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Goodwill (Additional Disclosures) (Details) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2018 USD ($) | Dec. 31, 2019 USD ($) reporting_unit | Dec. 31, 2018 USD ($) | Dec. 31, 2017 USD ($)
Goodwill and Intangible Assets Disclosure [Abstract] |  |  |  |
Number of reporting units | reporting_unit |  | 0 |  |
Goodwill [Line Items] |  |  |  |
Goodwill impairment recognized |  | $ 0 | $ 37,180,000 | $ 0
Energy Chemical Technologies |  |  |  |
Goodwill [Line Items] |  |  |  |
Goodwill impairment recognized | $ 37,200,000 |  |  |

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