Quarterly report pursuant to Section 13 or 15(d)

DERIVATIVE INSTRUMENTS (Narrative) (Details)

v3.19.2
DERIVATIVE INSTRUMENTS (Narrative) (Details) - 2019
1 Months Ended 6 Months Ended
Dec. 31, 2018
MMBTU
$ / MMBTU
Jun. 30, 2019
Derivative [Line Items]    
Counterparty option to extend the original terms, number of months   12 months
Daily volume (in MMBtu) | MMBTU 100,000  
Weighted average price (in usd per MMBtu or Bbl) | $ / MMBTU 3.05