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Share Capital (Tables) | 3 Months Ended
--- | ---
Mar. 31, 2015
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,
| 2015 |  | 2014
Class A Stock outstanding, beginning of period | 13,530,688 |  |  | 13,377,967 |
Issued pursuant to shared-based compensation plans | 104,143 |  |  | 138,659 |
Class A Stock outstanding, end of period | 13,634,831 |  |  | 13,516,626 |

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