v3.26.1
Segment Information - Schedule of Segment Results (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
Segment Reporting [Line Items]          
Gross written premiums $ 268,899 $ 378,003 $ 505,272 $ 672,364  
Net earned premiums 139,018 152,609 274,730 304,511  
Fee income 34 828 124 1,660  
Total incurred losses and loss adjustment expenses 99,105 113,141 207,265 212,666  
Less: losses and loss adjustment expense - retroactive reinsurance 6,927 9,239 21,116 7,311  
Losses and loss adjustment expenses excluding retroactive reinsurance 92,178 103,902 186,149 205,355  
Other operating expenses:          
Net commissions 14,823 12,563 28,481 24,712  
Employee compensation 20,839 23,422 45,322 51,083  
All other operating expenses 11,539 11,486 21,449 22,236  
Total 47,201 47,471 95,252 98,031  
Underwriting profit (loss) (327) 2,064 (6,547) 2,785  
Segment revenues 161,344 174,843 312,728 347,132  
Net investment income 20,277 20,516 41,604 40,524  
Interest expense 5,613 5,805 11,202 11,346  
Segment goodwill 181,831 181,831 181,831 181,831 $ 181,831
Segment assets 4,773,078 5,018,322 4,773,078 5,018,322  
Excess & Surplus Lines          
Segment Reporting [Line Items]          
Less: losses and loss adjustment expense - retroactive reinsurance 6,927 9,239 21,116 7,311  
Operating Segments | Excess & Surplus Lines          
Segment Reporting [Line Items]          
Gross written premiums 250,170 300,444 462,455 513,687  
Net earned premiums 137,306 141,370 269,132 278,398  
Fee income 0 0 0 0  
Total incurred losses and loss adjustment expenses 96,687 103,099 200,461 189,975  
Less: losses and loss adjustment expense - retroactive reinsurance 6,927 9,239 21,116 7,311  
Losses and loss adjustment expenses excluding retroactive reinsurance 89,760 93,860 179,345 182,664  
Other operating expenses:          
Net commissions 16,289 14,975 31,926 29,976  
Employee compensation 14,485 15,497 30,470 31,897  
All other operating expenses 6,843 5,331 12,806 10,496  
Total 37,617 35,803 75,202 72,369  
Underwriting profit (loss) 9,929 11,707 14,585 23,365  
Segment revenues 155,337 158,320 298,768 309,856  
Net investment income 16,179 15,941 33,453 31,159  
Interest expense 0 0 0 0  
Segment goodwill 181,831 181,831 181,831 181,831  
Segment assets 3,711,484 3,639,964 3,711,484 3,639,964  
Operating Segments | Specialty Admitted Insurance          
Segment Reporting [Line Items]          
Gross written premiums 18,729 77,559 42,817 158,677  
Net earned premiums 1,712 11,239 5,598 26,113  
Fee income 34 828 124 1,660  
Total incurred losses and loss adjustment expenses 2,418 10,042 6,804 22,691  
Less: losses and loss adjustment expense - retroactive reinsurance 0 0 0 0  
Losses and loss adjustment expenses excluding retroactive reinsurance 2,418 10,042 6,804 22,691  
Other operating expenses:          
Net commissions (1,466) (2,412) (3,445) (5,264)  
Employee compensation 1,725 2,612 3,492 5,423  
All other operating expenses 1,876 3,246 3,473 6,650  
Total 2,135 3,446 3,520 6,809  
Underwriting profit (loss) (2,807) (1,421) (4,602) (1,727)  
Segment revenues 5,902 16,166 13,780 36,263  
Net investment income 4,065 4,224 8,115 8,541  
Interest expense 0 0 0 0  
Segment goodwill 0 0 0 0  
Segment assets 1,013,718 1,351,271 1,013,718 1,351,271  
Corporate and Other | Corporate and Other          
Segment Reporting [Line Items]          
Gross written premiums 0 0 0 0  
Net earned premiums 0 0 0 0  
Fee income 0 0 0 0  
Total incurred losses and loss adjustment expenses 0 0 0 0  
Less: losses and loss adjustment expense - retroactive reinsurance 0 0 0 0  
Losses and loss adjustment expenses excluding retroactive reinsurance 0 0 0 0  
Other operating expenses:          
Net commissions 0 0 0 0  
Employee compensation 4,629 5,313 11,360 13,763  
All other operating expenses 2,820 2,909 5,170 5,090  
Total 7,449 8,222 16,530 18,853  
Underwriting profit (loss) (7,449) (8,222) (16,530) (18,853)  
Segment revenues 105 357 180 1,013  
Net investment income 33 351 36 824  
Interest expense 5,613 5,805 11,202 11,346  
Segment goodwill 0 0 0 0  
Segment assets $ 47,876 $ 27,087 $ 47,876 $ 27,087