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CONSOLIDATED BALANCE SHEETS Parenthetical - USD ($) $ in Thousands | Dec. 31, 2015 | Dec. 31, 2014
--- | --- | ---
Oil and Gas Property, Successful Effort Method, Accumulated Depreciation, Depletion and Amortization | $ 3,481,836 | $ 3,233,012
Property, Plant and Equipment, Other, Accumulated Depreciation | $ 32,956 | $ 37,079
Common Stock, Par Value Per Share | $ 0.01 | $ 0.01
Common Stock, Shares Authorized | 200,000,000 | 200,000,000
Common Stock, Shares, Issued | 68,075,700 | 67,463,060
Common Stock, Shares, Outstanding | 68,075,700 | 67,463,060
Assets Held-for-sale [Member] |  |
Oil and Gas Property, Successful Effort Method, Accumulated Depreciation, Depletion and Amortization | $ 0 | $ 22,482

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- Definition Amount of accumulated depreciation, depletion and amortization of oil and gas property carried under the successful effort method. Oil and gas property include, but not limited to, the entity's wells and related equipment and facilities. + 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=51678428&loc=d3e61901-109447 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-10.(b)) -URI http://asc.fasb.org/extlink&oid=50486907&loc=d3e511914-122862 + Details
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