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Share Capital (Tables) | 9 Months Ended
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Sep. 30, 2016
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 September 30, |  | For the Nine Months Ended September 30,
| 2016 |  | 2015 |  | 2016 |  | 2015
Class A Stock outstanding, beginning of period | 13,259,715 |  |  | 13,650,149 |  |  | 13,238,486 |  |  | 13,530,688 |
Issued pursuant to shared-based compensation plans | 10,988 |  |  | 12,063 |  |  | 283,471 |  |  | 131,524 |
Repurchased and canceled pursuant to the stock buy-back | (2,264 | ) |  | (328,844 | ) |  | (253,518 | ) |  | (328,844 | )
Class A Stock outstanding, end of period | 13,268,439 |  |  | 13,333,368 |  |  | 13,268,439 |  |  | 13,333,368 |

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