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Basis of Presentation	6 Months Ended
Basis of Presentation	Jun. 30, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Basis of Presentation Harsco Corporation (the "Company") has prepared these unaudited condensed consolidated financial statements based on Securities and Exchange Commission rules that permit reduced disclosure for interim periods. In the opinion of management, all adjustments (all of which are of a normal recurring nature) that are necessary for a fair statement are reflected in the unaudited condensed consolidated financial statements. The December 31, 2016 Condensed Consolidated Balance Sheet information contained in this Quarterly Report on Form 10-Q was derived from the 2016 audited consolidated financial statements, but does not include all disclosures required by accounting principles generally accepted in the U.S. ("U.S. GAAP") for an annual report. The unaudited condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements, including the notes thereto, included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2016. Operating results and cash flows for the three and six months ended June 30, 2017 are not indicative of the results that may be expected for the year ending December 31, 2017. Reclassifications Certain reclassifications have been made to prior year amounts to conform with current year classifications. Restricted Cash The Company had restricted cash of $4.7 million and $2.0 million at June 30, 2017 and December 31, 2016, respectively, and the restrictions are primarily related to collateral provided for certain guarantees of the Company’s performance.