Loss Expenses [Abstract]                    
Incurred claims and allocated claim adjustment expenses, net of reinsurance 64,746 65,137 62,401              
Total IBNR plus expected development on reported claims $ 4,616                  
Cumulative number of reported claims (in Claim) | Claim 6                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance $ 49,171 39,922 $ 17,546              
Workers Compensation [Member] | 2024 [Member]                    
Liability for Losses and Loss Expenses [Abstract]                    
Incurred claims and allocated claim adjustment expenses, net of reinsurance 57,859 60,522                
Total IBNR plus expected development on reported claims $ 8,365                  
Cumulative number of reported claims (in Claim) | Claim 5                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance $ 33,111 $ 15,800                
Workers Compensation [Member] | 2025 [Member]                    
Liability for Losses and Loss Expenses [Abstract]                    
Incurred claims and allocated claim adjustment expenses, net of reinsurance 59,470                  
Total IBNR plus expected development on reported claims $ 18,836                  
Cumulative number of reported claims (in Claim) | Claim 4                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance $ 16,074