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Mortgage Loans Held for Portfolio MPF -Allowance Roll Forward Table (Details) - Mortgage loans held for portfolio, net - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Financing Receivable, Allowance for Credit Loss [Line Items]        
MPF - Allowance for Credit Loss - Beginning Balance     $ 2,429  
MPF -Allowance for Credit Loss - Ending Balance $ 2,232   2,232  
Conventional MPF Loan [Member]        
Financing Receivable, Allowance for Credit Loss [Line Items]        
MPF - Allowance for Credit Loss - Beginning Balance 2,191 $ 2,694 2,429 $ 3,018
(Charge-offs) Recoveries, net [1] 91 342 331 698
Provision( reversal) for credit losses (132) (42) (134) (74)
MPF -Allowance for Credit Loss - Ending Balance $ 2,232 $ 2,394 $ 2,232 $ 2,394
[1] Net charge-offs that the Bank does not expect to recover through CE receivable.