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Revenues - Disaggregation of Revenue (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Disaggregation of Revenue        
Total revenues $ 58,369 $ 97,660 $ 206,993 $ 264,250
Oil        
Disaggregation of Revenue        
Total revenues 44,072 63,994 142,846 166,548
NGL        
Disaggregation of Revenue        
Total revenues 6,362 18,776 28,886 52,111
Natural gas        
Disaggregation of Revenue        
Total revenues 7,754 14,721 34,700 45,102
Other        
Disaggregation of Revenue        
Total revenues $ 181 $ 169 $ 561 $ 489