Annual report [Section 13 and 15(d), not S-K Item 405]

Note 9 - Federal Funds Purchased (Details Textual)

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Note 9 - Federal Funds Purchased (Details Textual) - USD ($)
$ in Millions
Dec. 31, 2025
Dec. 31, 2024
Federal Funds Purchased, Portion from Customers of Correspondent Banks $ 1,370 $ 1,910
Short-term Borrowings from Various Financial Institutions [Member]    
Line of Credit Facility, Maximum Borrowing Capacity 472 537
Long-Term Line of Credit $ 100 $ 80
Federal Funds Purchased [Member] | Minimum [Member]    
Debt Instrument, Interest Rate, Stated Percentage 3.67% 4.42%
Federal Funds Purchased [Member] | Maximum [Member]    
Debt Instrument, Interest Rate, Stated Percentage 3.75% 4.50%