v3.26.1
Commitments and Contingencies (Details) - USD ($)
$ in Thousands
Mar. 31, 2026
Dec. 31, 2025
Commitments and Contingencies [Line Items]    
Derivative, Collateral, Right to Reclaim Cash $ 256,981 $ 335,802
Derivative, Collateral, Right to Reclaim Securities 347,962 475,374
Other FHLBanks [Member]    
Commitments and Contingencies [Line Items]    
Debt, Gross 1,116,000,000  
Loan Origination Commitments [Member]    
Commitments and Contingencies [Line Items]    
Fair Value Disclosure, Off-balance Sheet Risks, Face Amount, Liability 37,507 2,336
Standby Letters of Credit [Member]    
Commitments and Contingencies [Line Items]    
Fair Value Disclosure, Off-balance Sheet Risks, Face Amount, Liability 30,853,503 33,099,489
Financial Standby Letter of Credit [Member]    
Commitments and Contingencies [Line Items]    
Fair Value Disclosure, Off-balance Sheet Risks, Face Amount, Expiring in 2027 127,801  
Fair Value Disclosure, Off-balance Sheet Risks, Face Amount, Expiring in 2028 139,107  
Fair Value Disclosure, Off-balance Sheet Risks, Face Amount, Expiring in 2029 329,303  
Fair Value Disclosure, Off-balance Sheet Risks, Face Amount, Expiring in 2030 253,088  
Fair Value Disclosure, Off-balance Sheet Risks, Face Amount, Liability 929,869 929,869
Fair Value Disclosure, Off-balance Sheet Risks, Face Amount, Expiring in 2031 80,570  
Consolidated Obligation Bonds [Member]    
Commitments and Contingencies [Line Items]    
Fair Value Disclosure, Off-balance Sheet Risks, Face Amount, Liability 125,000 530,000
Consolidated Obligation Discount Notes [Member]    
Commitments and Contingencies [Line Items]    
Fair Value Disclosure, Off-balance Sheet Risks, Face Amount, Liability 1,362,620 1,008,320
Conventional Mortgage Loan [Member]    
Commitments and Contingencies [Line Items]    
Fair Value Disclosure, Off-balance Sheet Risks, Face Amount, Liability $ 42,890 $ 25,952