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Earnings Per Share | 6 Months Ended
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Jun. 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 |  | Six months ended
| June 30, |  | June 30,
| 2022 |  | 2021 |  | 2022 |  | 2021
Net income | $ | 259,942 |  | $ | 187,974 |  | $ | 418,236 |  | $ | 315,075
Shares: |  |  |  |  |  |  |  |  |  |  |
Weighted-average number of common shares outstanding (for basic calculation) |  | 27,905 |  |  | 28,134 |  |  | 27,974 |  |  | 28,130
Dilutive stock awards |  | 187 |  |  | 367 |  |  | 222 |  |  | 412
Weighted-average number of common shares outstanding (for diluted calculation) |  | 28,092 |  |  | 28,501 |  |  | 28,196 |  |  | 28,542
Basic earnings per share | $ | 9.32 |  | $ | 6.68 |  | $ | 14.95 |  | $ | 11.20
Diluted earnings per share | $ | 9.25 |  | $ | 6.60 |  | $ | 14.83 |  | $ | 11.04
The following stock awards were excluded from the calculation of diluted earnings per share:
| Three months ended |  | Six months ended
| June 30, |  | June 30,
| 2022 |  | 2021 |  | 2022 |  | 2021
Stock awards subject to performance conditions |  | 64 |  |  | 76 |  |  | 59 |  |  | 73
Stock awards that were antidilutive |  | 184 |  |  | 76 |  |  | 163 |  |  | 62
Total stock awards excluded from diluted earnings per share |  | 248 |  |  | 152 |  |  | 222 |  |  | 135

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