DERIVATIVE INSTRUMENTS AND PRICE RISK MANAGEMENT (Details) (USD $) | 3 Months Ended |
Mar. 31, 2014 | Mar. 31, 2013 |
Crude Oil Derivative Contracts Cash-flow Not Designated as Hedges [Abstract] | ' | ' |
Total volumes of open contracts | 5,700,000 | ' |
Weighted average price on open contracts | $89.63 | ' |
Oil Swap 1 [Member] | ' | ' |
Crude Oil Derivative Contracts Cash-flow Not Designated as Hedges [Abstract] | ' | ' |
Oil (in barrels) | 180,000 | ' |
Fixed Price (in dollars per barrel) | 89.5 | ' |
Oil Swap 1 [Member] | Minimum [Member] | ' | ' |
Crude Oil Derivative Contracts Cash-flow Not Designated as Hedges [Abstract] | ' | ' |
Settlement Period | 1-Apr-14 | ' |
Oil Swap 1 [Member] | Maximum [Member] | ' | ' |
Crude Oil Derivative Contracts Cash-flow Not Designated as Hedges [Abstract] | ' | ' |
Settlement Period | 30-Jun-14 | ' |
Oil Swap 2 [Member] | ' | ' |
Crude Oil Derivative Contracts Cash-flow Not Designated as Hedges [Abstract] | ' | ' |
Oil (in barrels) | 120,000 | ' |
Fixed Price (in dollars per barrel) | 90 | ' |
Oil Swap 2 [Member] | Minimum [Member] | ' | ' |
Crude Oil Derivative Contracts Cash-flow Not Designated as Hedges [Abstract] | ' | ' |
Settlement Period | 1-Apr-14 | ' |
Oil Swap 2 [Member] | Maximum [Member] | ' | ' |
Crude Oil Derivative Contracts Cash-flow Not Designated as Hedges [Abstract] | ' | ' |
Settlement Period | 30-Jun-14 | ' |
Oil Swap 3 [Member] | ' | ' |
Crude Oil Derivative Contracts Cash-flow Not Designated as Hedges [Abstract] | ' | ' |
Oil (in barrels) | 120,000 | ' |
Fixed Price (in dollars per barrel) | 100 | ' |
Oil Swap 3 [Member] | Minimum [Member] | ' | ' |
Crude Oil Derivative Contracts Cash-flow Not Designated as Hedges [Abstract] | ' | ' |
Settlement Period | 1-Apr-14 | ' |
Oil Swap 3 [Member] | Maximum [Member] | ' | ' |
Crude Oil Derivative Contracts Cash-flow Not Designated as Hedges [Abstract] | ' | ' |
Settlement Period | 30-Jun-14 | ' |
Oil Swap 4 [Member] | ' | ' |
Crude Oil Derivative Contracts Cash-flow Not Designated as Hedges [Abstract] | ' | ' |
Oil (in barrels) | 180,000 | ' |
Fixed Price (in dollars per barrel) | 91.65 | ' |
Oil Swap 4 [Member] | Minimum [Member] | ' | ' |
Crude Oil Derivative Contracts Cash-flow Not Designated as Hedges [Abstract] | ' | ' |
Settlement Period | 1-Apr-14 | ' |
Oil Swap 4 [Member] | Maximum [Member] | ' | ' |
Crude Oil Derivative Contracts Cash-flow Not Designated as Hedges [Abstract] | ' | ' |
Settlement Period | 31-Dec-14 | ' |
Oil Swap 5 [Member] | ' | ' |
Crude Oil Derivative Contracts Cash-flow Not Designated as Hedges [Abstract] | ' | ' |
Oil (in barrels) | 285,000 | ' |
Fixed Price (in dollars per barrel) | 88.55 | ' |
Oil Swap 5 [Member] | Minimum [Member] | ' | ' |
Crude Oil Derivative Contracts Cash-flow Not Designated as Hedges [Abstract] | ' | ' |
Settlement Period | 1-Apr-14 | ' |
Oil Swap 5 [Member] | Maximum [Member] | ' | ' |
Crude Oil Derivative Contracts Cash-flow Not Designated as Hedges [Abstract] | ' | ' |
Settlement Period | 31-Dec-14 | ' |
Oil Swap 6 [Member] | ' | ' |
Crude Oil Derivative Contracts Cash-flow Not Designated as Hedges [Abstract] | ' | ' |
Oil (in barrels) | 285,000 | ' |
Fixed Price (in dollars per barrel) | 88.6 | ' |
Oil Swap 6 [Member] | Minimum [Member] | ' | ' |
Crude Oil Derivative Contracts Cash-flow Not Designated as Hedges [Abstract] | ' | ' |
Settlement Period | 1-Apr-14 | ' |
Oil Swap 6 [Member] | Maximum [Member] | ' | ' |
Crude Oil Derivative Contracts Cash-flow Not Designated as Hedges [Abstract] | ' | ' |
Settlement Period | 31-Dec-14 | ' |
Oil Swap 7 [Member] | ' | ' |
Crude Oil Derivative Contracts Cash-flow Not Designated as Hedges [Abstract] | ' | ' |
Oil (in barrels) | 285,000 | ' |
Fixed Price (in dollars per barrel) | 88.4 | ' |
Oil Swap 7 [Member] | Minimum [Member] | ' | ' |
Crude Oil Derivative Contracts Cash-flow Not Designated as Hedges [Abstract] | ' | ' |
Settlement Period | 1-Apr-14 | ' |
Oil Swap 7 [Member] | Maximum [Member] | ' | ' |
Crude Oil Derivative Contracts Cash-flow Not Designated as Hedges [Abstract] | ' | ' |
Settlement Period | 31-Dec-14 | ' |
Oil Swap 8 [Member] | ' | ' |
Crude Oil Derivative Contracts Cash-flow Not Designated as Hedges [Abstract] | ' | ' |
Oil (in barrels) | 285,000 | ' |
Fixed Price (in dollars per barrel) | 88.5 | ' |
Oil Swap 8 [Member] | Minimum [Member] | ' | ' |
Crude Oil Derivative Contracts Cash-flow Not Designated as Hedges [Abstract] | ' | ' |
Settlement Period | 1-Apr-14 | ' |
Oil Swap 8 [Member] | Maximum [Member] | ' | ' |
Crude Oil Derivative Contracts Cash-flow Not Designated as Hedges [Abstract] | ' | ' |
Settlement Period | 31-Dec-14 | ' |
Oil Swap 9 [Member] | ' | ' |
Crude Oil Derivative Contracts Cash-flow Not Designated as Hedges [Abstract] | ' | ' |
Oil (in barrels) | 90,000 | ' |
Fixed Price (in dollars per barrel) | 91.35 | ' |
Oil Swap 9 [Member] | Minimum [Member] | ' | ' |
Crude Oil Derivative Contracts Cash-flow Not Designated as Hedges [Abstract] | ' | ' |
Settlement Period | 1-Apr-14 | ' |
Oil Swap 9 [Member] | Maximum [Member] | ' | ' |
Crude Oil Derivative Contracts Cash-flow Not Designated as Hedges [Abstract] | ' | ' |
Settlement Period | 31-Dec-14 | ' |
Oil Swap 10 [Member] | ' | ' |
Crude Oil Derivative Contracts Cash-flow Not Designated as Hedges [Abstract] | ' | ' |
Oil (in barrels) | 90,000 | ' |
Fixed Price (in dollars per barrel) | 90 | ' |
Oil Swap 10 [Member] | Minimum [Member] | ' | ' |
Crude Oil Derivative Contracts Cash-flow Not Designated as Hedges [Abstract] | ' | ' |
Settlement Period | 1-Apr-14 | ' |
Oil Swap 10 [Member] | Maximum [Member] | ' | ' |
Crude Oil Derivative Contracts Cash-flow Not Designated as Hedges [Abstract] | ' | ' |
Settlement Period | 31-Dec-14 | ' |
Oil Swap 11 [Member] | ' | ' |
Crude Oil Derivative Contracts Cash-flow Not Designated as Hedges [Abstract] | ' | ' |
Oil (in barrels) | 180,000 | ' |
Fixed Price (in dollars per barrel) | 90.15 | ' |
Oil Swap 11 [Member] | Minimum [Member] | ' | ' |
Crude Oil Derivative Contracts Cash-flow Not Designated as Hedges [Abstract] | ' | ' |
Settlement Period | 1-Apr-14 | ' |
Oil Swap 11 [Member] | Maximum [Member] | ' | ' |
Crude Oil Derivative Contracts Cash-flow Not Designated as Hedges [Abstract] | ' | ' |
Settlement Period | 31-Dec-14 | ' |
Oil Swap 12 [Member] | ' | ' |
Crude Oil Derivative Contracts Cash-flow Not Designated as Hedges [Abstract] | ' | ' |
Oil (in barrels) | 180,000 | ' |
Fixed Price (in dollars per barrel) | 91 | ' |
Oil Swap 12 [Member] | Minimum [Member] | ' | ' |
Crude Oil Derivative Contracts Cash-flow Not Designated as Hedges [Abstract] | ' | ' |
Settlement Period | 1-Apr-14 | ' |
Oil Swap 12 [Member] | Maximum [Member] | ' | ' |
Crude Oil Derivative Contracts Cash-flow Not Designated as Hedges [Abstract] | ' | ' |
Settlement Period | 31-Dec-14 | ' |
Oil Swap 13 [Member] | ' | ' |
Crude Oil Derivative Contracts Cash-flow Not Designated as Hedges [Abstract] | ' | ' |
Oil (in barrels) | 90,000 | ' |
Fixed Price (in dollars per barrel) | 93 | ' |
Oil Swap 13 [Member] | Minimum [Member] | ' | ' |
Crude Oil Derivative Contracts Cash-flow Not Designated as Hedges [Abstract] | ' | ' |
Settlement Period | 1-Apr-14 | ' |
Oil Swap 13 [Member] | Maximum [Member] | ' | ' |
Crude Oil Derivative Contracts Cash-flow Not Designated as Hedges [Abstract] | ' | ' |
Settlement Period | 31-Dec-14 | ' |
Oil Swap 14 [Member] | ' | ' |
Crude Oil Derivative Contracts Cash-flow Not Designated as Hedges [Abstract] | ' | ' |
Oil (in barrels) | 450,000 | ' |
Fixed Price (in dollars per barrel) | 89.15 | ' |
Oil Swap 14 [Member] | Minimum [Member] | ' | ' |
Crude Oil Derivative Contracts Cash-flow Not Designated as Hedges [Abstract] | ' | ' |
Settlement Period | 1-Apr-14 | ' |
Oil Swap 14 [Member] | Maximum [Member] | ' | ' |
Crude Oil Derivative Contracts Cash-flow Not Designated as Hedges [Abstract] | ' | ' |
Settlement Period | 30-Jun-15 | ' |
Oil Swap 15 [Member] | ' | ' |
Crude Oil Derivative Contracts Cash-flow Not Designated as Hedges [Abstract] | ' | ' |
Oil (in barrels) | 120,000 | ' |
Fixed Price (in dollars per barrel) | 90 | ' |
Oil Swap 15 [Member] | Minimum [Member] | ' | ' |
Crude Oil Derivative Contracts Cash-flow Not Designated as Hedges [Abstract] | ' | ' |
Settlement Period | 1-Jul-14 | ' |
Oil Swap 15 [Member] | Maximum [Member] | ' | ' |
Crude Oil Derivative Contracts Cash-flow Not Designated as Hedges [Abstract] | ' | ' |
Settlement Period | 31-Dec-14 | ' |
Oil Swap 16 [Member] | ' | ' |
Crude Oil Derivative Contracts Cash-flow Not Designated as Hedges [Abstract] | ' | ' |
Oil (in barrels) | 120,000 | ' |
Fixed Price (in dollars per barrel) | 90 | ' |
Oil Swap 16 [Member] | Minimum [Member] | ' | ' |
Crude Oil Derivative Contracts Cash-flow Not Designated as Hedges [Abstract] | ' | ' |
Settlement Period | 1-Jul-14 | ' |
Oil Swap 16 [Member] | Maximum [Member] | ' | ' |
Crude Oil Derivative Contracts Cash-flow Not Designated as Hedges [Abstract] | ' | ' |
Settlement Period | 31-Dec-14 | ' |
Oil Swap 17 [Member] | ' | ' |
Crude Oil Derivative Contracts Cash-flow Not Designated as Hedges [Abstract] | ' | ' |
Oil (in barrels) | 120,000 | ' |
Fixed Price (in dollars per barrel) | 93.5 | ' |
Oil Swap 17 [Member] | Minimum [Member] | ' | ' |
Crude Oil Derivative Contracts Cash-flow Not Designated as Hedges [Abstract] | ' | ' |
Settlement Period | 1-Jul-14 | ' |
Oil Swap 17 [Member] | Maximum [Member] | ' | ' |
Crude Oil Derivative Contracts Cash-flow Not Designated as Hedges [Abstract] | ' | ' |
Settlement Period | 31-Dec-14 | ' |
Oil Swap 18 [Member] | ' | ' |
Crude Oil Derivative Contracts Cash-flow Not Designated as Hedges [Abstract] | ' | ' |
Oil (in barrels) | 30,000 | ' |
Fixed Price (in dollars per barrel) | 90.58 | ' |
Oil Swap 18 [Member] | Minimum [Member] | ' | ' |
Crude Oil Derivative Contracts Cash-flow Not Designated as Hedges [Abstract] | ' | ' |
Settlement Period | 1-Jul-14 | ' |
Oil Swap 18 [Member] | Maximum [Member] | ' | ' |
Crude Oil Derivative Contracts Cash-flow Not Designated as Hedges [Abstract] | ' | ' |
Settlement Period | 31-Dec-14 | ' |
Oil Swap 19 [Member] | ' | ' |
Crude Oil Derivative Contracts Cash-flow Not Designated as Hedges [Abstract] | ' | ' |
Oil (in barrels) | 60,000 | ' |
Fixed Price (in dollars per barrel) | 90.5 | ' |
Oil Swap 19 [Member] | Minimum [Member] | ' | ' |
Crude Oil Derivative Contracts Cash-flow Not Designated as Hedges [Abstract] | ' | ' |
Settlement Period | 1-Jan-15 | ' |
Oil Swap 19 [Member] | Maximum [Member] | ' | ' |
Crude Oil Derivative Contracts Cash-flow Not Designated as Hedges [Abstract] | ' | ' |
Settlement Period | 30-Jun-15 | ' |
Oil Swap 20 [Member] | ' | ' |
Crude Oil Derivative Contracts Cash-flow Not Designated as Hedges [Abstract] | ' | ' |
Oil (in barrels) | 180,000 | ' |
Fixed Price (in dollars per barrel) | 88.55 | ' |
Oil Swap 20 [Member] | Minimum [Member] | ' | ' |
Crude Oil Derivative Contracts Cash-flow Not Designated as Hedges [Abstract] | ' | ' |
Settlement Period | 1-Jan-15 | ' |
Oil Swap 20 [Member] | Maximum [Member] | ' | ' |
Crude Oil Derivative Contracts Cash-flow Not Designated as Hedges [Abstract] | ' | ' |
Settlement Period | 30-Jun-15 | ' |
Oil Swap 21 [Member] | ' | ' |
Crude Oil Derivative Contracts Cash-flow Not Designated as Hedges [Abstract] | ' | ' |
Oil (in barrels) | 180,000 | ' |
Fixed Price (in dollars per barrel) | 88 | ' |
Oil Swap 21 [Member] | Minimum [Member] | ' | ' |
Crude Oil Derivative Contracts Cash-flow Not Designated as Hedges [Abstract] | ' | ' |
Settlement Period | 1-Jan-15 | ' |
Oil Swap 21 [Member] | Maximum [Member] | ' | ' |
Crude Oil Derivative Contracts Cash-flow Not Designated as Hedges [Abstract] | ' | ' |
Settlement Period | 30-Jun-15 | ' |
Oil Swap 22 [Member] | ' | ' |
Crude Oil Derivative Contracts Cash-flow Not Designated as Hedges [Abstract] | ' | ' |
Oil (in barrels) | 60,000 | ' |
Fixed Price (in dollars per barrel) | 90.75 | ' |
Oil Swap 22 [Member] | Minimum [Member] | ' | ' |
Crude Oil Derivative Contracts Cash-flow Not Designated as Hedges [Abstract] | ' | ' |
Settlement Period | 1-Jan-15 | ' |
Oil Swap 22 [Member] | Maximum [Member] | ' | ' |
Crude Oil Derivative Contracts Cash-flow Not Designated as Hedges [Abstract] | ' | ' |
Settlement Period | 30-Jun-15 | ' |
Oil Swap 23 [Member] | ' | ' |
Crude Oil Derivative Contracts Cash-flow Not Designated as Hedges [Abstract] | ' | ' |
Oil (in barrels) | 60,000 | ' |
Fixed Price (in dollars per barrel) | 90.25 | ' |
Oil Swap 23 [Member] | Minimum [Member] | ' | ' |
Crude Oil Derivative Contracts Cash-flow Not Designated as Hedges [Abstract] | ' | ' |
Settlement Period | 1-Jan-15 | ' |
Oil Swap 23 [Member] | Maximum [Member] | ' | ' |
Crude Oil Derivative Contracts Cash-flow Not Designated as Hedges [Abstract] | ' | ' |
Settlement Period | 30-Jun-15 | ' |
Oil Swap 24 [Member] | ' | ' |
Crude Oil Derivative Contracts Cash-flow Not Designated as Hedges [Abstract] | ' | ' |
Oil (in barrels) | 90,000 | ' |
Fixed Price (in dollars per barrel) | 89 | ' |
Oil Swap 24 [Member] | Minimum [Member] | ' | ' |
Crude Oil Derivative Contracts Cash-flow Not Designated as Hedges [Abstract] | ' | ' |
Settlement Period | 1-Jan-15 | ' |
Oil Swap 24 [Member] | Maximum [Member] | ' | ' |
Crude Oil Derivative Contracts Cash-flow Not Designated as Hedges [Abstract] | ' | ' |
Settlement Period | 30-Jun-15 | ' |
Oil Swap 25 [Member] | ' | ' |
Crude Oil Derivative Contracts Cash-flow Not Designated as Hedges [Abstract] | ' | ' |
Oil (in barrels) | 90,000 | ' |
Fixed Price (in dollars per barrel) | 89 | ' |
Oil Swap 25 [Member] | Minimum [Member] | ' | ' |
Crude Oil Derivative Contracts Cash-flow Not Designated as Hedges [Abstract] | ' | ' |
Settlement Period | 1-Jan-15 | ' |
Oil Swap 25 [Member] | Maximum [Member] | ' | ' |
Crude Oil Derivative Contracts Cash-flow Not Designated as Hedges [Abstract] | ' | ' |
Settlement Period | 30-Jun-15 | ' |
Oil Swap 26 [Member] | ' | ' |
Crude Oil Derivative Contracts Cash-flow Not Designated as Hedges [Abstract] | ' | ' |
Oil (in barrels) | 720,000 | ' |
Fixed Price (in dollars per barrel) | 89 | ' |
Oil Swap 26 [Member] | Minimum [Member] | ' | ' |
Crude Oil Derivative Contracts Cash-flow Not Designated as Hedges [Abstract] | ' | ' |
Settlement Period | 1-Jan-15 | ' |
Oil Swap 26 [Member] | Maximum [Member] | ' | ' |
Crude Oil Derivative Contracts Cash-flow Not Designated as Hedges [Abstract] | ' | ' |
Settlement Period | 31-Dec-15 | ' |
Oil Swap 27 [Member] | ' | ' |
Crude Oil Derivative Contracts Cash-flow Not Designated as Hedges [Abstract] | ' | ' |
Oil (in barrels) | 360,000 | ' |
Fixed Price (in dollars per barrel) | 89 | ' |
Oil Swap 27 [Member] | Minimum [Member] | ' | ' |
Crude Oil Derivative Contracts Cash-flow Not Designated as Hedges [Abstract] | ' | ' |
Settlement Period | 1-Jan-15 | ' |
Oil Swap 27 [Member] | Maximum [Member] | ' | ' |
Crude Oil Derivative Contracts Cash-flow Not Designated as Hedges [Abstract] | ' | ' |
Settlement Period | 31-Dec-15 | ' |
Oil Swap 29 [Member] | ' | ' |
Crude Oil Derivative Contracts Cash-flow Not Designated as Hedges [Abstract] | ' | ' |
Oil (in barrels) | 180,000 | ' |
Fixed Price (in dollars per barrel) | 89 | ' |
Oil Swap 29 [Member] | Minimum [Member] | ' | ' |
Crude Oil Derivative Contracts Cash-flow Not Designated as Hedges [Abstract] | ' | ' |
Settlement Period | 1-Jan-15 | ' |
Oil Swap 29 [Member] | Maximum [Member] | ' | ' |
Crude Oil Derivative Contracts Cash-flow Not Designated as Hedges [Abstract] | ' | ' |
Settlement Period | 31-Dec-15 | ' |
Oil Swap 28 [Member] | ' | ' |
Crude Oil Derivative Contracts Cash-flow Not Designated as Hedges [Abstract] | ' | ' |
Oil (in barrels) | 360,000 | ' |
Fixed Price (in dollars per barrel) | 89.02 | ' |
Oil Swap 28 [Member] | Minimum [Member] | ' | ' |
Crude Oil Derivative Contracts Cash-flow Not Designated as Hedges [Abstract] | ' | ' |
Settlement Period | 1-Jan-15 | ' |
Oil Swap 28 [Member] | Maximum [Member] | ' | ' |
Crude Oil Derivative Contracts Cash-flow Not Designated as Hedges [Abstract] | ' | ' |
Settlement Period | 31-Dec-15 | ' |
Oil Swap 30 [Member] | ' | ' |
Crude Oil Derivative Contracts Cash-flow Not Designated as Hedges [Abstract] | ' | ' |
Oil (in barrels) | 180,000 | ' |
Fixed Price (in dollars per barrel) | 89 | ' |
Oil Swap 30 [Member] | Minimum [Member] | ' | ' |
Crude Oil Derivative Contracts Cash-flow Not Designated as Hedges [Abstract] | ' | ' |
Settlement Period | 1-Jan-15 | ' |
Oil Swap 30 [Member] | Maximum [Member] | ' | ' |
Crude Oil Derivative Contracts Cash-flow Not Designated as Hedges [Abstract] | ' | ' |
Settlement Period | 31-Dec-15 | ' |
Open Commodity Swap 1 [Member] | ' | ' |
Crude Oil Derivative Contracts Cash-flow Not Designated as Hedges [Abstract] | ' | ' |
Total volumes of open contracts | 2,850,000 | ' |
Weighted average price on open contracts | $90.24 | ' |
Open Commodity Swap 1 [Member] | Maximum [Member] | ' | ' |
Crude Oil Derivative Contracts Cash-flow Not Designated as Hedges [Abstract] | ' | ' |
Settlement Period | 31-Dec-14 | ' |
Open Commodity Swap 2 [Member] | ' | ' |
Crude Oil Derivative Contracts Cash-flow Not Designated as Hedges [Abstract] | ' | ' |
Total volumes of open contracts | 2,880,000 | ' |
Weighted average price on open contracts | $89.02 | ' |
Open Commodity Swap 2 [Member] | Maximum [Member] | ' | ' |
Crude Oil Derivative Contracts Cash-flow Not Designated as Hedges [Abstract] | ' | ' |
Settlement Period | 31-Dec-15 | ' |
Collar 1 [Member] | ' | ' |
Crude Oil Derivative Contracts Cash-flow Not Designated as Hedges [Abstract] | ' | ' |
Settlement Period | 1-Apr-14 | ' |
Oil (in barrels) | 180,000 | ' |
Price minimum (in dollars per barrel) | $90 | ' |
Price maximum (in dollars per barrel) | $99.05 | ' |
Collar 1 [Member] | Maximum [Member] | ' | ' |
Crude Oil Derivative Contracts Cash-flow Not Designated as Hedges [Abstract] | ' | ' |
Settlement Period | 31-Dec-14 | ' |
Not Designated as Hedging Instrument [Member] | ' | ' |
Crude Oil Derivative Contracts Cash-flow Not Designated as Hedges [Abstract] | ' | ' |
Realized gain (loss) on price risk derivatives not designated as hedges | ($6,817,980) | ($371,283) |
Unrealized gain (loss) on price risk derivatives not designated as hedges | ($7,859,683) | ($14,910,655) |