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Fair Value Measurements (Details) - USD ($) $ in Thousands | Sep. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Assets and liabilities subject to fair value measurements |  |
Carrying amount | $ 3,700,000 | $ 3,100,000
Level 2 |  |
Assets and liabilities subject to fair value measurements |  |
Fair value of long-term debt, including current maturities | 3,500,000 | 2,800,000
Recurring |  |
Assets and liabilities subject to fair value measurements |  |
Short-term investments | 645,343 | 721,210
Recurring | Level 1 |  |
Assets and liabilities subject to fair value measurements |  |
Short-term investments |  |
Recurring | Level 2 |  |
Assets and liabilities subject to fair value measurements |  |
Short-term investments | 645,343 | 721,210
Recurring | Level 3 |  |
Assets and liabilities subject to fair value measurements |  |
Short-term investments |  |
Futures | Recurring | Commodity contract |  |
Assets and liabilities subject to fair value measurements |  |
Commodity futures - financial assets | 11,149 | 2,483
Commodity futures - financial liabilities | 27,056 | 9,305
Futures | Recurring | Level 1 | Commodity contract |  |
Assets and liabilities subject to fair value measurements |  |
Commodity futures - financial assets |  |
Commodity futures - financial liabilities |  |
Futures | Recurring | Level 2 | Commodity contract |  |
Assets and liabilities subject to fair value measurements |  |
Commodity futures - financial assets | 11,149 | 2,483
Commodity futures - financial liabilities | 27,056 | 9,305
Futures | Recurring | Level 3 | Commodity contract |  |
Assets and liabilities subject to fair value measurements |  |
Commodity futures - financial assets |  |
Commodity futures - financial liabilities |  |

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