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Stock Option Plans (Tables) | 3 Months Ended
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Mar. 31, 2021
Share-based Payment Arrangement [Abstract] |
Summary of Option Activity | The table below summarizes the option activity for the three months ended March 31, 2021:
|  | Number of Shares |  | Weighted Average Exercise Price per share |  | Aggregate Intrinsic Value
Outstanding at January 1 |  | 1,502,670 |  |  | $ | 52.86 |  |  | $ | — |
Granted |  | — |  |  | — |  |  | — |
Exercised |  | — |  |  | — |  |  | — |
Expired/Forfeited |  | (80,000) |  |  | 54.63 |  |  | — |
Outstanding at March 31 |  | 1,422,670 |  |  | 52.76 |  |  | 12,337 |
Exercisable at March 31 |  | 924,045 |  |  | 52.89 |  |  | 12,337 |

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- Definition Tabular disclosure of the change in stock options. + References No definition available. + Details
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