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EARNINGS PER SHARE (Tables) | 12 Months Ended
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Dec. 31, 2018
Earnings Per Share [Abstract] |
Summary of Basic and Diluted Earnings Per Share |
(in thousands, except per share amounts) | 2018 |  | 2017 |  | 2016
Basic |  |  |  |  |
Net income | $ | 10,617 |  |  | $ | 98,548 |  |  | $ | 45,015 |
Weighted-average common shares outstanding | 78,564 |  |  | 77,431 |  |  | 76,343 |
Earnings per share, basic | $ | 0.14 |  |  | $ | 1.27 |  |  | $ | 0.59 |
Diluted |  |  |  |  |
Net income | $ | 10,617 |  |  | $ | 98,548 |  |  | $ | 45,015 |
Weighted-average effect of dilutive securities: |  |  |  |  |
Stock options | 2,891 |  |  | 3,471 |  |  | 2,025 |
RSUs | 1,609 |  |  | 1,930 |  |  | 1,364 |
Effect of dilutive securities | 4,500 |  |  | 5,401 |  |  | 3,389 |
Weighted-average common shares outstanding, assuming dilution | 83,064 |  |  | 82,832 |  |  | 79,732 |
Earnings per share, diluted | $ | 0.13 |  |  | $ | 1.19 |  |  | $ | 0.56 |
Outstanding anti-dilutive stock options and RSUs (1) | 188 |  |  | 221 |  |  | 322 |
(1) Certain outstanding stock options and RSUs were excluded from the computation of diluted earnings per share because they were anti-dilutive in the period presented. These awards may be dilutive in the future.

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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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