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EARNINGS PER SHARE (Tables) | 12 Months Ended
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Dec. 31, 2020
EARNINGS PER SHARE |
Schedule of Weighted Average Number of Shares | Following are the factors used in the earnings per share computations: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
(dollars in thousand except share and per share data) |  | 2020 |  | 2019 |  | 2018
Basic earnings per common share: |  | ​ |  |  | ​ |  |  | ​ |
Net income | ​ | $ | 84,337 | ​ | $ | 87,047 | ​ | $ | 80,411
Weighted-average common shares outstanding | ​ |  | 25,469,242 | ​ |  | 25,588,404 | ​ |  | 25,288,533
Basic earnings per common share | ​ | $ | 3.31 | ​ | $ | 3.40 | ​ | $ | 3.18
Diluted earnings per common share: | ​ |  |  | ​ |  |  | ​ |  |
Net income | ​ | $ | 84,337 | ​ | $ | 87,047 | ​ | $ | 80,411
Weighted-average common shares outstanding for basic earnings per common share | ​ |  | 25,469,242 | ​ |  | 25,588,404 | ​ |  | 25,288,533
Add: Dilutive effect of assumed exercise of warrant | ​ |  | — | ​ |  | — | ​ |  | 225,831
Add: Dilutive effect of assumed exercises of stock options and awards | ​ |  | 104,699 | ​ |  | 170,489 | ​ |  | 213,467
Average shares and dilutive potential common shares | ​ |  | 25,573,941 | ​ |  | 25,758,893 | ​ |  | 25,727,831
Diluted earnings per common share | ​ | $ | 3.30 | ​ | $ | 3.38 | ​ | $ | 3.13
​

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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/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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