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Commitments and Contingencies - Additional Information (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Commitments And Contingencies Disclosure [Line Items] |  |  |
Environmental remediation liabilities- discounted | $ 39,200 | $ 35,600 |
Accrual for environmental loss contingencies- weighted-average discount rate | 3.50% | 3.70% |
Environmental remediation liabilities- undiscounted | $ 73,600 | $ 69,200 |
Additions and changes in estimates | 15,750 | 14,734 |
Asset retirement obligation charges |  | 3,600 |
Legal accrual |  |  | $ 27,027
Tax indemnification liability | 30,488 | 30,993 |
Minimum |  |  |
Commitments And Contingencies Disclosure [Line Items] |  |  |
Potential revision on future environmental remediation costs before tax | 10,000 |  |
Maximum |  |  |
Commitments And Contingencies Disclosure [Line Items] |  |  |
Potential revision on future environmental remediation costs before tax | 30,000 |  |
Other expenses, net |  |  |
Commitments And Contingencies Disclosure [Line Items] |  |  |
Asset retirement obligation charges |  | 3,600 |
2014 Sales Contract | Other expenses, net |  |  |
Commitments And Contingencies Disclosure [Line Items] |  |  |
Legal accrual | 16,200 |  |
Guarantee From Previously Disposed Business | Other expenses, net |  |  |
Commitments And Contingencies Disclosure [Line Items] |  |  |
Legal accrual | 10,800 |  |
Foreign |  |  |
Commitments And Contingencies Disclosure [Line Items] |  |  |
Additions and changes in estimates | $ 15,800 | $ 11,100 |

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