Goodwill and Other Intangibles - Narrative (Details)	3 Months Ended
Mar. 31, 2018 USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill impairment	$ 0

Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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