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Earnings Per Share (Tables) | 9 Months Ended
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Sep. 30, 2013
Earnings Per Share [Abstract] |
Weighted Average Common Shares Outstanding | A reconciliation of the weighted average common shares outstanding used in the basic and diluted EPS calculation for the three and nine months ended September 30 was as follows (in thousands):
| Three Months |  | Nine Months
| 2013 |  | 2012 |  | 2013 |  | 2012
Weighted average common shares outstanding: |  |  |  |  |  |  |
Basic EPS calculation | 110,783 |  |  | 110,768 |  |  | 110,775 |  |  | 110,747 |
Effect of dilutive share-based awards | 2 |  |  | 11 |  |  | 5 |  |  | 16 |
Diluted EPS calculation | 110,785 |  |  | 110,779 |  |  | 110,780 |  |  | 110,763 |

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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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