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OPERATING REVENUES - Revenue Recognition (Details) - USD ($) $ in Thousands |  | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Oct. 01, 2019 | Dec. 31, 2019 | Oct. 01, 2019 | Sep. 30, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Disaggregation of operating revenue |  |  |  |  |  |
Financial Designation, Predecessor and Successor [Fixed List] | Predecessor | Successor | Predecessor | Predecessor | Predecessor | Predecessor
Total oil, natural gas and natural gas liquids sales |  | $ 65,115 | $ 158,360 |  | $ 225,529 | $ 375,837
Other |  | 467 | 743 |  | 1,080 | 2,128
Total operating revenues |  | 65,582 | 159,103 |  | 226,609 | 377,965
Oil |  |  |  |  |  |
Disaggregation of operating revenue |  |  |  |  |  |
Total oil, natural gas and natural gas liquids sales |  | 58,325 | 145,024 |  | 199,601 | 340,674
Oil |  |  |  |  |  |
Disaggregation of operating revenue |  |  |  |  |  |
Total oil, natural gas and natural gas liquids sales |  | 58,325 | 145,024 |  | 199,601 | 340,674
Natural gas |  |  |  |  |  |
Disaggregation of operating revenue |  |  |  |  |  |
Total oil, natural gas and natural gas liquids sales |  | 1,719 | 107 |  | 6,791 | 16,194
NGLs |  |  |  |  |  |
Disaggregation of operating revenue |  |  |  |  |  |
Total oil, natural gas and natural gas liquids sales |  | 5,071 | $ 13,229 |  | 19,137 | $ 18,969
Accounts receivable |  |  |  |  |  |
Disaggregation of operating revenue |  |  |  |  |  |
Due from contracts with customers |  | $ 36,400 |  |  | $ 26,400 |

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