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Borrowed Funds (Pledged financial instruments) (Details) - USD ($)
$ in Thousands
Sep. 30, 2021
Dec. 31, 2020
Debt Disclosure [Abstract]    
Pledged to secure borrowed funds $ 308,633 $ 302,041
Pledged to secure repurchase agreements 67,542 68,773
Pledged for public deposits and for other purposes necessary or required by law 28,794 39,641
Total 404,969 410,455
Short-term Debt [Line Items]    
AFS securities pledged without single maturity dates 67,542 68,773
State and Local Funds Purchased [Member]    
Short-term Debt [Line Items]    
AFS securities pledged without single maturity dates 13,904 12,728
Mortgage Backed Securities, Other [Member]    
Short-term Debt [Line Items]    
AFS securities pledged without single maturity dates 17,141 30,250
Collateralized Mortgage Obligations [Member]    
Short-term Debt [Line Items]    
AFS securities pledged without single maturity dates 16,715 25,795
US Treasury Securities    
Short-term Debt [Line Items]    
AFS securities pledged without single maturity dates $ 19,782 $ 0