v3.26.3
SEGMENT REPORTING - Schedule of Gross Premiums Written by Line of Business (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Dec. 31, 2025
Segment Reporting          
Gross premiums written $ 181,875 $ 184,377 $ 592,931 $ 611,950  
Net premiums written 142,702 162,682 472,985 546,606  
Net premiums earned 153,429 165,419 469,387 495,523  
Net loss and LAE incurred (84,365) (88,593) (287,603) (311,556)  
Acquisition costs (45,518) (46,445) (136,789) (138,646)  
Underwriting expenses (8,913) (7,989) (24,329) (22,341)  
Deposit interest expense, net (31) (94) (109) (367)  
Underwriting income (loss) 14,602 22,298 20,557 22,613  
Net investment income (loss) 10,493 (2,950) 21,300 15,807  
Corporate and other expenses (5,717) (5,399) (16,176) (14,826)  
Income (loss) from investment in Solasglas (15,133) (14,404) (9,301) (483)  
Foreign exchange gains (losses) (495) (1,994) (5,976) 8,632  
Other income       0  
Interest expense (127) (1,430) (354) (4,038)  
Income (loss) before income tax 3,623 (3,879) 10,050 27,705  
Attritional losses (85,328) (82,051) (254,032) (263,643)  
Large event losses 942        
CAT event losses 2,511        
Large event losses   5,725 3,854 12,815  
CAT event losses   0 29,000 27,016  
Prior year favorable (adverse) loss development 2,490 817 717 8,082  
Total net loss and LAE incurred 84,365 88,593 287,603 311,556  
Total allocated assets 2,290,574 2,134,055 2,290,574 2,134,055 $ 2,169,783
Operating Segments          
Segment Reporting          
Prior year favorable (adverse) loss development     (2,131) 6,126  
Corporate          
Segment Reporting          
Gross premiums written (2) (10) (4) (541)  
Net premiums written (3) (8) (5) (491)  
Net premiums earned (3) (8) (5) (490)  
Net loss and LAE incurred (1,083) (591) (2,845) (1,726)  
Acquisition costs 1 1 1 113  
Underwriting expenses 0 0 0 0  
Deposit interest expense, net 0 0 0 0  
Underwriting income (loss) (1,085) (598) (2,849) (2,103)  
Net investment income (loss) 190 2,697 838 9,175  
Corporate and other expenses (5,085) (4,675) (14,243) (12,928)  
Income (loss) from investment in Solasglas (15,133) (14,404) (9,301) (483)  
Foreign exchange gains (losses) (495) (1,994) (5,976) 8,632  
Other income       0  
Interest expense (127) (1,430) (354) (4,038)  
Income (loss) before income tax (21,735) (20,404) (31,885) (1,745)  
Attritional losses 2 19 3 230  
Large event losses 0        
CAT event losses 0        
Large event losses   0 0 0  
CAT event losses   0 0 0  
Prior year favorable (adverse) loss development 1,085 610 2,848 1,956  
Total net loss and LAE incurred 1,083 591 2,845 1,726  
Total allocated assets 1,555,907 1,513,918 1,555,907 1,513,918  
Open Market | Operating Segments          
Segment Reporting          
Gross premiums written 138,843 154,994 471,392 528,036  
Net premiums written 114,168 140,372 393,712 478,092  
Net premiums earned 125,311 144,427 391,237 434,622  
Net loss and LAE incurred (64,215) (76,590) (234,390) (272,828)  
Acquisition costs (39,797) (40,069) (119,408) (121,850)  
Underwriting expenses (6,075) (5,446) (16,420) (15,104)  
Deposit interest expense, net (31) (94) (109) (367)  
Underwriting income (loss) 15,193 22,228 20,910 24,473  
Net investment income (loss) 4,329 5,623 13,873 17,023  
Corporate and other expenses 0 0 0 0  
Income (loss) before income tax 19,522 27,851 34,783 41,496  
Attritional losses (68,393) (70,010) (207,953) (228,187)  
Large event losses 942        
CAT event losses 2,511        
Large event losses   5,725 3,854 12,815  
CAT event losses   0 29,000 27,016  
Prior year favorable (adverse) loss development (725) 855 (6,417) 4,810  
Total net loss and LAE incurred 64,215 76,590 234,390 272,828  
Total allocated assets 554,326 489,755 554,326 489,755  
Innovations | Operating Segments          
Segment Reporting          
Gross premiums written 43,034 29,393 121,543 84,455  
Net premiums written 28,537 22,318 79,278 69,005  
Net premiums earned 28,121 21,000 78,155 61,391  
Net loss and LAE incurred (19,067) (11,412) (50,368) (37,002)  
Acquisition costs (5,722) (6,377) (17,382) (16,909)  
Underwriting expenses (2,838) (2,543) (7,909) (7,237)  
Deposit interest expense, net 0 0 0 0  
Underwriting income (loss) 494 668 2,496 243  
Net investment income (loss) 5,974 (11,270) 6,589 (10,391)  
Corporate and other expenses (632) (724) (1,933) (1,898)  
Income (loss) before income tax 5,836 (11,326) 7,152 (12,046)  
Attritional losses (16,937) (12,060) (46,082) (35,686)  
Large event losses 0        
CAT event losses 0        
Large event losses   0 0 0  
CAT event losses   0 0 0  
Prior year favorable (adverse) loss development 2,130 (648) 4,286 1,316  
Total net loss and LAE incurred 19,067 11,412 50,368 37,002  
Total allocated assets $ 180,341 $ 130,382 $ 180,341 $ 130,382