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Net Income Per Share (Tables) | 9 Months Ended
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Sep. 30, 2014
Earnings Per Share [Abstract] |
Computation of Basic and Diluted Net Income Per Share | The following table sets forth the computation of basic and diluted net income per share:
|  | Three Months Ended September 30, |  |  | Nine Months Ended September 30, |
|  | 2014 |  |  | 2013 |  |  | 2014 |  |  | 2013 |
Numerator: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income |  | $ | 29,117 |  |  | $ | 2,458 |  |  | $ | 81,586 |  |  | $ | 15,539 |
Denominator: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shares used in net income per common share – basic |  |  | 53,054,000 |  |  |  | 53,165,000 |  |  |  | 53,276,000 |  |  |  | 52,998,000 |
Effect of dilutive securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock options, restricted stock and employee stock purchase plan |  |  | 256,000 |  |  |  | 348,000 |  |  |  | 265,000 |  |  |  | 412,000 |
Shares used in net income per common share – diluted |  |  | 53,310,000 |  |  |  | 53,513,000 |  |  |  | 53,541,000 |  |  |  | 53,410,000 |
Net income per common share: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic |  | $ | 0.55 |  |  | $ | 0.05 |  |  | $ | 1.53 |  |  | $ | 0.29 |
Diluted |  | $ | 0.55 |  |  | $ | 0.05 |  |  | $ | 1.52 |  |  | $ | 0.29 |

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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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