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Net Income Per Share (Tables) | 9 Months Ended
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Sep. 30, 2015
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,
| 2015 |  | 2014 | 2015 |  | 2014
| (In thousands, except per share data)
Net income | $ | 8,036 |  |  | $ | 7,300 |  | $ | 23,105 |  |  | $ | 21,282 |
Weighted-average shares outstanding — basic | 35,806 |  |  | 35,994 |  | 35,983 |  |  | 35,634 |
Dilutive effect of employee stock plans | 807 |  |  | 838 |  | 887 |  |  | 983 |
Weighted-average shares outstanding — diluted | 36,613 |  |  | 36,832 |  | 36,870 |  |  | 36,617 |
Net income per share — basic | $ | 0.22 |  |  | $ | 0.20 |  | $ | 0.64 |  |  | $ | 0.60 |
Net income per share — diluted | $ | 0.22 |  |  | $ | 0.20 |  | $ | 0.63 |  |  | $ | 0.58 |
Anti-dilutive weighted-average shares related to stock award plans | 478 |  |  | 427 |  | 380 |  |  | 364 |

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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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