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Commitments and Contingencies (Contingencies) (Details) (USD $) | 0 Months Ended | 36 Months Ended |  | 1 Months Ended | 0 Months Ended | 4 Months Ended |  | 0 Months Ended
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Apr. 20, 2009 Louisiana Department of Revenue Tax Litigation [Member] | Dec. 31, 2007 Louisiana Department of Revenue Tax Litigation [Member] | Dec. 31, 2010 Louisiana Department of Revenue Tax Litigation [Member] lawsuit | Nov. 30, 2006 Cudd Pressure Control Litigation [Member] defendant | Dec. 09, 2010 Reed Litigation [Member] plaintiff defendant acre | Jul. 31, 2010 Reed Litigation [Member] defendant | Jul. 31, 2010 Reed Litigation [Member] plaintiff | Dec. 07, 2010 Reed Litigation [Member] defendant acre | Dec. 06, 2010 Reed Litigation [Member] acre | Jul. 31, 2010 Individual Counterparty [Member] Reed Litigation [Member] plaintiff | Jul. 31, 2010 Limited Liability Company [Member] Reed Litigation [Member] plaintiff
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Alleged severance tax |  | $ 1,800,000 |  |  |  |  |  |  |  |  |
Lawsuits filed value | $ 2,275,729 |  |  |  |  |  |  |  |  |  |
Number of pending claims |  |  | 2 |  |  |  |  |  |  |  |
Number of defendants |  |  |  | 6 | 6 | 15 | 15 | 21 |  |  |
Number of plaintiffs |  |  |  |  | 4 |  |  |  |  | 6 | 1
Original number of acreage in litigation |  |  |  |  |  |  |  |  | 240 |  |
Amended number of acreage in litigation |  |  |  |  |  |  |  | 1,700 |  |  |

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- Definition The value (monetary amount) of the award the plaintiff seeks in the legal matter. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6952336&loc=d3e14326-108349 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 5 -Paragraph 9 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 5 -Paragraph 10 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6952336&loc=d3e14435-108349 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 9 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6952336&loc=d3e14557-108349 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 5 -Paragraph 11 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 5 -Paragraph 12 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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