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Acquisitions and Dispositions - Condensed Consolidated Statements of Cash Flows (Details) - Harsco Industrial - Discontinued Operations, Held-for-sale - USD ($) $ in Thousands | 6 Months Ended
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Jun. 30, 2020 | Jun. 30, 2019
Non-cash operating items |  |
Depreciation and amortization | $ 0 | $ 3,301
Cash flows from investing activities |  |
Purchases of property, plant and equipment | $ 106 | $ 5,221

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