v3.26.3
Segment Reporting (Details)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2026
USD ($)
Jun. 30, 2026
USD ($)
Mar. 31, 2026
USD ($)
Sep. 30, 2025
USD ($)
Jun. 30, 2025
USD ($)
Mar. 31, 2025
USD ($)
Sep. 30, 2026
USD ($)
Sep. 30, 2025
USD ($)
Segment Reporting [Line Items]                
Premiums Earned, Net $ 423,472     $ 410,957     $ 1,247,928 $ 1,160,360
Fee income 11,099     10,300     34,035 30,655
Net investment income 58,265     49,604     169,428 139,896
Change in the fair value of equity securities (37,769)     23,717     10,071 55,376
Net realized investment gains (losses) (419)     2,159     8,029 2,832
Debt Securities, Available-for-Sale, Excluding Accrued Interest, Allowance for Credit Loss, Period Increase (Decrease) 1     4     (26) (11)
Other income 149     764     561 1,608
Revenues 454,798     497,505     1,470,026 1,390,716
Current year             755,883 723,350
Prior years             (57,763) (45,853)
Salaries, bonuses and employee benefits 33,100     33,300     99,100 95,000
Current period change for estimated uncollectible premiums 3,006     2,341     7,047 7,242
Interest Expense 3,220     2,569     9,710 7,664
Total income tax expense 25,490     37,232     96,526 94,484
Net income 98,129 $ 175,874 $ 112,554 141,646 $ 134,121 $ 89,227 $ 386,557 364,994
Number of Reportable Segments             1  
Catastrophe losses [Member]                
Segment Reporting [Line Items]                
Current year               27,500
Operating Segments | Excess and Surplus Lines Segment                
Segment Reporting [Line Items]                
Premiums Earned, Net 423,472     410,957     $ 1,247,928 1,160,360
Fee income 11,099     10,300     34,035 30,655
Net investment income 58,265     49,604     169,428 139,896
Change in the fair value of equity securities (37,769)     23,717     10,071 55,376
Net realized investment gains (losses) (419)     2,159     8,029 2,832
Debt Securities, Available-for-Sale, Excluding Accrued Interest, Allowance for Credit Loss, Period Increase (Decrease) 1     4     (26) (11)
Other income 149     764     561 1,608
Revenues 454,798     497,505     1,470,026 1,390,716
Current year 249,570     241,704     746,721 695,851
Prior years (19,664)     (15,758)     (57,763) (45,853)
Net commissions incurred 51,122     45,275     145,234 120,682
Salaries, bonuses and employee benefits 33,097     33,350     99,062 95,046
Current period change for estimated uncollectible premiums 3,006     2,341     7,047 7,242
Depreciation, Depletion and Amortization, Nonproduction 1,634     1,080     4,481 3,309
Interest Expense 3,220     2,569     9,710 7,664
Selling, General and Administrative Expense 7,021     6,850     23,289 19,798
Total income tax expense 25,490     37,232     96,526 94,484
Net income 98,129     141,646     386,557 364,994
Operating Segments | Excess and Surplus Lines Segment | Catastrophe losses [Member]                
Segment Reporting [Line Items]                
Current year $ 2,173     $ 1,216     $ 9,162 $ 27,499