v3.26.1
Loss reserves - Activity for the Liability for Loss Reserves (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]    
Gross loss reserves, beginning balance $ 572,470  
Gross loss reserves, ending balance 590,393  
Domestic mortgage insurance    
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]    
Gross loss reserves, beginning balance 566,809 $ 520,032
Reinsurance recoverable, beginning balance 3,326 2,909
Net loss reserves, beginning balance 563,483 517,123
Losses and LAE incurred related to current accident year 79,309 77,842
Losses and LAE incurred related to prior accident years (46,214) (51,789)
Total incurred 33,095 26,053
Losses and LAE paid related to current accident year (105) (99)
Losses and LAE paid related to prior accident years (16,915) (8,395)
Total paid (17,020) (8,494)
Net loss reserves, ending balance 579,558 534,682
Reinsurance recoverable, ending balance 4,848 2,798
Gross loss reserves, ending balance $ 584,406 $ 537,480