Property, Plant and Equipment (Details Textual) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Property, Plant and Equipment [Abstract]
Depreciation	$ 46.2	$ 45.9	$ 54.0
Capitalized interest costs	$ 0.8	$ 1.0