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Acquisitions and Divestitures (Details) (USD $) | 9 Months Ended |  | 0 Months Ended |  | 0 Months Ended | 3 Months Ended |
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Sep. 30, 2014 | Sep. 30, 2013 | Jan. 21, 2014 acre | May 07, 2014 Farm in Acreage [Member] Wells | May 07, 2014 South Texas Based Oil and Gas Company [Member] | May 07, 2014 Dimmit County [Member] acre | May 07, 2014 Dimmit County [Member] Primary Leasehold Acreage [Member] acre | May 07, 2014 Dimmit County [Member] Farm in Acreage [Member] acre | May 07, 2014 Farmor [Member] Wells | Jun. 30, 2014 Williams and McKenzie Counties [Member] | May 27, 2014 Williams and McKenzie Counties [Member] acre
Acquisitions and Divestitures [Line Items] |  |  |  |  |  |  |  |  |  |  |
Percentage interest acquired (in hundredths) |  |  | 50.00% |  | 33.00% |  |  |  |  |  |
Gross acres acquired in acquisition (in acres) |  |  | 160 |  |  | 12,100 | 4,020 | 8,080 |  |  | 16
Net acres acquired in acquisition (in acres) |  |  |  |  |  | 3,384 | 1,181 | 2,203 |  |  | 0.62
Initial well commitment |  |  |  | 2 |  |  |  |  |  |  |
Number of developed wells in which our original working interest is retained |  |  |  |  |  |  |  |  | 10 |  |
Minimum percentage of net revenue interest in lease owned (in hundredths) |  |  |  | 12.50% |  |  |  |  |  |  |
Percentage payout of all costs (in hundredths) |  |  |  |  | 100.00% |  |  |  |  |  |
Percentage of working interest retained (in hundredths) |  |  |  |  |  |  |  |  | 25.00% |  |
Expected net revenue interests in new wells after sale |  |  |  |  | 115.00% |  |  |  |  |  |
Cost of acquisition |  |  |  |  | $ 3,900,000 |  |  |  |  |  |
Net proceeds on transaction |  |  |  |  |  |  |  |  |  | 12,200,000 |
Adjustment related to revenue |  |  |  |  |  |  |  |  |  | 681,000 |
Proceeds from sale of assets held for sale | $ 28,000 | $ 2,596,000 |  |  |  |  |  |  |  | $ 11,500,000 |
Net sales of acres (in acres) |  |  |  |  |  |  |  |  |  |  | 285.7

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