v3.25.2
Regulatory Information - Narrative (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 02, 2025
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Dec. 31, 2025
Dec. 31, 2024
NMIC and Re One combined              
Statutory Accounting Practices [Line Items]              
Net income amount   $ 30,500 $ 36,000 $ 67,300 $ 70,700    
Statutory capital   3,028,102   3,028,102     $ 2,890,352
Payments of ordinary dividends $ 98,400            
NMIC and Re One combined | Forecast              
Statutory Accounting Practices [Line Items]              
Aggregate dividend capacity           $ 98,400  
Re One              
Statutory Accounting Practices [Line Items]              
Statutory capital   $ 2,100   $ 2,100     $ 2,100