Property, Plant and Equipment - Narrative (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Property, Plant and Equipment
Property, plant and equipment, net	$ 654,765	$ 653,913
CHINA \| Harsco Environmental Segment
Property, Plant and Equipment
Property, plant and equipment, net	$ 20,000

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