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Oil and Gas Properties Additional Details (Details) - USD ($) | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2015 | Jun. 30, 2015 | Sep. 30, 2015 | Dec. 31, 2014
Impairment of Oil and Gas Properties | $ 81,240,000 |  |  |
Impairment of Oil and Gas Properties | $ 15,858,000 |  | $ 36,768,000 |
Increase Decrease In Average Sales Price | 24.00% |  |  |
Impairment Charge on Reclassified Assets | $ 1,361,000 |  |  |
Impairment of Proved Oil and Gas Properties | 65,382,000 |  | 90,417,000 |
Results of Operations, Dry Hole Costs |  |  | 9,952,000 |
Gain (Loss) on Disposition of Proved Property |  |  | $ (1,320,000) |
Net Mineral Acres Leased From Others |  |  | 27662 |
Gross Producing Oil and Gas Wells Sold |  |  | 29 |
Net Producing Oil and Gas Wells Sold |  |  | 5 |
Proceeds from Sale of Oil and Gas Property and Equipment |  |  | $ 13,111,000 |
OKLAHOMA |  |  |  |
Results of Operations, Dry Hole Costs |  | $ 9,674,000 |  |
Capitalized Exploratory Well Cost, Charged to Expense |  |  | 917,000 |
Oil and Gas Properties [Member] |  |  |  |
Assets Held-for-sale, Long Lived, Fair Value Disclosure | 1,534,000 |  | 1,534,000 |
Oil and Gas Properties [Member] | Fair Value, Measurements, Nonrecurring [Member] |  |  |  |
Assets Held-for-sale, Long Lived, Fair Value Disclosure | 1,534,000 |  | 1,534,000 | $ 0
Oil and Gas Properties [Member] | Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |  |
Assets Held-for-sale, Long Lived, Fair Value Disclosure | $ 1,534,000 |  | $ 1,534,000 | $ 0

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- Definition Fair value portion of assets classified as held for sale. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19190-110258 + Details
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- Definition Capitalized exploratory well costs that were expensed during the year because proved reserves were not found at the exploratory well. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 1B -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=51678428&loc=SL6806780-109447 + Details
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- Definition The adjustment to reduce the value of existing agreements that specify the lessee's rights to use the leased property. This expense is charged when the estimates of future profits generated by the leased property are reduced. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=51824106&loc=d3e2420-110228 + Details
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- Definition The cash inflow to dispose of long-lived, physical assets and mineral interests in oil and gas properties used for normal oil and gas operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3179-108585 + Details
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