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PROPERTIES AND EQUIPMENT, NET (Details 3) (USD $) | 3 Months Ended | 6 Months Ended | 1 Months Ended
--- | --- | --- | ---
Jun. 30, 2013 | Jun. 30, 2012 | Jun. 30, 2013 | Jun. 30, 2012 | Jun. 30, 2012 Pearsall shale
Significant Acquisitions and Disposals |  |  |  |  |
Non-operated working interest (as a percent) |  |  |  |  | 35.00%
Total consideration received from the sale of properties |  |  |  |  | $ 251,000,000
Proceeds from sale of oil and gas properties |  |  |  |  | 125,000,000
Gain on sale of assets | 276,000 | 67,703,000 | 180,000 | 67,168,000 | 67,000,000
Percentage of fund for the Company's share of future drilling and completion costs |  |  |  |  | 85.00%
Future drilling and completion costs to be funded by third party |  |  |  |  | $ 126,000,000
Drilling and completion carry |  |  |  |  | 2 years

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