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Investment Securities Available for Sale (Realized Gain/Loss on Investment)(Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Investments, Debt and Equity Securities [Abstract]      
Proceeds $ 112,259 $ 96,154 $ 127,648
Gross gains 2,571 2,560 2,089
Gross losses $ (165) $ (201) $ (315)