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Commitments and Contingencies - Proppant, Chemical and Rail Car Commitments (Details)
$ in Thousands
Sep. 30, 2020
USD ($)
Commitments and Contingencies Disclosure [Abstract]  
Remainder of 2020 $ 29,993
2021 67,533
2022 18,147
2023 9,524
2024 10,268
Thereafter 7,664
Other commitment $ 143,129