| Computation of basic and diluted earnings per common share |
The following table shows the amounts used in computing our basic and diluted earnings per common share: | | | | | | | | | | | | | | | | | | For the Three Months Ended June 30, | | For the Six Months Ended June 30, | | 2013 | | 2012 | | 2013 | | 2012 | | (In thousands, except per share amounts) | Numerator for basic and diluted earnings per share: | | | | | | | | Income from continuing operations attributable to common stockholders | $ | 132,635 |
| | $ | 42,731 |
| | $ | 250,635 |
| | $ | 90,099 |
| Discontinued operations | (18,055 | ) | | 31,294 |
| | (23,862 | ) | | 74,552 |
| Net income attributable to common stockholders | $ | 114,580 |
| | $ | 74,025 |
| | $ | 226,773 |
| | $ | 164,651 |
| Denominator: | | | | | | | | Denominator for basic earnings per share—weighted average shares | 292,635 |
| | 290,170 |
| | 292,049 |
| | 289,281 |
| Effect of dilutive securities: | | | | | | | | Stock options | 567 |
| | 499 |
| | 627 |
| | 506 |
| Restricted stock awards | 148 |
| | 72 |
| | 134 |
| | 68 |
| OP units | 1,773 |
| | 1,851 |
| | 1,774 |
| | 1,856 |
| Denominator for diluted earnings per share—adjusted weighted average shares | 295,123 |
| | 292,592 |
| | 294,584 |
| | 291,711 |
| Basic earnings per share: | | | | | | | | Income from continuing operations attributable to common stockholders | $ | 0.45 |
| | $ | 0.15 |
| | $ | 0.86 |
| | $ | 0.31 |
| Discontinued operations | (0.06 | ) | | 0.11 |
| | (0.08 | ) | | 0.26 |
| Net income attributable to common stockholders | $ | 0.39 |
| | $ | 0.26 |
| | $ | 0.78 |
| | $ | 0.57 |
| Diluted earnings per share: | | | | | | | | Income from continuing operations attributable to common stockholders | $ | 0.45 |
| | $ | 0.14 |
| | $ | 0.85 |
| | $ | 0.30 |
| Discontinued operations | (0.06 | ) | | 0.11 |
| | (0.08 | ) | | 0.26 |
| Net income attributable to common stockholders | $ | 0.39 |
| | $ | 0.25 |
| | $ | 0.77 |
| | $ | 0.56 |
|
|