Stock-Based Compensation (Tables)

9 Months Ended

Sep. 30, 2018

Share Based Compensation [Abstract]

Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity

A summary of the RSU and RSA activity for the nine months ended September 30, 2018 is presented in the following table:

	Restricted Stock Units						Restricted Stock Awards
	Units				Weighted- Average Grant Date Fair Value		Units				Weighted- Average Grant Date Fair Value
					(in millions)						(in millions)
Unvested outstanding as of December 31, 2017		1,579,499		$		12.25		10,809		$		19.13
Granted		317,904				32.97		—				—
Vested		(783,672	)			8.05		(10,809	)			19.13
Canceled		(9,885	)			19.13		—				—
Unvested outstanding as of September 30, 2018		1,103,846		$		21.14		—		$		—

Schedule of Share-based Compensation, Stock Options Activity

A summary of the ERI Stock Option activity for the nine months ended September 30, 2018 is presented in the following table:

				Weighted-
				Average
				Exercise
	Options			Price
Outstanding as of December 31, 2017		271,852		$	9.63
Expired		(15,776	)		10.89
Exercised		(120,120	)		9.09
Outstanding as of September 30, 2018		135,956		$	9.96