v3.25.3
Mortgage Loans Held for Portfolio Credit Quality Indicators (Details) - USD ($)
$ in Thousands
Sep. 30, 2025
Dec. 31, 2024
Financing Receivable, Credit Quality Indicator [Line Items]    
Mortgage Loans in Process of Foreclosure, Amount [1] $ 6,588 $ 5,472
Mortgage loans held for portfolio, net    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss [2] 5,190,054 4,818,881
Financing Receivable, 90 Days or More Past Due, Still Accruing 2,247 2,814
Financing Receivable, Excluding Accrued Interest, Nonaccrual 25,644 25,173
Government-guaranteed/insured loans    
Financing Receivable, Credit Quality Indicator [Line Items]    
Mortgage Loans in Process of Foreclosure, Amount [1] 672 301
Government-guaranteed/insured loans | Mortgage loans held for portfolio, net    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, 90 Days or More Past Due, Still Accruing 2,247 2,814
Financing Receivable, Excluding Accrued Interest, Nonaccrual 0 0
Conventional MPF Loan [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, Originated, Current Fiscal Year and Preceeding Four Preceeding Fiscal Years [3] 2,911,856 3,241,437
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss [3] 5,102,471 4,724,665
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year [3] 2,190,615 1,483,228
Mortgage Loans in Process of Foreclosure, Amount [1] 5,916 5,171
Conventional MPF Loan [Member] | Nonperforming Financial Instruments [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, Originated, More than Five Years before Current Fiscal Year 44,573  
Conventional MPF Loan [Member] | Mortgage loans held for portfolio, net    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, 90 Days or More Past Due, Still Accruing 0 0
Financing Receivable, Excluding Accrued Interest, Nonaccrual 25,644 25,173
Financial Asset, 30 to 59 Days Past Due [Member] | Conventional MPF Loan [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, Originated, Current Fiscal Year and Preceeding Four Preceeding Fiscal Years 17,327 19,827
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss 44,538 41,813
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year 27,211 21,986
Financial Asset, 60 to 89 Days Past Due [Member] | Conventional MPF Loan [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, Originated, Current Fiscal Year and Preceeding Four Preceeding Fiscal Years 5,849 6,238
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss 10,210 11,932
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year $ 4,361 $ 5,694
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Mortgage loans held for portfolio, net    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, Percent Past Due [4] 0.50% 0.50%
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Government-guaranteed/insured loans | Mortgage loans held for portfolio, net    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, Percent Past Due [4] 2.60% 3.00%
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Conventional MPF Loan [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, Originated, Current Fiscal Year and Preceeding Four Preceeding Fiscal Years $ 8,330 $ 9,409
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss 21,331 21,560
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year $ 13,001 $ 12,151
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Conventional MPF Loan [Member] | Mortgage loans held for portfolio, net    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, Percent Past Due [4] 0.40% 0.50%
Financial Asset, Past Due | Conventional MPF Loan [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, Originated, Current Fiscal Year and Preceeding Four Preceeding Fiscal Years $ 31,506 $ 35,474
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss 76,079 75,305
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year   39,831
Financial Asset, Not Past Due | Conventional MPF Loan [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, Originated, Current Fiscal Year and Preceeding Four Preceeding Fiscal Years 2,880,350 3,205,963
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss 5,026,392 4,649,360
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year $ 2,146,042 $ 1,443,397
[1] Includes loans where the decision of foreclosure or similar alternative such as pursuit of deed-in-lieu has been reported. Loans in process of foreclosure are included in past due or current loans dependent on their delinquency status.
[2] Amounts exclude accrued interest receivable of $31.8 million at September 30, 2025 and $27.4 million at December 31, 2024
[3] The amortized cost at September 30, 2025 and December 31, 2024 excludes accrued interest receivable.
[4] Loans that are 90 days or more past due or in the process of foreclosure expressed as a percentage of the total loan portfolio class.