v3.26.1
Investments in Securities - Additional Information (Details) - USD ($)
$ in Thousands
Jun. 30, 2026
Dec. 31, 2025
Debt Securities, Available-for-sale [Line Items]    
Debt securities $ 21,183,644 $ 20,015,749
Trading securities 21,183,644 20,015,749
To-be-Announced Agency Securities    
Debt Securities, Available-for-sale [Line Items]    
Derivative assets (liabilities), net 1,791 0
Total TBA Agency Securities    
Debt Securities, Available-for-sale [Line Items]    
Trading securities $ 603,519 $ 0