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Basic and Diluted Earnings per Share | 12 Months Ended
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Dec. 31, 2022
Earnings Per Share [Abstract] |
Basic and Diluted Earnings per Share | NOTE 6. BASIC AND DILUTED EARNINGS PER SHARE Diluted earnings attributable to shareholders per share is computed using the weighted average number of common shares and dilutive potential common shares outstanding. Dilutive potential shares represent outstanding stock options, including purchase options under the Company's employee stock purchase plan and unvested RSUs. Basic earnings attributable to shareholders per share is calculated using the weighted average number of common shares outstanding without taking into consideration dilutive potential common shares outstanding. The following table reconciles the numerator and the denominator of the basic and diluted per share computations for earnings attributable to shareholders.
|  |  | Net earnings attributable to shareholders |  |  | Weighted average shares |  |  | Earnings per share |
| 2022 |  |  |  |  |  |  |  |  |
| Basic earnings attributable to shareholders |  | $ | 1,357,399 |  |  |  | 163,010 |  |  | $ | 8.33 |
| Effect of dilutive potential common shares |  |  | — |  |  |  | 1,417 |  |  |  | — |
| Diluted earnings attributable to shareholders |  | $ | 1,357,399 |  |  |  | 164,427 |  |  | $ | 8.26 |
| 2021 |  |  |  |  |  |  |  |  |
| Basic earnings attributable to shareholders |  | $ | 1,415,492 |  |  |  | 169,145 |  |  | $ | 8.37 |
| Effect of dilutive potential common shares |  |  | — |  |  |  | 2,105 |  |  |  | — |
| Diluted earnings attributable to shareholders |  | $ | 1,415,492 |  |  |  | 171,250 |  |  | $ | 8.27 |
| 2020 |  |  |  |  |  |  |  |  |
| Basic earnings attributable to shareholders |  | $ | 696,140 |  |  |  | 168,333 |  |  | $ | 4.14 |
| Effect of dilutive potential common shares |  |  | — |  |  |  | 2,563 |  |  |  | — |
| Diluted earnings attributable to shareholders |  | $ | 696,140 |  |  |  | 170,896 |  |  | $ | 4.07 |
In 2022, 1,072 potential common shares were excluded from the computation of diluted earnings per share because the effect would have been antidilutive. Substantially all outstanding potential common shares in 2021 and 2020 were dilutive.

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