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Net Income Per Share (Tables) | 12 Months Ended
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Dec. 31, 2018
Earnings Per Share [Abstract] |
Basic and Diluted Net Income Per Share | The basic and diluted net income per share calculation for the years ended December 31, 2018, December 31, 2017, and December 31, 2016 was as follows:
| Year Ended December 31,
| 2018 |  | 2017 |  | 2016
| (In thousands, except per share data)
Net income | $ | 37,729 |  |  | $ | 30,518 |  |  | $ | 9,756 |
Weighted-average shares outstanding — basic | 39,242 |  |  | 37,483 |  |  | 36,156 |
Effect of dilutive securities from stock award plans | 1,317 |  |  | 1,229 |  |  | 708 |
Weighted-average shares outstanding — diluted | 40,559 |  |  | 38,712 |  |  | 36,864 |
Net income per share - basic | $ | 0.96 |  |  | $ | 0.81 |  |  | $ | 0.27 |
Net income per share - diluted | $ | 0.93 |  |  | $ | 0.79 |  |  | $ | 0.26 |
Anti-dilutive weighted-average shares related to stock award plans | 1,279 |  |  | 501 |  |  | 1,345 |

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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://fasb.org/us-gaap/role/ref/legacyRef -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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