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BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Consolidated Statements of Operations (Details) - USD ($) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Sep. 30, 2019 | Sep. 30, 2018
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |  |  |  |  |  |
Depletion, depreciation and amortization | $ 163,270,000 |  |  | $ 119,915,000 |  |  | $ 406,654,000 | $ 352,848,000
Impairment of oil and natural gas properties | 571,442,000 |  |  | 0 |  |  | 571,442,000 | 0
Total costs and expenses | 857,591,000 |  |  | 247,386,000 |  |  | 1,328,735,000 | 701,409,000
(LOSS) INCOME FROM OPERATIONS | (572,416,000) |  |  | 113,576,000 |  |  | (263,988,000) | 237,685,000
LOSS BEFORE INCOME TAXES | (628,849,000) |  |  | 95,150,000 |  |  | (510,982,000) | 296,490,000
INCOME TAX BENEFIT | (144,047,000) |  |  | 0 |  |  | (323,378,000) | (69,000)
Net loss | $ (484,802,000) | $ 234,956,000 | $ 62,242,000 | $ 95,150,000 | $ 111,319,000 | $ 90,090,000 | $ (187,604,000) | $ 296,559,000
Basic (in usd per share) | $ (3.04) |  |  | $ 0.55 |  |  | $ (1.17) | $ 1.69
Diluted (in usd per share) | $ (3.04) |  |  | $ 0.55 |  |  | $ (1.17) | $ 1.68
Weighted average common shares outstanding - Diluted (in shares) | 159,548,477 |  |  | 173,304,914 |  |  | 160,553,796 | 176,440,461
As Reported |  |  |  |  |  |  |  |
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |  |  |  |  |  |
Depletion, depreciation and amortization | $ 145,490,000 |  |  |  |  |  | $ 388,874,000 |
Impairment of oil and natural gas properties | 35,647,000 |  |  |  |  |  | 35,647,000 |
Total costs and expenses | 304,016,000 |  |  |  |  |  | 775,160,000 |
(LOSS) INCOME FROM OPERATIONS | (18,841,000) |  |  |  |  |  | 289,587,000 |
LOSS BEFORE INCOME TAXES | (75,274,000) |  |  |  |  |  | 42,593,000 |
INCOME TAX BENEFIT | (26,522,000) |  |  |  |  |  | (205,853,000) |
Net loss | $ (48,752,000) |  |  |  |  |  | $ 248,446,000 |
Basic (in usd per share) | $ (0.31) |  |  |  |  |  | $ 1.55 |
Diluted (in usd per share) | $ (0.31) |  |  |  |  |  | $ 1.51 |
Weighted average common shares outstanding - Diluted (in shares) |  |  |  |  |  |  | 164,820,002 |
Adjustments |  |  |  |  |  |  |  |
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |  |  |  |  |  |
Depletion, depreciation and amortization | $ 17,780,000 |  |  |  |  |  | $ 17,780,000 |
Impairment of oil and natural gas properties | 535,795,000 |  |  |  |  |  | 535,795,000 |
Total costs and expenses | 553,575,000 |  |  |  |  |  | 553,575,000 |
(LOSS) INCOME FROM OPERATIONS | (553,575,000) |  |  |  |  |  | (553,575,000) |
LOSS BEFORE INCOME TAXES | (553,575,000) |  |  |  |  |  | (553,575,000) |
INCOME TAX BENEFIT | (117,525,000) |  |  |  |  |  | (117,525,000) |
Net loss | $ (436,050,000) |  |  |  |  |  | $ (436,050,000) |
Basic (in usd per share) | $ (2.73) |  |  |  |  |  | $ (2.72) |
Diluted (in usd per share) | $ (2.73) |  |  |  |  |  | $ (2.68) |
Weighted average common shares outstanding - Diluted (in shares) |  |  |  |  |  |  | (4,266,206) |

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