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Earnings Per Share (Tables) | 9 Months Ended
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Sep. 30, 2012
Schedule of Weighted-Average Number of Shares Outstanding | The following is a calculation of the basic and diluted weighted-average shares outstanding for the three and nine months ended September 30, 2012 and 2011:
|  | Three Months Ended September 30, |  |  | Nine Months Ended September 30, |
|  | 2012 |  |  | 2011 |  |  | 2012 |  |  | 2011 |
|  | (In thousands) |  |  | (In thousands) |
Basic weighted average common shares outstanding |  |  | 93,199 |  |  |  | 92,060 |  |  |  | 92,502 |  |  |  | 92,052 |
Dilution effect of stock awards at end of period |  |  | 240 |  |  |  | 104 |  |  |  | 182 |  |  |  | 156 |
Diluted weighted average common shares outstanding |  |  | 93,439 |  |  |  | 92,164 |  |  |  | 92,684 |  |  |  | 92,208 |
Anti-dilutive stock-based compensation awards |  |  | 748 |  |  |  | 281 |  |  |  | 541 |  |  |  | 174 |

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- Definition Tabular disclosure of the weighted average number of shares used in calculating basic net earnings per share (or unit) and diluted earnings per share (or unit). + 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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