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Accrued Liabilities (Tables) | 3 Months Ended
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Mar. 31, 2024
Payables and Accruals [Abstract] |
Schedule of accrued liabilities | Accrued liabilities as of December 31, 2023 and March 31, 2024 consisted of the following (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, | ​ | March 31,
​ |  | 2023 |  | 2024
Accrued alternative fuels incentives (1) | ​ | $ | 41,609 | ​ | $ | 33,891
Accrued employee benefits | ​ |  | 5,315 | ​ |  | 3,856
Accrued gas and equipment purchases | ​ |  | 17,485 | ​ |  | 21,558
Accrued interest | ​ |  | 1,451 | ​ |  | 1,610
Accrued property and other taxes | ​ |  | 4,502 | ​ |  | 4,073
Accrued salaries and wages | ​ |  | 8,697 | ​ |  | 4,988
Other (2) | ​ |  | 12,475 | ​ |  | 13,696
Total accrued liabilities | ​ | $ | 91,534 | ​ | $ | 83,672
(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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