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Stock Incentive Plans (Tables)
 9 Months Ended
Sep. 30, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Summary of Restricted Stock Awards
A summary of our restricted stock awards from January 1, 2016 to September 30, 2016 is as follows:
 
Number of
Shares
 
Weighted-
Average Grant
Date Fair
Value
Unvested balance at January 1, 2016
474,567

 
$
12.72

Granted
451,739

 
8.91

Vested
(241,698
)
 
11.83

Forfeited
(122,121
)
 
10.12

Unvested balance at September 30, 2016
562,487

 
$
10.61
Schedule of Nonvested Performance-based Units Activity
A summary of our PSUs from January 1, 2016 to September 30, 2016 is as follows:
 
Number of
Target 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
29,131

 
9.42

Vested (1)
(242,096
)
 
9.85

Forfeited
(96,301
)
 
10.75

Unvested balance at September 30, 2016
677,491

 
$
10.66


______________________
(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.