v3.26.3
Segment Reporting - Schedule of Segment Reporting (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Revenues:        
Net premiums earned $ 290,672 $ 246,332 $ 827,529 $ 740,989
Net investment income 62,952 59,795 183,819 177,294
Realized investment gains (losses), net (1,626) (425) (1,884) (735)
Income (loss) from other invested assets 10,724 1,770 40,288 13,644
Other income 11,461 4,358 23,189 17,339
Total revenues 374,183 311,830 1,072,941 948,531
Losses and expenses:        
Provision for losses and LAE 83,489 44,922 180,666 93,264
Compensation and benefits 31,195 29,176 98,354 99,587
Premium and other taxes 6,466 5,930 19,467 19,328
Acquisition costs, net 11,797 (6,570) 15,240 (19,128)
Other underwriting and operating expenses 34,032 30,962 98,670 93,600
Net operating expenses before allocations 83,490 59,498 231,731 193,387
Operating expenses after allocations 83,490 59,498 231,731 193,387
Interest expense 8,162 8,251 24,458 24,547
Income before income taxes 199,042 199,159 636,086 637,333
Corporate expense allocations        
Losses and expenses:        
Net operating expenses before allocations (8,775) (7,583) (29,607) (29,839)
Corporate & Other        
Revenues:        
Net premiums earned 15,670 14,345 48,253 41,007
Net investment income 11,193 10,228 34,980 31,205
Realized investment gains (losses), net (15) 2 9 (83)
Income (loss) from other invested assets 4,771 2,375 15,598 7,421
Other income 1,878 1,967 7,151 6,924
Total revenues 33,497 28,917 105,991 86,474
Losses and expenses:        
Provision for losses and LAE 748 687 2,262 2,946
Compensation and benefits 14,357 12,608 46,035 46,336
Premium and other taxes 461 (88) 1,442 1,735
Acquisition costs, net 0 0 0 0
Other underwriting and operating expenses 22,340 20,337 63,482 61,074
Net operating expenses before allocations 37,158 32,857 110,959 109,145
Operating expenses after allocations 28,383 25,274 81,352 79,306
Interest expense 8,162 8,251 24,458 24,547
Income before income taxes (3,796) (5,295) (2,081) (20,325)
Mortgage Insurance | Operating Segments        
Revenues:        
Net premiums earned 210,958 215,683 642,283 654,069
Net investment income 46,218 44,265 132,540 130,731
Realized investment gains (losses), net (1,611) (427) (1,893) (652)
Income (loss) from other invested assets 5,953 (605) 24,690 6,223
Other income 7,412 800 10,551 3,962
Total revenues 268,930 259,716 808,171 794,333
Losses and expenses:        
Provision for losses and LAE 51,709 44,170 118,720 90,213
Compensation and benefits 15,136 15,388 46,651 49,665
Premium and other taxes 5,993 6,010 17,981 17,558
Acquisition costs, net (7,994) (7,057) (23,142) (20,257)
Other underwriting and operating expenses 10,743 9,735 32,272 29,868
Net operating expenses before allocations 23,878 24,076 73,762 76,834
Operating expenses after allocations 31,895 31,157 101,407 105,698
Interest expense 0 0 0 0
Income before income taxes $ 185,326 $ 184,389 $ 588,044 $ 598,422
Loss ratio 24.50% 20.50% 18.50% 13.80%
Expense ratio 15.10% 14.40% 15.80% 16.20%
Combined ratio 39.60% 34.90% 34.30% 30.00%
Mortgage Insurance | Corporate expense allocations        
Losses and expenses:        
Net operating expenses before allocations $ 8,017 $ 7,081 $ 27,645 $ 28,864
Reinsurance | Operating Segments        
Revenues:        
Net premiums earned 64,044 16,304 136,993 45,913
Net investment income 5,541 5,302 16,299 15,358
Realized investment gains (losses), net 0 0 0 0
Income (loss) from other invested assets 0 0 0 0
Other income 2,171 1,591 5,487 6,453
Total revenues 71,756 23,197 158,779 67,724
Losses and expenses:        
Provision for losses and LAE 31,032 65 59,684 105
Compensation and benefits 1,702 1,180 5,668 3,586
Premium and other taxes 12 8 44 35
Acquisition costs, net 19,791 487 38,382 1,129
Other underwriting and operating expenses 949 890 2,916 2,658
Net operating expenses before allocations 22,454 2,565 47,010 7,408
Operating expenses after allocations 23,212 3,067 48,972 8,383
Interest expense 0 0 0 0
Income before income taxes $ 17,512 $ 20,065 $ 50,123 $ 59,236
Loss ratio 48.50% 0.40% 43.60% 0.20%
Expense ratio 36.20% 18.80% 35.70% 18.30%
Combined ratio 84.70% 19.20% 79.30% 18.50%
Reinsurance | Corporate expense allocations        
Losses and expenses:        
Net operating expenses before allocations $ 758 $ 502 $ 1,962 $ 975