Property, Plant and Equipment (Details) (USD $) In Thousands, unless otherwise specified								12 Months Ended				12 Months Ended				12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2012 Land	Dec. 31, 2011 Land	Dec. 31, 2012 Land improvements	Dec. 31, 2011 Land improvements	Dec. 31, 2012 Land improvements Minimum	Dec. 31, 2012 Land improvements Maximum	Dec. 31, 2012 Buildings and improvements	Dec. 31, 2011 Buildings and improvements	Dec. 31, 2012 Buildings and improvements Minimum	Dec. 31, 2012 Buildings and improvements Maximum	Dec. 31, 2012 Machinery and equipment	Dec. 31, 2011 Machinery and equipment	Dec. 31, 2012 Machinery and equipment Minimum	Dec. 31, 2012 Machinery and equipment Maximum	Dec. 31, 2012 Uncompleted construction	Dec. 31, 2011 Uncompleted construction
Property, Plant and Equipment [Line Items]
Gross property, plant and equipment	$ 3,288,630	$ 3,275,728		$ 26,336	$ 26,729	$ 14,199	$ 17,960			$ 190,078	$ 186,799			$ 2,950,384	$ 2,977,521			$ 107,633	$ 66,719
Less: Accumulated depreciation	(2,022,405)	(2,001,244)
Property, plant and equipment, net	$ 1,266,225	$ 1,274,484	$ 1,366,973
Estimated Useful Lives								5 years	20 years			5 years	40 years			3 years	20 years