v3.26.1
Related-Party Transactions - Schedule of Reinsurance Agreement (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Related Party Transaction [Line Items]          
Earned premium, net $ 251,956 $ 177,785 $ 491,598 $ 347,140  
Total revenue 354,822 379,309 666,652 707,645  
Losses and loss adjustment expenses, net 110,709 75,213 208,628 146,343  
Policy acquisition costs, net (83,641) (82,938) (185,563) (160,271)  
Underwriting and other insurance expenses 62,947 1,222 122,535 2,579  
Total expenses (352,590) (325,946) (685,357) (621,500)  
Accounts receivable 27,313   27,313   $ 98,872
Premiums receivable 120,382   120,382   180,529
Reinsurance recoverables 12,346   12,346   15,296
Other assets 209,435   209,435   207,986
TOTAL ASSETS 2,148,431   2,148,431   2,093,976
Accounts payable and accrued expenses 89,829   89,829   111,947
Losses payable and reserves for unpaid losses and loss adjustment expenses 241,705   241,705   264,204
Due to insurers 27,100   27,100   94,930
Other liabilities 95,213   95,213   61,684
TOTAL LIABILITIES 1,413,625   1,413,625   1,346,950
Markel | Reinsurance Agreement | Affiliated Entity          
Related Party Transaction [Line Items]          
Earned premium, net 260,982 182,913 505,790 357,974  
Commission and fee revenue 1,817 127,454 3,523 221,427  
Total revenue 262,799 310,367 509,313 579,401  
Losses and loss adjustment expenses, net 105,727 74,598 197,233 154,509  
Policy acquisition costs, net 75,477 84,868 175,426 164,335  
Underwriting and other insurance expenses 625 0 2,742 0  
Total expenses (181,829) (159,466) (375,401) (318,844)  
Accounts receivable 1,526   1,526   1,321
Premiums receivable 0   0   174,169
Reinsurance recoverables 1,181   1,181   1,958
Other assets 1,115   1,115   0
TOTAL ASSETS 3,822   3,822   177,448
Accounts payable and accrued expenses 1,422   1,422   0
Losses payable and reserves for unpaid losses and loss adjustment expenses 0   0   247,758
Due to insurers 5,231   5,231   88,888
Ceding commissions payable 0   0   83,494
Other liabilities 1,477   1,477   2,470
TOTAL LIABILITIES 8,130   8,130   422,610
State Farm | Reinsurance Agreement | Affiliated Entity          
Related Party Transaction [Line Items]          
Earned premium, net 5,467 4,735 10,674 9,191  
Losses and loss adjustment expenses, net 1,910 1,420 3,472 7,507  
Policy acquisition costs, net (2,843) (2,463) (5,551) (4,780)  
Total expenses (4,753) $ (3,883) (9,023) $ (12,287)  
Reinsurance recoverables 5,295   5,295   6,668
Other assets 3,075   3,075   2,716
TOTAL ASSETS 8,370   8,370   9,384
Other liabilities 5,914   5,914   5,224
TOTAL LIABILITIES $ 5,914   $ 5,914   $ 5,224