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Net Income Per Share (Tables) | 3 Months Ended
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Mar. 31, 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
| March 31, 2015 |  | March 31, 2014
| (In thousands, except per share data)
Net income | $ | 6,318 |  |  | $ | 6,194 |
Weighted-average shares outstanding — basic | 36,024 |  |  | 35,225 |
Add: Dilutive effect of employee stock plans | 890 |  |  | 1,080 |
Weighted-average shares outstanding — diluted | 36,914 |  |  | 36,305 |
Net income per share — basic | $ | 0.18 |  |  | $ | 0.18 |
Net income per share — diluted | $ | 0.17 |  |  | $ | 0.17 |
Anti-dilutive weighted-average shares related to stock award plans | 484 |  |  | 347 |

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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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