Stock-Based Incentive Plans (Tables)

6 Months Ended

Jun. 30, 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		190,674			29.39
Vested		(229,570	)		26.95
Forfeited		(10,875	)		28.02
Balance as of June 30, 2015		869,948		$	27.38