v3.25.2
Loss reserves - Summary of Liability For Unpaid Claims And Claim Adjustment Expenses (Details) - USD ($)
$ in Thousands
Jun. 30, 2025
Dec. 31, 2024
Jun. 30, 2024
Dec. 31, 2023
Effects of Reinsurance [Line Items]        
Loss reserves $ 551,940 $ 524,715    
Domestic mortgage insurance        
Effects of Reinsurance [Line Items]        
Loss reserves 546,310 520,032 $ 506,710 $ 517,515
Other reserves        
Effects of Reinsurance [Line Items]        
Loss reserves $ 5,630 $ 4,683