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(Loss) Earnings Per Share (Tables) | 3 Months Ended
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Mar. 30, 2019
Earnings Per Share [Abstract] |
Schedule of (Loss) Earnings Per Share, Basic and Diluted | The following table sets forth the computation of basic and diluted (loss) earnings per share:
|  | Three Months Ended |
|  | March 30, |  |  | March 31, |
|  | 2019 |  |  | 2018 |
Numerator: |  |  |  |  |  |  |  |
Net (loss) income attributable to |  |  |  |  |  |  |  |
Weight Watchers International, Inc. |  | $ | (10,687 | ) |  | $ | 39,112 |
Denominator: |  |  |  |  |  |  |  |
Weighted average shares of common stock outstanding |  |  | 66,964 |  |  |  | 65,123 |
Effect of dilutive common stock equivalents |  |  | — |  |  |  | 4,378 |
Weighted average diluted common shares outstanding |  |  | 66,964 |  |  |  | 69,501 |
(Loss) earnings per share attributable to Weight Watchers International, Inc. |  |  |  |  |  |  |  |
Basic |  | $ | (0.16 | ) |  | $ | 0.60 |
Diluted |  | $ | (0.16 | ) |  | $ | 0.56 |

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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://fasb.org/us-gaap/role/ref/legacyRef -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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