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Revenues - Disaggregation of Revenue (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Disaggregation of Revenue        
Total revenues $ 75,388 $ 79,462 $ 148,624 $ 166,590
Oil        
Disaggregation of Revenue        
Total revenues 55,615 49,219 98,774 102,554
NGL        
Disaggregation of Revenue        
Total revenues 9,413 16,946 22,524 33,335
Natural gas        
Disaggregation of Revenue        
Total revenues 10,168 13,139 26,946 30,381
Other        
Disaggregation of Revenue        
Total revenues $ 192 $ 158 $ 380 $ 320