Stock-Based Incentive Plans (Tables)

6 Months Ended

Jun. 30, 2019

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, 2018		1,614,907		$	32.94
Granted		334,904			31.54
Vested		(420,780	)		32.15
Forfeited		(17,565	)		31.55
Balance as of June 30, 2019		1,511,466		$	32.87