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Net Income (Loss) Per Share (Tables) | 9 Months Ended
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Sep. 30, 2016
Earnings Per Share [Abstract] |
Basic and Diluted Net Income Per Share | The calculation of basic and diluted net income per share is as follows:
| Three months ended September 30, |  | Nine months ended September 30,
| 2016 |  | 2015 |  | 2016 |  | 2015
| (In thousands, except per share data)
Net income | $ | 1,983 |  |  | $ | 8,036 |  |  | $ | 446 |  |  | $ | 23,105 |
Weighted-average shares outstanding — basic | 36,332 |  |  | 35,806 |  |  | 36,020 |  |  | 35,983 |
Effect of dilutive securities from stock award plans | 747 |  |  | 807 |  |  | 675 |  |  | 887 |
Weighted-average shares outstanding — diluted | $ | 37,079 |  |  | $ | 36,613 |  |  | $ | 36,695 |  |  | $ | 36,870 |
Net income per share — basic | $ | 0.05 |  |  | $ | 0.22 |  |  | $ | 0.01 |  |  | $ | 0.64 |
Net income per share — diluted | $ | 0.05 |  |  | $ | 0.22 |  |  | $ | 0.01 |  |  | $ | 0.63 |
Anti-dilutive weighted-average shares related to stock award plans | 326 |  |  | 478 |  |  | 1,255 |  |  | 380 |

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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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