v3.26.1
Segment Information - Financial Data by Segment (Details) - Operating Segments [Member] - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Revenues:        
Net premiums earned $ 222,574 $ 231,775 $ 443,932 $ 464,476
Net losses and loss expenses 131,871 151,508 273,338 283,537
Other underwriting expenses 79,287 74,900 160,666 157,895
Policyholder dividends 560 819 1,212 1,578
Total expenses 211,718 227,227 435,216 443,010
SAP underwriting (loss) income 10,856 4,548 8,716 21,466
GAAP adjustments (1,083) 840 1,452 3,405
GAAP underwriting income 9,773 5,388 10,168 24,871
Net investment income 14,491 12,540 28,778 24,524
Investment gains 3,267 1,544 2,788 1,073
Other 17 952 (63) 1,117
Total segment revenues 240,332 245,859 475,498 490,073
Other 787 1,289 1,617 1,880
Total revenues 241,119 247,148 477,115 491,953
Income before income tax expense 27,548 20,424 41,671 51,585
Investments [Member]        
Revenues:        
Net premiums earned 0 0 0 0
Net losses and loss expenses 0 0 0 0
Other underwriting expenses 0 0 0 0
Policyholder dividends 0 0 0 0
Total expenses 0 0 0 0
SAP underwriting (loss) income 0 0 0 0
Net investment income 14,491 12,540 28,778 24,524
Investment gains 3,267 1,544 2,788 1,073
Total segment revenues 17,758 14,084 31,566 25,597
Commercial Lines [Member]        
Revenues:        
Net premiums earned 141,516 138,527 280,480 274,743
Net losses and loss expenses 89,431 91,518 184,789 172,839
Other underwriting expenses 54,706 49,982 113,188 105,492
Policyholder dividends 560 819 1,212 1,578
Total expenses 144,697 142,319 299,189 279,909
SAP underwriting (loss) income (3,181) (3,792) (18,709) (5,166)
Net investment income 0 0 0 0
Investment gains 0 0 0 0
Total segment revenues 141,516 138,527 280,480 274,743
Personal Lines [Member]        
Revenues:        
Net premiums earned 81,058 93,248 163,452 189,733
Net losses and loss expenses 42,440 59,990 88,549 110,698
Other underwriting expenses 24,581 24,918 47,478 52,403
Policyholder dividends 0 0   0
Total expenses 67,021 84,908 136,027 163,101
SAP underwriting (loss) income 14,037 8,340 27,425 26,632
Net investment income 0 0 0 0
Investment gains 0 0 0 0
Total segment revenues $ 81,058 $ 93,248 $ 163,452 $ 189,733