Additional Balance Sheet and Cash Flow Information (Property, Plant And Equipment, At Cost) (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 3,261,525	$ 3,173,653
Accumulated depreciation	(2,279,932)	(2,231,235)
Total property, plant and equipment, net	981,593	942,418
Land and related improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	65,533	56,554
Buildings and related improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	464,200	453,433
Machinery and equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	1,887,269	1,859,443
Software
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	630,114	524,076
Construction in progress
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 214,409	$ 280,147