v3.25.2
Investments - AFS Securities - Major Security Types (Details) - USD ($)
$ in Thousands
Jun. 30, 2025
Dec. 31, 2024
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost - AFS [1] $ 14,635,395 $ 14,338,221
Gross Unrealized Gains 19,876 41,644
Gross Unrealized Losses (47,601) (29,976)
Estimated Fair Value 14,607,670 14,349,889
Unamortized premium (discount) (201,004) (222,607)
Applicable fair value hedging-basis adjustment (492,322) (910,114)
Accrued interest receivable $ 56,850 $ 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 $ 5,869,497 $ 5,691,550
Gross Unrealized Gains 1,452 5,827
Gross Unrealized Losses (4,302) (2,172)
Estimated Fair Value 5,866,647 5,695,205
GSE and TVA debentures    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost - AFS 1,499,661 1,568,805
Gross Unrealized Gains 9,433 13,976
Gross Unrealized Losses (122) (135)
Estimated Fair Value 1,508,972 1,582,646
GSE multifamily MBS | Multifamily    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost - AFS 7,266,237 7,077,866
Gross Unrealized Gains 8,991 21,841
Gross Unrealized Losses (43,177) (27,669)
Estimated Fair Value $ 7,232,051 $ 7,072,038
[1] At June 30, 2025 and December 31, 2024, includes net unamortized discounts of $(201,004) and $(222,607), respectively, and fair-value hedging basis adjustments of $(492,322) and $(910,114), respectively. Excludes accrued interest receivable at June 30, 2025 and December 31, 2024 of $56,850 and $58,333, respectively.