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Loans (Categories of Loans) (Details) - USD ($)
Mar. 31, 2016
Dec. 31, 2015
Mar. 31, 2015
Dec. 31, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Loans $ 1,091,608,000 $ 1,083,395,000    
Undisbursed loans in process (9,644,000) (7,432,000)    
Unamortized deferred loan costs, net 4,927,000 4,882,000    
Allowance for loan losses (12,670,000) (12,641,000) $ (13,217,000) $ (13,168,000)
Net loans 1,074,221,000 1,068,204,000    
Commercial Real Estate [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Loans 248,893,000 236,895,000    
Construction Loans [Member] | Commercial Segment [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Loans 18,039,000 15,744,000    
First Mortgage [Member] | Consumer [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Loans 487,389,000 491,451,000    
Second Mortgage [Member] | Consumer [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Loans 70,911,000 70,990,000    
Automobile Loan [Member] | Consumer [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Loans 15,506,000 15,480,000    
Boat/RVs [Member] | Consumer [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Loans 126,810,000 123,621,000    
Other [Member] | Consumer [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Loans 5,785,000 6,171,000    
Commercial and Industrial [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Loans   123,043,000    
Commercial and Industrial [Member] | Commercial Segment [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Loans 118,275,000 123,043,000    
Real estate        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Loans 825,232,000 815,080,000    
Real estate | Commercial Real Estate [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Loans 248,893,000 236,895,000    
Real estate | Construction Loans [Member] | Commercial Segment [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Loans 18,039,000 15,744,000    
Real estate | First Mortgage [Member] | Consumer [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Loans 487,389,000 491,451,000    
Real estate | Second Mortgage [Member] | Consumer [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Loans 70,911,000 70,990,000    
Other        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Loans 266,376,000 268,315,000    
Other | Automobile Loan [Member] | Consumer [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Loans 15,506,000 15,480,000    
Other | Boat/RVs [Member] | Consumer [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Loans 126,810,000 123,621,000    
Other | Other [Member] | Consumer [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Loans 5,785,000 6,171,000    
Other | Commercial and Industrial [Member] | Commercial Segment [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Loans $ 118,275,000 $ 123,043,000