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Earnings Per Share Data (Tables) | 6 Months Ended
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Jul. 02, 2016
Schedule of Earnings Per Share, Basic and Diluted | The following table sets forth the computation of basic and diluted earnings per share data:
|  | Three Months Ended |  |  | Six Months Ended |
|  | July 2, |  |  | July 4, |  |  | July 2, |  |  | July 4, |
|  | 2016 |  |  | 2015 |  |  | 2016 |  |  | 2015 |
Numerator: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income attributable to |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weight Watchers International, Inc. |  | $ | 30,494 |  |  | $ | 27,877 |  |  | $ | 19,741 |  |  | $ | 22,444 |
Denominator: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted average shares of common stock outstanding |  |  | 63,740 |  |  |  | 57,085 |  |  |  | 63,644 |  |  |  | 56,946 |
Effect of dilutive common stock equivalents |  |  | 2,194 |  |  |  | 70 |  |  |  | 2,246 |  |  |  | 89 |
Weighted average diluted common shares outstanding |  |  | 65,934 |  |  |  | 57,155 |  |  |  | 65,890 |  |  |  | 57,035 |
Net income per share attributable to Weight Watchers International, Inc. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic |  | $ | 0.48 |  |  | $ | 0.49 |  |  | $ | 0.31 |  |  | $ | 0.39 |
Diluted |  | $ | 0.46 |  |  | $ | 0.49 |  |  | $ | 0.30 |  |  | $ | 0.39 |

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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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