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Earnings per Share (Tables) | 6 Months Ended
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Jun. 30, 2019
Earnings Per Share [Abstract] |
Calculation of earnings (loss) per share | Table 6.1 reconciles the numerators and denominators used to calculate basic and diluted EPS.
Earnings per share
Table | 6.1 |  |  |  |  |  |  |  |
|  |  | Three Months Ended June 30, |  | Six Months Ended June 30,
(In thousands, except per share data) |  | 2019 |  | 2018 |  | 2019 |  | 2018
Basic earnings per share: |  |  |  |  |  |  |  |
Net income |  | $ | 167,778 |  |  | $ | 186,814 |  |  | $ | 319,719 |  |  | $ | 330,451 |
Weighted average common shares outstanding - basic |  | 355,734 |  |  | 368,578 |  |  | 355,694 |  |  | 369,736 |
Basic earnings per share |  | $ | 0.47 |  |  | $ | 0.51 |  |  | $ | 0.90 |  |  | $ | 0.89 |
Diluted earnings per share: |  |  |  |  |  |  |
Net income |  | $ | 167,778 |  |  | $ | 186,814 |  |  | $ | 319,719 |  |  | $ | 330,451 |
Interest expense, net of tax (1): |  |  |  |  |  |  |  |
9% Debentures |  | 4,566 |  |  | 4,566 |  |  | 9,132 |  |  | 9,132 |
Diluted income available to common shareholders |  | $ | 172,344 |  |  | $ | 191,380 |  |  | $ | 328,851 |  |  | $ | 339,583 |
Weighted average common shares outstanding - basic |  | 355,734 |  |  | 368,578 |  |  | 355,694 |  |  | 369,736 |
Effect of dilutive securities: |  |  |  |  |  |  |  |
Unvested RSUs |  | 1,841 |  |  | 1,275 |  |  | 1,913 |  |  | 1,472 |
9% Debentures |  | 19,028 |  |  | 19,028 |  |  | 19,028 |  |  | 19,028 |
Weighted average common shares outstanding - diluted |  | 376,603 |  |  | 388,881 |  |  | 376,635 |  |  | 390,236 |
Diluted earnings per share |  | $ | 0.46 |  |  | $ | 0.49 |  |  | $ | 0.87 |  |  | $ | 0.87 |
(1) The periods ended June 30, 2019 and 2018 were tax-effected at a rate of 21%.

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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://fasb.org/us-gaap/role/ref/legacyRef -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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