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Commitments and Contingencies (Details) - USD ($)
$ in Thousands
 9 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Dec. 31, 2023
Commitments and Contingencies Disclosure [Abstract]      
Loss Contingency, Receivable     $ 2,500
Loan subject to loss-sharing arrangements, aggregate unpaid principal amount $ 22,300,000   20,800,000
Loan loss accrual 29,900   30,900
Loan loss guarantee reserve 29,000   23,400
Level of risk retained (per claim) 9,000    
Loss Contingency Accrual [Roll Forward]      
Loss Contingency, Receivable     2,500
Loan loss guarantee reserve 29,000   $ 23,400
Unpaid principle balance on repurchased loan 74,250    
Estimated loss on loan repurchase 17,800    
Insurance Claims [Member]      
Loss Contingency Accrual [Roll Forward]      
Loss Contingency Accrual 9,400 $ 2,200  
Loss Contingency Accrual, Provision 300 600  
Loss Contingency Accrual, Provision Adjustment 1,200 5,200  
Loss Contingency Accrual, Payments (7,200) (2,300)  
Loss Contingency Accrual $ 3,700 $ 5,700