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Earnings Per Share (Tables) | 12 Months Ended
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Dec. 31, 2018
Earnings Per Share [Abstract] |
Schedule of Weighted Average Number of Shares | The computation of diluted average common shares is as follows:
Year Ended December 31, (in thousands) | 2017 |  | 2016
Denominator |  |  |
Basic average common shares outstanding | 329,388 |  |  | 321,805 |
Dilutive potential common shares: |  |  |
Shares contingently issuable under employee stock plans | 547 |  |  | 165 |
Shares restricted under stock plans | 821 |  |  | 1,554 |
Diluted Average Common Shares | 330,756 |  |  | 323,524 |

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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://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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