Property, Plant and Equipment (Details Textual) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Property, Plant and Equipment [Line Items]
Depreciation	$ 90.5	$ 82.5	$ 60.4
Capitalized interest costs	$ 1.0	$ 1.5	$ 4.3