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Earnings Per Share (Tables) | 12 Months Ended
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Dec. 31, 2018
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):
|  | 2018 |  | 2017 |  | 2016
Numerator: |  |  |  |  |  |
Income used in computing basic and diluted earnings per share |  | $ | 531,451 |  |  | $ | 521,759 |  |  | $ | 692,164 |
Denominator: |  |  |  |  |  |
Denominator for basic earnings per share - weighted-average common shares |  | 165,672 |  |  | 171,995 |  |  | 179,676 |
Effect of dilutive securities – employee stock compensation plan |  | 832 |  |  | 937 |  |  | 859 |
Denominator for diluted earnings per share - adjusted weighted-average shares outstanding |  | 166,504 |  |  | 172,932 |  |  | 180,535 |
Earnings per common share: |  |  |  |  |  |
Basic |  | $ | 3.21 |  |  | $ | 3.03 |  |  | $ | 3.85 |
Diluted |  | $ | 3.19 |  |  | $ | 3.02 |  |  | $ | 3.83 |

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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://fasb.org/us-gaap/role/ref/legacyRef -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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