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Net income (loss) per share (Tables) | 9 Months Ended
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Sep. 30, 2016
Earnings Per Share [Abstract] |
Schedule of Net Income per Share, Basic and Diluted | The following table presents the calculations of basic and diluted net income (loss) per share:
| Three months ended |  | Nine months ended
(in thousands, except per share data) | September 30, 2016 |  | September 30, 2015 |  | September 30, 2016 |  | September 30, 2015
Numerator: |  |  |  |  |  |  |
Net income (loss) | $ | (104,068 | ) |  | $ | 18,799 |  |  | $ | (303,294 | ) |  | $ | 70,582 |
Denominator: |  |  |  |  |  |  |
Weighted-average common shares—basic for Class A and Class B common stock | 140,124 |  |  | 135,800 |  |  | 138,875 |  |  | 133,755 |
Effect of potentially dilutive shares | — |  |  | 10,255 |  |  | — |  |  | 13,446 |
Weighted-average common shares—diluted for Class A and Class B common stock | 140,124 |  |  | 146,055 |  |  | 138,875 |  |  | 147,201 |
Net income (loss) per share: |  |  |  |  |  |  |
Basic | $ | (0.74 | ) |  | $ | 0.14 |  |  | $ | (2.18 | ) |  | $ | 0.53 |
Diluted | $ | (0.74 | ) |  | $ | 0.13 |  |  | $ | (2.18 | ) |  | $ | 0.48 |
Schedule of Antidilutive Securities Excluded from Computation of Net Income per Share | The following potentially dilutive shares were not included in the calculation of diluted shares outstanding as the effect would have been anti-dilutive:
| Three months ended |  | Nine months ended
(in thousands) | September 30, 2016 |  | September 30, 2015 |  | September 30, 2016 |  | September 30, 2015
Stock options, ESPP shares and RSUs | 22,693 |  |  | 2,373 |  |  | 20,803 |  |  | 1,995 |

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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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