Quarterly report pursuant to Section 13 or 15(d)

DERIVATIVE INSTRUMENTS (Narrative) (Details)

v3.10.0.1
DERIVATIVE INSTRUMENTS (Narrative) (Details) - 2019
9 Months Ended
Sep. 30, 2018
MMBTU
$ / MMBTU
Derivative [Line Items]  
Daily volume (in MMBtu) | MMBTU 100,000
Weighted average price (in usd per MMBtu or Bbl) | $ / MMBTU 3.05