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Stock Incentive Plans (Tables)
3 Months Ended
Mar. 31, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Schedule of restricted common stock and performance based restricted stock unit in stock incentive plans
The following table summarizes restricted common stock and performance-based restricted stock unit activity in our stock incentive plans for the three months ended March 31, 2015.
 
 
Restricted Common Stock
 
Restricted Stock Units
 
Number of Shares
 
Weighted Average
Grant Date Fair Value
 
Number of
Units
 
Weighted Average
Grant Date Fair Value
Unvested at January 1, 2015
 
752,701

 
 
 
$
11.90

 
 
 
776,500

 
 
 
$
10.66

 
Granted
 
26,232

 
 
 
12.58

 
 
 

 
 
 

 
Vested
 
(4,000
)
 
 
 
(8.95
)
 
 
 

 
 
 

 
Forfeited
 
(41,404
)
 
 
 
(11.54
)
 
 
 
(32,300
)
 
 
 
(10.89
)
 
Unvested at March 31, 2015
 
733,529

 
 
 
11.96

 
 
 
744,200

 
 
 
10.65