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Share Capital (Tables) | 3 Months Ended
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Mar. 31, 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 March 31,
| 2016 |  | 2015
Class A Stock outstanding, beginning of period | 13,238,486 |  |  | 13,530,688 |
Issued pursuant to shared-based compensation plans | 265,320 |  |  | 104,143 |
Repurchased and canceled pursuant to the stock buy-back | (240,274 | ) |  | — |
Class A Stock outstanding, end of period | 13,263,532 |  |  | 13,634,831 |

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