v3.26.3
Investment Securities Available For Sale, at Fair Value - Schedule of Realized Gain or Loss Activity (Details) - USD ($)
 3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Debt Securities, Available-for-sale [Line Items]        
Sales Proceeds $ 0 $ 0 $ 293,348,000 $ 663,336,000
Realized Gains     291,000 3,752,000
Realized Losses     (5,353,000) (30,570,000)
Net Realized Gains (Losses)     (5,062,000) (26,818,000)
U.S. Treasury securities        
Debt Securities, Available-for-sale [Line Items]        
Sales Proceeds     293,348,000 658,763,000
Realized Gains     291,000 3,700,000
Realized Losses     (5,353,000) (30,570,000)
Net Realized Gains (Losses)     $ (5,062,000) (26,870,000)
Non-Agency RMBS        
Debt Securities, Available-for-sale [Line Items]        
Sales Proceeds       4,573,000
Realized Gains       52,000
Realized Losses       0
Net Realized Gains (Losses)       $ 52,000