v3.25.2
Regulatory Information - Schedule of Statutory Net Income (loss), Surplus, Contingency Reserve and Risk-to-Capital Ratio (Details) - NMIC and Re One combined
$ in Thousands
Jun. 30, 2025
USD ($)
Dec. 31, 2024
USD ($)
Statutory Accounting Practices [Line Items]    
Statutory surplus $ 951,592 $ 984,362
Contingency reserve 2,076,510 1,905,990
Statutory capital $ 3,028,102 $ 2,890,352
Risk-to-capital 13.1 12.7