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Accrued Liabilities (Details) - USD ($)
$ in Thousands
Mar. 31, 2024
Dec. 31, 2023
Payables and Accruals [Abstract]    
Accrued alternative fuels incentives $ 33,891 $ 41,609
Accrued employee benefits 3,856 5,315
Accrued gas and equipment purchases 21,558 17,485
Accrued interest 1,610 1,451
Accrued property and other taxes 4,073 4,502
Accrued salaries and wages 4,988 8,697
Other 13,696 12,475
Total accrued liabilities $ 83,672 $ 91,534