v3.20.2

Property, Plant and Equipment (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Property, Plant, and Equipment
Total property, plant and equipment, gross	$ 1,443,207	$ 1,433,588
Less: Accumulated depreciation	518,621	481,629
Total property, plant and equipment, net	924,586	951,959
Machinery and equipment
Property, Plant, and Equipment
Total property, plant and equipment, gross	1,386,140	1,378,651
Buildings and improvements
Property, Plant, and Equipment
Total property, plant and equipment, gross	17,534	17,221
Automotive equipment
Property, Plant, and Equipment
Total property, plant and equipment, gross	16,637	16,691
Land and improvements
Property, Plant, and Equipment
Total property, plant and equipment, gross	14,058	14,075
Construction in progress
Property, Plant, and Equipment
Total property, plant and equipment, gross	7,047	5,198
Other
Property, Plant, and Equipment
Total property, plant and equipment, gross	$ 1,791	$ 1,752

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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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