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ACQUISITIONS AND DIVESTITURES-Pecos County Acquisition (Details) - USD ($) $ / shares in Units, $ in Thousands |  |  |  | 3 Months Ended | 9 Months Ended
--- | --- | --- | --- | --- | ---
Feb. 28, 2017 | Jan. 24, 2017 | Jan. 18, 2017 | Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2018 | Sep. 30, 2017
Pro forma financial information |  |  |  |  |  |  |
Net income (loss) available to common stockholders |  |  |  | $ (81,837) | $ 419,287 | $ (100,709) | $ 580,809
8% Convertible Preferred Stock |  |  |  |  |  |  |
ACQUISITIONS AND DIVESTITURES |  |  |  |  |  |  |
Dividend rate (as a percent) |  | 8.00% | 8.00% |  |  |  |
Pecos County Assets |  |  |  |  |  |  |
ACQUISITIONS AND DIVESTITURES |  |  |  |  |  |  |
Purchase price | $ 699,200 |  |  |  |  |  |
Pro forma financial information |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  | 360,590
Net income (loss) |  |  |  |  |  |  | 635,854
Net income (loss) available to common stockholders |  |  |  |  |  |  | $ 587,847
Pro forma net income (loss) per share of common stock: |  |  |  |  |  |  |
Basic (in dollars per share) |  |  |  |  |  |  | $ 4.61
Diluted (in dollars per share) |  |  |  |  |  |  | $ 4.58

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