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Business Segment Information (Tables) | 12 Months Ended
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Dec. 31, 2013
Segment Reporting [Abstract] |
Summarized Financial Information of Segments | Management evaluates the performance of the Company’s business segments based on operating income, which is defined as segment operating revenues less operating expenses, including depreciation, depletion and amortization. Summarized financial information for the Company’s three business segments is shown in the following table:
| Exploration and Production |  | Well Services |  | Midstream Services |  | Consolidated
| (In thousands)
Year Ended December 31, 2013 |
Revenues | $ | 1,084,412 |  |  | $ | 180,686 |  |  | $ | 29,230 |  |  | $ | 1,294,328 |
Inter-segment revenues | — |  |  | (128,841 | ) |  | (23,488 | ) |  | (152,329 | )
Total revenues | 1,084,412 |  |  | 51,845 |  |  | 5,742 |  |  | 1,141,999 |
Operating income | 486,697 |  |  | 14,305 |  |  | 3,396 |  |  | 504,398 |
Other income (expense) | (141,397 | ) |  | 16 |  |  | — |  |  | (141,381 | )
Income before income taxes | 345,300 |  |  | 14,321 |  |  | 3,396 |  |  | 363,017 |
Total assets(1) | 4,532,264 |  |  | 70,708 |  |  | 108,952 |  |  | 4,711,924 |
Capital expenditures(2) | 2,472,126 |  |  | 15,217 |  |  | 18,955 |  |  | 2,506,298 |
Depreciation, depletion and amortization | 304,389 |  |  | 2,091 |  |  | 575 |  |  | 307,055 |
Year Ended December 31, 2012 |
Revenues | $ | 670,491 |  |  | $ | 82,481 |  |  | $ | — |  |  | $ | 752,972 |
Inter-segment revenues | — |  |  | (66,304 | ) |  | — |  |  | (66,304 | )
Total revenues | 670,491 |  |  | 16,177 |  |  | — |  |  | 686,668 |
Operating income | 276,740 |  |  | 253 |  |  | — |  |  | 276,993 |
Other income (expense) | (31,120 | ) |  | 1 |  |  | — |  |  | (31,119 | )
Income before income taxes | 245,620 |  |  | 254 |  |  | — |  |  | 245,874 |
Total assets | 2,475,820 |  |  | 52,974 |  |  | — |  |  | 2,528,794 |
Capital expenditures(2) | 1,132,894 |  |  | 15,679 |  |  | — |  |  | 1,148,573 |
Depreciation, depletion and amortization | 206,127 |  |  | 607 |  |  | — |  |  | 206,734 |
(1) | Total assets for the exploration and production segment includes $137.1 million of assets held for sale as of December 31, 2013.
(2) | Capital expenditures reflected in the table above differ from the amounts shown in the Consolidated Statement of Cash Flows because amounts reflected in the table include changes in accrued liabilities from the previous reporting period for capital expenditures, while the amounts presented in the Consolidated Statement of Cash Flows are presented on a cash 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 21 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8721-108599 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 Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8906-108599 Reference 5: 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 + Details
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