XML 123 R109.htm IDEA: XBRL DOCUMENT v3.22.4
Incurred Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance (Detail)
$ in Thousands
Dec. 31, 2022
USD ($)
Claim
Dec. 31, 2021
USD ($)
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 ($)
Dec. 31, 2013
USD ($)
Commercial Specialty | Property Insurance                    
Claims Development [Line Items]                    
Incurred Claims and Allocated Claims Adjustment Expenses, Net of Reinsurance $ 242,719                  
Commercial Specialty | Property Insurance | Accident Year 2020                    
Claims Development [Line Items]                    
Incurred Claims and Allocated Claims Adjustment Expenses, Net of Reinsurance 77,860 $ 78,760 $ 75,609              
IBNR [1] $ 2,003                  
Cumulative Number of Reported Claims | Claim 4,598                  
Commercial Specialty | Property Insurance | Accident Year 2021                    
Claims Development [Line Items]                    
Incurred Claims and Allocated Claims Adjustment Expenses, Net of Reinsurance $ 82,841 84,037                
IBNR [1] $ 5,712                  
Cumulative Number of Reported Claims | Claim 4,206                  
Commercial Specialty | Property Insurance | Accident Year 2022                    
Claims Development [Line Items]                    
Incurred Claims and Allocated Claims Adjustment Expenses, Net of Reinsurance $ 82,018                  
IBNR [1] $ 14,533                  
Commercial Specialty | Property Insurance | Accident Year 2022                    
Claims Development [Line Items]                    
Cumulative Number of Reported Claims | Claim 3,234                  
Commercial Specialty | Casualty Insurance                    
Claims Development [Line Items]                    
Incurred Claims and Allocated Claims Adjustment Expenses, Net of Reinsurance $ 748,185                  
Commercial Specialty | Casualty Insurance | Accident Year 2019                    
Claims Development [Line Items]                    
Incurred Claims and Allocated Claims Adjustment Expenses, Net of Reinsurance 76,844 73,968 69,114 $ 69,145            
IBNR [2] $ 9,924                  
Cumulative Number of Reported Claims | Claim 2,695                  
Commercial Specialty | Casualty Insurance | Accident Year 2020                    
Claims Development [Line Items]                    
Incurred Claims and Allocated Claims Adjustment Expenses, Net of Reinsurance $ 88,347 84,260 83,553              
IBNR [2] $ 23,282                  
Cumulative Number of Reported Claims | Claim 2,719                  
Commercial Specialty | Casualty Insurance | Accident Year 2021                    
Claims Development [Line Items]                    
Incurred Claims and Allocated Claims Adjustment Expenses, Net of Reinsurance $ 113,382 112,124                
IBNR [2] $ 55,202                  
Cumulative Number of Reported Claims | Claim 3,689                  
Commercial Specialty | Casualty Insurance | Accident Year 2022                    
Claims Development [Line Items]                    
Incurred Claims and Allocated Claims Adjustment Expenses, Net of Reinsurance $ 138,225                  
IBNR [2] $ 106,457                  
Cumulative Number of Reported Claims | Claim 2,782                  
Commercial Specialty | Casualty Insurance | Accident Year 2013                    
Claims Development [Line Items]                    
Incurred Claims and Allocated Claims Adjustment Expenses, Net of Reinsurance $ 56,336 56,786 56,901 58,961 $ 61,714 $ 65,193 $ 66,566 $ 68,081 $ 68,230 $ 63,931
IBNR [2] $ 1,226                  
Cumulative Number of Reported Claims | Claim 2,597                  
Commercial Specialty | Casualty Insurance | Accident Year 2014                    
Claims Development [Line Items]                    
Incurred Claims and Allocated Claims Adjustment Expenses, Net of Reinsurance $ 49,134 50,919 51,329 54,971 57,230 57,828 58,618 60,779 61,427  
IBNR [2] $ 2,006                  
Cumulative Number of Reported Claims | Claim 2,400                  
Commercial Specialty | Casualty Insurance | Accident Year 2015                    
Claims Development [Line Items]                    
Incurred Claims and Allocated Claims Adjustment Expenses, Net of Reinsurance $ 55,322 56,279 56,498 60,231 58,993 58,384 57,088 57,710    
IBNR [2] $ 2,652                  
Cumulative Number of Reported Claims | Claim 2,162                  
Commercial Specialty | Casualty Insurance | Accident Year 2016                    
Claims Development [Line Items]                    
Incurred Claims and Allocated Claims Adjustment Expenses, Net of Reinsurance $ 52,347 52,401 52,760 52,078 53,751 54,123 54,576      
IBNR [2] $ 2,949                  
Cumulative Number of Reported Claims | Claim 1,997                  
Commercial Specialty | Casualty Insurance | Accident Year 2017                    
Claims Development [Line Items]                    
Incurred Claims and Allocated Claims Adjustment Expenses, Net of Reinsurance $ 57,369 56,273 54,704 53,876 54,978 54,654        
IBNR [2] $ 4,535                  
Cumulative Number of Reported Claims | Claim 1,915                  
Commercial Specialty | Casualty Insurance | Accident Year 2018                    
Claims Development [Line Items]                    
Incurred Claims and Allocated Claims Adjustment Expenses, Net of Reinsurance $ 60,879 60,372 57,922 57,605 58,220          
IBNR [2] $ 7,436                  
Cumulative Number of Reported Claims | Claim 2,345                  
Reinsurance Operations | Casualty Insurance                    
Claims Development [Line Items]                    
Incurred Claims and Allocated Claims Adjustment Expenses, Net of Reinsurance $ 192,016                  
Reinsurance Operations | Casualty Insurance | Accident Year 2019                    
Claims Development [Line Items]                    
Incurred Claims and Allocated Claims Adjustment Expenses, Net of Reinsurance 14,080 13,685 13,686 13,686            
IBNR [3] $ 11,092                  
Cumulative Number of Reported Claims | Claim 0                  
Reinsurance Operations | Casualty Insurance | Accident Year 2020                    
Claims Development [Line Items]                    
Incurred Claims and Allocated Claims Adjustment Expenses, Net of Reinsurance $ 31,258 30,375 30,398              
IBNR [3] $ 23,998                  
Cumulative Number of Reported Claims | Claim 0                  
Reinsurance Operations | Casualty Insurance | Accident Year 2021                    
Claims Development [Line Items]                    
Incurred Claims and Allocated Claims Adjustment Expenses, Net of Reinsurance $ 50,122 49,177                
IBNR [3] $ 42,927                  
Cumulative Number of Reported Claims | Claim 0                  
Reinsurance Operations | Casualty Insurance | Accident Year 2022                    
Claims Development [Line Items]                    
Incurred Claims and Allocated Claims Adjustment Expenses, Net of Reinsurance $ 86,624                  
IBNR [3] $ 82,247                  
Cumulative Number of Reported Claims | Claim 0                  
Reinsurance Operations | Casualty Insurance | Accident Year 2013                    
Claims Development [Line Items]                    
Incurred Claims and Allocated Claims Adjustment Expenses, Net of Reinsurance $ 0 0 0 0 850 850 850 1,009 1,009 $ 1,009
IBNR [3] $ 0                  
Cumulative Number of Reported Claims | Claim 0                  
Reinsurance Operations | Casualty Insurance | Accident Year 2014                    
Claims Development [Line Items]                    
Incurred Claims and Allocated Claims Adjustment Expenses, Net of Reinsurance $ 0 0 0 590 1,954 1,954 1,954 1,987 $ 1,987  
IBNR [3] $ 0                  
Cumulative Number of Reported Claims | Claim 0                  
Reinsurance Operations | Casualty Insurance | Accident Year 2015                    
Claims Development [Line Items]                    
Incurred Claims and Allocated Claims Adjustment Expenses, Net of Reinsurance $ 0 0 1,090 2,179 2,779 2,779 2,779 2,779    
IBNR [3] $ 0                  
Cumulative Number of Reported Claims | Claim 0                  
Reinsurance Operations | Casualty Insurance | Accident Year 2016                    
Claims Development [Line Items]                    
Incurred Claims and Allocated Claims Adjustment Expenses, Net of Reinsurance $ 0 3,627 3,627 3,627 3,627 3,627 3,627      
IBNR [3] $ 0                  
Cumulative Number of Reported Claims | Claim 0                  
Reinsurance Operations | Casualty Insurance | Accident Year 2017                    
Claims Development [Line Items]                    
Incurred Claims and Allocated Claims Adjustment Expenses, Net of Reinsurance $ 4,358 4,358 4,358 4,358 4,358 4,358        
IBNR [3] $ 4,356                  
Cumulative Number of Reported Claims | Claim 0                  
Reinsurance Operations | Casualty Insurance | Accident Year 2018                    
Claims Development [Line Items]                    
Incurred Claims and Allocated Claims Adjustment Expenses, Net of Reinsurance $ 5,574 5,574 5,573 5,573 5,573          
IBNR [3] $ 5,568                  
Cumulative Number of Reported Claims | Claim 0                  
Exited Lines Segment | Property Insurance                    
Claims Development [Line Items]                    
Incurred Claims and Allocated Claims Adjustment Expenses, Net of Reinsurance $ 471,113                  
Exited Lines Segment | Property Insurance | Accident Year 2019                    
Claims Development [Line Items]                    
Incurred Claims and Allocated Claims Adjustment Expenses, Net of Reinsurance 160,865 162,523 159,713 155,116            
IBNR [4] $ 6,645                  
Cumulative Number of Reported Claims | Claim 0                  
Exited Lines Segment | Property Insurance | Accident Year 2020                    
Claims Development [Line Items]                    
Incurred Claims and Allocated Claims Adjustment Expenses, Net of Reinsurance $ 161,351 159,718 155,747              
IBNR [4] $ 9,558                  
Cumulative Number of Reported Claims | Claim 0                  
Exited Lines Segment | Property Insurance | Accident Year 2021                    
Claims Development [Line Items]                    
Incurred Claims and Allocated Claims Adjustment Expenses, Net of Reinsurance $ 106,079 108,708                
IBNR [4] $ 4,715                  
Cumulative Number of Reported Claims | Claim 0                  
Exited Lines Segment | Property Insurance | Accident Year 2022                    
Claims Development [Line Items]                    
Incurred Claims and Allocated Claims Adjustment Expenses, Net of Reinsurance $ 42,818                  
IBNR [4] $ 4,017                  
Cumulative Number of Reported Claims | Claim 0                  
Exited Lines Segment | Casualty Insurance                    
Claims Development [Line Items]                    
Incurred Claims and Allocated Claims Adjustment Expenses, Net of Reinsurance $ 115,152                  
Exited Lines Segment | Casualty Insurance | Accident Year 2019                    
Claims Development [Line Items]                    
Incurred Claims and Allocated Claims Adjustment Expenses, Net of Reinsurance 13,613 13,870 13,518 13,574            
IBNR [5] $ 2,934                  
Cumulative Number of Reported Claims | Claim 0                  
Exited Lines Segment | Casualty Insurance | Accident Year 2020                    
Claims Development [Line Items]                    
Incurred Claims and Allocated Claims Adjustment Expenses, Net of Reinsurance $ 13,697 13,099 13,285              
IBNR [5] $ 4,555                  
Cumulative Number of Reported Claims | Claim 0                  
Exited Lines Segment | Casualty Insurance | Accident Year 2021                    
Claims Development [Line Items]                    
Incurred Claims and Allocated Claims Adjustment Expenses, Net of Reinsurance $ 12,160 12,376                
IBNR [5] $ 8,115                  
Cumulative Number of Reported Claims | Claim 0                  
Exited Lines Segment | Casualty Insurance | Accident Year 2022                    
Claims Development [Line Items]                    
Incurred Claims and Allocated Claims Adjustment Expenses, Net of Reinsurance $ 8,317                  
IBNR [5] $ 5,986                  
Cumulative Number of Reported Claims | Claim 0                  
Exited Lines Segment | Casualty Insurance | Accident Year 2015                    
Claims Development [Line Items]                    
Incurred Claims and Allocated Claims Adjustment Expenses, Net of Reinsurance $ 19,837 20,045 20,677 21,133 21,720 21,243 20,170 $ 18,612    
IBNR [5] $ 864                  
Cumulative Number of Reported Claims | Claim 0                  
Exited Lines Segment | Casualty Insurance | Accident Year 2016                    
Claims Development [Line Items]                    
Incurred Claims and Allocated Claims Adjustment Expenses, Net of Reinsurance $ 16,074 16,256 16,719 17,035 19,423 20,726 $ 21,030      
IBNR [5] $ 1,127                  
Cumulative Number of Reported Claims | Claim 0                  
Exited Lines Segment | Casualty Insurance | Accident Year 2017                    
Claims Development [Line Items]                    
Incurred Claims and Allocated Claims Adjustment Expenses, Net of Reinsurance $ 15,114 15,516 17,056 17,624 18,730 $ 19,683        
IBNR [5] $ 1,518                  
Cumulative Number of Reported Claims | Claim 0                  
Exited Lines Segment | Casualty Insurance | Accident Year 2018                    
Claims Development [Line Items]                    
Incurred Claims and Allocated Claims Adjustment Expenses, Net of Reinsurance $ 16,340 $ 15,979 $ 15,414 $ 15,439 $ 14,835          
IBNR [5] $ 1,721                  
Cumulative Number of Reported Claims | Claim 0                  
[1] Incurred-but-not-reported liabilities plus expected development on reported claims
[2] Incurred-but-not-reported liabilities plus expected development on reported claims
[3] Incurred-but-not-reported liabilities plus expected development on reported claims
[4] Incurred-but-not-reported liabilities plus expected development on reported claims
[5] Incurred-but-not-reported liabilities plus expected development on reported claims