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EARNINGS PER COMMON SHARE (Tables) | 9 Months Ended
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Sep. 30, 2022
EARNINGS PER COMMON SHARE |
Schedule of calculation of basic and diluted earnings per common share | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended | ​ | Nine Months Ended
​ | ​ | September 30, | ​ | September 30,
​ |  | 2022 |  | 2021 |  | 2022 |  | 2021
Net income | ​ | $ | 15,371 | ​ | $ | 9,304 | ​ | $ | 33,838 | ​ | $ | 22,225
Allocation of earnings to participating securities | ​ |  | (294) | ​ |  | (456) | ​ |  | (1,114) | ​ |  | (909)
Net income attributable to common stockholders | ​ | $ | 15,077 | ​ | $ | 8,848 | ​ | $ | 32,724 | ​ | $ | 21,316
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Weighted average common shares outstanding used in basic earnings per common share | ​ | ​ | 153,550 | ​ | ​ | 152,158 | ​ | ​ | 153,168 | ​ | ​ | 151,615
Effect of dilutive securities: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Restricted stock units | ​ | ​ | 131 | ​ | ​ | 138 | ​ | ​ | 125 | ​ | ​ | 152
ESPP shares | ​ | ​ | 6 | ​ | ​ | 1 | ​ | ​ | 4 | ​ | ​ | 2
Weighted average common shares outstanding used in diluted earnings per common share | ​ | ​ | 153,687 | ​ | ​ | 152,297 | ​ | ​ | 153,297 | ​ | ​ | 151,769
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
On exercise of options where exercise price is greater than average market price for the period | ​ | ​ | — | ​ | ​ | 15 | ​ | ​ | — | ​ | ​ | 27

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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 https://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257 + Details
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