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QUARTERLY FINANCIAL INFORMATION (UNAUDITED) (Tables) | 12 Months Ended
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Dec. 31, 2020
QUARTERLY FINANCIAL INFORMATION (UNAUDITED) |
Schedule of quarterly financial information | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ | ​ |  | ​ | ​ |  | ​ | ​ |  | ​ | ​ |  | ​ | ​ |  | Cash
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Basic | ​ | Diluted | ​ | Dividends
​ | ​ | ​ | ​ | ​ | Operating | ​ | Net | ​ | Income | ​ | Income Per | ​ | Declared
​ | ​ | Net Sales | ​ | Income | ​ | Income | ​ | Per Share | ​ | Share | ​ | Per Share
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
2020 |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |
First Quarter | ​ | $ | 176,054 | ​ | $ | 7,564 | ​ | $ | 5,431 | ​ | $ | 0.48 | ​ | $ | 0.48 | ​ | $ | 0.18
Second Quarter | ​ |  | 128,529 | ​ |  | 7,660 | ​ |  | 5,826 | ​ |  | 0.51 | ​ |  | 0.51 | ​ |  | 0.18
Third Quarter | ​ |  | 168,366 | ​ |  | 8,612 | ​ |  | 6,553 | ​ |  | 0.57 | ​ |  | 0.57 | ​ |  | 0.18
Fourth Quarter | ​ |  | 178,337 | ​ |  | 14,808 | ​ |  | 12,020 | ​ |  | 1.05 | ​ |  | 1.05 | ​ |  | 0.18
​ | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |
2019 | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |
First Quarter | ​ | $ | 197,213 | ​ | $ | 12,382 | ​ | $ | 8,660 | ​ | $ | 0.76 | ​ | $ | 0.76 | ​ | $ | 0.18
Second Quarter | ​ |  | 222,346 | ​ |  | 14,245 | ​ |  | 10,683 | ​ |  | 0.94 | ​ |  | 0.94 | ​ |  | 0.18
Third Quarter | ​ |  | 195,467 | ​ |  | 11,293 | ​ |  | 8,076 | ​ |  | 0.71 | ​ |  | 0.71 | ​ |  | 0.18
Fourth Quarter | ​ |  | 203,140 | ​ |  | 15,174 | ​ |  | 11,692 | ​ |  | 1.03 | ​ |  | 1.03 | ​ |  | 0.18

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- Definition Tabular disclosure of quarterly financial data. Includes, but is not limited to, financial information for fiscal quarters, cumulative effect of a change in accounting principle and earnings per share data. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121640914&loc=d3e1280-108306 + Details
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