v3.25.4
RELATED PARTY TRANSACTIONS AND MAJOR CUSTOMERS - Schedule of Reinsurance Agreements (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Related Party Transaction [Line Items]      
Net premiums written $ 11,738,420 $ 11,733,066 $ 8,862,366
Net premiums earned 10,746,974 10,815,336 8,072,193
Net claims and claim expenses incurred (538,731) (296,775) (376,853)
Acquisition expenses 2,550,823 2,643,867 1,875,034
Reserve for claims and claim expenses 22,302,345 21,303,491 20,486,869
Tower Hill Companies | Related Party      
Related Party Transaction [Line Items]      
Net premiums written 86,423 115,073 96,810
Net premiums earned 89,401 118,993 83,256
Net claims and claim expenses incurred (5,427) 94,486 (9,753)
Acquisition expenses 13,411 14,199 $ 12,730
Premiums receivable (payable) 35,877 31,925  
Reserve for claims and claim expenses $ 50,992 $ 95,215