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Business Segment Information | 3 Months Ended
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Mar. 31, 2018
Segment Reporting [Abstract] |
Business Segment Information | Business Segment Information The Company’s exploration and production segment is engaged in the acquisition and development of oil and natural gas properties. Revenues for the exploration and production segment are derived from the sale of oil and natural gas production. The Company’s midstream services business segment (OMS) performs produced and flowback water gathering and disposal services, fresh water services, natural gas gathering and processing and crude oil gathering and transportation and other midstream services for the Company’s oil and natural gas wells operated by OPNA and other third-party operators. Revenues for the midstream segment are primarily derived from produced and flowback water pipeline transport, produced and flowback water disposal, fresh water sales, natural gas gathering and processing and crude oil gathering, blending, stabilization and transportation. The Company’s well services business segment (OWS) performs completion services for the Company’s oil and natural gas wells operated by OPNA. Revenues for the well services segment are derived from providing well services, product sales and equipment rentals. The revenues and expenses related to work performed by OMS and OWS for OPNA’s working interests are eliminated in consolidation, and only the revenues and expenses related to non-affiliated working interest owners are included in the Company’s Condensed Consolidated Statements of Operations. These segments represent the Company’s three operating units, each offering different products and services. The Company’s corporate activities have been allocated to the supported business segments accordingly. 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 DD&A. 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)
Three months ended March 31, 2018: |
Revenues from non-affiliates | $ | 381,708 |  |  | $ | 27,922 |  |  | $ | 11,586 |  |  | $ | — |  |  | $ | 421,216 |
Inter-segment revenues | — |  |  | 36,640 |  |  | 33,302 |  |  | (69,942 | ) |  | — |
Total revenues | 381,708 |  |  | 64,562 |  |  | 44,888 |  |  | (69,942 | ) |  | 421,216 |
Operating income | 79,962 |  |  | 32,237 |  |  | 8,148 |  |  | (7,362 | ) |  | 112,985 |
Other expense | (108,146 | ) |  | (258 | ) |  | (41 | ) |  | — |  |  | (108,445 | )
Income (loss) before income taxes including non-controlling interests | $ | (28,184 | ) |  | $ | 31,979 |  |  | $ | 8,107 |  |  | $ | (7,362 | ) |  | $ | 4,540 |
Three months ended March 31, 2017: |
Revenues from non-affiliates | $ | 264,883 |  |  | $ | 14,606 |  |  | $ | 5,627 |  |  | $ | — |  |  | $ | 285,116 |
Inter-segment revenues | — |  |  | 23,035 |  |  | 15,352 |  |  | (38,387 | ) |  | — |
Total revenues | 264,883 |  |  | 37,641 |  |  | 20,979 |  |  | (38,387 | ) |  | 285,116 |
Operating income (loss) | 968 |  |  | 20,763 |  |  | (3,592 | ) |  | 1,953 |  |  | 20,092 |
Other income (expense) | 19,768 |  |  | (2 | ) |  | 4 |  |  | — |  |  | 19,770 |
Income (loss) before income taxes | $ | 20,736 |  |  | $ | 20,761 |  |  | $ | (3,588 | ) |  | $ | 1,953 |  |  | $ | 39,862 |
At March 31, 2018: |
Property, plant and equipment, net | $ | 6,600,397 |  |  | $ | 732,801 |  |  | $ | 47,310 |  |  | $ | (193,902 | ) |  | $ | 7,186,606 |
Total assets(1) | 6,994,927 |  |  | 752,301 |  |  | 50,605 |  |  | (158,903 | ) |  | 7,638,930 |
At December 31, 2017: |  |  |  |  |  |  |  |  |
Property, plant and equipment, net | $ | 5,663,323 |  |  | $ | 649,923 |  |  | $ | 46,779 |  |  | $ | (186,539 | ) |  | $ | 6,173,486 |
Total assets(1) | 6,050,255 |  |  | 663,614 |  |  | 52,800 |  |  | (151,539 | ) |  | 6,615,130 |
___________________
(1) | Intercompany receivables (payables) for all segments were reclassified to capital contributions from (distributions to) parent and not included in total assets.

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- Definition The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -URI http://asc.fasb.org/topic&trid=2134510 + Details
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