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Net Income (Loss) per Share (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2012 | Sep. 30, 2011 | Sep. 30, 2012 | Sep. 30, 2011
Numerator |  |  |  |
Net income (loss) - basic | $ (34,692) | $ (30,626) | $ 12,782 | $ (78,337)
Add: interest and issuance costs related to convertible notes |  |  | 4,503 |
Net income (loss) - diluted | $ (34,692) | $ (30,626) | $ 17,285 | $ (78,337)
Denominator |  |  |  |
Weighted-average common shares outstanding | 97,590 | 84,951 | 91,834 | 84,238
Less: unvested RSAs (in shares) | (2,563) | (2,461) | (2,563) | (2,461)
Weighted-average shares used in computing basic net income (loss) per share | 95,027 | 82,490 | 89,271 | 81,777
Effect of dilutive equity incentive plans and ESPP (in shares) |  |  | 2,442 |
Effect of dilutive convertible subordinated notes (in shares) |  |  | 6,668 |
Weighted-average common shares outstanding - diluted | 95,027 | 82,490 | 98,381 | 81,777
Securities that could potentially dilute basic EPS in the future |  |  |  |
Anti-dilutive securities (in shares) | 11,766 | 13,412 | 2,915 | 12,873
Equity Incentive Plans and ESPP |  |  |  |
Securities that could potentially dilute basic EPS in the future |  |  |  |
Anti-dilutive securities (in shares) | 5,098 | 6,744 | 2,915 | 6,205
Convertible subordinated notes |  |  |  |
Securities that could potentially dilute basic EPS in the future |  |  |  |
Anti-dilutive securities (in shares) | 6,668 | 6,668 |  | 6,668

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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-Publisher FASB -Name Emerging Issues Task Force (EITF) -Number 07-4 -Paragraph 4 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. 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 -Glossary Antidilution -URI http://asc.fasb.org/extlink&oid=6505113 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 128 -Paragraph 171 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 128 -Paragraph 40 -Subparagraph c -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 7: 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 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 128 -Paragraph 13, 14 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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