Quarterly report pursuant to Section 13 or 15(d)

DERIVATIVE INSTRUMENTS (Schedule of Derivative Instruments) (Details)

v3.19.1
DERIVATIVE INSTRUMENTS (Schedule of Derivative Instruments) (Details)
 3 Months Ended
Mar. 31, 2019
MMBTU
$ / bbl
$ / MMBTU
bbl
NYMEX Henry Hub Swap - 2019  
Derivative [Line Items]  
Daily Volume (MMBtu/day) | MMBTU 1,314,000
Weighted average price (in usd per MMBtu or Bbl) | $ / MMBTU (2.82)
NYMEX Henry Hub Swap - 2019 | Short | Call Option  
Derivative [Line Items]  
Daily Volume (MMBtu/day) | MMBTU 30,000
Weighted average price (in usd per MMBtu or Bbl) | $ / MMBTU (3.10)
NYMEX Henry Hub Swap - 2020  
Derivative [Line Items]  
Daily Volume (MMBtu/day) | MMBTU 204,000
Weighted average price (in usd per MMBtu or Bbl) | $ / MMBTU (2.77)
NYMEX WTI Swap - 2019  
Derivative [Line Items]  
Daily Volume (Bbls/day) | bbl 2,000
Weighted average price (in usd per MMBtu or Bbl) | $ / bbl (59.44)
Mont Belvieu C2 - 2019  
Derivative [Line Items]  
Daily Volume (Bbls/day) | bbl 1,000
Weighted average price (in usd per MMBtu or Bbl) | $ / bbl (18.48)
Mont Belvieu C3 Swap - 2019  
Derivative [Line Items]  
Daily Volume (Bbls/day) | bbl 4,000
Weighted average price (in usd per MMBtu or Bbl) | $ / bbl (29.02)
Mont Belvieu C5 Swap - 2019  
Derivative [Line Items]  
Daily Volume (Bbls/day) | bbl 500
Weighted average price (in usd per MMBtu or Bbl) | $ / bbl (54.08)
Transco Zone 4 - 2019 | Long  
Derivative [Line Items]  
Daily Volume (MMBtu/day) | MMBTU 60,000
Weighted average price (in usd per MMBtu or Bbl) | $ / MMBTU (0.05)
Transco Zone 4 - 2020 | Long  
Derivative [Line Items]  
Daily Volume (MMBtu/day) | MMBTU 60,000
Weighted average price (in usd per MMBtu or Bbl) | $ / MMBTU (0.05)
Fixed Spread - 2020 | Long  
Derivative [Line Items]  
Daily Volume (MMBtu/day) | MMBTU 10,000
Weighted average price (in usd per MMBtu or Bbl) | $ / MMBTU (0.54)