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SHARE CAPITAL AND CAPITAL IN EXCESS OF PAR VALUE (Tables) | 12 Months Ended
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Dec. 31, 2023
SHARE CAPITAL AND CAPITAL IN EXCESS OF PAR VALUE |
Schedule of changes in share capital and capital in excess of par value | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Capital in |
​ | ​ | ​ | ​ | ​ | ​ | ​ | Class B | ​ | ​ | ​ | ​ | ​ | ​ | Excess |
​ | ​ | Common Stock | ​ | Common Stock | ​ | Treasury Stock | ​ | of Par |
​ |  | Shares |  | Amount |  | Shares |  | Amount |  | Shares |  | Amount |  | Value |
​ | ​ | (000’s) | ​ | ​ | ​ | ​ | (000’s) | ​ | ​ | ​ | ​ | (000’s) | ​ | ​ | ​ | ​ | ​ | ​ |
Balance at December 31, 2020 |  | 39,073 | ​ | $ | 27,134 |  | 27,012 | ​ | $ | 18,758 |  | 93 | ​ | $ | (1,992) | ​ | $ | 706,930 | ​
Issuance of 3% stock dividend |  | 1,163 | ​ |  | 807 |  | 810 | ​ |  | 562 |  | 3 | ​ |  | — | ​ |  | 32,495 | ​
Conversion of Class B common shares to common shares |  | 29 | ​ |  | 20 |  | (29) | ​ |  | (20) |  | — | ​ |  | — | ​ |  | — | ​
Purchase and retirement of common shares |  | (921) | ​ |  | (639) |  | — | ​ |  | — |  | — | ​ |  | — | ​ |  | (29,545) | ​
Balance at December 31, 2021 |  | 39,344 | ​ |  | 27,322 |  | 27,793 | ​ |  | 19,300 |  | 96 | ​ |  | (1,992) | ​ |  | 709,880 | ​
Issuance of 3% stock dividend |  | 1,176 | ​ |  | 817 |  | 833 | ​ |  | 579 |  | 3 | ​ |  | — | ​ |  | 41,068 | ​
Conversion of Class B common shares to common shares |  | 19 | ​ |  | 13 |  | (19) | ​ |  | (13) |  | — | ​ |  | — | ​ |  | — | ​
Purchase and retirement of common shares |  | (818) | ​ |  | (568) |  | — | ​ |  | — |  | — | ​ |  | — | ​ |  | (31,342) | ​
Balance at December 31, 2022 |  | 39,721 | ​ | ​ | 27,584 |  | 28,607 | ​ | ​ | 19,866 |  | 99 | ​ | ​ | (1,992) | ​ | ​ | 719,606 | ​
Issuance of 3% stock dividend |  | 1,185 | ​ |  | 823 |  | 858 | ​ |  | 596 |  | 3 | ​ |  | — | ​ |  | 50,649 | ​
Conversion of Class B common shares to common shares |  | 20 | ​ |  | 14 |  | (20) | ​ |  | (14) |  | — | ​ |  | — | ​ |  | — | ​
Purchase and retirement of common shares |  | (927) | ​ |  | (644) |  | — | ​ |  | — |  | — | ​ |  | — | ​ |  | (32,802) | ​
Balance at December 31, 2023 |  | 39,999 | ​ | $ | 27,777 |  | 29,445 | ​ | $ | 20,448 |  | 102 | ​ | $ | (1,992) | ​ | $ | 737,453 | ​
​
Schedule of shares purchased and retired | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Total Number of Shares |  | ​ | ​ |
Year | ​ | Purchased (000’s) | ​ | Average Price Paid Per Share |
2023 |  | 928 | ​ | $ | 35.66 | ​
2022 |  | 818 | ​ | $ | 38.98 | ​
2021 |  | 921 | ​ | $ | 32.76 | ​
​

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- Definition Tabular disclosure of changes in the separate accounts comprising stockholders' equity (in addition to retained earnings) and of the changes in the number of shares of equity securities during at least the most recent annual fiscal period and any subsequent interim period presented is required to make the financial statements sufficiently informative if both financial position and results of operations are presented. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -SubTopic 10 -Topic 505 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481112/505-10-50-2 + Details
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