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Short-term Borrowings (Schedule of Short-term Borrowings) (Details) - USD ($)
Dec. 31, 2015
Dec. 31, 2014
Short-term Debt [Line Items]    
Short term borrowings $ 31,596,000 $ 578,000
Current borrowing avaliable 342,362,000  
Federal Funds Purchased [Member]    
Short-term Debt [Line Items]    
Short term borrowings $ 31,596,000 $ 578,000
Short-term debt, weighted average interest rate 0.40% 0.24%
Correspondent Banks [Member]    
Short-term Debt [Line Items]    
Line of Credit Facility, Remaining Borrowing Capacity $ 15,000,000