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Goodwill and Intangible Assets (FY) (Details) - USD ($) $ in Thousands | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Amortized intangible asset: |  |
Core deposit intangible, Gross Carrying Amount | $ 8,589 | $ 2,750
Core deposit intangible, Accumulated Amortization | $ 626 | $ 280

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