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CAPITAL STOCK (Details) - shares | 12 Months Ended |
--- | --- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Cumulative preferred stock, shares outstanding (in shares) | 0 | 0 |  |
Stock issued during period, shares, restricted stock award, retained (in shares) | 32,800 | 31,132 | 61,377 |
Stock issued during period, shares, performance share units, retained (in shares) | 18,521 | 10,359 | 9,746 |
Treasury stock, common, shares (in shares) | 60,341,817 | 59,402,896 |  |
Common Stock |  |  |  |
Balance at beginning of period, common stock (in shares) | 50,256,323 | 51,220,205 | 52,524,391 |
Exercised (in shares) | (139,189) | (101,802) | (188,444) |
Settlement of restricted stock units – net of 32,800, 31,132 and 61,377 shares retained, respectively | (83,795) | (64,649) | (127,969) |
Settlement of performance share units – net of 18,521, 10,359 and 9,746 shares retained, respectively | (28,135) | (13,890) | (12,507) |
Purchase of treasury shares (in shares) | 1,190,040 | 1,144,223 | 1,633,106 |
Balance at end of period, common stock (in shares) | 49,317,402 | 50,256,323 | 51,220,205 |
Treasury Stock |  |  |  |
Exercised (in shares) | (139,189) | (101,802) | (188,444) |
Settlement of restricted stock units – net of 32,800, 31,132 and 61,377 shares retained, respectively | (83,795) | (64,649) | (127,969) |
Settlement of performance share units – net of 18,521, 10,359 and 9,746 shares retained, respectively | (28,135) | (13,890) | (12,507) |
Purchase of treasury shares (in shares) | 1,190,040 | 1,144,223 | 1,633,106 |
Treasury stock, common, shares (in shares) | 60,341,817 | 59,402,896 | 58,439,014 | 57,134,828

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