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Reserve for Losses and Loss Adjustment Expenses - Incurred and Paid Accident Year Claims Development (Details)
$ 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 ($)
Dec. 31, 2015
USD ($)
Homeowners' Insurance                
Claims Development                
Incurred Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance $ 41,819              
Incurred but Not Reported Liabilities $ 1,153              
Cumulative Number of Claims 18,524              
Cumulative Paid Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance $ 39,041              
Reserve for losses and loss adjustment expense, net of reinsurance 2,778              
Homeowners' Insurance | 2015                
Claims Development                
Incurred Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance $ 1,612 $ 1,643 $ 1,636 $ 1,642 $ 1,636 $ 1,658 $ 1,785 $ 2,048
Cumulative Number of Claims 567              
Cumulative Paid Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance $ 1,612 1,643 1,636 1,634 1,615 1,523 1,379 860
Homeowners' Insurance | 2016                
Claims Development                
Incurred Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance $ 5,604 5,609 5,622 5,636 5,721 5,878 6,069  
Cumulative Number of Claims 1,357              
Cumulative Paid Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance $ 5,604 5,609 5,619 5,607 5,585 5,356 4,120  
Homeowners' Insurance | 2017                
Claims Development                
Incurred Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance 5,681 5,587 6,388 6,630 7,418 9,354    
Incurred but Not Reported Liabilities $ 11              
Cumulative Number of Claims 3,516              
Cumulative Paid Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance $ 5,649 5,586 6,371 6,628 7,375 7,135    
Homeowners' Insurance | 2018                
Claims Development                
Incurred Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance $ 1,529 1,929 1,930 2,008 2,193      
Cumulative Number of Claims 1,017              
Cumulative Paid Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance $ 1,529 1,922 1,922 1,853 1,550      
Homeowners' Insurance | 2019                
Claims Development                
Incurred Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance 676 807 838 914        
Incurred but Not Reported Liabilities $ 36              
Cumulative Number of Claims 1,386              
Cumulative Paid Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance $ 704 685 685 546        
Homeowners' Insurance | 2020                
Claims Development                
Incurred Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance 13,715 15,088 19,100          
Incurred but Not Reported Liabilities $ 106              
Cumulative Number of Claims 4,451              
Cumulative Paid Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance $ 13,161 13,095 13,588          
Homeowners' Insurance | 2021                
Claims Development                
Incurred Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance $ 5,765 8,453            
Cumulative Number of Claims 4,081              
Cumulative Paid Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance $ 5,472 4,351            
Homeowners' Insurance | 2022                
Claims Development                
Incurred Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance 7,237              
Incurred but Not Reported Liabilities $ 1,000              
Cumulative Number of Claims 2,149              
Cumulative Paid Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance $ 5,310              
Special Property                
Claims Development                
Incurred Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance 118,122              
Incurred but Not Reported Liabilities $ 13,598              
Cumulative Number of Claims 4,383              
Cumulative Paid Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance $ 83,788              
Reserve for losses and loss adjustment expense, net of reinsurance 34,334              
Special Property | 2015                
Claims Development                
Incurred Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance $ 692 673 677 678 671 671 719 630
Cumulative Number of Claims | claim 6              
Cumulative Paid Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance $ 692 673 673 666 626 586 438 $ 265
Special Property | 2016                
Claims Development                
Incurred Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance $ 1,521 1,453 1,453 1,454 1,251 1,249 1,381  
Cumulative Number of Claims | claim 26              
Cumulative Paid Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance $ 1,521 1,453 1,453 1,444 1,216 1,064 $ 703  
Special Property | 2017                
Claims Development                
Incurred Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance $ 4,987 4,974 4,264 4,014 3,475 3,071    
Cumulative Number of Claims | claim 110              
Cumulative Paid Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance $ 4,987 4,974 4,269 4,011 3,344 $ 1,967    
Special Property | 2018                
Claims Development                
Incurred Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance $ 6,412 6,021 6,009 6,095 5,970      
Cumulative Number of Claims | claim 176              
Cumulative Paid Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance $ 6,414 6,021 6,009 6,036 $ 2,859      
Special Property | 2019                
Claims Development                
Incurred Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance 3,617 3,140 3,385 3,661        
Incurred but Not Reported Liabilities $ 62              
Cumulative Number of Claims | claim 294              
Cumulative Paid Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance $ 3,466 3,072 2,825 $ 1,633        
Special Property | 2020                
Claims Development                
Incurred Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance 45,850 42,160 42,334          
Incurred but Not Reported Liabilities $ 2,263              
Cumulative Number of Claims | claim 960              
Cumulative Paid Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance $ 42,343 36,127 $ 18,274          
Special Property | 2021                
Claims Development                
Incurred Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance 19,393 21,383            
Incurred but Not Reported Liabilities $ 758              
Cumulative Number of Claims | claim 1,386              
Cumulative Paid Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance $ 17,028 $ 7,004            
Special Property | 2022                
Claims Development                
Incurred Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance 35,650              
Incurred but Not Reported Liabilities $ 10,515              
Cumulative Number of Claims 1,425              
Cumulative Paid Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance $ 7,337