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Properties and Equipment, Net | 3 Months Ended
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Mar. 31, 2018
Property, Plant and Equipment [Abstract] |
Properties and Equipment, Net | Properties and Equipment, Net Properties and equipment, net are comprised of the following:
(In thousands) |  | March 31, 2018 |  | December 31, 2017
Proved oil and gas properties |  | $ | 5,082,995 |  |  | $ | 4,932,512 |
Unproved oil and gas properties |  | 194,003 |  |  | 190,474 |
Gathering and pipeline systems |  | 1,569 |  |  | 1,569 |
Land, building and other equipment |  | 81,957 |  |  | 82,670 |
|  | 5,360,524 |  |  | 5,207,225 |
Accumulated depreciation, depletion and amortization |  | (2,214,272 | ) |  | (2,135,021 | )
|  | $ | 3,146,252 |  |  | $ | 3,072,204 |
At March 31, 2018, the Company did not have any projects that had exploratory well costs capitalized for a period of greater than one year after drilling. Divestitures In February 2018, the Company sold its operated and non-operated Eagle Ford Shale assets for $765.0 million. During the fourth quarter of 2017, the Company classified these assets as held for sale and recorded an impairment charge of $414.3 million associated with the proposed sale of these properties. Upon closing the sale in the first quarter of 2018, the Company recognized a loss on sale of oil and gas properties of $44.8 million.

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- Definition The entire disclosure for long-lived, physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, accounting policies and methodology, roll forwards, depreciation, depletion and amortization expense, including composite depreciation, accumulated depreciation, depletion and amortization expense, useful lives and method used, income statement disclosures, assets held for sale and public utility disclosures. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -URI http://asc.fasb.org/topic&trid=2155823 + Details
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