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Divestitures	3 Months Ended
Divestitures	Mar. 31, 2017
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 $14.8 million during the first three months of 2017, compared to $37.4 million during the first three months of 2016. Proceeds from those sales reduced the net book value of our full cost pool with no gain or loss recognized.