Annual report pursuant to Section 13 and 15(d)

Note 9 - Federal Funds Purchased (Details Textual)

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Note 9 - Federal Funds Purchased (Details Textual) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Federal Funds Purchased, Portion from Customers of Correspondent Banks $ 1,710,000 $ 851,500
Short-term Borrowings from Various Financial Institutions [Member]    
Line of Credit Facility, Maximum Borrowing Capacity 986,000 $ 923,000
Long-term Line of Credit, Total $ 0  
Federal Funds Purchased [Member] | Minimum [Member]    
Debt Instrument, Interest Rate, Stated Percentage 0.15% 0.15%
Federal Funds Purchased [Member] | Maximum [Member]    
Debt Instrument, Interest Rate, Stated Percentage 0.25% 0.25%