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Supplementary Quarterly Financial Data (Unaudited) (Tables) | 12 Months Ended
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Dec. 31, 2016
Quarterly Financial Information Disclosure [Abstract] |
Schedule of Supplementary Quarterly Financial Data (Unaudited) |
|  | 2015 |
|  | First |  |  | Second |  |  | Third |  |  | Fourth |  |  | Total |
|  | (In thousands, except per share data) |
Total oil and gas sales |  | $ | 66,522 |  |  | $ | 77,312 |  |  | $ | 61,360 |  |  | $ | 47,228 |  |  | $ | 252,422 |
Operating loss |  | $ | (96,928 | ) |  | $ | (182,185 | ) |  | $ | (596,026 | ) |  | $ | (290,515 | ) |  | $ | (1,165,654 | )
Net loss |  | $ | (78,502 | ) |  | $ | (135,068 | ) |  | $ | (544,996 | ) |  | $ | (288,543 | ) |  | $ | (1,047,109 | )
Loss per share: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic and diluted |  | $ | (8.53 | ) |  | $ | (14.64 | ) |  | $ | (59.05 | ) |  | $ | (31.26 | ) |  | $ | (113.53 | )
|  | 2016 |
|  | First |  |  | Second |  |  | Third |  |  | Fourth |  |  | Total |
|  | (In thousands, except per share data) |
Total oil and gas sales |  | $ | 36,163 |  |  | $ | 40,715 |  |  | $ | 50,330 |  |  | $ | 48,498 |  |  | $ | 175,706 |
Operating loss |  | $ | (56,490 | ) |  | $ | (22,706 | ) |  | $ | (98,789 | ) |  | $ | (5,805 | ) |  | $ | (183,790 | )
Net income (loss) |  | $ | (56,577 | ) |  | $ | 4,852 |  |  | $ | (28,476 | ) |  | $ | (54,933 | ) |  | $ | (135,134 | )
Income (loss) per share: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic and diluted |  | $ | (5.71 | ) |  | $ | 0.42 |  |  | $ | (2.32 | ) |  | $ | (4.48 | ) |  | $ | (11.52 | )
Summary of Results of Operations from Non-Routine Items | Results of operations include the following non-routine items of income (expense), which are presented before the effect of income taxes:
|  | 2015 |
|  | First |  |  | Second |  |  | Third |  |  | Fourth |  |  | Total |
|  | (In thousands) |
Gain (loss) on sale of oil and gas properties |  | $ | — |  |  | $ | (111,830 | ) |  | $ | 52 |  |  | $ | (307 | ) |  | $ | (112,085 | )
Net gain (loss) on extinguishment of debt |  | $ | (2,735 | ) |  | $ | 7,267 |  |  | $ | 51,054 |  |  | $ | 23,155 |  |  | $ | 78,741 |
Impairments of unproved oil and gas properties |  | $ | (40,432 | ) |  | $ | (23,040 | ) |  | $ | (5,090 | ) |  | $ | (385 | ) |  | $ | (68,947 | )
Impairments of proved oil and gas properties |  | $ | (403 | ) |  | $ | (1,984 | ) |  | $ | (544,714 | ) |  | $ | (254,246 | ) |  | $ | (801,347 | )
|  | 2016 |
|  | First |  |  | Second |  |  | Third |  |  | Fourth |  |  | Total |
|  | (In thousands) |
Gain (loss) on sale of oil and gas properties |  | $ | 740 |  |  | $ | (1,647 | ) |  | $ | (13,196 | ) |  | $ | (212 | ) |  | $ | (14,315 | )
Net gain (loss) on extinguishment of debt |  | $ | 33,380 |  |  | $ | 56,196 |  |  | $ | 100,540 |  |  | $ | (1,064 | ) |  | $ | 189,052 |
Impairments of unproved oil and gas properties |  | $ | (7,753 | ) |  | $ | — |  |  | $ | (76,391 | ) |  | $ | — |  |  | $ | (84,144 | )
Impairments of proved oil and gas properties |  | $ | (22,718 | ) |  | $ | (1,742 | ) |  | $ | (113 | ) |  | $ | (2,561 | ) |  | $ | (27,134 | )

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