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Loss and Loss Adjustment Expense Reserves (Tables)
3 Months Ended
Mar. 31, 2025
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 three months ended March 31, (in millions):
20252024
Reserve for losses and LAE gross of reinsurance recoverables on unpaid losses and LAE as of beginning of the period$350.0 $322.5 
Less: Reinsurance recoverables on unpaid losses and LAE(229.9)(221.4)
Reserve for losses and LAE, net of reinsurance recoverables as of beginning of the period120.1 101.1 
Add: Incurred losses and LAE, net of reinsurance, related to:
Current year95.4 52.6 
Prior years(3.0)— 
Total incurred92.4 52.6 
Deduct: Loss and LAE payments, net of reinsurance, related to:
Current year50.3 20.3 
Prior years26.8 22.2 
Total paid77.1 42.5 
Reserve for losses and LAE, net of reinsurance recoverables at end of period135.4 111.2 
Add: Reinsurance recoverables on unpaid losses and LAE at end of period265.4 225.4 
Reserve for losses and LAE gross of reinsurance recoverables on unpaid losses and LAE as of end of the period$400.8 $336.6