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Earnings per Share (Details) $ / shares in Units, shares in Thousands, $ in Thousands |  | 3 Months Ended | 9 Months Ended |
--- | --- | --- | --- | ---
Aug. 12, 2016 shares | Sep. 30, 2016 USD ($) $ / shares shares | Sep. 30, 2015 USD ($) $ / shares shares | Sep. 30, 2016 USD ($) $ / shares shares | Sep. 30, 2015 USD ($) $ / shares shares | Dec. 31, 2015 USD ($)
Earnings per share |  |  |  |  |  |
Stock Issued During Period, Shares, New Issues | 18,400 |  |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount |  | 506 | 0 | 193 | 380 |
Debt Instrument, Face Amount | $ |  | $ 2,803,736 |  | $ 2,803,736 |  | $ 2,350,000
Capped Call, Cap Price | $ / shares |  | $ 60.00 |  | $ 60.00 |  |
Calculation of basic and diluted earnings per share |  |  |  |  |  |
Net income (loss) | $ |  | $ (40,907) | $ 3,114 | $ (556,798) | $ (107,452) |
Basic weighted-average common shares outstanding |  | 78,468 | 67,961 | 71,574 | 67,638 |
Add: dilutive effect of stock options, unvested RSU's, and contingent PSU's |  | 0 | 158 | 0 | 0 |
Diluted weighted-average common shares outstanding |  | 78,468 | 68,119 | 71,574 | 67,638 |
Basic net income (loss) per common share | $ / shares |  | $ (0.52) | $ 0.05 | $ (7.78) | $ (1.59) |
Diluted net income (loss) per common share | $ / shares |  | $ (0.52) | $ 0.05 | $ (7.78) | $ (1.59) |
Performance Shares [Member] |  |  |  |  |  |
Earnings per share |  |  |  |  |  |
Share-based Compensation, Awards Other Than Options, Performance Measurement Period |  |  |  | 3 years |  |
Multiplier Applied to PSU Awards at Settlement |  |  |  | 0.2 |  |
Minimum [Member] | Performance Shares [Member] |  |  |  |  |  |
Earnings per share |  |  |  |  |  |
Multiplier Applied to PSU Awards at Settlement |  |  |  | 0 |  |
Maximum [Member] | Performance Shares [Member] |  |  |  |  |  |
Earnings per share |  |  |  |  |  |
Multiplier Applied to PSU Awards at Settlement |  |  |  | 2.00 |  |
1.50% Senior Convertible Notes Due 2021 [Domain] |  |  |  |  |  |
Earnings per share |  |  |  |  |  |
Debt Instrument, Face Amount | $ |  | $ 172,500 |  | $ 172,500 |  | $ 0
Convertible Debt [Member] | 1.50% Senior Convertible Notes Due 2021 [Domain] |  |  |  |  |  |
Earnings per share |  |  |  |  |  |
Debt Instrument, Face Amount | $ |  | $ 172,500 |  | $ 172,500 |  |
Debt Instrument, Convertible, Conversion Price | $ / shares |  | $ 40.50 |  | $ 40.50 |  |

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