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Earnings Per Share | 12 Months Ended
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Dec. 31, 2020
Earnings Per Share[Abstract] |
Earnings Per Share | 15. Earnings Per Share The computation of earnings per share follows (in thousands, except per share data):
|  |  | Net Income
For the Years Ended December 31, |  | Net Income |  | Shares |  | Earnings per Share
2020 |  |  |  |  |  |  |  |  |
| Earnings |  | $ | 319,466 |  | 15,955 |  | $ | 20.02
| Dilutive stock options |  |  | - |  | 368 |  |  |
| Nonvested stock awards |  |  | - |  | 75 |  |  |
| Diluted earnings |  | $ | 319,466 |  | 16,398 |  | $ | 19.48
2019 |  |  |  |  |  |  |  |  |
| Earnings |  | $ | 219,923 |  | 15,969 |  | $ | 13.77
| Dilutive stock options |  |  | - |  | 480 |  |  |
| Nonvested stock awards |  |  | - |  | 78 |  |  |
| Diluted earnings |  | $ | 219,923 |  | 16,527 |  | $ | 13.31
2018 |  |  |  |  |  |  |  |  |
| Earnings |  | $ | 205,544 |  | 16,059 |  | $ | 12.80
| Dilutive stock options |  |  | - |  | 650 |  |  |
| Nonvested stock awards |  |  | - |  | 94 |  |  |
| Diluted earnings |  | $ | 205,544 |  | 16,803 |  | $ | 12.23
During 2020, 566,000 stock options were excluded from the computation of diluted earnings per share as their exercise prices were greater than the average market price during most of the year. During 2019, 287,000 stock options were also excluded. During 2018, 246,000 stock options were also excluded.

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