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Reinsurance (Details) - USD ($)
 6 Months Ended 12 Months Ended 18 Months Ended
Jan. 01, 2024
Jun. 30, 2023
Jan. 01, 2023
Dec. 30, 2021
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Losses per occurrence subject to quota share reinsurance coverage           $ 5,000,000      
Excess of loss coverage above quota share coverage           5,000,000      
Catastrophe [Member]                  
In excess of         $ 0        
Initial loss subject to personal lines quota share treaty $ 10,000,000 $ 10,000,000 $ 10,000,000 $ 0       $ 10,000,000 $ 0
Risk retained per catastrophe occurrence   8,750,000 7,400,000 10,000,000       7,400,000 10,000,000
Catastrophe loss coverage in excess of quota share coverage   $ 335,000,000 $ 335,000,000 490,000,000       $ 490,000,000 $ 475,000,000
Catastrophe stub coverage for the period from October 18, 2021 through December 31, 2021       $ 5,000,000          
Reinstatement premium protection   Yes Yes Yes       Yes Yes
Commercial Lines [Member]                  
Risk retained on initial $1,000,000 of losses (7)             $ 750,000    
Losses per occurrence subject to quota share reinsurance coverage             4,500,000    
In excess of             750,000    
Total reinsurance coverage per occurrence             3,750,000    
Excess of loss coverage above quota share coverage             3,750,000    
Personal Lines [Member] [Member] [Member] [Member]                  
Percent ceded 30.00% 30.00% 30.00% 0.00%       30.00% 0.00%
Risk retained on initial $1,000,000 of losses (7) $ 700,000 $ 700,000 $ 700,000 $ 1,000,000       $ 700,000 $ 1,000,000
Losses per occurrence subject to quota share reinsurance coverage 1,000,000 1,000,000 1,000,000 0       1,000,000 0
Excess of loss coverage and facultative facility coverage   8,400,000 8,400,000 8,000,000       8,400,000 8,000,000
In excess of   600,000 600,000 1,000,000       600,000 1,000,000
Total reinsurance coverage per occurrence $ 500,000 8,500,000 8,500,000 8,000,000       8,500,000 8,000,000
Losses per occurrence subject to reinsurance coverage   $ 8,000,000 $ 9,000,000 $ 9,000,000       $ 9,000,000 $ 9,000,000
Expiration date Jan. 01, 2024 Jan. 01, 2024 Jan. 01, 2023         Jan. 01, 2023  
Expiration date- personal lines   Jun. 30, 2023 Jun. 30, 2023 Jun. 30, 2022       Jun. 30, 2022 Jun. 30, 2021
Personal Umbrella                  
Risk retained on initial $1,000,000 of losses (7)         300,000 300,000 300,000    
Losses per occurrence subject to quota share reinsurance coverage         5,000,000 5,000,000 5,000,000    
Total reinsurance coverage per occurrence         $ 4,700,000 $ 4,700,000 $ 4,700,000    
Expiration date         Jun. 30, 2023 Jun. 30, 2022 Jun. 30, 2021    
Percent ceded - first million dollars of coverage         90.00% 90.00% 90.00%    
Percent ceded - excess of one million dollars of coverage         95.00% 95.00% 95.00%