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Earnings per Share (Tables) | 3 Months Ended
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Mar. 31, 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 March 31,
(In thousands, except per share data) |  | 2019 |  | 2018
Basic earnings per share: |  |  |  |
Net income |  | $ | 151,941 |  |  | $ | 143,637 |
Weighted average common shares outstanding - basic |  | 355,653 |  |  | 370,908 |
Basic earnings per share |  | $ | 0.43 |  |  | $ | 0.39 |
Diluted earnings per share: |  |  |
Net income |  | $ | 151,941 |  |  | $ | 143,637 |
Interest expense, net of tax (1): |  |  |  |
9% Debentures |  | 4,566 |  |  | 4,566 |
Diluted income available to common shareholders |  | $ | 156,507 |  |  | $ | 148,203 |
Weighted average common shares outstanding - basic |  | 355,653 |  |  | 370,908 |
Effect of dilutive securities: |  |  |  |
Unvested RSUs |  | 1,986 |  |  | 1,626 |
9% Debentures |  | 19,028 |  |  | 19,028 |
Weighted average common shares outstanding - diluted |  | 376,667 |  |  | 391,562 |
Diluted earnings per share |  | $ | 0.42 |  |  | $ | 0.38 |
(1) | The periods ended March 31, 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://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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