v3.26.1
Reserve for Losses and Loss Adjustment Expenses - Schedule of Reconciliation of The Beginning And Ending Reserve Balances (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]        
Gross reserves for losses and loss adjustment expenses, beginning of year     $ 1,129,936 $ 756,859
Reinsurance recoverable on unpaid losses, beginning of year     381,697 246,915
Net reserves for unpaid losses and loss adjustment expenses, beginning of year     748,239 509,944
Net incurred losses and loss adjustment expenses related to:        
Current accident year     187,672 151,768
Prior accident years     755 559
Liability for unpaid claims and claims adjustment expense, incurred claims, total $ 96,945 $ 78,900 188,427 152,327
Net paid losses and loss adjustment expenses related to:        
Current accident year     1,952 1,547
Prior accident years     70,170 26,690
Liability for unpaid claims and claims adjustment expense, claims paid, total     72,122 28,237
Net reserves for unpaid losses and loss adjustment expenses, end of period 864,544 634,034 864,544 634,034
Reinsurance recoverable on unpaid losses, end of period 454,100 316,685 454,100 316,685
Gross reserves for losses and loss adjustment expenses, end of period $ 1,318,644 $ 950,719 $ 1,318,644 $ 950,719