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Accumulated Other Comprehensive Income (Loss) (Significant Amounts Reclassified Out Of Each Component Of Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]    
Net realized gains on sales of securities $ 142 $ 6
Income tax expense (574) (550)
NET INCOME 3,129 2,376
Amount Reclassified From Accumulated Other Comprehensive Income (Loss) [Member]    
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]    
Income tax expense [1] (30) (2)
NET INCOME [1] 112 4
Amount Reclassified From Accumulated Other Comprehensive Income (Loss) [Member] | Unrealized gains (losses) on available for sale securities [Member]    
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]    
Net realized gains on sales of securities [1] $ 142 $ 6
[1] Amounts in parentheses indicate debits to net income