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Decommissioning and Other Asset Retirement Obligations (Details) (USD $) | 12 Months Ended
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Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Decommissioning and Other Asset Retirement Obligations Detail [Table] |  |  |
Beginning balance for the period, as reported | $ 94,921,000 | $ 139,835,000 |
Activity in the period: |  |  |
Accretion of liability | 673,000 | 1,536,000 |
Retirement obligations incurred | 0 | 0 |
Revisions in estimated cash flows | 74,946,000 | 40,986,000 |
Settlement of retirement obligations | (119,636,000) | (87,436,000) |
Ending balance at December 31 | 50,904,000 | 94,921,000 | 139,835,000
Change in estimated cash flows to decommission oil and gas properties | 75,000,000 | 41.0 |
Direct charges to operating expense for increased estimated cash flows | 75,312,000 | 40,767,000 | 78,382,000
Aggregate amount of asset retirement obligations assumed by buyers of oil and gas properties | 5,300,000 |  |
Estimated future hurricane repair expenses | 7,700,000 |  |
Asset retirement obligations associated with non-operated properties | $ 7,600,000 | $ 7,500,000 |

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- Definition The carrying amount of a liability for an asset retirement obligation. An asset retirement obligation is a legal obligation associated with the disposal or retirement of a tangible long-lived asset that results from the acquisition, construction or development, or the normal operations of a long-lived asset, except for certain obligations of lessees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6392692&loc=d3e7535-110849 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Asset Retirement Obligation -URI http://asc.fasb.org/extlink&oid=6505190 + Details
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- Definition Amount of accretion expense recognized during the period that is associated with an asset retirement obligation. Accretion expense measures and incorporates changes due to the passage of time into the carrying amount of the liability. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6392676&loc=d3e7480-110848 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c)(3) -URI http://asc.fasb.org/extlink&oid=6392692&loc=d3e7535-110849 + Details
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- Definition Amount of the Increase or Decrease in the amount of the asset retirement obligation during the current period for changes in the amount or timing of the estimated cash flows associated with the settlement of the obligation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c)(4) -URI http://asc.fasb.org/extlink&oid=6392692&loc=d3e7535-110849 + Details
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