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v3.19.3.a.u2

Information by Segment and Geographic Area (Details) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 USD ($) segment Customer | Dec. 31, 2018 USD ($) Customer | Dec. 31, 2017 USD ($) Customer
Revenue, Major Customer [Line Items] |  |  |
Revenues | $ | $ 1,503,742 | $ 1,347,672 | $ 1,307,470
Number of reportable segments | segment | 3 |  |
Number of major customers | 1 | 1,000 | 1,000
Harsco Environmental |  |  |
Revenue, Major Customer [Line Items] |  |  |
Number of major customers | 1 |  |
Harsco Environmental |  |  |
Revenue, Major Customer [Line Items] |  |  |
Number of major customers |  | 1 | 1
Clean Earth |  |  |
Revenue, Major Customer [Line Items] |  |  |
Number of major customers | 0 |  |
Harsco Rail |  |  |
Revenue, Major Customer [Line Items] |  |  |
Number of major customers | 1 | 1 | 1
All Other |  |  |
Revenue, Major Customer [Line Items] |  |  |
Revenues | $ | $ 718,663 | $ 745,943 | $ 736,958
U.S. Plans |  |  |
Revenue, Major Customer [Line Items] |  |  |
Revenues | $ | 640,390 | 458,383 | 423,888
United Kingdom |  |  |
Revenue, Major Customer [Line Items] |  |  |
Revenues | $ | $ 144,689 | $ 143,346 | $ 146,624

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