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Short-Term Borrowings (Federal Home Loan Bank Advances) (Details) - USD ($)
Jun. 30, 2017
Dec. 31, 2016
Short-term Debt [Line Items]    
Federal Home Loan Bank Advances $ 35,000,000 $ 20,000,000
Due December, 2017, Daily Rate 0.80%    
Short-term Debt [Line Items]    
Federal Home Loan Bank Advances   $ 20,000,000
Interest rate 0.80%  
Due December, 2017, Daily Rate 1.32%    
Short-term Debt [Line Items]    
Federal Home Loan Bank Advances $ 11,000,000  
Interest rate 1.32%  
Due July, 2017, Fixed Rate 1.17%    
Short-term Debt [Line Items]    
Federal Home Loan Bank Advances $ 24,000,000  
Interest rate 1.17%