Revenues (Tables)
3 Months Ended
Mar. 31, 2019
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:
 
For the Three Months Ended March 31,
 
2019
 
2018
Operating revenues (in thousands):
 
 
 
Oil sales
$
175,554

 
$
174,841

Natural gas sales
12,497

 
18,580

NGL sales
26,518

 
22,477

Oil and gas sales
$
214,569

 
$
215,898