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Share Capital (Tables) | 6 Months Ended
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Jun. 30, 2021
Equity [Abstract] |
Changes in Number of Shares of Class A Stock Outstanding | The following table reflects changes in the number of shares of Class A Stock outstanding for the periods indicated:
| For the Three Months Ended June 30, |  | For the Six Months Ended June 30,
| 2021 |  | 2020 |  | 2021 |  | 2020
Class A Stock outstanding, beginning of period | 12,586,043 |  |  | 12,610,740 |  |  | 12,381,778 |  |  | 12,698,703 |
Issued pursuant to share-based compensation plans | 6,603 |  |  | 25,783 |  |  | 210,868 |  |  | 347,324 |
Repurchased and canceled pursuant to the stock buy-back | — |  |  | (191,044) |  |  | — |  |  | (600,548) |
Class A Stock outstanding, end of period | 12,592,646 |  |  | 12,445,479 |  |  | 12,592,646 |  |  | 12,445,479 |

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