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Earnings Per Share (Tables) | 9 Months Ended
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Sep. 30, 2018
Earnings Per Share [Abstract] |
Summary of Calculation of Basic and Diluted Earnings Per Share | A summary of the calculation of basic and diluted earnings per share for the three and nine months ended September 30, 2018 and 2017 is as follows:
|  | Three Months Ended |  |  | Nine Months Ended |
|  | September 30, |  |  | September 30, |
(In thousands, except per share amounts) |  | 2018 |  |  | 2017 |  |  | 2018 |  |  | 2017 |
Numerator |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income (loss) |  | $ | 7,589 |  |  | $ | 15,898 |  |  | $ | (10,895 | ) |  | $ | 34,950 |
Denominator |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted average number of shares – basic |  |  | 47,710 |  |  |  | 47,870 |  |  |  | 47,927 |  |  |  | 48,110 |
Effect of dilutive securities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock options |  |  | 27 |  |  |  | 487 |  |  |  | — |  |  |  | 385 |
PSUs, RSUs and restricted stock |  |  | 97 |  |  |  | 174 |  |  |  | — |  |  |  | 123 |
Weighted average number of shares – diluted |  |  | 47,834 |  |  |  | 48,531 |  |  |  | 47,927 |  |  |  | 48,618 |
Net income (loss) per share – basic |  | $ | 0.16 |  |  | $ | 0.33 |  |  | $ | (0.23 | ) |  | $ | 0.73 |
Net income (loss) per share – diluted |  | $ | 0.16 |  |  | $ | 0.33 |  |  | $ | (0.23 | ) |  | $ | 0.72 |

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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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