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EARNINGS PER SHARE (Tables) | 6 Months Ended
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Jun. 30, 2021
EARNINGS PER SHARE |
Schedule of Earnings Per Share, Basic and Diluted | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Three Months Ended June 30,
​ | ​ | 2021 |  | 2020
​ | ​ | (In Thousands, Except Per Share Data)
Basic: | ​ | ​ | ​ | ​ | ​ | ​
Average common shares outstanding | ​ |  | 13,710 | ​ |  | 14,084
Net income and net income available to common stockholders |  | $ | 20,114 |  | $ | 13,203
Per common share amount |  | $ | 1.47 |  | $ | 0.94
​ | ​ | ​ | ​ | ​ | ​ | ​
Diluted: | ​ | ​ | ​ | ​ | ​ | ​
Average common shares outstanding | ​ | ​ | 13,710 | ​ | ​ | 14,084
Net effect of dilutive stock options – based on the treasury stock method using average market price | ​ | ​ | 102 | ​ | ​ | 40
Diluted common shares | ​ | ​ | 13,812 | ​ | ​ | 14,124
Net income and net income available to common stockholders |  | $ | 20,114 |  | $ | 13,203
Per common share amount |  | $ | 1.46 |  | $ | 0.93
​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Six Months Ended June 30,
​ | ​ | 2021 |  | 2020
​ | ​ | (In Thousands, Except Per Share Data)
​ | ​ | ​ | ​ | ​ | ​ | ​
Basic: | ​ | ​ |  |  | ​ |
Average common shares outstanding | ​ | ​ | 13,713 |  | ​ | 14,153
Net income and net income available to common stockholders | ​ | $ | 38,982 | ​ | $ | 28,071
Per common share amount | ​ | $ | 2.84 | ​ | $ | 1.98
​ | ​ | ​ | ​ | ​ | ​ | ​
Diluted: | ​ |  |  | ​ |  |
Average common shares outstanding | ​ |  | 13,713 | ​ |  | 14,153
Net effect of dilutive stock options – based on the treasury stock method using average market price | ​ |  | 94 | ​ |  | 56
Diluted common shares | ​ |  | 13,807 | ​ |  | 14,209
Net income and net income available to common stockholders | ​ | $ | 38,982 | ​ | $ | 28,071
Per common share amount | ​ | $ | 2.82 | ​ | $ | 1.98
​

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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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