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Loss Per Common Share (Tables) | 9 Months Ended
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Sep. 30, 2018
Earnings Per Share [Abstract] |
Loss Per Common Share | Summarized basic and diluted earnings per common share were calculated as follows:
| Three Months Ended September 30, |  | Nine Months Ended September 30,
(in thousands, except per share data) | 2018 |  | 2017 |  | 2018 |  | 2017
Numerator: |  |  |  |  |  |  |
Net earnings (loss) | $ | 12,918 |  |  | $ | (12,599 | ) |  | $ | 6,828 |  |  | $ | (28,171 | )
Denominator: |  |  |  |  |  |  |
Weighted-average shares outstanding | 53,508 |  |  | 53,306 |  |  | 53,455 |  |  | 53,272 |
Effect of dilutive stock awards(1) | 1,404 |  |  | — |  |  | 946 |  |  | — |
Weighted-average dilutive shares | 54,912 |  |  | 53,306 |  |  | 54,401 |  |  | 53,272 |
Basic earnings (loss) per common share | $ | 0.24 |  |  | $ | (0.24 | ) |  | $ | 0.13 |  |  | $ | (0.53 | )
Diluted earnings (loss) per common share | $ | 0.24 |  |  | $ | (0.24 | ) |  | $ | 0.13 |  |  | $ | (0.53 | )
Anti-dilutive securities excluded from diluted loss per common share: |  |  |  |  |  |  |
Anti-dilutive restricted share units | — |  |  | 635 |  |  | — |  |  | 635 |
Anti-dilutive performance share units | 211 |  |  | 784 |  |  | 211 |  |  | 784 |
Anti-dilutive stock options | 1,417 |  |  | 3,103 |  |  | 1,672 |  |  | 3,103 |
(1) | There was no dilutive effect to the loss per common share for the three and nine months ended September 30, 2017 due to the net loss incurred for respective periods.

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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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