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Earnings per Share | 3 Months Ended
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Mar. 31, 2018
Earnings Per Share [Abstract] |
Earnings per Share | Earnings per Share Basic earnings per share (“EPS”) is calculated by dividing net income by the weighted average number of shares of common stock outstanding. Diluted EPS includes the components of basic EPS and also gives effect to dilutive common stock equivalents. We calculate diluted EPS using the treasury stock method and if-converted method. Under the if-converted method, diluted EPS reflects the potential dilution that could occur if our convertible debt instruments result in the issuance of common stock. The determination of potentially issuable shares does not consider the satisfaction of the conversion requirements and the shares are included in the determination of diluted EPS as of the beginning of the period, if dilutive. During the quarter ended March 31, 2018, we had 9% Debentures outstanding that could result in potentially issuable shares. For purposes of calculating basic and diluted EPS, vested restricted stock and restricted stock units ("RSUs") are considered outstanding. Table 6.1 reconciles the numerators and denominators used to calculate basic and diluted EPS.
| Table | 6.1 |  |  |  |
Earnings per share |  |  |  | Three Months Ended March 31,
(In thousands, except per share data) |  | 2018 |  | 2017
| Basic earnings per share: |  |  |  |
| Net income |  | $ | 143,637 |  |  | $ | 89,798 |
| Weighted average common shares outstanding - basic |  | 370,908 |  |  | 341,009 |
| Basic earnings per share |  | $ | 0.39 |  |  | $ | 0.26 |
| Diluted earnings per share: |  |  |
| Net income |  | $ | 143,637 |  |  | $ | 89,798 |
| Interest expense, net of tax (1): |  |  |  |
| 2% Notes |  | — |  |  | 823 |
| 5% Notes |  | — |  |  | 1,282 |
| 9% Debentures |  | 4,566 |  |  | 3,757 |
| Diluted income available to common shareholders |  | $ | 148,203 |  |  | $ | 95,660 |
| Weighted average common shares outstanding - basic |  | 370,908 |  |  | 341,009 |
| Effect of dilutive securities: |  |  |  |
| Unvested RSUs |  | 1,626 |  |  | 1,488 |
| 2% Notes |  | — |  |  | 29,859 |
| 5% Notes |  | — |  |  | 10,791 |
| 9% Debentures |  | 19,028 |  |  | 19,028 |
| Weighted average common shares outstanding - diluted |  | 391,562 |  |  | 402,175 |
| Diluted earnings per share |  | $ | 0.38 |  |  | $ | 0.24 |
(1) | The three months ended March 31, 2018 and 2017 were tax effected at a rate of 21% and 35%, respectively.

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- Definition The entire disclosure for earnings per share. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -URI http://asc.fasb.org/topic&trid=2144383 + Details
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