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Oil and Gas Producing Activities (Tables) | 12 Months Ended
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Dec. 31, 2016
Oil And Gas Exploration And Production Industries Disclosures [Abstract] |
Capitalized Costs Related to Oil and Gas Property Acquisition Exploration and Development 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 Related to Oil and Gas Property Acquisition Exploration and Development Activities | 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 Tabular disclosure of aggregate capitalized costs relating to an enterprise's oil and gas producing activities and the aggregate related accumulated depreciation, depletion, amortization, and valuation allowances. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=68064819&loc=d3e61901-109447 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 55 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=34713648&loc=d3e63019-109448 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=68064819&loc=d3e61929-109447 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 14 -URI http://asc.fasb.org/extlink&oid=68064819&loc=d3e61926-109447 + Details
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- Definition Tabular disclosure of the aggregate of costs (whether the costs are capitalized or charged to expense at the time they are incurred ) incurred for the year in oil and gas property acquisition, exploration and development activities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 55 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=34713648&loc=d3e63042-109448 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=68064819&loc=d3e62059-109447 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 19 -URI http://asc.fasb.org/extlink&oid=68064819&loc=d3e62038-109447 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=68064819&loc=d3e62014-109447 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=6392692&loc=d3e7535-110849 + Details
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