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COMMODITY PRICE RISK MANAGEMENT (Details) (USD $) | 12 Months Ended
--- | ---
Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Derivatives, Fair Value [Line Items] |  |  |
Recognized gain from the contract settlements of derivatives | $ 21,000 | $ (1,974,000) | $ (156,000)
Unrealized gain on risk management activities | 1,100,000 |  |
Current Asset [Member] | Crude Oil Costless Collars [Member] |  |  |
Derivatives, Fair Value [Line Items] |  |  |
Derivative Assets, Fair Value | 472,000 | 3,000 |
Current Liability [Member] | Crude Oil Costless Collars [Member] |  |  |
Derivatives, Fair Value [Line Items] |  |  |
Derivative Liabilities, Fair Value | $ 0 | $ 601,000 |
Crude Oil Costless Collar 10/01/12 - 03/31/13 [Member] |  |  |
Derivative [Line Items] |  |  |
Counterparty | Wells Fargo |  |
Basis | WTI |  |
Quantity (barrels per day) | 200 |  |
Crude Oil Costless Collar 10/01/12 - 03/31/13 [Member] | Put Option [Member] |  |  |
Derivative [Line Items] |  |  |
Strike Price (in dollars per barrel) | 85.00 |  |
Crude Oil Costless Collar 10/01/12 - 03/31/13 [Member] | Call Option [Member] |  |  |
Derivative [Line Items] |  |  |
Strike Price (in dollars per barrel) | 101.00 |  |
Crude Oil Costless Collar 01/01/13 - 06/30/13 [Member] |  |  |
Derivative [Line Items] |  |  |
Counterparty | Wells Fargo |  |
Basis | WTI |  |
Quantity (barrels per day) | 200 |  |
Crude Oil Costless Collar 01/01/13 - 06/30/13 [Member] | Put Option [Member] |  |  |
Derivative [Line Items] |  |  |
Strike Price (in dollars per barrel) | 90.00 |  |
Crude Oil Costless Collar 01/01/13 - 06/30/13 [Member] | Call Option [Member] |  |  |
Derivative [Line Items] |  |  |
Strike Price (in dollars per barrel) | 105.75 |  |
Crude Oil Costless Collar 10/01/12 - 09/30/13 [Member] |  |  |
Derivative [Line Items] |  |  |
Counterparty | BNP Parabis |  |
Basis | WTI |  |
Quantity (barrels per day) | 200 |  |
Crude Oil Costless Collar 10/01/12 - 09/30/13 [Member] | Put Option [Member] |  |  |
Derivative [Line Items] |  |  |
Strike Price (in dollars per barrel) | 95.00 |  |
Crude Oil Costless Collar 10/01/12 - 09/30/13 [Member] | Call Option [Member] |  |  |
Derivative [Line Items] |  |  |
Strike Price (in dollars per barrel) | 116.60 |  |
Crude Oil Costless Collar 04/01/13 - 06/30/13 [Member] |  |  |
Derivative [Line Items] |  |  |
Counterparty | Wells Fargo |  |
Basis | WTI |  |
Quantity (barrels per day) | 200 |  |
Crude Oil Costless Collar 04/01/13 - 06/30/13 [Member] | Put Option [Member] |  |  |
Derivative [Line Items] |  |  |
Strike Price (in dollars per barrel) | 90.00 |  |
Crude Oil Costless Collar 04/01/13 - 06/30/13 [Member] | Call Option [Member] |  |  |
Derivative [Line Items] |  |  |
Strike Price (in dollars per barrel) | 97.50 |  |
Crude Oil Costless Collar 07/01/13 - 09/30/13 [Member] |  |  |
Derivative [Line Items] |  |  |
Counterparty | Wells Fargo |  |
Basis | WTI |  |
Quantity (barrels per day) | 400 |  |
Crude Oil Costless Collar 07/01/13 - 09/30/13 [Member] | Put Option [Member] |  |  |
Derivative [Line Items] |  |  |
Strike Price (in dollars per barrel) | 90.00 |  |
Crude Oil Costless Collar 07/01/13 - 09/30/13 [Member] | Call Option [Member] |  |  |
Derivative [Line Items] |  |  |
Strike Price (in dollars per barrel) | 97.50 |  |
Crude Oil Costless Collar 10/01/13 - 12/31/13 [Member] |  |  |
Derivative [Line Items] |  |  |
Counterparty | Wells Fargo |  |
Basis | WTI |  |
Quantity (barrels per day) | 600 |  |
Crude Oil Costless Collar 10/01/13 - 12/31/13 [Member] | Put Option [Member] |  |  |
Derivative [Line Items] |  |  |
Strike Price (in dollars per barrel) | 90.00 |  |
Crude Oil Costless Collar 10/01/13 - 12/31/13 [Member] | Call Option [Member] |  |  |
Derivative [Line Items] |  |  |
Strike Price (in dollars per barrel) | 97.50 |  |

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- Definition Reference to the index or unit of measurement for the underlying which establishes the pricing terms of the derivative instrument. For example, the basis on the underlying for a natural gas futures contract might be the NYMEX price per million British thermal units (MMBtu). + References No definition available. + Details
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