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(LOSS) EARNINGS PER SHARE | 12 Months Ended
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Dec. 31, 2020
Earnings Per Share [Abstract] |
(LOSS) EARNINGS PER SHARE | 17. (LOSS) EARNINGS PER SHARE Basic earnings per share is calculated using the weighted-average number of common shares outstanding during the applicable period. Diluted earnings per share is calculated using the weighted-average number of common shares outstanding during the applicable period, plus the dilutive effect of outstanding stock options and RSUs, using the treasury stock method. In periods of loss, all stock options and RSUs are excluded from the weighted-average number of common shares, as their inclusion would be anti-dilutive.
(in thousands, except per share amounts) | 2020 |  | 2019 |  | 2018
Net (loss) income | $ | (61,373) |  |  | $ | (90,433) |  |  | $ | 10,617 |
Weighted-average common shares outstanding | 80,336 |  |  | 79,055 |  |  | 78,564 |
(Loss) earnings per share, basic | $ | (0.76) |  |  | $ | (1.14) |  |  | $ | 0.14 |
Net (loss) income | $ | (61,373) |  |  | $ | (90,433) |  |  | $ | 10,617 |
Stock options | — |  |  | — |  |  | 2,891 |
RSUs | — |  |  | — |  |  | 1,609 |
Effect of dilutive securities | — |  |  | — |  |  | 4,500 |
Weighted-average common shares outstanding, assuming dilution | 80,336 |  |  | 79,055 |  |  | 83,064 |
(Loss) earnings per share, diluted | $ | (0.76) |  |  | $ | (1.14) |  |  | $ | 0.13 |
Outstanding anti-dilutive stock options and RSUs (1) | 6,278 |  |  | 5,911 |  |  | 188 |
(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 The entire disclosure for earnings per share. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=109243012&loc=SL65017193-207537 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -URI http://asc.fasb.org/topic&trid=2144383 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3630-109257 + Details
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