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Revenue Recognition - Revenues by Primary Geographical Markets (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | $ 447,281 | $ 350,898 | $ 846,122 | $ 680,800
Waste Processing and Reuse Solutions [Domain] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 161,579 | 0 | 240,391 | 0
Environmental services related to resource recovery for metals manufacturing and related logistical services |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 174,173 | 230,395 | 381,519 | 454,456
Applied Products [Domain] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 26,591 | 33,686 | 56,853 | 64,076
Aluminum Dross and Scrap Processing Systems [Domain] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 3,227 | 5,257 | 7,178 | 12,118
Railway Track Maintenance Equipment [Domain] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 40,411 | 38,960 | 83,026 | 72,568
After-market Parts and Services; Safety and Diagnostic Technology [Domain] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 32,500 | 36,700 | 63,700 | 68,001
Railway Contracting Services [Domain] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 8,800 | 5,900 | 13,455 | 9,581
North America |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 275,396 | 143,390 | 477,862 | 267,104
Western Europe |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 99,827 | 109,016 | 214,308 | 217,250
Latin America |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 25,623 | 37,045 | 59,548 | 74,627
Asia-Pacific |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 27,774 | 40,750 | 55,638 | 82,509
Middle East and Africa |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 14,793 | 15,742 | 30,682 | 29,657
Eastern Europe |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 3,868 | 4,955 | 8,084 | 9,653
Operating Segments | Harsco Environmental Segment |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 203,991 | 269,338 | 445,550 | 530,650
Operating Segments | Harsco Environmental Segment | Waste Processing and Reuse Solutions [Domain] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 0 | 0 | 0 | 0
Operating Segments | Harsco Environmental Segment | Environmental services related to resource recovery for metals manufacturing and related logistical services |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 174,173 | 230,395 | 381,519 | 454,456
Operating Segments | Harsco Environmental Segment | Applied Products [Domain] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 26,591 | 33,686 | 56,853 | 64,076
Operating Segments | Harsco Environmental Segment | Aluminum Dross and Scrap Processing Systems [Domain] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 3,227 | 5,257 | 7,178 | 12,118
Operating Segments | Harsco Environmental Segment | Railway Track Maintenance Equipment [Domain] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 0 | 0 | 0 | 0
Operating Segments | Harsco Environmental Segment | After-market Parts and Services; Safety and Diagnostic Technology [Domain] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 0 | 0 | 0 | 0
Operating Segments | Harsco Environmental Segment | Railway Contracting Services [Domain] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 0 | 0 | 0 | 0
Operating Segments | Harsco Environmental Segment | North America |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 57,356 | 78,112 | 127,237 | 151,461
Operating Segments | Harsco Environmental Segment | Western Europe |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 82,972 | 98,478 | 179,289 | 196,699
Operating Segments | Harsco Environmental Segment | Latin America |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 25,108 | 36,272 | 58,368 | 73,263
Operating Segments | Harsco Environmental Segment | Asia-Pacific |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 19,894 | 35,779 | 41,890 | 69,917
Operating Segments | Harsco Environmental Segment | Middle East and Africa |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 14,793 | 15,742 | 30,682 | 29,657
Operating Segments | Harsco Environmental Segment | Eastern Europe |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 3,868 | 4,955 | 8,084 | 9,653
Operating Segments | Harsco Clean Earth Segment |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 161,579 | 0 | 240,391 | 0
Operating Segments | Harsco Clean Earth Segment | Waste Processing and Reuse Solutions [Domain] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 161,579 | 0 | 240,391 | 0
Operating Segments | Harsco Clean Earth Segment | Environmental services related to resource recovery for metals manufacturing and related logistical services |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 0 | 0 | 0 | 0
Operating Segments | Harsco Clean Earth Segment | Applied Products [Domain] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 0 | 0 | 0 | 0
Operating Segments | Harsco Clean Earth Segment | Aluminum Dross and Scrap Processing Systems [Domain] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 0 | 0 | 0 | 0
Operating Segments | Harsco Clean Earth Segment | Railway Track Maintenance Equipment [Domain] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 0 | 0 | 0 | 0
Operating Segments | Harsco Clean Earth Segment | After-market Parts and Services; Safety and Diagnostic Technology [Domain] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 0 | 0 | 0 | 0
Operating Segments | Harsco Clean Earth Segment | Railway Contracting Services [Domain] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 0 | 0 | 0 | 0
Operating Segments | Harsco Clean Earth Segment | North America |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 161,579 | 0 | 240,391 | 0
Operating Segments | Harsco Clean Earth Segment | Western Europe |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 0 | 0 | 0 | 0
Operating Segments | Harsco Clean Earth Segment | Latin America |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 0 | 0 | 0 | 0
Operating Segments | Harsco Clean Earth Segment | Asia-Pacific |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 0 | 0 | 0 | 0
Operating Segments | Harsco Clean Earth Segment | Middle East and Africa |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 0 | 0 | 0 | 0
Operating Segments | Harsco Clean Earth Segment | Eastern Europe |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 0 | 0 | 0 | 0
Operating Segments | Harsco Rail Segment |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 81,711 | 81,560 | 160,181 | 150,150
Operating Segments | Harsco Rail Segment | Waste Processing and Reuse Solutions [Domain] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 0 | 0 | 0 | 0
Operating Segments | Harsco Rail Segment | Environmental services related to resource recovery for metals manufacturing and related logistical services |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 0 | 0 | 0 | 0
Operating Segments | Harsco Rail Segment | Applied Products [Domain] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 0 | 0 | 0 |
Operating Segments | Harsco Rail Segment | Aluminum Dross and Scrap Processing Systems [Domain] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 0 | 0 | 0 | 0
Operating Segments | Harsco Rail Segment | Railway Track Maintenance Equipment [Domain] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 40,411 | 38,960 | 83,026 | 72,568
Operating Segments | Harsco Rail Segment | After-market Parts and Services; Safety and Diagnostic Technology [Domain] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 32,500 | 36,700 | 63,700 | 68,001
Operating Segments | Harsco Rail Segment | Railway Contracting Services [Domain] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 8,800 | 5,900 | 13,455 | 9,581
Operating Segments | Harsco Rail Segment | North America |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 56,461 | 65,278 | 110,234 | 115,643
Operating Segments | Harsco Rail Segment | Western Europe |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 16,855 | 10,538 | 35,019 | 20,551
Operating Segments | Harsco Rail Segment | Latin America |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 515 | 773 | 1,180 | 1,364
Operating Segments | Harsco Rail Segment | Asia-Pacific |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 7,880 | 4,971 | 13,748 | 12,592
Operating Segments | Harsco Rail Segment | Middle East and Africa |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 0 | 0 | 0 | 0
Operating Segments | Harsco Rail Segment | Eastern Europe |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | $ 0 | $ 0 | $ 0 | $ 0

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