XML 32 R18.htm IDEA: XBRL DOCUMENT v2.4.0.8
Oil and natural gas properties (under successful efforts accounting) (Tables)
 9 Months Ended
Sep. 30, 2014
Extractive Industries [Abstract]  
Components of Oil and Natural Gas Properties
Oil and natural gas properties are comprised of the following:
 
 
September 30,
2014
 
December 31, 2013
Oil and natural gas properties
$
6,619,685

 
$
3,715,648

Less: accumulated depletion
(1,553,356
)
 
(1,517,836
)
Oil and natural gas properties, net
$
5,066,329

 
$
2,197,812