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Commitments and Contingencies - Additional Information (Details) - USD ($)
$ in Thousands
 12 Months Ended
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