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Commitments and Contingencies (Tables)
 6 Months Ended
Jun. 30, 2020
Commitments and Contingencies Disclosure [Abstract]  
Other Commitments
Future proppant, including rail car transport, and chemical commitments based on Company forecasts are as follows:
($ in thousands)
Remainder of 2020$62,684  
202183,571  
202218,701  
20239,524  
202410,268  
Thereafter7,664  
$192,412