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Net Income Per Share (Tables) | 3 Months Ended
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Mar. 31, 2019
Earnings Per Share [Abstract] |
Net Income Per Share | The following table sets forth the computation of basic and diluted net income per share:
|  | Three months ended
|  | March 31, 2019 |  | March 31, 2018
Numerator: |  |  |  |
Net income and comprehensive income |  | $ | 18,407 |  |  | $ | 17,741 |
Income allocated to participating securities |  | (208 | ) |  | (145 | )
Numerator for basic and diluted income per share - net income |  | $ | 18,199 |  |  | $ | 17,596 |
Denominator (in thousands): |  |  |  |  |  |
Denominator for basic income per share - weighted-average shares |  | 28,530 |  |  | 29,375 |
Effect of dilutive stock options |  | 76 |  |  | 70 |
Effect of dilutive performance shares |  | 42 |  |  | 35 |
Denominator for diluted income per share - adjusted weighted-average shares |  | 28,648 |  |  | 29,480 |
Basic net income per share |  | $ | 0.64 |  |  | $ | 0.60 |
Diluted net income per share |  | $ | 0.64 |  |  | $ | 0.60 |
The number of instruments that could potentially dilute net income per basic share in the future, but that were not included in the computation of net income per diluted share because to do so would have been anti-dilutive for the periods presented, are as follows:
| March 31, 2019 |  | March 31, 2018
Anti-dilutive stock options (in thousands) | 195 |  |  | 67 |
Anti-dilutive performance shares (in thousands) | 8 |  |  | 11 |
Anti-dilutive non-vested shares and deferred stock units (in thousands) | — |  |  | 9 |
Total anti-dilutive shares (in thousands) | 203 |  |  | 87 |

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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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