Property, Plant and Equipment (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 5,369,418	$ 4,961,306
Less accumulated depreciation and amortization	(3,162,942)	(2,954,753)
Total property, plant and equipment, net	2,206,476	2,006,553
Land
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	207,985	208,048
Land use rights
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	26,845	26,845
Buildings and improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	940,846	911,258
Machinery and equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	3,953,891	3,577,045
Software and computer equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	185,243	193,641
Furniture, fixtures and other equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	15,347	17,430
Construction in progress
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 39,261	$ 27,039