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Supplemental Oil and Gas Disclosures (Unaudited) (Details 2) | 12 Months Ended
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Dec. 31, 2013 MBbls | Dec. 31, 2012 MBbls | Dec. 31, 2011 MBbls
Oil [Member] |  |  |
Reserve Quantities [Line Items] |  |  |
Proved developed reserves | 0 | 0 | 95,000
Proved undeveloped reserves | 0 | 0 | 107,000
Total proved reserves at period end | 0 | 0 | 202,000
Proved Developed and Undeveloped Reserves [Abstract] |  |  |
Total proved reserves, beginning balance | 0 | 202,000 | 6,772,000
Revisions of previous estimates | 0 | (8,000) | (88,000)
Production | 0 | (23,000) | (612,000)
Extensions and discoveries | 0 | 0 | 0
Purchases of reserves in place | 0 | 0 | 0
Sales of reserves in place | 0 | (171,000) | (5,870,000)
Total proved reserves at period end | 0 | 0 | 202,000
Natural Gas Liquids [Member] |  |  |
Reserve Quantities [Line Items] |  |  |
Proved developed reserves | 0 | 0 | 40,000
Proved undeveloped reserves | 0 | 0 | 60,000
Total proved reserves at period end | 0 | 0 | 100,000
Proved Developed and Undeveloped Reserves [Abstract] |  |  |
Total proved reserves, beginning balance | 0 | 100,000 | 489,000
Revisions of previous estimates | 0 | 39,000 | 22,000
Production | 0 | (39,000) | (88,000)
Extensions and discoveries | 0 | 0 | 0
Purchases of reserves in place | 0 | 0 | 0
Sales of reserves in place | 0 | (100,000) | (323,000)
Total proved reserves at period end | 0 | 0 | 100,000
Natural Gas [Member] |  |  |
Reserve Quantities [Line Items] |  |  |
Proved developed reserves | 0 | 0 | 676,000
Proved undeveloped reserves | 0 | 0 | 480,000
Total proved reserves at period end | 0 | 0 | 1,156,000
Proved Developed and Undeveloped Reserves [Abstract] |  |  |
Total proved reserves, beginning balance | 0 | 1,156,000 | 25,585,000
Revisions of previous estimates | 0 | (52,000) | (1,903,000)
Production | 0 | (311,000) | (3,322,000)
Extensions and discoveries | 0 | 0 | 0
Purchases of reserves in place | 0 | 0 | 0
Sales of reserves in place | 0 | (793,000) | (19,204,000)
Total proved reserves at period end | 0 | 0 | 1,156,000

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- Definition Additions to proved reserves that result from (1) extension of the proved acreage of previously discovered (old) reservoirs through additional drilling in periods after discovery and (2) discovery of new fields with proved reserves or of new reservoirs of proved reserves in old fields. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 5 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=8451039&loc=d3e61831-109447 + Details
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- Definition The net quantity of proved reserves as of the balance sheet date. Proved oil reserves are the estimated quantities of crude oil and natural gas liquids which geological and engineering data demonstrate with reasonable certainty to be recoverable. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=8451039&loc=d3e61831-109447 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-10.(a)(2)) -URI http://asc.fasb.org/extlink&oid=27015464&loc=d3e511914-122862 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 10 -Paragraph a -Subparagraph 2 -Article 4 + Details
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- Definition Purchase of minerals in place. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 5 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=8451039&loc=d3e61831-109447 + Details
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- Definition Revisions represent changes in previous estimates of proved reserves, either upward or downward, resulting from new information (except for an increase in proved acreage) normally obtained from development drilling and production history or resulting from change in economic factors. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 5 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=8451039&loc=d3e61831-109447 + Details
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- Definition Net quantities of an enterprise's interests in proved developed reserves of either crude oil (including condensate and natural gas liquids), natural gas, synthetic oil and gas, or other nonrenewable natural resource that is intended to be upgraded into synthetic oil and gas as of the beginning and the end of the year. "Net" quantities of reserves include those relating to the enterprise's operating and nonoperating interests in properties. Quantities of reserves relating to royalty interests owned are included in "net" quantities if the necessary information is available to the enterprise. "Net" quantities does not include reserves relating to interests of others in properties owned by the enterprise. The unit of measure for reserve quantities is defined as "barrels" for oil and synthetic oil reserves or "cubic feet" or "cubic meters" for natural gas and synthetic gas reserves. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=8451039&loc=d3e61797-109447 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=8451039&loc=d3e61884-109447 + Details
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