v3.26.3
Use of Special Purpose Entities and Variable Interest Entities - Narrative (Details)
$ in Thousands
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2026
USD ($)
entity
Jun. 30, 2026
USD ($)
entity
Mar. 31, 2026
USD ($)
entity
Sep. 30, 2025
USD ($)
Sep. 30, 2026
USD ($)
Sep. 30, 2025
USD ($)
Dec. 31, 2025
USD ($)
Variable Interest Entity [Line Items]              
Number of SPE liquidated | entity 1 4 3        
Primary beneficiary, maximum loss exposure, amount $ 12,900       $ 12,900    
Total residential whole loans 8,700,000       8,700,000   $ 8,800,000
Asset-backed Securities, Securitized Loans and Receivables              
Variable Interest Entity [Line Items]              
Proceeds from issuance of debt         10,298,145   10,061,131
Residential whole loans transferred to consolidated VIEs 6,900,000       6,900,000   7,600,000
Securitized debt 5,900,000       5,900,000   6,300,000
Asset-backed Securities, Securitized Loans and Receivables | Balance Sheet Location [Axis]: us-gaap:OtherAssets              
Variable Interest Entity [Line Items]              
Real estate owned at fair value 45,800       45,800   $ 52,400
Asset-backed Securities, Securitized Loans and Receivables | Senior Bonds              
Variable Interest Entity [Line Items]              
Proceeds from issuance of debt 384,000     $ 672,800 1,900,000 $ 1,200,000  
Proceed from debt net of offering expenses and underwriting discount 384,000     $ 672,800 $ 1,900,000 $ 1,200,000  
Repayments of debt $ 237,600 $ 385,100 $ 470,100