DERIVATIVE FINANCIAL INSTRUMENTS (Details) (Commodity derivatives)	Dec. 31, 2012
Oil | Brent Put | 01/01/13 - 09/30/13
Derivative financial instruments
Volume in BBl or Mbtu per day	1,375
Price per Mcf or Bbl	70
Natural Gas | NYMEX swap | 01/01/13 - 12/31/13
Derivative financial instruments
Volume in BBl or Mbtu per day	7,000
Price per Mcf or Bbl	3.39
Natural Gas | NYMEX swap | 01/01/14 - 12/31/14
Derivative financial instruments
Volume in BBl or Mbtu per day	7,000
Price per Mcf or Bbl	3.79