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Investment Securities (Gains and Losses Resulting from Investment Sales, Redemptions or Calls) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Investment Securities [Abstract]    
Gross realized gains-AFS $ 90 $ 474
Gross realized gains-HTM   415
Gross realized losses-AFS (12) (31)
Net realized gain $ 78 $ 858