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Earnings Per Share (Tables) | 12 Months Ended
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Dec. 31, 2016
Earnings Per Share [Abstract] |
Reconciliation Of Earnings Per Share Basic And Diluted | The following table sets forth the computation of basic and diluted earnings per share from continuing operations for the years ended December 31 (in thousands except per share amounts):
|  | 2016 |  | 2015 |  | 2014
Numerator: |  |  |  |  |  |
Income used in computing basic and diluted earnings per share |  | $ | 692,164 |  |  | $ | 752,207 |  |  | $ | 844,611 |
Denominator: |  |  |  |  |  |
Denominator for basic earnings per share-weighted-average common shares |  | 179,676 |  |  | 202,681 |  |  | 216,305 |
Effect of dilutive securities – employee stock compensation plan |  | 859 |  |  | 1,005 |  |  | 1,401 |
Denominator for diluted earnings per share- adjusted weighted-average shares outstanding |  | 180,535 |  |  | 203,686 |  |  | 217,706 |
Earnings per common share: |  |  |  |  |  |
Basic |  | $ | 3.85 |  |  | $ | 3.71 |  |  | $ | 3.90 |
Diluted |  | $ | 3.83 |  |  | $ | 3.69 |  |  | $ | 3.88 |

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + 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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