Property, Plant and Equipment (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Property, Plant and Equipment [Line Items]
Total depreciation expense	$ 122,800	$ 119,400	$ 370,700	$ 339,200
Property, Plant and Equipment, Gross	5,694,145		5,694,145		$ 5,369,418
Land [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	207,985		207,985		207,985
Land [Member] | K5 Factory [Member] | KOREA, REPUBLIC OF
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	104,100		104,100		104,100
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	236,539		236,539		39,261
Construction in Progress [Member] | K5 Factory [Member] | KOREA, REPUBLIC OF
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	205,800		205,800		29,800
Accumulated Capitalized Interest Costs	$ 15,400		$ 15,400		$ 8,600