v3.26.1
Transactions with Related Parties (Transactions with Other FHLBanks) (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Related Party Transaction [Line Items]          
Loans Repaid by Other Federal Home Loan Banks $ 0 $ 0      
Loans from Other Federal Home Loan Banks 0 0 $ 0 $ 0  
Proceeds from FHLBank Borrowings, Financing Activities 0 0      
Loans Repaid to Other Federal Home Loan Banks 0 0      
FHLBank of Chicago [Member]          
Related Party Transaction [Line Items]          
Servicing fee expense 1,063 $ 1,011 2,122 $ 2,007  
Interest-bearing deposits maintained with FHLBank of Chicago $ 5,359   $ 5,359   $ 5,639