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Net Income per Share (Tables) | 3 Months Ended
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Mar. 31, 2018
Earnings Per Share [Abstract] |
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] | The following table presents the computation of net income per share on a basic and diluted basis (shares in thousands):
|  | Quarter Ended
|  | March 31, 2018 |  | April 1, 2017
Net income attributable to shareholders |  | $ | 139,094 |  |  | $ | 114,737 |
Weighted-average shares outstanding - basic |  | 87,955 |  |  | 89,262 |
Net effect of various dilutive stock-based compensation awards |  | 1,080 |  |  | 1,279 |
Weighted-average shares outstanding - diluted |  | 89,035 |  |  | 90,541 |
Net income per share: |  |  |  |  |  |
Basic |  | $ | 1.58 |  |  | $ | 1.29 |
Diluted (a) |  | $ | 1.56 |  |  | $ | 1.27 |
(a) | Stock-based compensation awards for the issuance of 415 and 244 for the first quarter of 2018 and 2017, respectively, were excluded from the computation of net income per share on a diluted basis as their effect was anti-dilutive.

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + 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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