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Commitments and Contingencies (Details) $ in Thousands |  | 3 Months Ended | 6 Months Ended |
--- | --- | --- | --- | ---
Apr. 27, 2015 USD ($) | Jun. 30, 2015 a | Jun. 30, 2015 USD ($) a | Jun. 30, 2014 USD ($) | Jan. 21, 2014 a
Water Rights Litigation Mt. Emmons Project [Abstract] |  |  |  |  |
Period for proposal submission |  | 6 years |  |  |
Gas and Oil Acreage [Line Items] |  |  |  |  |
Gross acres acquired in acquisition (in acres) |  |  |  |  | 160
Working interest percentage (in hundredths) |  |  |  |  | 50.00%
Proceeds from Legal Settlements | $ |  |  | $ 1,500 | $ 0 |
Dimmit Wood Properties Ltd [Member] |  |  |  |  |
Gas and Oil Acreage [Line Items] |  |  |  |  |
Gross acres acquired in acquisition (in acres) |  | 800.77 | 800.77 |  |
Working interest percentage (in hundredths) |  | 30.00% | 30.00% |  |
Crimson and Liberty [Member] |  |  |  |  |
Gas and Oil Acreage [Line Items] |  |  |  |  |
Proceeds from Legal Settlements | $ | $ 1,500 |  |  |  |

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- Definition Area spaced or assigned to productive wells in which a working interest is owned. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K (SK) -Number 229 -Section 1208 -Paragraph (a) + Details
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- Definition Cash received for the settlement of litigation during the current period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3536-108585 + Details
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- Definition A percentage of ownership in an oil and gas lease granting its owner the right to explore, drill and produce oil and gas from a tract of property. Working interest owners are obligated to pay a corresponding percentage of the cost of leasing, drilling, producing and operating a well or unit. After royalties are paid, the working interest also entitles its owner to share in production revenues with other working interest owners, based on the percentage of working interest owned. + References No definition available. + Details
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