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Restructuring Programs (Details) - USD ($)
$ in Thousands
6 Months Ended 12 Months Ended
Jun. 30, 2016
Dec. 31, 2015
Restructuring accrual related activity    
Project Orion Operational Savings - Min   $ 20,000
Project Orion Phase III Operational Savings - Max   25,000
Harsco Metals & Minerals Segment | Harsco Metals & Minerals Improvement Plan (Project Orion) [Member] | Employee Severance [Member]    
Restructuring accrual related activity    
Accrual at December 31 2015 $ 5,807  
Cash Expenditures (3,902)  
Foreign Currency Translation 70  
Other adjustments 160  
Accrual at March 31 2016 $ 2,135 $ 5,807