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Historical Loss and LAE Development - Incurred Losses and Loss Adjustment Expenses, Net of Reinsurance (Details)
$ in Thousands
Dec. 31, 2023
USD ($)
claim
Dec. 31, 2022
USD ($)
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Dec. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
Dec. 31, 2014
USD ($)
Claims Development                    
Liabilities for losses and loss adjustment expenses, net of reinsurance $ 1,688,676 $ 1,575,548                
Casualty Segment | Primary Occurrence                    
Claims Development                    
Incurred losses and loss adjustment expenses, net of reinsurance 1,077,107                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance 604,687                  
All outstanding liabilities before 2014, net of reinsurance 10,149                  
Liabilities for losses and loss adjustment expenses, net of reinsurance 482,569 461,527                
Casualty Segment | Excess Occurrence                    
Claims Development                    
Incurred losses and loss adjustment expenses, net of reinsurance 812,872                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance 277,651                  
All outstanding liabilities before 2014, net of reinsurance 21,757                  
Liabilities for losses and loss adjustment expenses, net of reinsurance 556,978 467,592                
Casualty Segment | Claims Made                    
Claims Development                    
Incurred losses and loss adjustment expenses, net of reinsurance 489,810                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance 287,041                  
All outstanding liabilities before 2014, net of reinsurance 4,795                  
Liabilities for losses and loss adjustment expenses, net of reinsurance 207,564 211,296                
Casualty Segment | Transportation                    
Claims Development                    
Incurred losses and loss adjustment expenses, net of reinsurance 470,864                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance 324,659                  
All outstanding liabilities before 2014, net of reinsurance 2,021                  
Liabilities for losses and loss adjustment expenses, net of reinsurance 148,226 141,737                
Casualty Segment | Short-duration Insurance Contracts, Accident Year 2014 | Primary Occurrence                    
Claims Development                    
Incurred losses and loss adjustment expenses, net of reinsurance 64,160 64,449 $ 63,727 $ 65,636 $ 66,702 $ 66,389 $ 67,237 $ 71,592 $ 79,497 $ 88,092
Total IBNR $ 1,844                  
Cumulative number of reported claims | claim 4,303                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance $ 59,783 58,361 56,784 55,965 52,387 47,343 40,270 29,545 18,771 11,436
Casualty Segment | Short-duration Insurance Contracts, Accident Year 2014 | Excess Occurrence                    
Claims Development                    
Incurred losses and loss adjustment expenses, net of reinsurance 37,804 35,918 35,683 35,128 33,458 33,372 32,274 35,119 39,095 50,889
Total IBNR $ 1,811                  
Cumulative number of reported claims | claim 932                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance $ 33,423 30,484 28,963 26,068 23,376 22,541 18,852 11,002 4,006 1,899
Casualty Segment | Short-duration Insurance Contracts, Accident Year 2014 | Claims Made                    
Claims Development                    
Incurred losses and loss adjustment expenses, net of reinsurance 52,557 52,796 52,619 53,783 53,841 51,554 55,350 58,152 55,386 53,929
Total IBNR $ 1,335                  
Cumulative number of reported claims | claim 1,306                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance $ 51,078 51,063 50,714 46,122 44,127 40,080 35,755 27,923 9,775 1,705
Casualty Segment | Short-duration Insurance Contracts, Accident Year 2014 | Transportation                    
Claims Development                    
Incurred losses and loss adjustment expenses, net of reinsurance 41,940 42,067 41,974 41,156 40,508 40,202 38,590 36,452 33,015 38,361
Total IBNR $ 274                  
Cumulative number of reported claims | claim 3,099                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance $ 41,564 41,528 40,427 40,006 38,282 33,190 27,457 19,676 13,933 7,125
Casualty Segment | Short-duration Insurance Contracts, Accident Year 2015 | Primary Occurrence                    
Claims Development                    
Incurred losses and loss adjustment expenses, net of reinsurance 75,958 77,110 75,438 75,470 76,398 78,675 83,579 84,975 94,835  
Total IBNR $ 3,048                  
Cumulative number of reported claims | claim 4,416                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance $ 69,635 68,650 62,997 58,866 54,270 45,056 33,020 19,902 10,157  
Casualty Segment | Short-duration Insurance Contracts, Accident Year 2015 | Excess Occurrence                    
Claims Development                    
Incurred losses and loss adjustment expenses, net of reinsurance 40,580 41,471 41,690 42,446 43,328 42,840 47,392 50,857 53,672  
Total IBNR $ 2,287                  
Cumulative number of reported claims | claim 707                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance $ 36,559 35,958 32,752 31,352 28,756 23,184 19,571 10,127 2,048  
Casualty Segment | Short-duration Insurance Contracts, Accident Year 2015 | Claims Made                    
Claims Development                    
Incurred losses and loss adjustment expenses, net of reinsurance 37,332 37,578 38,609 39,619 39,653 39,906 42,206 47,831 55,006  
Total IBNR $ 935                  
Cumulative number of reported claims | claim 1,338                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance $ 35,408 34,671 33,529 32,241 28,795 20,920 16,774 10,738 2,215  
Casualty Segment | Short-duration Insurance Contracts, Accident Year 2015 | Transportation                    
Claims Development                    
Incurred losses and loss adjustment expenses, net of reinsurance 47,466 46,685 45,807 45,525 45,162 46,395 47,021 46,258 38,561  
Total IBNR $ 570                  
Cumulative number of reported claims | claim 3,188                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance $ 46,159 45,002 42,626 41,345 39,339 37,222 29,554 20,709 6,984  
Casualty Segment | Short-duration Insurance Contracts, Accident Year 2016 | Primary Occurrence                    
Claims Development                    
Incurred losses and loss adjustment expenses, net of reinsurance 78,358 77,729 79,440 83,374 85,449 90,611 96,753 101,950    
Total IBNR $ 5,321                  
Cumulative number of reported claims | claim 4,349                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance $ 69,968 65,517 60,349 56,152 48,042 35,764 24,186 10,142    
Casualty Segment | Short-duration Insurance Contracts, Accident Year 2016 | Excess Occurrence                    
Claims Development                    
Incurred losses and loss adjustment expenses, net of reinsurance 27,733 29,940 29,671 30,251 33,125 37,676 49,385 56,341    
Total IBNR $ 3,281                  
Cumulative number of reported claims | claim 656                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance $ 20,603 17,807 14,400 12,703 10,054 7,441 3,396 1,068    
Casualty Segment | Short-duration Insurance Contracts, Accident Year 2016 | Claims Made                    
Claims Development                    
Incurred losses and loss adjustment expenses, net of reinsurance 61,881 61,876 65,078 64,730 67,728 69,493 67,760 59,992    
Total IBNR $ 1,452                  
Cumulative number of reported claims | claim 1,507                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance $ 56,342 53,737 52,846 47,999 39,370 27,465 14,558 2,060    
Casualty Segment | Short-duration Insurance Contracts, Accident Year 2016 | Transportation                    
Claims Development                    
Incurred losses and loss adjustment expenses, net of reinsurance 56,515 55,718 53,915 52,818 52,277 54,105 53,519 50,430    
Total IBNR $ 959                  
Cumulative number of reported claims | claim 3,944                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance $ 54,245 52,555 47,488 43,564 38,001 30,354 18,354 8,923    
Casualty Segment | Short-duration Insurance Contracts, Accident Year 2017 | Primary Occurrence                    
Claims Development                    
Incurred losses and loss adjustment expenses, net of reinsurance 90,744 90,344 90,759 95,513 102,583 111,391 119,741      
Total IBNR $ 8,014                  
Cumulative number of reported claims | claim 4,550                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance $ 76,283 71,419 62,236 52,823 38,783 25,933 13,154      
Casualty Segment | Short-duration Insurance Contracts, Accident Year 2017 | Excess Occurrence                    
Claims Development                    
Incurred losses and loss adjustment expenses, net of reinsurance 39,600 41,620 43,249 44,737 48,363 55,868 62,863      
Total IBNR $ 9,045                  
Cumulative number of reported claims | claim 656                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance $ 25,328 22,835 18,470 15,441 9,275 5,679 17      
Casualty Segment | Short-duration Insurance Contracts, Accident Year 2017 | Claims Made                    
Claims Development                    
Incurred losses and loss adjustment expenses, net of reinsurance 60,340 61,546 59,907 57,450 62,714 62,450 60,572      
Total IBNR $ 3,053                  
Cumulative number of reported claims | claim 1,648                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance $ 50,623 47,087 42,918 36,522 22,728 11,350 2,455      
Casualty Segment | Short-duration Insurance Contracts, Accident Year 2017 | Transportation                    
Claims Development                    
Incurred losses and loss adjustment expenses, net of reinsurance 47,619 46,742 45,351 43,764 45,017 53,641 55,640      
Total IBNR $ 1,075                  
Cumulative number of reported claims | claim 3,640                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance $ 43,891 41,064 36,141 30,260 24,090 17,070 7,979      
Casualty Segment | Short-duration Insurance Contracts, Accident Year 2018 | Primary Occurrence                    
Claims Development                    
Incurred losses and loss adjustment expenses, net of reinsurance 115,793 114,414 115,076 125,731 130,281 141,513        
Total IBNR $ 13,981                  
Cumulative number of reported claims | claim 4,902                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance $ 93,504 78,103 63,980 48,424 32,365 15,066        
Casualty Segment | Short-duration Insurance Contracts, Accident Year 2018 | Excess Occurrence                    
Claims Development                    
Incurred losses and loss adjustment expenses, net of reinsurance 47,949 49,861 51,023 54,626 62,646 69,362        
Total IBNR $ 17,886                  
Cumulative number of reported claims | claim 622                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance $ 23,958 22,016 17,294 10,801 5,823 2,506        
Casualty Segment | Short-duration Insurance Contracts, Accident Year 2018 | Claims Made                    
Claims Development                    
Incurred losses and loss adjustment expenses, net of reinsurance 43,912 47,692 48,457 56,468 62,416 66,128        
Total IBNR $ 4,611                  
Cumulative number of reported claims | claim 1,394                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance $ 31,002 27,351 24,918 18,840 11,965 1,964        
Casualty Segment | Short-duration Insurance Contracts, Accident Year 2018 | Transportation                    
Claims Development                    
Incurred losses and loss adjustment expenses, net of reinsurance 35,776 35,442 36,468 38,719 54,592 57,597        
Total IBNR $ 1,538                  
Cumulative number of reported claims | claim 3,405                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance $ 30,916 28,844 24,503 19,216 12,827 6,980        
Casualty Segment | Short-duration Insurance Contracts, Accident Year 2019 | Primary Occurrence                    
Claims Development                    
Incurred losses and loss adjustment expenses, net of reinsurance 111,156 109,051 120,570 135,209 146,011          
Total IBNR $ 24,277                  
Cumulative number of reported claims | claim 5,334                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance $ 74,380 57,750 41,911 30,673 15,698          
Casualty Segment | Short-duration Insurance Contracts, Accident Year 2019 | Excess Occurrence                    
Claims Development                    
Incurred losses and loss adjustment expenses, net of reinsurance 77,185 80,147 79,083 89,691 88,078          
Total IBNR $ 29,498                  
Cumulative number of reported claims | claim 694                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance $ 38,291 33,375 25,389 19,044 4,213          
Casualty Segment | Short-duration Insurance Contracts, Accident Year 2019 | Claims Made                    
Claims Development                    
Incurred losses and loss adjustment expenses, net of reinsurance 43,969 46,500 52,224 61,712 62,918          
Total IBNR $ 10,846                  
Cumulative number of reported claims | claim 1,513                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance $ 27,133 19,930 14,117 8,123 1,839          
Casualty Segment | Short-duration Insurance Contracts, Accident Year 2019 | Transportation                    
Claims Development                    
Incurred losses and loss adjustment expenses, net of reinsurance 44,236 41,925 43,976 56,129 58,297          
Total IBNR $ 2,996                  
Cumulative number of reported claims | claim 3,318                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance $ 35,546 26,422 21,120 15,852 7,148          
Casualty Segment | Short-duration Insurance Contracts, Accident Year 2020 | Primary Occurrence                    
Claims Development                    
Incurred losses and loss adjustment expenses, net of reinsurance 117,962 122,785 137,439 145,171            
Total IBNR $ 42,852                  
Cumulative number of reported claims | claim 4,697                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance $ 60,764 45,267 30,596 17,096            
Casualty Segment | Short-duration Insurance Contracts, Accident Year 2020 | Excess Occurrence                    
Claims Development                    
Incurred losses and loss adjustment expenses, net of reinsurance 81,284 90,274 98,409 107,579            
Total IBNR $ 48,145                  
Cumulative number of reported claims | claim 635                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance $ 24,657 20,988 13,856 2,901            
Casualty Segment | Short-duration Insurance Contracts, Accident Year 2020 | Claims Made                    
Claims Development                    
Incurred losses and loss adjustment expenses, net of reinsurance 40,878 46,853 56,785 60,278            
Total IBNR $ 18,725                  
Cumulative number of reported claims | claim 1,297                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance $ 16,537 10,412 5,687 1,488            
Casualty Segment | Short-duration Insurance Contracts, Accident Year 2020 | Transportation                    
Claims Development                    
Incurred losses and loss adjustment expenses, net of reinsurance 28,856 27,665 35,524 43,573            
Total IBNR $ 4,251                  
Cumulative number of reported claims | claim 1,647                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance $ 20,749 12,035 7,876 3,986            
Casualty Segment | Short-duration Insurance Contracts, Accident Year 2021 | Primary Occurrence                    
Claims Development                    
Incurred losses and loss adjustment expenses, net of reinsurance 125,672 128,483 142,797              
Total IBNR $ 59,412                  
Cumulative number of reported claims | claim 4,581                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance $ 43,951 29,633 14,428              
Casualty Segment | Short-duration Insurance Contracts, Accident Year 2021 | Excess Occurrence                    
Claims Development                    
Incurred losses and loss adjustment expenses, net of reinsurance 125,028 136,354 136,433              
Total IBNR $ 64,648                  
Cumulative number of reported claims | claim 820                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance $ 38,977 23,841 5,317              
Casualty Segment | Short-duration Insurance Contracts, Accident Year 2021 | Claims Made                    
Claims Development                    
Incurred losses and loss adjustment expenses, net of reinsurance 38,946 45,854 51,219              
Total IBNR $ 22,443                  
Cumulative number of reported claims | claim 1,224                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance $ 8,661 5,615 999              
Casualty Segment | Short-duration Insurance Contracts, Accident Year 2021 | Transportation                    
Claims Development                    
Incurred losses and loss adjustment expenses, net of reinsurance 47,913 51,581 51,322              
Total IBNR $ 6,990                  
Cumulative number of reported claims | claim 2,318                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance $ 25,886 15,345 5,341              
Casualty Segment | Short-duration Insurance Contracts, Accident Year 2022 | Primary Occurrence                    
Claims Development                    
Incurred losses and loss adjustment expenses, net of reinsurance 144,861 155,203                
Total IBNR $ 88,355                  
Cumulative number of reported claims | claim 4,557                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance $ 38,712 17,714                
Casualty Segment | Short-duration Insurance Contracts, Accident Year 2022 | Excess Occurrence                    
Claims Development                    
Incurred losses and loss adjustment expenses, net of reinsurance 156,822 153,895                
Total IBNR $ 90,640                  
Cumulative number of reported claims | claim 866                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance $ 28,764 7,479                
Casualty Segment | Short-duration Insurance Contracts, Accident Year 2022 | Claims Made                    
Claims Development                    
Incurred losses and loss adjustment expenses, net of reinsurance 55,316 58,289                
Total IBNR $ 34,438                  
Cumulative number of reported claims | claim 1,139                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance $ 8,836 2,088                
Casualty Segment | Short-duration Insurance Contracts, Accident Year 2022 | Transportation                    
Claims Development                    
Incurred losses and loss adjustment expenses, net of reinsurance 53,680 60,862                
Total IBNR $ 14,840                  
Cumulative number of reported claims | claim 2,708                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance $ 18,296 6,442                
Casualty Segment | Short-duration Insurance Contracts, Accident Year 2023 | Primary Occurrence                    
Claims Development                    
Incurred losses and loss adjustment expenses, net of reinsurance 152,443                  
Total IBNR $ 115,076                  
Cumulative number of reported claims | claim 3,770                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance $ 17,707                  
Casualty Segment | Short-duration Insurance Contracts, Accident Year 2023 | Excess Occurrence                    
Claims Development                    
Incurred losses and loss adjustment expenses, net of reinsurance 178,887                  
Total IBNR $ 120,637                  
Cumulative number of reported claims | claim 540                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance $ 7,091                  
Casualty Segment | Short-duration Insurance Contracts, Accident Year 2023 | Claims Made                    
Claims Development                    
Incurred losses and loss adjustment expenses, net of reinsurance 54,679                  
Total IBNR $ 40,398                  
Cumulative number of reported claims | claim 1,077                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance $ 1,421                  
Casualty Segment | Short-duration Insurance Contracts, Accident Year 2023 | Transportation                    
Claims Development                    
Incurred losses and loss adjustment expenses, net of reinsurance 66,863                  
Total IBNR $ 16,584                  
Cumulative number of reported claims | claim 2,488                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance $ 7,407                  
Property segment                    
Claims Development                    
Incurred losses and loss adjustment expenses, net of reinsurance 909,038                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance 767,085                  
All outstanding liabilities before 2014, net of reinsurance 923                  
Liabilities for losses and loss adjustment expenses, net of reinsurance 142,876 149,901                
Property segment | Short-duration Insurance Contracts, Accident Year 2014                    
Claims Development                    
Incurred losses and loss adjustment expenses, net of reinsurance 49,413 49,468 49,520 49,479 49,444 49,217 48,761 48,801 49,441 56,587
Total IBNR $ 2                  
Cumulative number of reported claims | claim 4,564                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance $ 49,400 49,339 49,317 49,259 49,027 47,799 46,528 46,148 43,380 30,550
Property segment | Short-duration Insurance Contracts, Accident Year 2015                    
Claims Development                    
Incurred losses and loss adjustment expenses, net of reinsurance 54,065 53,359 52,878 52,781 53,111 52,720 53,958 56,103 59,863  
Total IBNR $ 6                  
Cumulative number of reported claims | claim 4,077                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance $ 53,369 53,208 52,400 52,342 52,078 51,290 50,197 49,348 32,184  
Property segment | Short-duration Insurance Contracts, Accident Year 2016                    
Claims Development                    
Incurred losses and loss adjustment expenses, net of reinsurance 55,385 55,536 55,383 55,424 55,930 55,384 55,594 62,900    
Total IBNR $ 34                  
Cumulative number of reported claims | claim 3,379                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance $ 55,247 55,215 54,747 54,328 53,006 51,371 46,921 33,134    
Property segment | Short-duration Insurance Contracts, Accident Year 2017                    
Claims Development                    
Incurred losses and loss adjustment expenses, net of reinsurance 81,677 81,912 82,319 82,671 84,961 83,273 90,803      
Total IBNR $ 517                  
Cumulative number of reported claims | claim 2,893                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance $ 80,965 80,958 80,581 78,360 74,415 66,818 41,314      
Property segment | Short-duration Insurance Contracts, Accident Year 2018                    
Claims Development                    
Incurred losses and loss adjustment expenses, net of reinsurance 79,234 79,093 80,470 79,961 83,457 89,091        
Total IBNR $ 1,177                  
Cumulative number of reported claims | claim 2,339                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance $ 77,696 76,378 75,253 72,357 68,264 37,048        
Property segment | Short-duration Insurance Contracts, Accident Year 2019                    
Claims Development                    
Incurred losses and loss adjustment expenses, net of reinsurance 61,185 59,901 61,116 65,189 71,232          
Total IBNR $ 975                  
Cumulative number of reported claims | claim 2,458                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance $ 59,015 57,038 55,092 51,740 30,703          
Property segment | Short-duration Insurance Contracts, Accident Year 2020                    
Claims Development                    
Incurred losses and loss adjustment expenses, net of reinsurance 108,363 108,546 110,466 118,247            
Total IBNR $ 6,190                  
Cumulative number of reported claims | claim 2,861                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance $ 96,350 88,401 79,660 43,192            
Property segment | Short-duration Insurance Contracts, Accident Year 2021                    
Claims Development                    
Incurred losses and loss adjustment expenses, net of reinsurance 115,587 116,424 135,447              
Total IBNR $ 7,512                  
Cumulative number of reported claims | claim 3,103                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance $ 99,671 89,174 57,272              
Property segment | Short-duration Insurance Contracts, Accident Year 2022                    
Claims Development                    
Incurred losses and loss adjustment expenses, net of reinsurance 119,877 138,756                
Total IBNR $ 18,613                  
Cumulative number of reported claims | claim 2,940                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance $ 84,235 44,667                
Property segment | Short-duration Insurance Contracts, Accident Year 2023                    
Claims Development                    
Incurred losses and loss adjustment expenses, net of reinsurance 184,252                  
Total IBNR $ 51,040                  
Cumulative number of reported claims | claim 2,881                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance $ 111,137                  
Surety Segment                    
Claims Development                    
Incurred losses and loss adjustment expenses, net of reinsurance 92,000                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance 45,081                  
All outstanding liabilities before 2014, net of reinsurance (106)                  
Liabilities for losses and loss adjustment expenses, net of reinsurance 46,813 40,116                
Surety Segment | Short-duration Insurance Contracts, Accident Year 2014                    
Claims Development                    
Incurred losses and loss adjustment expenses, net of reinsurance 4,219 4,230 4,227 4,266 4,319 4,267 4,427 5,225 8,106 16,450
Total IBNR $ 2                  
Cumulative number of reported claims | claim 1,364                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance $ 4,213 4,218 4,197 4,214 4,234 4,131 4,059 4,166 4,283 $ 722
Surety Segment | Short-duration Insurance Contracts, Accident Year 2015                    
Claims Development                    
Incurred losses and loss adjustment expenses, net of reinsurance 8,586 8,580 9,275 9,521 9,792 10,456 11,113 12,957 16,958  
Total IBNR $ 27                  
Cumulative number of reported claims | claim 1,253                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance $ 8,575 8,462 9,168 9,186 9,183 9,436 7,695 6,719 $ 3,192  
Surety Segment | Short-duration Insurance Contracts, Accident Year 2016                    
Claims Development                    
Incurred losses and loss adjustment expenses, net of reinsurance 7,963 8,134 7,948 8,391 8,895 9,351 11,062 18,928    
Total IBNR $ 53                  
Cumulative number of reported claims | claim 1,392                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance $ 7,795 7,946 7,673 8,086 7,640 6,299 5,817 $ 3,087    
Surety Segment | Short-duration Insurance Contracts, Accident Year 2017                    
Claims Development                    
Incurred losses and loss adjustment expenses, net of reinsurance 7,644 7,769 8,034 8,116 8,798 8,641 16,127      
Total IBNR $ 67                  
Cumulative number of reported claims | claim 1,869                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance $ 7,342 7,372 7,362 7,221 7,062 2,862 $ 979      
Surety Segment | Short-duration Insurance Contracts, Accident Year 2018                    
Claims Development                    
Incurred losses and loss adjustment expenses, net of reinsurance 3,760 3,996 3,947 4,564 7,227 16,765        
Total IBNR $ 85                  
Cumulative number of reported claims | claim 1,373                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance $ 2,079 3,020 2,536 2,368 2,588 $ 1,835        
Surety Segment | Short-duration Insurance Contracts, Accident Year 2019                    
Claims Development                    
Incurred losses and loss adjustment expenses, net of reinsurance 3,453 4,062 5,053 7,205 14,785          
Total IBNR $ 390                  
Cumulative number of reported claims | claim 1,205                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance $ 3,093 3,039 2,765 2,433 $ 336          
Surety Segment | Short-duration Insurance Contracts, Accident Year 2020                    
Claims Development                    
Incurred losses and loss adjustment expenses, net of reinsurance 11,516 12,378 14,840 19,241            
Total IBNR $ 3,158                  
Cumulative number of reported claims | claim 954                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance $ 3,907 3,828 2,719 $ 835            
Surety Segment | Short-duration Insurance Contracts, Accident Year 2021                    
Claims Development                    
Incurred losses and loss adjustment expenses, net of reinsurance 12,127 11,724 18,540              
Total IBNR $ 7,411                  
Cumulative number of reported claims | claim 907                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance $ 3,075 3,229 $ 1,197              
Surety Segment | Short-duration Insurance Contracts, Accident Year 2022                    
Claims Development                    
Incurred losses and loss adjustment expenses, net of reinsurance 11,490 20,185                
Total IBNR $ 6,192                  
Cumulative number of reported claims | claim 951                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance $ 4,161 $ (241)                
Surety Segment | Short-duration Insurance Contracts, Accident Year 2023                    
Claims Development                    
Incurred losses and loss adjustment expenses, net of reinsurance 21,242                  
Total IBNR $ 19,993                  
Cumulative number of reported claims | claim 468                  
Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance $ 841