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Acquisitions and Dispositions - Pro Forma Information (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018
Business Acquisition [Line Items] |  |
Gain on Sale from discontinued business | $ (569,135) |
Clean Earth |  |
Business Acquisition [Line Items] |  |
Business Acquisition, Pro Forma Revenue | 1,635,900 | $ 1,614,600
Business Acquisition, Pro Forma Net Income (Loss) | 517,600 | $ 116,100
Gain on Sale from discontinued business | $ 453,600 |

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