Share Capital (Tables)

6 Months Ended

Jun. 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 June 30,			For the Six Months Ended June 30,
	2016		2015	2016		2015
Class A Stock outstanding, beginning of period	13,263,532		13,634,831	13,238,486		13,530,688
Issued pursuant to shared-based compensation plans	7,163		15,318	272,483		119,461
Repurchased and canceled pursuant to the stock buy-back	(10,980	)	—	(251,254	)	—
Class A Stock outstanding, end of period	13,259,715		13,650,149	13,259,715		13,650,149