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Earnings Per Share (Notes) | 6 Months Ended
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Jun. 30, 2016
Earnings Per Share [Abstract] |
Earnings Per Share | Earnings Per Share Basic earnings per common share (EPS) excludes dilution and is computed by dividing Net income attributable to common stockholders by the weighted average number of common shares outstanding for the period. Diluted EPS reflects the potential dilution that could occur if securities or other obligations to issue common stock were exercised or converted into common stock or resulted in the issuance of common shares that then shared in our earnings. A reconciliation of the numerators and denominators of the basic and diluted EPS computations is presented below:
| Three Months Ended |  | Six Months Ended
| June 30, |  | June 30,
| 2016 |  | 2015 |  | 2016 |  | 2015
| (In thousands, except per share amounts)
Amounts attributable to common stockholders: |  |  |  |  |  |  |
Net income: |  |  |  |  |  |  |
Net income — basic | $ | 15,620 |  |  | $ | 52,595 |  |  | $ | 63,065 |  |  | $ | 113,970 |
After tax interest on convertible debt | 10 |  |  | 12 |  |  | 22 |  |  | 25 |
Net income — diluted | $ | 15,630 |  |  | $ | 52,607 |  |  | $ | 63,087 |  |  | $ | 113,995 |
Weighted average shares (denominator): |  |  |  |  |  |  |
Weighted average shares — basic | 193,806 |  |  | 202,466 |  |  | 194,366 |  |  | 202,966 |
Stock options | 2,788 |  |  | 4,159 |  |  | 2,975 |  |  | 4,134 |
Restricted stock units | 3 |  |  | — |  |  | 1 |  |  | — |
Convertible debt | 121 |  |  | 121 |  |  | 121 |  |  | 121 |
Weighted average shares — diluted | 196,718 |  |  | 206,746 |  |  | 197,463 |  |  | 207,221 |
Net income per share: |  |  |  |  |  |  |
Basic | $ | 0.08 |  |  | $ | 0.26 |  |  | $ | 0.32 |  |  | $ | 0.56 |
Diluted | $ | 0.08 |  |  | $ | 0.25 |  |  | $ | 0.32 |  |  | $ | 0.55 |

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