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Fair Value Measurements (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Assets and liabilities subject to fair value measurements
Carrying amount	$ 3,100,000	$ 3,100,000
Level 2
Assets and liabilities subject to fair value measurements
Fair value of long-term debt, including current maturities	2,800,000	2,800,000
Recurring
Assets and liabilities subject to fair value measurements
Short-term investments	653,255	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	653,255	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	3,576	2,483
Commodity futures - financial liabilities	5,989	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	3,576	2,483
Commodity futures - financial liabilities	5,989	9,305
Futures \| Recurring \| Level 3 \| Commodity contract
Assets and liabilities subject to fair value measurements
Commodity futures - financial assets
Commodity futures - financial liabilities