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Revenue from Contracts with Customers (Tables) | 3 Months Ended
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Mar. 31, 2019
Revenue from Contract with Customer [Abstract] |
Disaggregation of Revenue [Table Text Block] | The table below presents oil, gas, and NGL production revenue by product type for each of the Company’s operating regions for the three months ended March 31, 2019, and 2018:
| Permian |  | South Texas & Gulf Coast |  | Rocky Mountain |  | Total
| Three Months Ended March 31, |  | Three Months Ended March 31, |  | Three Months Ended March 31, |  | Three Months Ended March 31,
| 2019 |  | 2018 |  | 2019 |  | 2018 |  | 2019 |  | 2018 |  | 2019 |  | 2018
| (in thousands)
Oil production revenue | $ | 225,247 |  |  | $ | 205,794 |  |  | $ | 13,814 |  |  | $ | 19,583 |  |  | $ | — |  |  | $ | 35,683 |  |  | $ | 239,061 |  |  | $ | 261,060 |
Gas production revenue | 15,592 |  |  | 24,876 |  |  | 49,521 |  |  | 52,733 |  |  | — |  |  | 1,500 |  |  | 65,113 |  |  | 79,109 |
NGL production revenue | 21 |  |  | 124 |  |  | 36,281 |  |  | 41,770 |  |  | — |  |  | 823 |  |  | 36,302 |  |  | 42,717 |
Total | $ | 240,860 |  |  | $ | 230,794 |  |  | $ | 99,616 |  |  | $ | 114,086 |  |  | $ | — |  |  | $ | 38,006 |  |  | $ | 340,476 |  |  | $ | 382,886 |
Relative percentage | 71 | % |  | 60 | % |  | 29 | % |  | 30 | % |  | — | % |  | 10 | % |  | 100 | % |  | 100 | %
____________________________________________ Note: Amounts may not calculate due to rounding.

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- Definition Tabular disclosure of disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130545-203045 + Details
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