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Business Segment Information (Tables) | 12 Months Ended
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Dec. 31, 2017
Segment Reporting [Abstract] |
Summarized Financial Information of Segments | The following table summarizes financial information for the Company’s three business segments for the periods presented:
| Exploration and Production |  | Midstream Services |  | Well Services |  | Eliminations |  | Consolidated
| (In thousands)
Year Ended December 31, 2017 |
Revenues from external customers | $ | 1,122,881 |  |  | $ | 72,752 |  |  | $ | 52,791 |  |  | $ | — |  |  | $ | 1,248,424 |
Inter-segment revenues | — |  |  | 113,047 |  |  | 95,345 |  |  | (208,392 | ) |  | — |
Total revenues | 1,122,881 |  |  | 185,799 |  |  | 148,136 |  |  | (208,392 | ) |  | 1,248,424 |
Operating income | 40,694 |  |  | 102,377 |  |  | 15,057 |  |  | (14,160 | ) |  | 143,968 |
Other income (expense) | (219,823 | ) |  | (37 | ) |  | 34 |  |  | — |  |  | (219,826 | )
Income (loss) before income taxes including non-controlling interests | $ | (179,129 | ) |  | $ | 102,340 |  |  | $ | 15,091 |  |  | $ | (14,160 | ) |  | $ | (75,858 | )
Total assets(1) | $ | 6,050,255 |  |  | $ | 663,614 |  |  | $ | 52,800 |  |  | $ | (151,539 | ) |  | $ | 6,615,130 |
Property, plant and equipment, net | 5,663,323 |  |  | 649,923 |  |  | 46,779 |  |  | (186,539 | ) |  | 6,173,486 |
Capital expenditures(2) | 602,734 |  |  | 235,090 |  |  | 12,537 |  |  | (14,157 | ) |  | 836,204 |
Depreciation, depletion and amortization | 519,853 |  |  | 15,999 |  |  | 12,939 |  |  | (17,989 | ) |  | 530,802 |
Impairment | 6,887 |  |  | — |  |  | — |  |  | — |  |  | 6,887 |
Year Ended December 31, 2016 |
Revenues from external customers | $ | 635,505 |  |  | $ | 35,406 |  |  | $ | 33,754 |  |  | $ | — |  |  | $ | 704,665 |
Inter-segment revenues | — |  |  | 85,447 |  |  | 59,595 |  |  | (145,042 | ) |  | — |
Total revenues | 635,505 |  |  | 120,853 |  |  | 93,349 |  |  | (145,042 | ) |  | 704,665 |
Operating income (loss) | (196,179 | ) |  | 68,868 |  |  | 3,428 |  |  | (6,950 | ) |  | (130,833 | )
Other income (expense) | (240,290 | ) |  | (474 | ) |  | 43 |  |  | — |  |  | (240,721 | )
Income (loss) before income taxes | $ | (436,469 | ) |  | $ | 68,394 |  |  | $ | 3,471 |  |  | $ | (6,950 | ) |  | $ | (371,554 | )
Total assets(1) | $ | 5,868,747 |  |  | $ | 431,095 |  |  | $ | 51,167 |  |  | $ | (172,377 | ) |  | $ | 6,178,632 |
Property, plant and equipment, net | 5,620,558 |  |  | 424,197 |  |  | 47,189 |  |  | (172,377 | ) |  | 5,919,567 |
Capital expenditures(2) | 1,017,411 |  |  | 170,386 |  |  | 680 |  |  | (6,950 | ) |  | 1,181,527 |
Depreciation, depletion and amortization | 467,894 |  |  | 8,525 |  |  | 14,892 |  |  | (14,980 | ) |  | 476,331 |
Impairment | 2,253 |  |  | 2,431 |  |  | — |  |  | — |  |  | 4,684 |
Year Ended December 31, 2015 |  |  |  |  |  |  |  |  |
Revenues from external customers | $ | 721,672 |  |  | $ | 23,769 |  |  | $ | 44,294 |  |  | $ | — |  |  | $ | 789,735 |
Inter-segment revenues | — |  |  | 80,926 |  |  | 177,184 |  |  | (258,110 | ) |  | — |
Total revenues | 721,672 |  |  | 104,695 |  |  | 221,478 |  |  | (258,110 | ) |  | 789,735 |
Operating income (loss) | (177,512 | ) |  | 60,668 |  |  | 49,145 |  |  | (46,465 | ) |  | (114,164 | )
Other income (expense) | 58,542 |  |  | (801 | ) |  | 52 |  |  | — |  |  | 57,793 |
Income (loss) before income taxes | $ | (118,970 | ) |  | $ | 59,867 |  |  | $ | 49,197 |  |  | $ | (46,465 | ) |  | $ | (56,371 | )
Total assets(1)(3) | $ | 5,478,439 |  |  | $ | 409,635 |  |  | $ | 470,614 |  |  | $ | (709,313 | ) |  | $ | 5,649,375 |
Property, plant and equipment, net | 5,057,311 |  |  | 264,956 |  |  | 61,402 |  |  | (165,427 | ) |  | 5,218,242 |
Capital expenditures(2) | 537,806 |  |  | 96,947 |  |  | 21,711 |  |  | (46,465 | ) |  | 609,999 |
Depreciation, depletion and amortization | 479,693 |  |  | 5,764 |  |  | 19,073 |  |  | (19,208 | ) |  | 485,322 |
Impairment | 46,109 |  |  | — |  |  | — |  |  | — |  |  | 46,109 |
__________________
(1) | Intercompany receivables (payables) for all segments were reclassified to capital contributions from (distributions to) parent and not included in total assets.
(2) | Capital expenditures (including acquisitions) reflected in the table above differ from the amounts for capital expenditures and acquisitions of oil and gas properties shown in the Company’s Consolidated Statements 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 Statements of Cash Flows are presented on a cash basis. Acquisitions totaled $54.0 million, $781.5 million and $28.7 million for the years ended December 31, 2017, 2016 and 2015, respectively, in the exploration and production segment.
(3) | Total assets for the exploration and production segment include $26.7 million of assets held for sale as of December 31, 2015.

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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 30 -URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e8906-108599 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=68060357&loc=d3e8813-108599 Reference 3: 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=68060357&loc=d3e8721-108599 Reference 4: 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=35741047&loc=d3e13816-109267 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=68060357&loc=d3e8736-108599 + Details
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