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Weighted-Average Shares | 9 Months Ended
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Oct. 01, 2017
Earnings Per Share [Abstract] |
Weighted-Average Shares | Weighted-Average Shares Weighted-average shares were calculated as follows (in thousands):
| Three-months Ended |  | Nine-months Ended
| October 1, 2017 |  | October 2, 2016 |  | October 1, 2017 |  | October 2, 2016
Basic weighted-average common shares outstanding | 86,617 |  |  | 85,460 |  |  | 86,526 |  |  | 85,167 |
Effect of dilutive stock options | 3,060 |  |  | 1,886 |  |  | 3,036 |  |  | 1,638 |
Weighted-average common and common-equivalent shares outstanding | 89,677 |  |  | 87,346 |  |  | 89,562 |  |  | 86,805 |
Stock options to purchase 233,081 and 1,554,129 shares of common stock, on a weighted-average basis, were outstanding during the three-month and nine-month periods ended October 1, 2017, respectively, and 491,375 and 3,641,279 for the same periods in 2016, but were not included in the calculation of dilutive net income per share because they were anti-dilutive.

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