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Commitments and Contingencies (Tables)
 12 Months Ended
Dec. 31, 2019
Commitments and Contingencies Disclosure [Abstract]  
Schedule of Contractual Purchase Commitments
To safeguard the supply of raw materials, contractual purchase commitments under long-term supply agreements for raw materials, primarily oil and gas, are in place with the following maturities:
MaturityDecember 31, 2019
(In thousands)
2020$137,190  
2021 to 2024204,997  
2025 and thereafter—  
Total$342,188