Annual report [Section 13 and 15(d), not S-K Item 405]

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

v3.25.4
Available-for-Sale Securities, at Fair Value - Allowance for Credit Losses and Unrealized Loss (Details)
$ in Thousands
Dec. 31, 2025
USD ($)
numberOfPosition
Security
Dec. 31, 2024
USD ($)
numberOfPosition
Security
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]    
Debt securities, available-for-sale, number of positions | Security 968 632
Debt securities, available-for-sale, continuous unrealized loss position, less than 12 months, number of positions | numberOfPosition 70 159
Debt securities, available-for-sale, continuous unrealized loss position, 12 months or longer, number of positions | numberOfPosition 202 370
Less than 12 Months, Estimated Fair Value $ 660,703 $ 3,252,418
Less than 12 Months, Gross Unrealized Losses (2,084) (53,374)
12 Months or Longer, Estimated Fair Value 1,885,594 3,845,019
12 Months or Longer, Gross Unrealized Losses (41,509) (270,700)
Total, Estimated Fair Value 2,546,297 7,097,437
Total, Gross Unrealized Losses (43,593) (324,074)
Agency    
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]    
Less than 12 Months, Estimated Fair Value 660,143 3,252,413
Less than 12 Months, Gross Unrealized Losses (1,996) (53,374)
12 Months or Longer, Estimated Fair Value 1,885,254 3,845,019
12 Months or Longer, Gross Unrealized Losses (41,410) (270,700)
Total, Estimated Fair Value 2,545,397 7,097,432
Total, Gross Unrealized Losses (43,406) (324,074)
Non-Agency    
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]    
Less than 12 Months, Estimated Fair Value 560 5
Less than 12 Months, Gross Unrealized Losses (88) 0
12 Months or Longer, Estimated Fair Value 340 0
12 Months or Longer, Gross Unrealized Losses (99) 0
Total, Estimated Fair Value 900 5
Total, Gross Unrealized Losses $ (187) $ 0