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Divestitures (Details) (USD $) | 12 Months Ended |  | 1 Months Ended | 12 Months Ended | 1 Months Ended | 12 Months Ended | 1 Months Ended
--- | --- | --- | --- | --- | --- | --- | ---
Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011 | Nov. 30, 2013 | Jun. 30, 2012 Pearsall shale | May 31, 2011 Haynesville/Bossier Shale Joint Ventures | Dec. 31, 2011 Haynesville/Bossier Shale Joint Ventures item | Oct. 31, 2011 Colorado, Utah and Wyoming properties | Dec. 31, 2013 Other properties | Dec. 31, 2012 Other properties | Dec. 31, 2011 Other properties | Dec. 31, 2012 Texas oil and gas properties | Dec. 31, 2013 Oklahoma and Texas panhandles oil and gas properties | Dec. 31, 2013 Oklahoma, Texas and Kansas
Significant Acquisitions and Disposals |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net Gain (loss) on sale of assets | $ 21,351,000 | $ 50,635,000 | $ 63,382,000 |  | $ 67,000,000 | $ 34,200,000 |  | $ 4,200,000 | $ 19,500,000 | $ 1,800,000 | $ 25,000,000 | $ (18,200,000) | $ 19,400,000 | $ (17,500,000)
Proceeds from sale of oil and gas properties before closing adjustments |  |  |  |  |  |  |  | 285,000,000 |  |  |  | 29,900,000 | 160,000,000 | 123,400,000
Proceeds from sale of oil and gas properties deposited |  |  |  | 28,300,000 |  |  |  |  |  |  |  |  |  |
Non-operated working interest (as a percent) |  |  |  |  | 35.00% |  |  |  |  |  |  |  |  |
Total consideration received from the sale of properties |  |  |  |  | 251,000,000 |  |  |  |  | 14,400,000 |  |  |  |
Proceeds from sale of oil and gas properties |  |  |  |  | 125,000,000 | 47,000,000 |  |  | 44,300,000 |  | 73,500,000 |  |  |
Percentage of fund for the Company's share of future drilling and completion costs |  |  |  |  | 85.00% |  |  |  |  |  |  |  |  |
Future drilling and completion costs to be funded by third party |  |  |  |  | 125,000,000 |  |  |  |  |  |  |  |  |
Participation agreements |  |  |  |  |  |  | 2 |  |  |  |  |  |  |
Third party reimbursement percentage of drilling costs |  |  |  |  |  |  | 100.00% |  |  |  |  |  |  |
Third party percentage of working interest in leaseholds |  |  |  |  |  |  | 75.00% |  |  |  |  |  |  |
Reimbursement of drilling costs by third parties |  |  |  |  |  |  | $ 12,900,000 |  |  |  |  |  |  |

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- Definition Represents the amount of deposits made from proceeds received from the sale of oil and gas properties with a qualified intermediary to facilitate potential like-kind exchange transactions pursuant to Section 1031 of the Internal Revenue Code. + References No definition available. + Details
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- Definition Represents the amount certain to be funded for future drilling and completion costs by Osaka Gas Co., Ltd., associated with leaseholds. + References No definition available. + Details
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