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Earnings Per Share | 9 Months Ended
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Sep. 30, 2022
Earnings Per Share [Abstract] |
Earnings Per Share | 9. Earnings Per Share The following table sets forth the computations of basic and diluted earnings per share:
| Three months ended |  | Nine months ended
| September 30, |  | September 30,
| 2022 |  | 2021 |  | 2022 |  | 2021
Net income | $ | 257,138 |  | $ | 204,434 |  | $ | 675,374 |  | $ | 519,509
Shares: |  |  |  |  |  |  |  |  |  |  |
Weighted-average number of common shares outstanding (for basic calculation) |  | 27,773 |  |  | 28,150 |  |  | 27,907 |  |  | 28,137
Dilutive stock awards |  | 183 |  |  | 325 |  |  | 209 |  |  | 383
Weighted-average number of common shares outstanding (for diluted calculation) |  | 27,956 |  |  | 28,475 |  |  | 28,116 |  |  | 28,520
Basic earnings per share | $ | 9.26 |  | $ | 7.26 |  | $ | 24.20 |  | $ | 18.46
Diluted earnings per share | $ | 9.20 |  | $ | 7.18 |  | $ | 24.02 |  | $ | 18.22
The following stock awards were excluded from the calculation of diluted earnings per share:
| Three months ended |  | Nine months ended
| September 30, |  | September 30,
| 2022 |  | 2021 |  | 2022 |  | 2021
Stock awards subject to performance conditions |  | 61 |  |  | 75 |  |  | 60 |  |  | 74
Stock awards that were antidilutive |  | 167 |  |  | 3 |  |  | 164 |  |  | 42
Total stock awards excluded from diluted earnings per share |  | 228 |  |  | 78 |  |  | 224 |  |  | 116

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