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Fair Values of Financial Instruments - Schedule of Estimated Fair Value of Outstanding Debt Balances (Details) - USD ($) $ in Thousands | Sep. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Carrying Value |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Total debt | $ 1,227,400 | $ 1,233,795
Fair Value |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Total debt | $ 1,241,842 | 1,223,899
3.95% Senior Notes Due 2028 |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Debt interest rate | 3.95% |
3.95% Senior Notes Due 2028 | Carrying Value |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Total debt | $ 482,505 | 482,505
3.95% Senior Notes Due 2028 | Fair Value |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Total debt | $ 471,770 | 461,720
5.15% Senior Notes Due 2029 |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Debt interest rate | 5.15% |
5.15% Senior Notes Due 2029 | Carrying Value |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Total debt | $ 344,895 | 344,895
5.15% Senior Notes Due 2029 | Fair Value |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Total debt | $ 346,020 | 336,490
7.15% Senior Notes Due 2033 |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Debt interest rate | 7.15% |
7.15% Senior Notes Due 2033 | Carrying Value |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Total debt | $ 400,000 | 400,000
7.15% Senior Notes Due 2033 | Fair Value |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Total debt | 424,052 | 419,265
Equipment Loans Due 2025 | Carrying Value |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Total debt | 0 | 6,395
Equipment Loans Due 2025 | Fair Value |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Total debt | $ 0 | $ 6,424

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