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Fair Value Measurements (Details) - USD ($) $ in Thousands | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Assets and liabilities subject to fair value measurements |  |
Carrying amount | $ 3,231,007 | $ 3,071,056
Level 2 |  |
Assets and liabilities subject to fair value measurements |  |
Fair value of long-term debt, including current maturities | 3,000,000 | 2,800,000
Recurring |  |
Assets and liabilities subject to fair value measurements |  |
Short-term investments | 147,811 | 721,210
Recurring | Level 2 |  |
Assets and liabilities subject to fair value measurements |  |
Short-term investments | 147,811 | 721,210
Futures | Recurring | Commodity contract |  |
Assets and liabilities subject to fair value measurements |  |
Commodity futures - financial assets | 19,323 | 2,483
Commodity futures - financial liabilities | 6,272 | 9,305
Futures | Recurring | Level 2 | Commodity contract |  |
Assets and liabilities subject to fair value measurements |  |
Commodity futures - financial assets | 19,323 | 2,483
Commodity futures - financial liabilities | $ 6,272 | $ 9,305

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