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ACQUISITIONS AND DIVESTITURES - West Quito Draw Properties (Details) - USD ($) $ in Millions | Feb. 06, 2018 | Sep. 30, 2019 | Aug. 02, 2019 | Dec. 31, 2018 | Feb. 16, 2017
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West Quito Draw Properties |  |  |  |  |
ACQUISITIONS AND DIVESTITURES |  |  |  |  |
Purchase price | $ 198.5 |  |  |  |
6.75% senior notes due 2025 |  |  |  |  |
ACQUISITIONS AND DIVESTITURES |  |  |  |  |
Interest rate (as a percent) |  | 6.75% | 6.75% | 6.75% | 6.75%

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