Property, Plant and Equipment - Narrative (Details) - USD ($)	3 Months Ended	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Property Plant and Equipment (Textual) [Abstract]
Depreciation expense		$ 97,700,000	$ 95,500,000	$ 94,600,000
Fixed Asset Write-Off	$ 9,700,000
Percent of Fixed Asset Write off relating to prior periods	91.00%
After Tax Amount of Fixed Asset Write Off	$ 6,100,000
Earnings per share effect of fixed asset write-off	$ 0.07