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Earnings (Losses) Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015 | Jan. 31, 2017
Net income (loss) (numerator): |  |  |  |  |  |  |  |  |  |  |  |
Income (loss) from continuing operations, net of tax | $ (114,725) | $ (119,285) | $ (115,476) | $ (147,628) | $ (330,196) | $ (97,839) | $ (186,565) | $ (396,644) | $ (497,114) | $ (1,011,244) | $ (329,497) |
Less: net (income) loss attributable to noncontrolling interest | (1,177) | (2,113) | (1,971) | (917) | (1,125) | (1,185) | 2,899 | (724) | (6,178) | (135) | (381) |
Less: (earnings) losses allocated to unvested shareholders |  |  |  |  |  |  |  |  | 13,210 | 22,730 | 7,820 |
Adjusted income (loss) from continuing operations, net of tax - basic |  |  |  |  |  |  |  |  | (490,082) | (988,649) | (322,058) |
Income (loss) from discontinued operations, net of tax | $ (442) | $ (27,134) | $ (15,504) | $ (439) | $ (4,266) | $ (12,187) | $ (984) | $ (926) | $ (43,519) | $ (18,363) | $ (42,797) |
Weighted-average number of shares outstanding - basic |  |  |  |  |  |  |  |  | 280,653 | 276,475 | 282,982 |
Earnings (losses) Per Share - Basic |  |  |  |  |  |  |  |  |  |  |  |
Basic from continuing operations (in dollars per share) | $ (0.40) | $ (0.42) | $ (0.41) | $ (0.52) | $ (1.17) | $ (0.35) | $ (0.65) | $ (1.41) | $ (1.75) | $ (3.58) | $ (1.14) |
Basic from discontinued operations (in dollars per share) |  | (0.10) | (0.05) |  | (0.01) | (0.04) |  |  | (0.15) | (0.06) | (0.15) |
Total Basic (in dollars per share) | $ (0.40) | $ (0.52) | $ (0.46) | $ (0.52) | $ (1.18) | $ (0.39) | $ (0.65) | $ (1.41) | $ (1.90) | $ (3.64) | $ (1.29) |
DILUTED EPS: |  |  |  |  |  |  |  |  |  |  |  |
Adjusted income (loss) from continuing operations, net of tax - basic |  |  |  |  |  |  |  |  | $ (490,082) | $ (988,649) | $ (322,058) |
Adjusted income (loss) from continuing operations, net of tax - diluted |  |  |  |  |  |  |  |  | (490,082) | (988,649) | (322,058) |
Income (loss) from discontinued operations, net of tax | $ (442) | $ (27,134) | $ (15,504) | $ (439) | $ (4,266) | $ (12,187) | $ (984) | $ (926) | $ (43,519) | $ (18,363) | $ (42,797) |
Weighted-average number of shares outstanding - basic |  |  |  |  |  |  |  |  | 280,653 | 276,475 | 282,982 |
Weighted-average number of shares outstanding - diluted |  |  |  |  |  |  |  |  | 280,653 | 276,475 | 282,982 |
Earnings (losses) per share: |  |  |  |  |  |  |  |  |  |  |  |
Diluted from continuing operations (in dollars per share) | $ (0.40) | $ (0.42) | $ (0.41) | $ (0.52) | $ (1.17) | $ (0.35) | $ (0.65) | $ (1.41) | $ (1.75) | $ (3.58) | $ (1.14) |
Diluted from discontinued operations (in dollars per share) |  | (0.10) | (0.05) |  | (0.01) | (0.04) |  |  | (0.15) | (0.06) | (0.15) |
Total Diluted (in dollars per share) | $ (0.40) | $ (0.52) | $ (0.46) | $ (0.52) | $ (1.18) | $ (0.39) | $ (0.65) | $ (1.41) | $ (1.90) | $ (3.64) | $ (1.29) |
0.75% senior exchangeable notes due January 2024 |  |  |  |  |  |  |  |  |  |  |  |
Earnings (losses) per share: |  |  |  |  |  |  |  |  |  |  |  |
Aggregate amount of senior notes | $ 575,000 |  |  |  |  |  |  |  | $ 575,000 |  |  | $ 575,000
Interest rate on senior notes due (as a percent) | 0.75% |  |  |  |  |  |  |  | 0.75% |  |  | 0.75%
0.75% senior exchangeable notes due January 2024 | Minimum |  |  |  |  |  |  |  |  |  |  |  |
Earnings (losses) per share: |  |  |  |  |  |  |  |  |  |  |  |
Share issued price (in dollars per share) | $ 25.16 |  |  |  |  |  |  |  | $ 25.16 |  |  |

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