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Net income (loss) per share | 9 Months Ended
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Sep. 30, 2016
Earnings Per Share [Abstract] |
Net income (loss) per share | Net income (loss) per share Basic net income (loss) per share is computed by dividing the net income (loss) by the weighted-average number of common shares outstanding during the period. Diluted net income (loss) per share is computed by dividing net income (loss) by the weighted-average number of common shares outstanding, including all potentially dilutive common shares. The rights of the holders of Class A common stock and Class B common stock are identical, except with respect to voting and conversion. Each share of Class A common stock is entitled to one vote per share and each share of Class B common stock is entitled to ten votes per share. Each share of Class B common stock is convertible at any time at the option of the stockholder into one share of Class A common stock and has no expiration date. Each share of Class B common stock will convert automatically into one share of Class A common stock upon the date when the outstanding shares of Class B common stock represent less than 10% of the aggregate number of shares of common stock then outstanding. Class A common stock is not convertible into Class B common stock. The computation of the diluted net income (loss) per share of Class A common stock assumes the conversion of Class B common stock. 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 |
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 The entire disclosure for earnings per share. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=64863997&loc=d3e1278-109256 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=64863997&loc=d3e1252-109256 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 55 -Paragraph 52 -URI http://asc.fasb.org/extlink&oid=65016374&loc=d3e4984-109258 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.21) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
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