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Properties and Equipment, Net | 6 Months Ended
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Jun. 30, 2016
Property, Plant and Equipment [Abstract] |
Properties and Equipment, Net | Properties and Equipment, Net Properties and equipment, net are comprised of the following:
(In thousands) |  | June 30, 2016 |  | December 31, 2015
Proved oil and gas properties |  | $ | 7,543,345 |  |  | $ | 8,821,146 |
Unproved oil and gas properties |  | 325,857 |  |  | 390,434 |
Gathering and pipeline systems |  | 191,848 |  |  | 243,672 |
Land, building and other equipment |  | 80,397 |  |  | 117,848 |
|  | 8,141,447 |  |  | 9,573,100 |
Accumulated depreciation, depletion and amortization |  | (3,378,767 | ) |  | (4,596,221 | )
|  | $ | 4,762,680 |  |  | $ | 4,976,879 |
At June 30, 2016, the Company did not have any projects that had exploratory well costs capitalized for a period of greater than one year after drilling. In February 2016, the Company completed the divestiture of certain proved and unproved oil and gas properties in east Texas for approximately $56.4 million and recognized a $0.5 million gain on sale of assets. The purchase price included a $6.3 million deposit that was received in the fourth quarter of 2015.

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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 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.13-14) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=64827811&loc=d3e1361-107760 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=64862545&loc=d3e2921-110230 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 + Details
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