Share Capital (Tables)

3 Months Ended

Mar. 31, 2018

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,
	2018	2017
Class A Stock outstanding, beginning of period	13,139,203	13,261,095
Issued pursuant to shared-based compensation plans	1,900	179,020
Repurchased and canceled pursuant to the stock buy-back	—	(257,783	)
Class A Stock outstanding, end of period	13,141,103	13,182,332