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Borrowed Funds (Short-term borrowings) (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Securities Sold under Agreements to Repurchase [Member]        
Short-term Debt [Line Items]        
Maximum Month End Balance $ 33,349 $ 32,386 $ 33,349 $ 37,441
Average Balance $ 30,578 $ 32,520 $ 30,845 $ 31,350
Weighted Average Interest Rate During the Period 0.10% 0.09% 0.10% 0.10%
Federal Funds Purchased [Member]        
Short-term Debt [Line Items]        
Maximum Month End Balance $ 0 $ 0 $ 0 $ 7,070
Average Balance $ 5 $ 317 $ 2 $ 919
Weighted Average Interest Rate During the Period 0.49% 2.61% 0.49% 2.64%