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Treasury Stock (Tables) | 12 Months Ended
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Dec. 31, 2019
Equity [Abstract] |
Treasury Stock Activity | Treasury stock activity for the years ended December 31, 2019, 2018 and 2017, was as follows:
(Shares in thousands) | 2019 |  | 2018 |  | 2017
Balance at January 1 | 15,781 |  |  | 15,001 |  |  | 13,221 |
Compensation plans and other | (542 | ) |  | (460 | ) |  | (547 | )
Share repurchases | 7,730 |  |  | 1,240 |  |  | 2,327 |
Balance at December 31 | 22,969 |  |  | 15,781 |  |  | 15,001 |

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