v3.26.1
Segment Information - Schedule of Segment Results (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Dec. 31, 2025
Segment Reporting Information [Line Items]      
Gross written premiums $ 236,373 $ 294,361  
Net earned premiums 135,712 151,902  
Fee income 90 832  
Total incurred losses and loss and adjustment expenses 108,160 99,525  
Less: losses and loss adjustment expense - retroactive reinsurance 14,189 (1,928)  
Losses and loss adjustment expenses excluding retroactive reinsurance 93,971 101,453  
Other operating expenses:      
Net commissions 13,658 12,149  
Employee compensation 24,483 27,660  
All other operating expenses 9,910 10,751  
Total 48,051 50,560  
Underwriting profit (loss) (6,220) 721  
Segment revenues 151,384 172,289  
Net investment income 21,327 20,008  
Interest expense 5,589 5,541  
Segment goodwill 181,831 181,831 $ 181,831
Segment assets 4,761,809 4,949,015  
Excess & Surplus Lines      
Segment Reporting Information [Line Items]      
Less: losses and loss adjustment expense - retroactive reinsurance 14,189 (1,928)  
Operating Segments | Excess & Surplus Lines      
Segment Reporting Information [Line Items]      
Gross written premiums 212,285 213,243  
Net earned premiums 131,826 137,028  
Fee income 0 0  
Total incurred losses and loss and adjustment expenses 103,774 86,876  
Less: losses and loss adjustment expense - retroactive reinsurance 14,189 (1,928)  
Losses and loss adjustment expenses excluding retroactive reinsurance 89,585 88,804  
Other operating expenses:      
Net commissions 15,637 15,001  
Employee compensation 15,985 16,400  
All other operating expenses 5,963 5,165  
Total 37,585 36,566  
Underwriting profit (loss) 4,656 11,658  
Segment revenues 143,431 151,536  
Net investment income 17,274 15,218  
Interest expense 0 0  
Segment goodwill 181,831 181,831  
Segment assets 3,638,838 3,523,455  
Operating Segments | Specialty Admitted Insurance      
Segment Reporting Information [Line Items]      
Gross written premiums 24,088 81,118  
Net earned premiums 3,886 14,874  
Fee income 90 832  
Total incurred losses and loss and adjustment expenses 4,386 12,649  
Less: losses and loss adjustment expense - retroactive reinsurance 0 0  
Losses and loss adjustment expenses excluding retroactive reinsurance 4,386 12,649  
Other operating expenses:      
Net commissions (1,979) (2,852)  
Employee compensation 1,767 2,811  
All other operating expenses 1,597 3,404  
Total 1,385 3,363  
Underwriting profit (loss) (1,795) (306)  
Segment revenues 7,878 20,097  
Net investment income 4,050 4,317  
Interest expense 0 0  
Segment goodwill 0 0  
Segment assets 1,062,592 1,359,670  
Corporate and Other | Corporate and Other      
Segment Reporting Information [Line Items]      
Gross written premiums 0 0  
Net earned premiums 0 0  
Fee income 0 0  
Total incurred losses and loss and adjustment expenses 0 0  
Less: losses and loss adjustment expense - retroactive reinsurance 0 0  
Losses and loss adjustment expenses excluding retroactive reinsurance 0 0  
Other operating expenses:      
Net commissions 0 0  
Employee compensation 6,731 8,449  
All other operating expenses 2,350 2,182  
Total 9,081 10,631  
Underwriting profit (loss) (9,081) (10,631)  
Segment revenues 75 656  
Net investment income 3 473  
Interest expense 5,589 5,541  
Segment goodwill 0 0  
Segment assets $ 60,379 $ 65,890