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Stock Options (Tables) | 12 Months Ended
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Dec. 31, 2023
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Schedule of Share-based Compensation, Stock Options, Activity |
| 2023 | 2022 | 2021
Options available for grant at end of year | 356,156 | 381,531 | 423,969
Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity | Following is a summary of activity in the Restricted Stock Awards ("RSA")/Units for the periods indicated:
| 2023 | 2022 | 2021
| Shares |  | Grant-Date Fair Value* | Shares |  | Grant-Date Fair Value* | Shares |  | Grant-Date Fair Value*
Awards outstanding at beginning of year | 97,630 |  |  | $ | 133.67 |  | 80,616 |  |  | $ | 129.53 |  | 91,043 |  |  | $ | 104.77 |
Granted | 45,267 |  |  | 178.66 |  | 48,396 |  |  | 133.70 |  | 35,224 |  |  | 157.00 |
Exercised | (33,847) |  |  | 129.51 |  | (29,922) |  |  | 122.19 |  | (45,651) |  |  | 101.36 |
Canceled | (15,072) |  |  | 118.97 |  | (1,460) |  |  | 143.82 |  | — |  |  | — |
Awards outstanding at end of year | 93,978 |  |  | $ | 158.99 |  | 97,630 |  |  | $ | 133.67 |  | 80,616 |  |  | $ | 129.53 |
*Weighted Averages
Qualified Stock Options |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Schedule of Share-based Compensation, Stock Options, Activity | Following is a summary of activity in the Incentive Stock Option Plans for the periods indicated:
| 2023 |  | 2022 |  | 2021
| Shares |  | Exercise Price* |  | Shares |  | Exercise Price* |  | Shares |  | Exercise Price*
Options outstanding at beginning of year | 84,647 |  |  | $ | 106.43 |  |  | 87,610 |  |  | $ | 91.24 |  |  | 100,920 |  |  | $ | 68.58 |
Granted | 14,425 |  |  | 178.25 |  |  | 17,625 |  |  | 137.93 |  |  | 18,900 |  |  | 156.38 |
Exercised | (21,260) |  |  | 72.09 |  |  | (14,780) |  |  | 50.79 |  |  | (30,210) |  |  | 53.68 |
Canceled | (1,950) |  |  | 148.08 |  |  | (5,808) |  |  | 114.48 |  |  | (2,000) |  |  | 130.92 |
Options outstanding at end of year | 75,862 |  |  | 128.64 |  |  | 84,647 |  |  | 106.43 |  |  | 87,610 |  |  | 91.24 |
Options exercisable at end of year | 34,027 |  |  | $ | 100.00 |  |  | 43,412 |  |  | $ | 78.50 |  |  | 49,360 |  |  | $ | 61.21 |
Options available for grant at end of year | 273,558 |  |  |  |  | 286,033 |  |  |  |  | 297,850 |  |  |
*Weighted Averages
Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range | Options outstanding and exercisable at December 31, 2023 were as follows:
Qualified Stock Options | Options Outstanding |  | Options Exercisable
| Shares | Remaining Contractual Life (yrs)* | Exercise Price* |  | Shares |  | Exercise Price*
Range of Exercise Price |  |  |  |  |  |  |  |  |
$52.51 - $83.99 | 12,225 |  |  | 2.23 |  | $ | 62.30 |  |  | 12,225 |  |  | $ | 62.30 |
$92.50 - $138.75 | 34,852 |  |  | 6.65 |  | $ | 120.20 |  |  | 16,432 |  |  | $ | 109.62 |
$156.38 - $234.57 | 28,785 |  |  | 8.13 |  | $ | 167.04 |  |  | 5,370 |  |  | $ | 156.38 |
Total | 75,862 |  |  |  |  |  |  | 34,027 |  |  |
*Weighted Averages
Non Qualified Options |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Schedule of Share-based Compensation, Stock Options, Activity | Following is a summary of activity in the Non-Qualified Stock Option Plans for the periods indicated:
| 2023 |  | 2022 |  | 2021
| Shares |  | Exercise Price* |  | Shares |  | Exercise Price* |  | Shares |  | Exercise Price*
Options outstanding at beginning of year | 1,000 |  |  | $ | 53.51 |  |  | 2,000 |  |  | $ | 53.51 |  |  | 3,000 |  |  | $ | 53.51 |
Granted | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Exercised | (1,000) |  |  | 53.51 |  |  | (1,000) |  |  | 53.51 |  |  | (1,000) |  |  | 53.51 |
Canceled | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Options outstanding at end of year | — |  |  | — |  |  | 1,000 |  |  | 53.51 |  |  | 2,000 |  |  | 53.51 |
Options exercisable at end of year | — |  |  | $ | — |  |  | 1,000 |  |  | $ | 53.51 |  |  | 2,000 |  |  | $ | 53.51 |
*Weighted Averages

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