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Subsequent Events	12 Months Ended
Subsequent Events	Dec. 31, 2017
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events On February 8, 2018, we acquired a company for a purchase price of $75.8 million, plus we assumed debt of $18.4 million. The acquisition includes a potential earn-out for which we have not yet estimated a fair value. This acquisition was funded with cash on hand. We are in the preliminary phase of the purchase accounting process, including obtaining third party valuations of certain tangible and intangible assets acquired. As such, the purchase accounting process is incomplete and we cannot provide the required disclosures of the estimated fair value of the assets and liabilities acquired for this business combination.