Acquisitions and Dispositions - Assets and Liabilities Held For Sale (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Business Acquisition [Line Items]
Disposal Group, Including Discontinued Operation, Liabilities	$ 11,344	$ 39,410
Discontinued Operations, Held-for-sale [Member] | Harsco Industrial
Business Acquisition [Line Items]
Disposal Group, Including Discontinued Operation, Accounts, Notes and Loans Receivable, Net	10,982	44,786
Disposal Group, Including Discontinued Operation, Other Receivables, Current	78	412
Disposal Group, Including Discontinued Operation, Inventory, Current	9,838	16,926
Disposal Group, Including Discontinued Operation, Contract With Customer, Asset, Net, Current	0	12,124
Disposal Group, Including Discontinued Operation, Other Assets, Current	655	984
Disposal Group, Including Discontinued Operation, Property, Plant and Equipment, Noncurrent	20,703	37,107
Disposal Group, Including Discontinued Operation, Right-Of-Use Assets, Noncurrent	11,230	0
Disposal Group, Including Discontinued Operation, Goodwill, Noncurrent	0	6,839
Disposal Group, Including Discontinued Operation, Intangible Assets, Noncurrent	0	10,618
Disposal Group, Including Discontinued Operation, Deferred Tax Assets	0	563
Disposal Group, Including Discontinued Operation, Other Assets, Noncurrent	96	204
Disposal Group, Including Discontinued Operation, Assets	53,582	130,563
Disposal Group, Including Discontinued Operation, Accounts Payable, Current	5,060	24,426
Disposal Group, Including Discontinued Operation, Accrued Liabilities, Current	2,324	7,385
Disposal Group, Including Discontinued Operation, Deferred Revenue, Current	1,168	1,910
Disposal Group, Including Discontinued Operation, Operating Lease, Liability, Current	1,575	0
Disposal Group, Including Discontinued Operation, Other Liabilities, Current	1,218	5,689
Disposal Group, Including Discontinued Operation, Operating Lease, Liability, Noncurrent	9,837	0
Disposal Group, Including Discontinued Operation, Other Liabilities, Noncurrent	2,314	555
Disposal Group, Including Discontinued Operation, Liabilities	$ 23,496	$ 39,965