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Earnings per Share (Tables) | 12 Months Ended
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Dec. 31, 2016
Earnings Per Share [Abstract] |
Calculation of earnings (loss) per share | The following table reconciles basic and diluted EPS amounts:
(In thousands, except per share data) |  | Years Ended December 31,
| 2016 |  | 2015 |  | 2014
Basic earnings per share: |  |  |  |  |  |
Net income |  | $ | 342,517 |  |  | $ | 1,172,000 |  |  | $ | 251,949 |
Weighted average common shares outstanding |  | 342,890 |  |  | 339,552 |  |  | 338,523 |
Basic income per share |  | $ | 1.00 |  |  | $ | 3.45 |  |  | $ | 0.74 |
Diluted earnings per share: |  |  |  |  |  |
Net income |  | $ | 342,517 |  |  | $ | 1,172,000 |  |  | $ | 251,949 |
Interest expense, net of tax (1): |  |  |  |  |  |
2% Notes |  | 6,111 |  |  | 7,928 |  |  | 12,197 |
5% Notes |  | 6,362 |  |  | 12,228 |  |  | — |
9% Debentures |  | 15,893 |  |  | 22,786 |  |  | — |
Diluted income available to common shareholders |  | $ | 370,883 |  |  | $ | 1,214,942 |  |  | $ | 264,146 |
Weighted-average shares - Basic |  | 342,890 |  |  | 339,552 |  |  | 338,523 |
Effect of dilutive securities: |  |  |  |  |  |
Unvested restricted stock units |  | 1,470 |  |  | 2,113 |  |  | 3,082 |
2% Notes |  | 54,450 |  |  | 71,917 |  |  | 71,917 |
5% Notes |  | 13,107 |  |  | 25,603 |  |  | — |
9% Debentures |  | 20,075 |  |  | 28,854 |  |  | — |
Weighted-average shares - Diluted |  | 431,992 |  |  | 468,039 |  |  | 413,522 |
Diluted earnings per share |  | $ | 0.86 |  |  | $ | 2.60 |  |  | $ | 0.64 |
Anti-dilutive securities (in millions) |  | — |  |  | — |  |  | 54.5 |
(1) | Interest expense for the years ended December 31, 2016 and December 31, 2015 has been tax effected at a rate of 35%. Due to the valuation allowance recorded against deferred tax assets, interest expense for the year ended December 31, 2014 was not tax effected.

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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