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Loss per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2016 | Sep. 30, 2015 | Sep. 30, 2016 | Sep. 30, 2015 | Dec. 31, 2015
Earnings Per Share [Abstract] |  |  |  |  |
Basic loss | $ (404,337) | $ (649,526) | $ (1,249,795) | $ (3,070,916) |
Weighted Average Shares, Basic | 718,373 | 526,388 | 708,788 | 500,077 |
Basic loss per share (in dollars per share) | $ (0.56) | $ (1.23) | $ (1.76) | $ (6.14) |
Effect of dilutive securities |  |  |  |  |
Restricted stock and units | $ 0 | $ 0 | $ 0 | $ 0 |
Restricted stock and units (in shares) | 0 | 0 | 0 | 0 |
Convertible preferred stock |  | $ 0 |  | $ 0 |
Convertible preferred stock (in shares) |  | 0 |  | 0 |
Convertible senior unsecured notes |  | $ 0 |  | $ 0 |
Convertible senior unsecured notes (in shares) |  | 0 |  | 0 |
Diluted loss | $ (404,337) | $ (649,526) | $ (1,249,795) | $ (3,070,916) |
Weighted average shares, diluted | 718,373 | 526,388 | 708,788 | 500,077 |
Diluted loss per share (in dollars per share) | $ (0.56) | $ (1.23) | $ (1.76) | $ (6.14) |
8.125% Convertible Senior Notes due 2022 |  |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |  |
Long-term debt, fixed interest rate | 8.125% |  | 8.125% |  |
7.5% Convertible Senior Notes due 2023 |  |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |  |
Long-term debt, fixed interest rate | 7.50% |  | 7.50% |  |
Convertible Preferred Stock |  |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |  |
Antidilutive securities excluded from computation of earnings per share (in shares) |  | 71,700 |  | 71,700 |
Convertible Debt |  |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |  |
Antidilutive securities excluded from computation of earnings per share (in shares) |  | 43,400 |  | 14,600 |
8.5% Convertible perpetual preferred stock |  |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |  |
Preferred stock, dividend rate, percentage |  | 8.50% | 8.50% | 8.50% | 8.50%
7.0% Convertible perpetual preferred stock |  |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |  |
Preferred stock, dividend rate, percentage |  | 7.00% | 7.00% | 7.00% | 7.00%
Convertible Debt | 8.125% Convertible Senior Notes due 2022 |  |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |  |
Long-term debt, fixed interest rate | 8.125% | 8.125% | 8.125% | 8.125% |
Convertible Debt | 7.5% Convertible Senior Notes due 2023 |  |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |  |
Long-term debt, fixed interest rate | 7.50% | 7.50% | 7.50% | 7.50% |

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