Stock Incentive Plans (Tables)

12 Months Ended

Dec. 31, 2018

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Schedule of Share Based Compensation Restricted Stock Activity

A summary of our restricted stock awards from January 1, 2016 to December 31, 2018 is as follows:



	Number of Shares		Weighted- Average Grant Date Fair Value
Unvested balance at January 1, 2016	474,567		$	12.72
Granted	461,281		8.94
Forfeited	(126,610	)	10.08
Vested	(241,698	)	11.83
Unvested balance at December 31, 2016	567,540		10.62
Granted	324,502		11.19
Forfeited	(16,669	)	10.80
Vested	(244,411	)	11.29
Unvested balance at December 31, 2017	630,962		10.66
Granted	349,091		10.19
Forfeited	(51,061	)	10.44
Vested	(287,148	)	11.02
Unvested balance at December 31, 2018	641,844		$	10.25

Performance Stock Units

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Fair Value Valuation Assumptions

The determination of the grant-date fair values of outstanding awards based on our relative total stockholder return included the following assumptions:



Award Grant Date	Volatility		Risk-Free Rate		Fair Value at Grant Date
February 26, 2016	24.3	%	0.93	%	$	8.42
February 26, 2017	26.7	%	1.46	%	$	10.89
March 2, 2018	26.9	%	2.40	%	$	9.52
April 2, 2018	26.9	%	2.37	%	$	9.00

Schedule of Nonvested Performance-based Units Activity

A summary of our PSUs from January 1, 2016 to December 31, 2018 is as follows:



	Number of Units		Weighted- Average Grant Date Fair Value
Unvested balance at January 1, 2016	676,359		$	11.41
Granted	310,398		8.54
Additional units from dividends	38,324		9.37
Vested (1)	(242,096	)	9.85
Forfeited	(96,301	)	10.74
Unvested balance at December 31, 2016	686,684		10.65
Granted	266,009		11.04
Additional units from dividends	33,478		11.17
Vested (2)	(200,374	)	12.15
Unvested balance at December 31, 2017	785,797		10.42
Granted	293,111		9.82
Additional units from dividends	35,197		11.24
Vested (3)	(218,514	)	11.98
Forfeited	(113,668	)	9.86
Unvested balance at December 31, 2018	781,923		$	11.19

______________________


(1)	The number of shares of common stock earned for the PSUs vested in 2016 was equal to 89.5% of the PSU Target Award.


(2)	There was no payout of shares of our common stock for PSUs that vested on February 27, 2017, as our total stockholder return fell below the 30th percentile of the total stockholder returns of the peer group over the three-year performance period.


(3)	The number of shares of common stock earned for the PSUs vested in 2018 was equal to 51.75% of the PSU Target Award.