Basis of Presentation Basis of Presentation-Additional Information (Details) $ in Millions	Jun. 30, 2019 USD ($)	Dec. 31, 2018 USD ($) shares	Jun. 30, 2018 USD ($)
Business Acquisition [Line Items]
Assets Held-for-sale, Property, Plant and Equipment | $	$ 57.2	$ 39.3	$ 17.4
ARX Holding Corp.
Business Acquisition [Line Items]
Business Combination, Step Acquisition, Equity Interest in Acquiree, Including Subsequent Acquisition, Percentage	87.10%	86.80%	86.70%
Number of Shares Put Pursuant to Stockholders' Agreement | shares		204,527