Stock-Based Incentive Plans (Tables)

3 Months Ended

Mar. 31, 2015

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Movement in Outstanding Shares of Restricted Class A Common Stock and Weighted-Average Grant Date Fair Value Per Share

The following table details the movement in our outstanding shares of restricted class A common stock and the weighted-average grant date fair value per share:

	Restricted Class A Common Stock			Weighted-Average Grant Date Fair Value Per Share
Balance as of December 31, 2014		919,719		$	26.86
Granted		187,674			29.38
Vested		(55,438	)		25.61
Forfeited		(6,625	)		27.14
Balance as of March 31, 2015		1,045,330		$	27.38