Property, Plant And Equipment (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Property, Plant and Equipment [Abstract]
Capitalized interest included in property, plant and equipment	$ 7,091	$ 9,202	$ 8,167
Depreciation expense	328,486	315,840	$ 276,432
Capital leases included in the property, plant and equipment, cost	8,233	5,477
Capital leases included in the property, plant and equipment, accumulated depreciation	$ 4,431	$ 5,313