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Borrowed Funds (Contractual Maturities of All Long Term Borrowings) (Details) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Debt Instrument [Line Items]    
Due in 2018 $ 0 $ 20,000
Due in 2019 20,000 20,000
Due in 2020 30,000 30,000
Due in 2021 20,000 20,000
Thereafter 30,929 30,929
Total long-term debt 100,929 $ 120,929
Fixed Rate [Member]    
Debt Instrument [Line Items]    
Due in 2018 0  
Due in 2019 20,000  
Due in 2020 30,000  
Due in 2021 20,000  
Thereafter 0  
Total long-term debt 70,000  
Floating Rate [Member]    
Debt Instrument [Line Items]    
Due in 2018 0  
Due in 2019 0  
Due in 2020 0  
Due in 2021 0  
Thereafter 30,929  
Total long-term debt $ 30,929