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Earnings Per Share | 9 Months Ended
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Sep. 30, 2020
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,
| 2020 |  | 2019 |  | 2020 |  | 2019
Net income | $ | 80,244 |  | $ | 98,582 |  | $ | 164,807 |  | $ | 277,742
Shares: |  |  |  |  |  |  |  |  |  |  |
Weighted-average number of common shares outstanding (for basic calculation) |  | 27,973 |  |  | 27,775 |  |  | 27,892 |  |  | 27,730
Dilutive stock awards |  | 481 |  |  | 613 |  |  | 478 |  |  | 538
Weighted-average number of common shares outstanding (for diluted calculation) |  | 28,454 |  |  | 28,388 |  |  | 28,370 |  |  | 28,268
Basic earnings per share | $ | 2.87 |  | $ | 3.55 |  | $ | 5.91 |  | $ | 10.02
Diluted earnings per share | $ | 2.82 |  | $ | 3.47 |  | $ | 5.81 |  | $ | 9.83
‎ The following stock awards were excluded from the calculation of diluted earnings per share:
| Three months ended |  | Nine months ended
| September 30, |  | September 30,
| 2020 |  | 2019 |  | 2020 |  | 2019
Stock awards subject to performance conditions |  | 100 |  |  | 84 |  |  | 97 |  |  | 83
Stock awards that were antidilutive |  | 2 |  |  | 17 |  |  | 74 |  |  | 178
Total stock awards excluded from diluted earnings per share |  | 102 |  |  | 101 |  |  | 171 |  |  | 261

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