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Fair Value Of Financial Instruments (Narrative) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Fair Value Inputs, Assets, Quantitative Information [Line Items]      
Impaired loans $ 15,905 $ 15,141  
Impaired loans, allowance for loan loss 1,077 2,027  
Impairment charges 0 0 $ 0
Consumer And Other Loans [Member]      
Fair Value Inputs, Assets, Quantitative Information [Line Items]      
Impaired loans 34 43  
Impaired loans, allowance for loan loss $ 34 $ 43  
Minimum [Member] | Impaired Loans [Member] | Level 3 [Member]      
Fair Value Inputs, Assets, Quantitative Information [Line Items]      
Discount rate 10.00%    
Maximum [Member] | Impaired Loans [Member] | Level 3 [Member]      
Fair Value Inputs, Assets, Quantitative Information [Line Items]      
Discount rate 50.00%