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Securities (Schedule of Proceeds from Sales of Securities) (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Schedule of Investments [Line Items]    
Proceeds from Sales $ 7,295 $ 0
Gross Gains on Sales 270 0
Sale of Securities    
Schedule of Investments [Line Items]    
Proceeds from Sales 7,295 0
Gross Gains on Sales 270 0
Income Taxes on Gross Gains $ 57 $ 0