Annual report pursuant to section 13 and 15(d)

NOTE 10. SUPPLEMENTAL INFORMATION RELATING TO OIL AND GAS PRODUCING ACTIVITIES (UNAUDITED) (Detail)

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NOTE 10. SUPPLEMENTAL INFORMATION RELATING TO OIL AND GAS PRODUCING ACTIVITIES (UNAUDITED) (Detail)
12 Months Ended
Dec. 31, 2012
Anticipated Timing of Inclusion of Costs in Amortization Calculation five years
Fair Value Inputs, Discount Rate 10.00%