Property, Plant and Equipment (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 5,580,575	$ 5,369,418
Less accumulated depreciation and amortization	(3,351,553)	(3,162,942)
Total property, plant and equipment, net	2,229,022	2,206,476
Land [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	207,985	207,985
Land use rights [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	26,845	26,845
Buildings and improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	945,429	940,846
Machinery and equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	4,055,998	3,953,891
Software and computer equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	188,605	185,243
Furniture, fixtures and other equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	16,878	15,347
Construction in progress [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 138,835	$ 39,261