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EARNINGS PER SHARE | 12 Months Ended
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Dec. 31, 2020
EARNINGS PER SHARE. |
EARNINGS PER SHARE | 16. EARNINGS PER SHARE FASB ASC 260-10-45 addresses whether instruments granted in share-based payment transactions are participating securities prior to vesting and, therefore, need to be included in the earnings allocation in computing EPS. The RSAs and certain RSUs granted by the Company contain non-forfeitable rights to dividends and therefore are considered participating securities. The two-class method for calculating basic EPS excludes dividends paid to participating securities and any undistributed earnings attributable to participating securities. The following table presents the computation of EPS for the years ended December 31, 2020, 2019 and 2018: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year Ended December 31,
(In thousands, except per share data) |  | 2020 |  | 2019 |  | 2018
Net income | ​ | $ | 42,042 | ​ | $ | 51,691 | ​ | $ | 39,227
Dividends paid on and earnings allocated to participating securities | ​ |  | (872) |  |  | (1,096) |  |  | (853)
Income attributable to common stock | ​ | $ | 41,170 | ​ | $ | 50,595 | ​ | $ | 38,374
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Weighted average common shares outstanding, including participating securities | ​ |  | 19,903 |  |  | 19,952 |  |  | 19,875
Weighted average participating securities | ​ |  | (409) |  |  | (424) |  |  | (434)
Weighted average common shares outstanding | ​ |  | 19,494 |  |  | 19,528 | ​ |  | 19,441
Basic earnings per common share | ​ | $ | 2.11 | ​ | $ | 2.59 | ​ | $ | 1.97
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Income attributable to common stock | ​ | $ | 41,170 | ​ | $ | 50,595 | ​ | $ | 38,374
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Weighted average common shares outstanding | ​ |  | 19,494 |  |  | 19,528 | ​ |  | 19,441
Incremental shares from assumed conversions of options and restricted stock units | ​ |  | 55 |  |  | 31 |  |  | 27
Weighted average common and equivalent shares outstanding | ​ |  | 19,549 |  |  | 19,559 | ​ |  | 19,468
Diluted earnings per common share | ​ | $ | 2.11 | ​ | $ | 2.59 | ​ | $ | 1.97
​ There were 180,020, 110,660 and 47,393 stock options outstanding at December 31, 2020, 2019 and 2018, respectively, that were not included in the computation of diluted earnings per share for the years ended December 31, 2020, 2019 and 2018 because the options’ exercise prices were greater than the average market price of common stock and were, therefore, antidilutive. ​ There were 8,941 RSUs that were antidilutive for the year ended December 31, 2020. There were no RSUs that were antidilutive for the year ended December 31, 2019. There were 3,156 RSUs that were antidilutive for the year ended December 31, 2018.

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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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