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Unpaid Loss and Loss Adjustment Expense - Additional Information (Details) - USD ($)
$ in Millions
6 Months Ended
Jul. 01, 2022
Jun. 30, 2022
Jun. 30, 2021
Effects of Reinsurance [Line Items]      
Favorable development on net loss and LAE reserves   $ (1.2) $ (0.4)
Current accident year incurred loss and LAE   53.7 $ 29.9
Reinsurance program, minimum losses threshold   $ 80.0  
Reinsurance Contract [Axis]: Non-Proportional Reinsurance Contracts      
Effects of Reinsurance [Line Items]      
Percent of contracts subject to participation through reinsurance   25.00%  
Reinsurance Contract [Axis]: Proportional Reinsurance Contracts      
Effects of Reinsurance [Line Items]      
Percent of contracts subject to participation through reinsurance     75.00%
Ceded commission percentage   25.00%  
Claims funding percentage   75.00%  
Reinsurance Contract [Axis]: Proportional Reinsurance Contracts | Subsequent event      
Effects of Reinsurance [Line Items]      
Percent of contracts subject to participation through reinsurance 55.00%    
Winter Storm Uri      
Effects of Reinsurance [Line Items]      
Current accident year incurred loss and LAE     $ 6.2