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Revenues (Tables)
6 Months Ended
Jun. 30, 2021
Revenue from Contract with Customer [Abstract]  
Summary of Oil and Gas Revenues
Oil and gas revenues presented within the consolidated statements of operations relate to the sale of oil, natural gas and NGLs as shown below:
Three Months Ended June 30,Six Months Ended June 30,
202120202021

2020
Operating revenues (in thousands):
Oil sales
$177,105 $73,100 $310,831 $243,605 
Natural gas sales
27,015 8,787 62,466 17,145 
NGL sales
28,457 8,622 51,671 22,528 
Oil and gas sales
$232,577 $90,509 $424,968 $283,278