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 Millions
Dec. 31, 2019
Dec. 31, 2018
Federal Funds Purchased, Portion from Customers of Correspondent Banks $ 385.7 $ 288.7
Short-term Borrowings from Various Financial Institutions [Member]    
Line of Credit Facility, Maximum Borrowing Capacity 767.0 $ 562.0
Long-term Line of Credit, Total $ 85.0  
Debt Instrument, Interest Rate, Effective Percentage 1.61%  
Federal Funds Purchased [Member] | Minimum [Member]    
Debt Instrument, Interest Rate, Stated Percentage 1.60% 2.50%
Federal Funds Purchased [Member] | Maximum [Member]    
Debt Instrument, Interest Rate, Stated Percentage 1.67% 2.65%