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Other (Income) Expenses (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Other Income and Expenses [Abstract]        
Employee termination benefit costs $ 1,194 $ 1,105 $ 6,966 $ 2,508
Metals and Minerals Separation Costs 10 0 3,297 0
Net gains (105) (2,942) (757) (6,732)
Foreign currency gains related to Harsco Rail Segment advances on contracts and other customer advances 0 0 0 (10,940)
Other 148 1,479 864 1,601
Other (income) expenses $ 1,247 $ (358) $ 10,370 $ (13,563)