Acquisitions Acquisitions - Narrative (Details) $ in Millions	Jun. 16, 2017 USD ($)
Bank of North Carolina [Member]
Business Acquisition [Line Items]
Transaction Costs	$ 7.2

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

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Period Type:	duration