| Earnings Per Share | 10. Earnings Per Share. Basic and diluted earnings per common share were calculated as follows: | | | | | Three months ended September 30, 2011 | | | | | | | | | | Weighted | | | | | | | (In thousands, except per share data) | | Net Earnings | | Average Shares | | Per Share | | | | | | | | | | | | | | | | | Basic earnings per common share ………… | $ | 31,224 | | | 60,030 | | | $ | 0.52 | | | | Effect of dilutive stock options …………… | | — | | | 474 | | | | | | | | | | | | | | | | | | | | | | Diluted earnings per common share ……… | $ | 31,224 | | | 60,504 | | | $ | 0.52 | |
| | | | | Three months ended September 30, 2010 | | | | | | | | | | Weighted | | | | | | | (In thousands, except per share data) | | Net Earnings | | Average Shares | | Per Share | | | | | | | | | | | | | | | | | Basic earnings per common share ………… | $ | 40,497 | | | 65,094 | | | $ | 0.62 | | | | Effect of dilutive stock options …………… | | — | | | 652 | | | | | | | | | | | | | | | | | | | | | | Diluted earnings per common share ……… | $ | 40,497 | | | 65,746 | | | $ | 0.62 | |
| | | | | Nine months ended September 30, 2011 | | | | | | | | | | Weighted | | | | | | | (In thousands, except per share data) | | Net Earnings | | Average Shares | | Per Share | | | | | | | | | | | | | | | | | Basic earnings per common share ………… | $ | 115,342 | | | 61,944 | | | $ | 1.86 | | | | Effect of dilutive stock options …………… | | — | | | 704 | | | | | | | | | | | | | | | | | | | | | | Diluted earnings per common share ……… | $ | 115,342 | | | 62,648 | | | $ | 1.84 | |
| | | | | Nine months ended September 30, 2010 | | | | | | | | | | Weighted | | | | | | | (In thousands, except per share data) | | Net Earnings | | Average Shares | | Per Share | | | | | | | | | | | | | | | | | Basic earnings per common share ………… | $ | 139,788 | | | 65,579 | | | $ | 2.13 | | | | Effect of dilutive stock options …………… | | — | | | 766 | | | | | | | | | | | | | | | | | | | | | | Diluted earnings per common share ……… | $ | 139,788 | | | 66,345 | | | $ | 2.11 | |
For the three months ended September 30, 2011 and 2010, the number of stock options that were outstanding but not included in the computation of diluted earnings per common share and, therefore anti-dilutive, were 1,297,560 and 2,366,676, respectively. For the nine months ended September 30, 2011 and 2010, the number of stock options that were outstanding but not included in the computation of diluted earnings per common share and, therefore anti-dilutive, were 577,742 and 2,044,471, respectively. |