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Securities (Details 2) - USD ($) $ in Thousands | 9 Months Ended
--- | ---
Sep. 30, 2017 | Sep. 30, 2016
Realized Gain Loss [Line Items] |  |
Proceeds | $ 48,063 | $ 26,977
Gross gains | 848 | 718
Gross losses | $ (90) | $ (18)

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