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Commitments and Contingencies - Gross Future Minimum Transportation Demand and Firm Processing Charges (Details)
$ in Thousands
Dec. 31, 2019
USD ($)
Commitments and Contingencies Disclosure [Abstract]  
2020 $ 23,134
2021 19,778
2022 13,064
2023 14,600
2024 14,640
Thereafter 4,800
Total $ 90,016