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Investment Securities (Summary Of Sales Of Available For Sale Securities) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Investment Securities [Abstract]      
Proceeds from sales $ 43,593 $ 162 $ 2,545
Gross realized gains 348 $ 162 $ 1,120
Gross realized losses $ (54)