Stock Plans and Management Compensation (Tables) |
12 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Dec. 31, 2023 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Share-Based Payment Arrangement, Noncash Expense [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Non-Vested Stock Award Activity |
The weighted average price per non-vested stock unit at grant date was $88.00, $93.62 and $91.14 for units granted in 2023, 2022 and 2021, respectively. Non-vested stock unit activity for the year ended December 31, 2023 was as follows:
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| Fair Value Assumptions for Performance Awards |
The fair values of the senior executives' performance share award grants with a TSR modifier at the grant date in 2023, 2022 and 2021 were $88.47, $94.59 and $91.44, respectively, which were estimated using the Monte Carlo valuation model, and incorporated the following assumptions:
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| Performance Award Activity |
Performance award activity for the year ended December 31, 2023 was as follows:
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