Stock-Based Incentive Plans (Tables)

9 Months Ended

Sep. 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		(342,978	)		26.94
Forfeited		(28,143	)		28.27
Balance as of September 30, 2015		739,272		$	27.42