Property, Plant and Equipment (Details) (USD $) In Thousands, unless otherwise specified						12 Months Ended		12 Months Ended		12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2011 Land	Dec. 31, 2010 Land	Dec. 31, 2011 Land improvements Y	Dec. 31, 2010 Land improvements	Dec. 31, 2011 Buildings and improvements Y	Dec. 31, 2010 Buildings and improvements	Dec. 31, 2011 Machinery and equipment Y	Dec. 31, 2010 Machinery and equipment	Dec. 31, 2011 Uncompleted construction	Dec. 31, 2010 Uncompleted construction
Property, Plant and Equipment
Gross property, plant and equipment	$ 3,275,728	$ 3,364,582		$ 26,729	$ 29,456	$ 17,960	$ 18,141	$ 186,799	$ 196,777	$ 2,977,521	$ 3,045,335	$ 66,719	$ 74,873
Less accumulated depreciation	(2,001,244)	(1,997,609)
Net property, plant and equipment	$ 1,274,484	$ 1,366,973	$ 1,510,801
Estimated Useful Lives, low end of range (in years)						5		5		3
Estimated Useful Lives, high end of range (in years)						20		40		20