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Accrued Liabilities | 6 Months Ended
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Jun. 30, 2025
Payables and Accruals [Abstract] |
Accrued Liabilities | Note 11—Accrued Liabilities Accrued liabilities as of December 31, 2024 and June 30, 2025 consisted of the following (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, | ​ | June 30,
​ |  | 2024 |  | 2025
Accrued alternative fuels incentives(1) | ​ | $ | 42,565 | ​ | $ | 36,272
Accrued employee benefits | ​ |  | 5,271 | ​ |  | 4,698
Accrued gas and equipment purchases | ​ |  | 17,764 | ​ |  | 17,838
Accrued interest | ​ |  | 1,451 | ​ |  | 1,454
Accrued property and other taxes | ​ |  | 5,628 | ​ |  | 6,914
Accrued salaries and wages | ​ |  | 11,902 | ​ |  | 7,231
Asset retirement obligation (current portion) | ​ | ​ | 7,047 | ​ | ​ | 8,838
Other(2) | ​ |  | 13,935 | ​ |  | 14,293
Total accrued liabilities | ​ | $ | 105,563 | ​ | $ | 97,538
(1) | Includes amount for RINs, LCFS Credits, and AFTC payable to third parties.
(2) | No individual item in “Other” exceeds 5% of total current liabilities.

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