Oil and natural gas properties, net of accumulated impairment (under successful efforts accounting) (Tables)
|6 Months Ended|
Jun. 30, 2016
|Extractive Industries [Abstract]|
|Components of Oil and Natural Gas Properties||
Oil and natural gas properties are comprised of the following:
Tabular disclosure of the results of operations for oil and gas producing activities for the year.
Reference 1: http://www.xbrl.org/2003/role/presentationRef