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Revenue from Contracts with Customers - Disaggregation of Revenue (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Revenue from Contracts with Customers |  |  |
Total revenue | $ 415,865 | $ 425,159 | $ 420,164
Contra revenue charge | 60,764 | 60,609 | 24,302
Not Designated as Hedging Instrument | Commodity Swaps |  |  |
Revenue from Contracts with Customers |  |  |
Net settlement of commodity swap derivative instruments | 2,400 | 4,900 | 7,800
Fuel Sales |  |  |
Revenue from Contracts with Customers |  |  |
Total revenue | 258,858 | 286,956 | 281,103
RIN Credits |  |  |
Revenue from Contracts with Customers |  |  |
Total revenue | 39,019 | 25,860 | 34,635
LCFS Credits |  |  |
Revenue from Contracts with Customers |  |  |
Total revenue | 9,954 | 9,885 | 12,634
AFTC |  |  |
Revenue from Contracts with Customers |  |  |
Total revenue | 23,817 | 20,854 | 21,760
LCFS Credits |  |  |
Revenue from Contracts with Customers |  |  |
Total revenue | 331,517 | 343,397 | 350,649
Station construction sales |  |  |
Revenue from Contracts with Customers |  |  |
Total revenue | 25,192 | 26,427 | 22,346
Product revenue |  |  |
Revenue from Contracts with Customers |  |  |
Total revenue | 356,709 | 369,824 | 372,995
Volume-related, O&M services |  |  |
Revenue from Contracts with Customers |  |  |
Total revenue | 56,886 | 52,660 | 45,901
Other services |  |  |
Revenue from Contracts with Customers |  |  |
Total revenue | 2,270 | 2,675 | 1,268
Service revenue |  |  |
Revenue from Contracts with Customers |  |  |
Total revenue | 59,156 | 55,335 | 47,169
Volume -Related |  |  |
Revenue from Contracts with Customers |  |  |
Gain (loss) due to changes in fair value | $ (131) | $ (158) | $ 517

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