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Weighted-Average Shares | 3 Months Ended
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Apr. 01, 2018
Earnings Per Share [Abstract] |
Weighted-Average Shares | Weighted-Average Shares Weighted-average shares were calculated as follows (in thousands):
| Three-months Ended
| April 1, 2018 |  | April 2, 2017
Basic weighted-average common shares outstanding | 173,280 |  |  | 172,646 |
Effect of dilutive stock options | 6,361 |  |  | 5,708 |
Weighted-average common and common-equivalent shares outstanding | 179,641 |  |  | 178,354 |
Stock options to purchase 1,339,000 and 1,648,000 shares of common stock, on a weighted-average basis, were outstanding during the three-month periods ended April 1, 2018 and April 2, 2017, respectively, but were not included in the calculation of dilutive net income per share because they were anti-dilutive.

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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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