v3.25.1
Investments - AFS Securities - Major Security Types (Details) - USD ($)
$ in Thousands
Mar. 31, 2025
Dec. 31, 2024
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost - AFS [1] $ 14,497,089 $ 14,338,221
Gross Unrealized Gains 39,676 41,644
Gross Unrealized Losses (27,691) (29,976)
Estimated Fair Value 14,509,074 14,349,889
Unamortized premium (discount) (213,614) (222,607)
Applicable fair value hedging-basis adjustment (643,741) (910,114)
Accrued interest receivable $ 65,760 $ 58,333
Debt Securities, Available-for-Sale, Excluded Accrued Interest from Amortized Cost [true false] true true
Debt Securities, Available-for-Sale, Accrued Interest, after Allowance for Credit Loss, Statement of Financial Position [Extensible Enumeration] Accrued interest receivable Accrued interest receivable
U.S. Treasury obligations    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost - AFS $ 5,798,288 $ 5,691,550
Gross Unrealized Gains 9,613 5,827
Gross Unrealized Losses (230) (2,172)
Estimated Fair Value 5,807,671 5,695,205
GSE and TVA debentures    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost - AFS 1,498,937 1,568,805
Gross Unrealized Gains 11,972 13,976
Gross Unrealized Losses (27) (135)
Estimated Fair Value 1,510,882 1,582,646
GSE multifamily MBS | Multifamily    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost - AFS 7,199,864 7,077,866
Gross Unrealized Gains 18,091 21,841
Gross Unrealized Losses (27,434) (27,669)
Estimated Fair Value $ 7,190,521 $ 7,072,038
[1] At March 31, 2025 and December 31, 2024, includes net unamortized discounts of $(213,614) and $(222,607), respectively, and fair-value hedging basis adjustments of $(643,741) and $(910,114), respectively. Excludes accrued interest receivable at March 31, 2025 and December 31, 2024 of $65,760 and $58,333, respectively.