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Stock Incentive Plans (Tables)
 9 Months Ended
Sep. 30, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Summary of Stock Option Activity
The following table presents the activity under each of the stock incentive plans discussed above for the nine months ended September 30, 2015 (in thousands, except per share amounts):
 
Incentive
Stock
Option
Plan
 
2006
Plan
 
Total
 
Weighted
Average
Exercise
Price Per
Share
 
Total
Intrinsic
Value of
Options
Exercised
Outstanding and Exercisable as of December 31, 2014
22

 
35

 
57

 
$
11.69

 
 
Exercised
(22
)
 
(10
)
 
(32
)
 
$
11.78

 
$
359

Outstanding and Exercisable as of September 30, 2015
—

 
25

 
25

 
$
11.58

 
 
Summary of Restricted Stock Activity
The following table presents the activity for the nine months ended September 30, 2015 (in thousands, except per share amounts):
 
Number of Restricted Stock
 
Weighted Average
Grant Date
Fair Value
 
Total Intrinsic
Value of Restricted
Stock Vested
Outstanding as of December 31, 2014
982

 
$
18.55

 

Granted
533

 
$
23.92

 

Forfeited/Canceled
(59
)
 
$
19.37

 


Vested
(145
)
 
$
18.08

 
$
3,484

Outstanding as of September 30, 2015
1,311

 
$
20.73