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Reserve for Losses and Loss Adjustment Expenses - Narrative (Details)
$ in Thousands
 3 Months Ended 12 Months Ended 21 Months Ended
Jun. 30, 2022
Mar. 31, 2022
Dec. 31, 2024
USD ($)
loan
Dec. 31, 2023
USD ($)
Dec. 31, 2022
USD ($)
Dec. 31, 2021
Liability for Claims and Claims Adjustment Expense [Line Items]            
Incurred claims and claim adjustment expenses     $ 21,743 $ 10,752 $ 4,731  
Favorable prior year development     95,817 109,649 274,076  
Reserve for losses and LAE, for prior years     118,400 81,400    
Net reserves acquired during the period     $ 0 14,049 0  
Reduction of reserves on hurricane-related defaults         $ 164,100  
Number of loans increased in default | loan     3,620      
Hurricane            
Liability for Claims and Claims Adjustment Expense [Line Items]            
Number of loans increased in default | loan     2,119      
Reinsurance Risk In Force Affected | Reinsurer Concentration Risk | Wildfire            
Liability for Claims and Claims Adjustment Expense [Line Items]            
Concentration risk, percentage     0.10%      
Agents National Title            
Liability for Claims and Claims Adjustment Expense [Line Items]            
Reinsurance recoverables       $ 100    
COVID-19            
Liability for Claims and Claims Adjustment Expense [Line Items]            
Reserve rate 2.00% 4.00%       7.00%