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OPERATING REVENUES (Tables) | 6 Months Ended
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Jun. 30, 2018
OPERATING REVENUES |
Schedule of disaggregation of revenues by major source | The following table disaggregates the Company's revenues by major source, in order to depict how the nature, timing, and uncertainty of revenue and cash flows are affected by economic factors in the Company's single basin operations, for the periods indicated (in thousands):
|  | Three Months Ended June 30, |  | Six Months Ended June 30, |
|  | 2018 |  | 2017(1) |  | 2018 |  | 2017(1) |
|  | (Unaudited) |  | (Unaudited) |
Operating revenues: |  |  |  |  |  |  |  |  |  |  |  |  |
Oil, natural gas and natural gas liquids sales: |  |  |  |  |  |  |  |  |  |  |  |  |
Oil |  | $ | 48,756 |  | $ | 108,695 |  | $ | 91,825 |  | $ | 231,216 |
Natural gas |  |  | 1,560 |  |  | 5,946 |  |  | 3,879 |  |  | 12,165 |
Natural gas liquids |  |  | 4,991 |  |  | 5,306 |  |  | 8,703 |  |  | 11,331 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Total oil, natural gas and natural gas liquids sales |  |  | 55,307 |  |  | 119,947 |  |  | 104,407 |  |  | 254,712 |
Other |  |  | 108 |  |  | 190 |  |  | 263 |  |  | 1,023 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Total operating revenues |  | $ | 55,415 |  | $ | 120,137 |  | $ | 104,670 |  | $ | 255,735 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
(1) | As noted above, prior period amounts have not been adjusted under the modified retrospective method of adoption.

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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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=82913847&loc=SL49130545-203045 + Details
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