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Earnings Per Share | 6 Months Ended
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Jun. 30, 2018
Earnings Per Share [Abstract] |
Earnings Per Share | Earnings Per 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 |
The dilutive effect of the potential exercise of outstanding options and stock-settled SARs to purchase common shares is calculated using the treasury stock method. As of June 30, 2018, there were 1,295,441 awards outstanding that were anti-dilutive; as of July 1, 2017, there were 722,015 awards outstanding that were anti-dilutive. Performance-based equity awards are included in the diluted earnings per share calculation based on the attainment of the applicable performance metrics to date.

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- Definition The entire disclosure for earnings per share. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -URI http://asc.fasb.org/topic&trid=2144383 + Details
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