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Net Income Per Share Available Loss Attributable To Common Stockholders - Summary of Outstanding Shares of Common Stock Equivalents (Details) - shares shares in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2015 | Sep. 30, 2014 | Sep. 30, 2015 | Sep. 30, 2014
Earnings Per Share Diluted [Line Items] |  |  |  |
Anti-dilutive securities excluded from computation of diluted net income per share | 15,581 | 10,679 | 14,571 | 10,485
Stock Options to Purchase Common Stock |  |  |  |
Earnings Per Share Diluted [Line Items] |  |  |  |
Anti-dilutive securities excluded from computation of diluted net income per share | 15,511 | 10,435 | 14,501 | 10,241
Common Stock Subject to Repurchase |  |  |  |
Earnings Per Share Diluted [Line Items] |  |  |  |
Anti-dilutive securities excluded from computation of diluted net income per share | 70 | 244 | 70 | 244

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- Definition Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Antidilution -URI http://asc.fasb.org/extlink&oid=6505113 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Diluted Earnings Per Share -URI http://asc.fasb.org/extlink&oid=6510752 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Contingent Stock Agreement -URI http://asc.fasb.org/extlink&oid=6508534 Reference 4: 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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