Additional Balance Sheet and Cash Flow Information - Property, Plant And Equipment, At Cost (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 3,023,524	$ 3,092,341
Accumulated depreciation	(2,279,740)	(2,244,959)
Total property, plant and equipment, net	743,784	847,382
Land and related improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	69,518	75,798
Buildings and related improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	428,171	507,178
Machinery and equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	1,577,337	1,609,582
Software
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	759,675	750,978
Total property, plant and equipment, net	100,700	138,900
Construction in progress
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 188,823	$ 148,805