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Loss and Loss Adjustment Expense Reserves (Tables)
9 Months Ended
Sep. 30, 2023
Insurance [Abstract]  
Summary of Liability for Unpaid Claims and Claims Adjustment Expense
The reconciliation of the beginning and ending reserve balances for losses and loss adjustment expenses (“LAE”), net of reinsurance is summarized as follows for the nine months ended September 30, (in millions):
20232022
Reserve for losses and LAE gross of reinsurance recoverables on unpaid losses and LAE as of beginning of the period$293.8 $260.8 
Less: Reinsurance recoverables on unpaid losses and LAE(228.8)(217.0)
Reserve for losses and LAE, net of reinsurance recoverables as of beginning of the period65.0 43.8 
Add: Incurred losses and LAE, net of reinsurance, related to:
Current year153.0 84.9 
Prior years(2.1)(9.3)
Total incurred150.9 75.6 
Deduct: Loss and LAE payments, net of reinsurance, related to:
Current year89.8 45.9 
Prior years15.7 15.7 
Total paid105.5 61.6 
Reserve for losses and LAE, net of reinsurance recoverables at end of period110.4 57.8 
Add: Reinsurance recoverables on unpaid losses and LAE at end of period249.5 263.7 
Reserve for losses and LAE gross of reinsurance recoverables on unpaid losses and LAE as of end of the period$359.9 $321.5