DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES (Details) (Derivatives Designated as Hedging Instruments)	Mar. 31, 2013 MMcf
Natural Gas Collars with contract period of Apr. 2013 - Dec. 2013 Tranche 1
Derivative disclosures
Collar Ceiling Price	4.12
Collar Floor Price	3.09
Volume	26.7
Natural Gas Collars with contract period of Apr. 2013 - Dec. 2013 Tranche 2
Derivative disclosures
Collar Ceiling Price	4.01
Collar Floor Price	3.35
Volume	26.7
Natural Gas Collars with contract period of Apr. 2013 - Dec. 2013 Tranche 3
Derivative disclosures
Collar Ceiling Price	4.12
Collar Floor Price	3.40
Volume	13.4
Natural Gas Collars with contract period of Apr. 2013 - Dec. 2013 Tranche 4
Derivative disclosures
Collar Ceiling Price	3.99
Collar Floor Price	3.60
Volume	13.4
Natural Gas Collars with contract period of Apr. 2013 - Dec. 2013 Tranche 5
Derivative disclosures
Collar Ceiling Price	4.17
Collar Floor Price	3.60
Volume	13.4
Natural Gas Collars with contract period of Apr. 2013 - Dec. 2013 Tranche 6
Derivative disclosures
Collar Ceiling Price	4.16
Collar Floor Price	3.76
Volume	13.4
Natural Gas Collars with contract period of Apr. 2013 - Dec. 2013 Tranche 7
Derivative disclosures
Collar Ceiling Price	4.34
Collar Floor Price	3.86
Volume	13.4
Natural Gas Collars with contract period of Apr. 2013 - Dec. 2013 Tranche 8
Derivative disclosures
Collar Ceiling Price	4.41
Collar Floor Price	3.96
Volume	13.4
Natural Gas Collars with contract period of Apr. 2013 - Dec. 2013 Tranche 9
Derivative disclosures
Collar Ceiling Price	6.20
Collar Floor Price	5.15
Volume	13.4
Natural Gas Collars with contract period of Apr. 2013 - Dec. 2014 Tranche 1
Derivative disclosures
Collar Ceiling Price	4.58
Collar Floor Price	3.60
Volume	31.1
Natural Gas Collars with contract period of Apr. 2013 - Dec. 2014 Tranche 2
Derivative disclosures
Collar Ceiling Price	4.56
Collar Floor Price	3.96
Volume	31.1
Natural Gas Collars with contract period of Jan. 2014 - Dec. 2014 Tranche 1
Derivative disclosures
Collar Ceiling Price	4.66
Collar Floor Price	3.86
Volume	17.7
Natural Gas Collars with contract period of Jan. 2014 - Dec. 2014 Tranche 2
Derivative disclosures
Collar Ceiling Price	4.64
Collar Floor Price	4.12
Volume	35.5
Crude Oil Swaps with contract period of Apr. 2013 - Dec. 2013 Tranche 1
Derivative disclosures
Weighted-Average Contract Price	101.90
Volume	825