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Earnings 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 | The following table sets forth the computation of basic and diluted EPS:
|  | Three Months Ended |
|  | March 31, |  |  | April 1, |
|  | 2018 |  |  | 2017 |
Numerator: |  |  |  |  |  |  |  |
Net income attributable to |  |  |  |  |  |  |  |
Weight Watchers International, Inc. |  | $ | 39,112 |  |  | $ | 10,653 |
Denominator: |  |  |  |  |  |  |  |
Weighted average shares of common stock outstanding |  |  | 65,123 |  |  |  | 63,978 |
Effect of dilutive common stock equivalents |  |  | 4,378 |  |  |  | 2,549 |
Weighted average diluted common shares outstanding |  |  | 69,501 |  |  |  | 66,527 |
Earnings per share attributable to Weight Watchers International, Inc. |  |  |  |  |  |  |  |
Basic |  | $ | 0.60 |  |  | $ | 0.17 |
Diluted |  | $ | 0.56 |  |  | $ | 0.16 |

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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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