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Commitments and Contingencies (Tables) | 12 Months Ended
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Dec. 31, 2019
Commitments And Contingencies Disclosure [Abstract] |
Future Minimum Volume Purchase Requirements | The following provides total annual future minimum volume purchase requirements (in thousands of gallons):
2020 |  |  | 463,521 |
2021 |  |  | 436,153 |
2022 |  |  | 427,584 |
2023 |  |  | 363,250 |
2024 |  |  | 251,917 |
Thereafter |  |  | 978,600 |
Total |  |  | 2,921,025 |

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- Definition Tabular disclosure of contractual obligation by timing of payment due. Includes, but is not limited to, long-term debt obligation, lease obligation, and purchase obligation. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher SEC -Name Regulation S-K (SK) -Number 229 -Section 303 -Paragraph (a) -Subparagraph (5) + Details
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