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Accrued Liabilities | 12 Months Ended
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Dec. 31, 2023
Accrued Liabilities |
Accrued Liabilities | (9) Accrued Liabilities Accrued liabilities consisted of the following items: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, | ​
(in thousands) |  | 2022 |  | 2023 |
Capital expenditures | ​ | $ | 16,597 | ​ | ​ | 22,195 | ​
Operating expenses | ​ | ​ | 11,118 | ​ | ​ | 12,060 | ​
Interest expense | ​ | ​ | 37,947 | ​ | ​ | 37,565 | ​
Ad valorem taxes | ​ | ​ | 5,661 | ​ | ​ | 6,521 | ​
Other | ​ | ​ | 1,392 | ​ | ​ | 2,289 | ​
Total accrued liabilities | ​ | $ | 72,715 | ​ | ​ | 80,630 | ​
​

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- Definition The entire disclosure for accounts payable and accrued liabilities at the end of the reporting period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(a),20,24) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 + Details
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