Property, Plant, and Equipment - Summary (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	$ 2,754,323	$ 2,740,997	$ 2,700,255
Less: accumulated depreciation	(1,997,639)	(1,955,712)	(1,916,786)
Property, plant, and equipment, net	756,684	785,285	783,469
Land
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	25,197	25,114	25,186
Buildings
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	298,780	303,495	285,051
Machinery and equipment
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	896,388	902,861	850,723
Software
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	387,551	384,568	364,495
Tools, dies, and molds
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	877,181	887,442	880,171
Capital leases
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	23,927	24,279	23,970
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	$ 245,299	$ 213,238	$ 270,659

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

+ References

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