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Investment Securities - Proceeds from sales of securities available-for-sale and associated gains (losses), excluding gains (losses) on called securities (Details 1) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Available-for-sale Securities, Gross Realized Gain (Loss), Disclosures [Abstract]        
Proceeds from Sales $ 25,324 $ 33,487 $ 95,718 $ 110,635
Gross Gains 187 110 847 329
Gross Losses $ (157) $ (276) $ (455) $ (1,335)