Property, Plant and Equipment (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Property, Plant and Equipment
Property, plant and equipment, gross	$ 1,700,523	$ 1,723,784
Less: accumulated depreciation	(552,644)	(537,014)
Property, plant and equipment, net	1,147,879	1,186,770
Land
Property, Plant and Equipment
Property, plant and equipment, gross	176,502	183,117
Buildings
Property, Plant and Equipment
Property, plant and equipment, gross	220,898	221,449
Machinery and equipment
Property, Plant and Equipment
Property, plant and equipment, gross	1,226,748	1,236,531
Construction in progress
Property, Plant and Equipment
Property, plant and equipment, gross	$ 76,375	$ 82,687

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.

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