Quarterly report pursuant to Section 13 or 15(d)

Available-for-Sale Securities, at Fair Value - Allowance for Credit Losses and Unrealized Loss (Details)

v3.24.3
Available-for-Sale Securities, at Fair Value - Allowance for Credit Losses and Unrealized Loss (Details) - USD ($)
$ in Thousands
Sep. 30, 2024
Dec. 31, 2023
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]    
Less than 12 Months, Estimated Fair Value $ 1,907 $ 6,270,731
Less than 12 Months, Gross Unrealized Losses (85) (199,449)
12 Months or Longer, Estimated Fair Value 4,142,328 0
12 Months or Longer, Gross Unrealized Losses (120,745) 0
Total, Estimated Fair Value 4,144,235 6,270,731
Total, Gross Unrealized Losses (120,830) (199,449)
Agency    
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]    
Less than 12 Months, Estimated Fair Value 1,275 6,269,848
Less than 12 Months, Gross Unrealized Losses (38) (199,276)
12 Months or Longer, Estimated Fair Value 4,141,819 0
12 Months or Longer, Gross Unrealized Losses (120,723) 0
Total, Estimated Fair Value 4,143,094 6,269,848
Total, Gross Unrealized Losses (120,761) (199,276)
Non-Agency    
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]    
Less than 12 Months, Estimated Fair Value 632 883
Less than 12 Months, Gross Unrealized Losses (47) (173)
12 Months or Longer, Estimated Fair Value 509 0
12 Months or Longer, Gross Unrealized Losses (22) 0
Total, Estimated Fair Value 1,141 883
Total, Gross Unrealized Losses $ (69) $ (173)