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Residential Loans and Residential Loans Held for Sale, at Fair Value - Schedule of Activity of Residential Loans Held for Sale Since Acquisition (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Jun. 30, 2026
Dec. 31, 2025
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]            
Principal balance of loans transferred from residential loans held for sale to residential loans     $ (727,973) $ (213,811)    
Residential loans            
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]            
Principal balance of loans acquired through business combination   $ 142,324        
Principal balance of loans originated $ 376,458 382,443 1,183,397      
Principal balance of loans sold to third parties (122,616) (213,333) (404,509)      
Proceeds from repayments (527) (137) (1,638)      
Principal balance of loans transferred from residential loans held for sale to residential loans (163,250) (208,858) (709,329)      
Principle balance $ 147,591 $ 102,439 $ 147,591 $ 102,439 $ 57,526 $ 78,915