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Accumulated Other Comprehensive Income (Loss) (Summary Of Changes In Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Beginning balance $ (4,119)    
Net of tax amount 1,886 $ (4,607) $ 26
Ending balance (2,667) (4,119)  
Accumulated Other Comprehensive Income (Loss) [Member]      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Beginning balance [1] (4,119) 488  
Other comprehensive income (loss) before reclassification [1] 2,116 (4,422)  
Amount reclassified from accumulated other comprehensive income (loss) [1] (230) (185)  
Net of tax amount 1,886 [1] (4,607) [1] 26
Reclassification of certain income tax effects from accumulated other comprehensive income [1] (434)    
Ending balance [1] (2,667) (4,119) 488
Unrealized gains (losses) on available for sale securities [Member]      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Beginning balance [1] (4,437) 488  
Other comprehensive income (loss) before reclassification [1] 2,127 (4,740)  
Amount reclassified from accumulated other comprehensive income (loss) [1] (230) (185)  
Net of tax amount [1] 1,897 (4,925)  
Reclassification of certain income tax effects from accumulated other comprehensive income [1] (501)    
Ending balance [1] (3,041) (4,437) $ 488
Unrealized gain (loss) on pension liability [Member]      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Beginning balance [1] 318    
Other comprehensive income (loss) before reclassification [1] (11) 318  
Net of tax amount [1] (11) 318  
Reclassification of certain income tax effects from accumulated other comprehensive income [1] 67    
Ending balance [1] $ 374 $ 318  
[1] All amounts are net of tax. Amounts in parentheses indicate debits.