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STOCK-BASED COMPENSATION (Tables) | 12 Months Ended
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Dec. 31, 2024
Share-Based Payment Arrangement [Abstract] |
Restricted Stock Activity |
Restricted Stock Activity: | Years Ended December 31,
2024 |  | 2023 |  | 2022
Shares |  | Weighted Average Grant Date Fair Value |  | Shares |  | Weighted Average Grant Date Fair Value |  | Shares |  | Weighted Average Grant Date Fair Value
Unvested at beginning of year | 80,282 |  |  | $ | 153.43 |  |  | 96,708 |  |  | $ | 131.79 |  |  | 106,056 |  |  | $ | 116.37 |
Granted (1) (2) | 84,308 |  |  | 133.68 |  |  | 57,741 |  |  | 148.28 |  |  | 71,217 |  |  | 121.52 |
Forfeited | (2,545) |  |  | 156.45 |  |  | (1,015) |  |  | 144.79 |  |  | — |  |  | — |
Vested | (77,976) |  |  | 124.12 |  |  | (73,152) |  |  | 120.87 |  |  | (80,565) |  |  | 102.42 |
Unvested at end of year | 84,069 |  |  | 160.72 |  |  | 80,282 |  |  | 153.43 |  |  | 96,708 |  |  | 131.79 |
(1) Includes restricted shares granted during the year without performance or market conditions. Also includes restricted shares granted in previous years, for long-term and annual equity compensation awards for the Company's executive officers, for which performance based or market based conditions have been satisfied and the resulting number of shares have been determined during the year. (2) Does not include restricted shares subject to open performance periods. For the long-term equity compensation awards established in 2022 and 2023 and the long-term and annual equity compensation awards established in 2024, the number of shares depend on satisfaction of performance based or market based conditions, and the number of shares to be earned could range from zero to 135,501.
Restricted Stock Non-vested Awards By Expected Vesting Period | Following is a vesting schedule of the total unvested shares for employees as of December 31, 2024:
Unvested Shares Vesting Schedule |  | Number of Shares
2025 |  | 41,306 |
2026 |  | 22,978 |
2027 |  | 10,809 |
2028 |  | 6,546 |
2029 |  | 2,430 |
Total Unvested Shares |  | 84,069 |
Restriced Stock Activity - Directors | Following is a summary of the total restricted shares granted, forfeited and delivered (vested) to directors with the related weighted average grant date fair value share prices for 2024, 2023 and 2022. As of the grant dates, the aggregate fair value of shares that were granted during 2024, 2023 and 2022 was $811,000, $661,000 and $906,000, respectively. As of the vesting dates, the fair value of shares that vested during 2024, 2023 and 2022 was $680,000, $904,000 and $8,000, respectively.
Restricted Stock Activity: | Years Ended December 31,
2024 |  | 2023 |  | 2022
Shares |  | Weighted Average Grant Date Fair Value |  | Shares |  | Weighted Average Grant Date Fair Value |  | Shares |  | Weighted Average Grant Date Fair Value
Unvested at beginning of year | 4,282 |  |  | $ | 160.15 |  |  | 5,800 |  |  | $ | 158.31 |  |  | 156 |  |  | $ | 120.39 |
Granted | 5,040 |  |  | 160.87 |  |  | 4,134 |  |  | 159.79 |  |  | 5,696 |  |  | 159.00 |
Forfeited | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Vested | (4,218) |  |  | 159.58 |  |  | (5,652) |  |  | 158.00 |  |  | (52) |  |  | 120.39 |
Unvested at end of year | 5,104 |  |  | 161.33 |  |  | 4,282 |  |  | 160.15 |  |  | 5,800 |  |  | 158.31 |
Fair value assumptions used in long-term compensation awards | The following table summarizes the assumptions used in the Monte Carlo simulation pricing model used to determine the grant date fair value of the multi-year market conditions component of the long-term compensation awards for 2024, 2023 and 2022:
| 2024 Award |  | 2023 Award |  | 2022 Award
Valuation date | 2/26/2024 |  | 3/2/2023 |  | 3/3/2022
Risk-free interest rate | 4.65 | % |  | 4.68 | % |  | 1.64 | %
Expected share price volatility for the Company | 22.85 | % |  | 31.01 | % |  | 30.01 | %
Expected share price volatility for peer group companies - low end of range | 20.46 | % |  | 27.31 | % |  | 26.32 | %
Expected share price volatility for peer group companies - high end of range | 62.79 | % |  | 51.26 | % |  | 50.10 | %
Expected dividend yield | 2.84 | % |  | 3.02 | % |  | 2.27 | %
Number of simulation paths | 1,000,000 |  |  | 1,000,000 |  |  | 1,000,000 |
Grant date fair value (in thousands) | $ | 4,442 |  |  | 4,885 |  |  | 2,912 |
Schedule of shared based compensation, service component of award, activity | The following table presents the service only component of the long-term compensation awards for the four years ended December 31, 2024:
| 2024 Award |  | 2023 Award |  | 2022 Award |  | 2021 Award
Grant date | 2/26/2024 |  | 3/2/2023 |  | 3/3/2022 |  | 2/25/2021
Shares granted | 8,436 |  |  | 9,583 |  |  | 5,830 |  |  | 7,801 |
Grant date share price | $ | 179.17 |  |  | 165.83 |  |  | 193.54 |  |  | 138.93 |
Long-term compensation awards with a total shareholder return component | The following table presents the total shareholder return component of the long-term compensation awards for the four years ended December 31, 2024:
| 2024 Award |  | 2023 Award |  | 2022 Award |  | 2021 Award
Grant date | 2/26/2024 |  | 3/2/2023 |  | 3/3/2022 |  | 2/25/2021
Performance period | 1/1/24 - 12/31/26 |  | 1/1/23 - 12/31/25 |  | 1/1/22 - 12/31/24 |  | 1/1/21 - 12/31/23
Range of earnable shares - low end of range | — |  |  | — |  |  | — |  |  | — |
Range of earnable shares - high end of range | 39,364 |  |  | 44,725 |  |  | 27,212 |  |  | 36,400 |
Shares determined | N/A (1) |  | N/A (1) |  | N/A (1) |  | 36,400 |
(1) The market conditions for this award have not yet been satisfied and the number of shares have not yet been determined.
Annual equity compensation awards based on company performance measures | The following table presents the Company performance measures component of the annual equity compensation awards for the three years ended December 31, 2024:
| 2024 Award |  | 2023 Award |  | 2022 Award |  |  |  |
Grant date | 2/26/2024 |  | 3/2/2023 |  | 3/3/2022 |  |  |  |
Performance period | 1/1/24 - 12/31/24 |  | 1/1/23 - 12/31/23 |  | 1/1/22 - 12/31/22 |  |  |  |
Range of earnable shares - low end of range | — |  |  | — |  |  | — |  |  |  |  |
Range of earnable shares - high end of range | 18,548 |  |  | 21,438 |  |  | 13,289 |  |  |  |  |
Shares determined | N/A (1) |  | 21,438 |  |  | 12,761 |  |  |  |  |
Grant date share price | $ | 179.17 |  |  | 165.83 |  |  | 193.54 |  |  |  |  |
(1) The performance conditions for this award have not yet been satisfied and the number of shares have not yet been determined.
Individual performance for annual equity compensation awards | The following table presents the individual performance goals component of the annual equity compensation awards for the three years ended December 31, 2024:
| 2024 Award |  | 2023 Award |  | 2022 Award
Grant date | N/A (1) |  | 2/14/2024 |  | 2/15/2023
Performance period | 1/1/24 - 12/31/24 |  | 1/1/23 - 12/31/23 |  | 1/1/22 - 12/31/22
Range of earnable shares - low end of range | — |  |  | — |  |  | — |
Range of earnable shares - high end of range | 5,652 |  |  | 5,358 |  |  | 3,323 |
Shares determined | N/A (1) |  | 4,814 |  |  | 3,022 |
Grant date share price | N/A (1) |  | $ | 183.46 |  |  | 168.90 |
(1) For this award, the performance conditions and grant date criteria under ASC 718, Compensation - Stock Compensation, have not yet been satisfied and the date of grant and resulting number of shares have not yet been determined.
Schedule of share based compensation, non executive officers, activity | The following table presents the compensation awards to non-executive officers for the three years ended December 31, 2024:
| 2024 Award |  | 2023 Award |  | 2022 Award
Grant date | 8/5/2024 |  | 6/20/2023 |  | 6/20/2022
Shares granted | 12,150 |  |  | 11,325 |  |  | 11,225 |
Grant date share price | $ | 179.35 |  |  | 172.70 |  |  | 148.48 |

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