Stock Based Compensation (Tables)

12 Months Ended

Dec. 31, 2017

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

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

The following table summarizes transactions for our RSUs, excluding dividend equivalents, for 2017: 

Restricted Stock Units	Number of RSUs		Weighted Average Grant-Date Fair Value
RSUs at December 31, 2016	1,626,831		$18.16
Granted	459,315		$25.42
Vested	(764,730	)	$17.91
Forfeited	(91,751	)	$21.39
RSUs at December 31, 2017	1,229,665		$20.79