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Earnings Per Share (Tables) | 6 Months Ended
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Jun. 30, 2013
Earnings Per Share [Abstract] |
Reconciliation of Weighted Average Number of Shares of Common Stock Outstanding | Below is a reconciliation of the weighted average number of shares of common stock outstanding in calculating diluted earnings per share (in thousands, except for per share information):
|  | Three months ended June 30, |  |  | Six months ended June 30, |
|  | 2013 |  |  | 2012 |  |  | 2013 |  |  | 2012 |
Numerator: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income attributable to TripAdvisor |  | $ | 66,988 |  |  | $ | 53,019 |  |  | $ | 129,287 |  |  | $ | 101,130 |
Denominator: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted average shares used to compute Basic EPS |  |  | 143,531 |  |  |  | 139,278 |  |  |  | 143,297 |  |  |  | 136,516 |
Weighted average effect of dilutive securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock options |  |  | 1,940 |  |  |  | 1,394 |  |  |  | 1,671 |  |  |  | 1,263 |
RSUs |  |  | 193 |  |  |  | 100 |  |  |  | 192 |  |  |  | 147 |
Stock warrants |  |  | — |  |  |  | 965 |  |  |  | — |  |  |  | 1,021 |
Weighted average shares used to compute Diluted EPS |  |  | 145,664 |  |  |  | 141,737 |  |  |  | 145,160 |  |  |  | 138,947 |
Basic EPS |  | $ | 0.47 |  |  | $ | 0.38 |  |  | $ | 0.90 |  |  | $ | 0.74 |
Diluted EPS |  | $ | 0.46 |  |  | $ | 0.37 |  |  | $ | 0.89 |  |  | $ | 0.73 |
Common Shares Related to Stock Options and RSUs Excluded from Calculated Diluted Net Income Per Share | The following potential common shares related to stock options and RSUs were excluded from the calculation of diluted net income per share because their effect would have been anti-dilutive for the periods presented (in thousands):
|  | Three Months Ended June 30, |  |  | Six Months Ended June 30, |
|  | 2013 (1) |  |  | 2012 (2) |  |  | 2013 (1) |  |  | 2012 (2) |
Stock options |  |  | 1,741 |  |  |  | 3,901 |  |  |  | 3,159 |  |  |  | 2,861 |
RSUs |  |  | 48 |  |  |  | — |  |  |  | 24 |  |  |  | 30 |
Total |  |  | 1,789 |  |  |  | 3,901 |  |  |  | 3,183 |  |  |  | 2,891 |
(1) | These totals do not include 210,000 performance based options and 44,000 performance based RSUs representing the right to acquire 254,000 shares of common stock for which all targets required to trigger vesting have not been achieved as of June 30, 2013; therefore, such awards were excluded from the calculation of weighted average shares used to compute diluted earnings per share for those reporting periods.
(2) | These totals do not include performance based RSUs representing the right to acquire 400,000 shares of common stock for which all targets required to trigger vesting had not been achieved as of June 30, 2012; therefore, such awards were excluded from the calculation of weighted average shares used to compute diluted earnings per share for those reporting periods.

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- Definition Tabular disclosure of securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) in the future that were not included in the computation of diluted EPS because to do so would increase EPS amounts or decrease loss per share amounts for the period presented, by antidilutive securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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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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