XML 48 R37.htm IDEA: XBRL DOCUMENT v3.19.1
Revenue Recognition - Disaggregation of Revenue (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Disaggregation of Revenue [Line Items]    
Revenues and other $ 141,661 $ 131,862
Gains (losses) on oil derivatives (63,124) (34,644)
Other revenues 117 66
Total revenues and other 76,539 97,284
Oil sales    
Disaggregation of Revenue [Line Items]    
Revenues and other 123,450 117,902
Natural gas sales    
Disaggregation of Revenue [Line Items]    
Revenues and other 6,715 6,563
Gains (losses) on oil derivatives 2,115 0
Natural gas liquids sales    
Disaggregation of Revenue [Line Items]    
Revenues and other 937 1,159
Electricity sales    
Disaggregation of Revenue [Line Items]    
Revenues and other 9,729 5,453
Marketing revenues    
Disaggregation of Revenue [Line Items]    
Revenues and other 830 785
Oil    
Disaggregation of Revenue [Line Items]    
Gains (losses) on oil derivatives $ (65,239) $ (34,644)