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Fair Value Measurements (Details) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Assets and liabilities subject to fair value measurements |  |
Commodity futures - financial assets | $ 4,271 | $ 5,597
Commodity futures - financial liabilities | 7,388 | 13,601
Carrying amount | 3,070,575 | 3,105,876
Level 2 |  |
Assets and liabilities subject to fair value measurements |  |
Fair value of long-term debt, including current maturities | 2,700,000 | 3,300,000
Recurring |  |
Assets and liabilities subject to fair value measurements |  |
Short-term investments | 628,215 |
Recurring | Level 2 |  |
Assets and liabilities subject to fair value measurements |  |
Short-term investments | 628,215 |
Futures | Recurring | Commodity contract |  |
Assets and liabilities subject to fair value measurements |  |
Commodity futures - financial assets | 4,271 | 5,597
Commodity futures - financial liabilities | 7,388 | 13,601
Futures | Recurring | Level 2 | Commodity contract |  |
Assets and liabilities subject to fair value measurements |  |
Commodity futures - financial assets | 4,271 | 5,597
Commodity futures - financial liabilities | $ 7,388 | $ 13,601

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