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Fair Values of Financial Instruments (Tables) | 6 Months Ended
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Jun. 30, 2025
Fair Value Disclosures [Abstract] |
Schedule of Estimated Fair Value of Outstanding Debt Balances | The estimated fair value of our outstanding debt balances as of June 30, 2025 and December 31, 2024 is set forth below (in thousands):
| June 30, 2025 |  | December 31, 2024
| Carrying Value |  | Fair Value |  | Carrying Value |  | Fair Value
3.95% Senior Notes Due 2028 | $ | 482,505 |  |  | $ | 467,706 |  |  | $ | 482,505 |  |  | $ | 461,720 |
5.15% Senior Notes Due 2029 | 344,895 |  |  | 340,174 |  |  | 344,895 |  |  | 336,490 |
7.15% Senior Notes Due 2033 | 400,000 |  |  | 411,226 |  |  | 400,000 |  |  | 419,265 |
Equipment Loans Due 2025 | — |  |  | — |  |  | 6,395 |  |  | 6,424 |
Total debt | $ | 1,227,400 |  |  | $ | 1,219,106 |  |  | $ | 1,233,795 |  |  | $ | 1,223,899 |
Schedule of Implied Market Rates of Interest Used to Determine the Fair Value of Outstanding Debt | The implied market rates of interest used to determine the fair value of our outstanding debt balances as of June 30, 2025 and December 31, 2024 are set forth below:
| June 30, 2025 |  | December 31, 2024
3.95% Senior Notes Due 2028 | 5.24 | % |  | 5.49 | %
5.15% Senior Notes Due 2029 | 5.51 | % |  | 5.73 | %
7.15% Senior Notes Due 2033 | 6.70 | % |  | 6.42 | %
Equipment Loans Due 2025 | — | % |  | 5.28 | %

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- Definition Tabular disclosure of input and valuation technique used to measure fair value and change in valuation approach and technique for each separate class of asset and liability measured on recurring and nonrecurring basis. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (bbb)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 103 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482078/820-10-55-103 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (bbb)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 + Details
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- Definition Tabular disclosure of liabilities measured at fair value measured on a recurring or nonrecurring basis. Includes, but is not limited to, fair value measurements recorded and the reasons for the measurements, level within the fair value hierarchy in which the fair value measurements are categorized and transfers between levels 1 and 2. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 + Details
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