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Earnings Per Share | 3 Months Ended
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Mar. 31, 2021
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
| March 31,
| 2021 |  | 2020
Net income | $ | 127,101 |  | $ | 76,388
Shares: |  |  |  |  |
Weighted-average number of common shares outstanding (for basic calculation) |  | 28,125 |  |  | 27,792
Dilutive stock awards |  | 457 |  |  | 531
Weighted-average number of common shares outstanding (for diluted calculation) |  | 28,582 |  |  | 28,323
Basic earnings per share | $ | 4.52 |  | $ | 2.75
Diluted earnings per share | $ | 4.45 |  | $ | 2.70
The following stock awards were excluded from the calculation of diluted earnings per share:
| Three months ended
| March 31,
| 2021 |  | 2020
Stock awards subject to performance conditions |  | 69 |  |  | 90
Stock awards that were antidilutive |  | 48 |  |  | 103
Total stock awards excluded from diluted earnings per share |  | 117 |  |  | 193

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