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Oil and Gas Producing Activities | 12 Months Ended
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Dec. 31, 2016
Oil And Gas Exploration And Production Industries Disclosures [Abstract] |
Oil and Gas Producing Activities | (3) Oil and Gas Producing Activities Set forth below is certain information regarding the aggregate capitalized costs of oil and gas properties and costs incurred by the Company for its oil and gas property acquisition, development and exploration activities: Capitalized Costs
|  | As of December 31, |
|  | 2015 |  |  | 2016 |
|  | (In thousands) |
Unproved properties |  | $ | 84,144 |  |  | $ | — |
Proved properties: |  |  |  |  |  |  |  |
Leasehold costs |  |  | 982,915 |  |  |  | 662,022 |
Wells and related equipment and facilities |  |  | 3,349,307 |  |  |  | 3,135,079 |
Accumulated depreciation depletion and amortization |  |  | (3,389,786 | ) |  |  | (3,009,236 | )
|  | $ | 1,026,580 |  |  | $ | 787,865 |
Costs Incurred
|  | For the Years Ended December 31, |
|  | 2014 |  |  | 2015 |  |  | 2016 |
|  | (In thousands) |
Property Acquisitions: |  |  |  |  |  |  |  |  |  |  |  |
Unproved property acquisitions |  | $ | 91,960 |  |  | $ | 12,972 |  |  | $ | — |
Proved property acquisitions |  |  | 2,400 |  |  |  | — |  |  |  | — |
Development costs |  |  | 440,848 |  |  |  | 221,265 |  |  |  | 58,587 |
Exploration costs |  |  | 52,080 |  |  |  | 12,265 |  |  |  | — |
|  | $ | 587,288 |  |  | $ | 246,502 |  |  | $ | 58,587 |

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- Definition The entire disclosure for oil and gas producing industries. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=68064819&loc=d3e61555-109447 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=68064819&loc=d3e61526-109447 + Details
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