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STOCKHOLDERS' EQUITY (Tables)
 9 Months Ended
Sep. 30, 2017
Equity [Abstract]  
Summary of Restricted Stock Activity
The following table summarizes restricted stock awards and performance stock awards activity issued under the 2014 Plan for the nine months ended September 30, 2017:

 
Restricted Stock Awards
 
Performance Stock Awards
 
Number of
Shares
 
Weighted
Average
Grant Date
Fair Value
 
Number of Target
Shares
 
Weighted
Average
Grant Date
Fair Value
Unvested restricted stock awards, January 1, 2017
532,294

 
$
9.98

 
332,092

 
$
11.73

Granted
323,503

 
$
13.70

 
181,067

 
$
14.36

Vested
(292,615
)
 
$
8.64

 
—

 
$
—

Forfeited
(47,581
)
 
$
10.41

 
(131,016
)
 
$
11.78

Unvested restricted stock awards, September 30, 2017
515,601

 
$
13.03

 
382,143

 
$
12.96