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Stockholders' Equity (Tables) | 12 Months Ended
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Dec. 31, 2023
Equity [Abstract] |
Stockholders' Equity |
|  | Common Stock |  |  | Treasury Stock |
(number of shares in thousands) |  | 2023 |  |  | 2022 |  |  | 2021 |  |  | 2023 |  |  | 2022 |  |  | 2021 |
At January 1 |  |  | 29,554.5 |  |  |  | 29,554.5 |  |  |  | 29,554.5 |  |  |  | 4,789 |  |  |  | 4,781 |  |  |  | 4,959 |
Exercise of options |  |  | — |  |  |  | — |  |  |  | — |  |  |  | (113 | ) |  |  | (55 | ) |  |  | (185 | )
Stock purchases |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 11 |  |  |  | 63 |  |  |  | 7 |
At December 31 |  |  | 29,554.5 |  |  |  | 29,554.5 |  |  |  | 29,554.5 |  |  |  | 4,687 |  |  |  | 4,789 |  |  |  | 4,781 |

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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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