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Common and Common Equivalent Shares (Tables) | 3 Months Ended
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Mar. 31, 2019
Earnings Per Share [Abstract] |
Schedule of Calculation of Shares Used in Basic and Diluted Net Income Per Share |
|  | Three Months Ended March 31, |
|  | 2019 |  |  | 2018 |
Weighted average number of common shares outstanding |  |  | 86,073 |  |  |  | 92,859 |
Weighted average number of dilutive common share equivalents |  |  | 472 |  |  |  | 646 |
Weighted average number of common and common equivalent shares outstanding |  |  | 86,545 |  |  |  | 93,505 |
Antidilutive securities not included in the diluted net income per common share calculation |  |  | 504 |  |  |  | 1 |

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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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