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Business Segment Information (Tables) | 3 Months Ended
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Mar. 31, 2013
Segment Reporting [Abstract] |
Summarized Financial Information Concerning Segments | Summarized financial information concerning the Company’s segments is shown in the following table (in thousands):
| Exploration and Production |  | Drilling and Oil Field Services |  | Midstream Services |  | All Other |  | Consolidated Total
Three Months Ended March 31, 2013 |  |  |  |  |  |  |  |  |
Revenues | $ | 481,410 |  |  | $ | 49,737 |  |  | $ | 36,834 |  |  | $ | 853 |  |  | $ | 568,834 |
Inter-segment revenue | (81 | ) |  | (32,367 | ) |  | (24,696 | ) |  | — |  |  | (57,144 | )
Total revenues | $ | 481,329 |  |  | $ | 17,370 |  |  | $ | 12,138 |  |  | $ | 853 |  |  | $ | 511,690 |
Loss from operations(1) | $ | (301,707 | ) |  | $ | (8,965 | ) |  | $ | (2,459 | ) |  | $ | (46,395 | ) |  | $ | (359,526 | )
Interest income (expense), net | 318 |  |  | — |  |  | (125 | ) |  | (86,103 | ) |  | (85,910 | )
Loss on extinguishment of debt | — |  |  | — |  |  | — |  |  | (82,005 | ) |  | (82,005 | )
Other income (expense), net | 628 |  |  | — |  |  | (800 | ) |  | 783 |  |  | 611 |
Loss before income taxes | $ | (300,761 | ) |  | $ | (8,965 | ) |  | $ | (3,384 | ) |  | $ | (213,720 | ) |  | $ | (526,830 | )
Capital expenditures(2) | $ | 357,591 |  |  | $ | 632 |  |  | $ | 15,221 |  |  | $ | 15,268 |  |  | $ | 388,712 |
Depreciation, depletion, amortization and accretion | $ | 167,513 |  |  | $ | 8,814 |  |  | $ | 1,687 |  |  | $ | 4,627 |  |  | $ | 182,641 |
At March 31, 2013 |  |  |  |  |  |  |  |  |
Total assets | $ | 5,647,302 |  |  | $ | 192,087 |  |  | $ | 159,843 |  |  | $ | 1,679,079 |  |  | $ | 7,678,311 |
Three Months Ended March 31, 2012 |  |  |  |  |  |  |  |  |
Revenues | $ | 343,120 |  |  | $ | 98,332 |  |  | $ | 26,162 |  |  | $ | 1,416 |  |  | $ | 469,030 |
Inter-segment revenue | (77 | ) |  | (69,023 | ) |  | (18,295 | ) |  | — |  |  | (87,395 | )
Total revenues | $ | 343,043 |  |  | $ | 29,309 |  |  | $ | 7,867 |  |  | $ | 1,416 |  |  | $ | 381,635 |
(Loss) income from operations(1) | $ | (123,836 | ) |  | $ | 3,479 |  |  | $ | (2,727 | ) |  | $ | (28,572 | ) |  | $ | (151,656 | )
Interest income (expense), net | 143 |  |  | — |  |  | (156 | ) |  | (66,952 | ) |  | (66,965 | )
Other income, net | 1,768 |  |  | — |  |  | — |  |  | 700 |  |  | 2,468 |
(Loss) income before income taxes | $ | (121,925 | ) |  | $ | 3,479 |  |  | $ | (2,883 | ) |  | $ | (94,824 | ) |  | $ | (216,153 | )
Capital expenditures(2) | $ | 491,905 |  |  | $ | 7,916 |  |  | $ | 23,975 |  |  | $ | 45,862 |  |  | $ | 569,658 |
Depreciation, depletion, amortization and accretion | $ | 90,052 |  |  | $ | 8,550 |  |  | $ | 1,411 |  |  | $ | 4,173 |  |  | $ | 104,186 |
At December 31, 2012 |  |  |  |  |  |  |  |  |
Total assets | $ | 8,681,056 |  |  | $ | 199,523 |  |  | $ | 151,492 |  |  | $ | 758,660 |  |  | $ | 9,790,731 |
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(1) | Exploration and production segment income from operations includes unrealized losses of $24.8 million and $129.2 million on commodity derivative contracts for the three-month periods ended March 31, 2013 and 2012, respectively. Exploration and production segment also includes a loss on the sale of the Permian Properties of $399.1 million for the three-month period ended March 31, 2013.
(2) | On an accrual basis.

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- Definition Tabular disclosure of the profit or loss and total assets for each reportable segment. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8736-108599 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 25 -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8813-108599 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=14024403&loc=d3e13816-109267 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 131 -Paragraph 27, 28 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8906-108599 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8721-108599 + Details
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