Acquisitions and Dispositions - Schedule of Income (Loss) from Discontinued Operations Harsco Rail (Details) - Discontinued Operations, Held-for-sale - Harsco Rail - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income (loss) from discontinued businesses	$ (19,967)	$ 23,096	$ 25,406
Selling, general and administrative expenses	178	0	0
Services
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Total revenues	32,425	31,642	30,254
Cost of products sold	17,272	23,480	21,883
Product
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Total revenues	266,221	298,189	269,119
Cost of products sold	$ 251,897	$ 235,040	$ 192,310