Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2018

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Summary of Restricted Stock Unit Activity

The table below summarizes restricted stock unit activity for the year ended December 31, 2018:

	Restricted Stock Units		Weighted Average Grant Date Fair Value
Restricted stock units outstanding at December 31, 2017	2,185,466		$	25.81
Granted	374,810		28.51
Released	(339,972	)	26.38
Forfeited	(18,080	)	28.18
Restricted stock units outstanding at December 31, 2018	2,202,224		26.16