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Earnings Per Share (Tables) | 6 Months Ended
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Jun. 30, 2018
Earnings Per Share [Abstract] |
Computation of Basic and Diluted Earnings Per Common Share | The shares used in the computation of the company’s basic and diluted earnings per common share are as follows:
| Three Months Ended |  | Six Months Ended
| June 30, 2018 |  | July 1, 2017 |  | June 30, 2018 |  | July 1, 2017
Weighted-average common shares outstanding | 56,429,715 |  |  | 57,790,299 |  |  | 56,540,611 |  |  | 57,865,481 |
Effect of dilutive securities | 912,347 |  |  | 1,223,560 |  |  | 1,013,034 |  |  | 1,303,683 |
Weighted-average common shares outstanding, assuming dilution | 57,342,062 |  |  | 59,013,859 |  |  | 57,553,645 |  |  | 59,169,164 |

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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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