XML 52 R41.htm IDEA: XBRL DOCUMENT v3.10.0.1
OIL AND NATURAL GAS PROPERTIES (Details)
6 Months Ended
Jun. 30, 2018
$ / MMBTU
$ / bbl
Jun. 30, 2017
$ / MMBTU
$ / bbl
Ceiling Limitation Disclosures    
First day average of the (WTI) crude oil spot price (in dollars per barrel) | $ / bbl 57.67 48.95
First day average of the Henry Hub natural gas price (in dollars per Mmbtu) | $ / MMBTU 2.92 3.01