Equity-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2018

The following table summarizes activity related to restricted stock and RSUs for the years ended December 31, 2018, 2017 and 2016.

	Restricted Stock & RSUs
	2018					2017					2016
				Weighted					Weighted					Weighted
				Average					Average					Average
	Number of			Grant Date		Number of			Grant Date		Number of			Grant Date
	Shares			Fair Value		Shares			Fair Value		Shares			Fair Value
Unvested Balance at January 1,		9,357,999		$	30.15		8,504,190		$	26.70		5,123,481		$	28.67
Granted		3,376,027			54.23		3,348,651			37.40		4,197,742			24.11
Forfeited		(127,606	)		38.90		(87,615	)		30.59		(75,159	)		26.04
Vested		(3,845,196	)		31.15		(2,407,227	)		27.10		(741,874	)		28.42
Unvested Balance at December 31,		8,761,224		$	37.59		9,357,999		$	30.15		8,504,190		$	26.70

The Company estimated the fair value of stock option awards at grant using the Black‑Scholes valuation model with the following assumptions:

	Assumptions
Expected life (in years)		6
Weighted-average risk free interest rate		1.91	%
Expected volatility		35	%
Dividend yield		2.72	%
Weighted-average fair value at grant date	$	6.70

The following table summarizes activity related to stock options for the years ended December 31, 2018, 2017 and 2016.