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Accrued Liabilities (Details) - USD ($)
$ in Thousands
Sep. 30, 2022
Dec. 31, 2021
Payables and Accruals [Abstract]    
Accrued alternative fuels incentives $ 30,948 $ 28,106
Accrued employee benefits 4,476 4,547
Accrued gas and equipment purchases 22,532 17,158
Accrued interest 1,685 893
Accrued property and other taxes 4,075 3,369
Accrued salaries and wages 6,687 8,172
Embedded derivatives 14 0
Other 14,783 12,914
Total accrued liabilities $ 85,200 $ 75,159