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Divestitures
3 Months Ended
Mar. 31, 2018
Property, Plant and Equipment Impairment or Disposal [Abstract]  
Divestitures
DIVESTITURES

Oil and Natural Gas

We sold non-core oil and natural gas assets, net of related expenses, for $21.7 million during the first three months of 2018, compared to $14.8 million during the first three months of 2017. Proceeds from those sales reduced the net book value of our full cost pool with no gain or loss recognized.