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Stock Incentive Plans (Tables)
 12 Months Ended
Dec. 31, 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 three years ended December 31, 2015, 2014 and 2013 (in thousands, except per share amounts):
 
Incentive
Stock
Option
Plan
 
2006 Stock
Incentive
Plan
 
Total
 
Weighted
Average
Exercise
Price Per
Share
 
Total
Intrinsic
Value of
Options
Exercised
Exercisable as of December 31, 2012
154

 
93

 
247

 
$
10.87

 
 
Exercised
(57
)
 
(10
)
 
(67
)
 
$
8.98

 
$
573

Exercisable as of December 31, 2013
97

 
83

 
180

 
$
11.57

 
 
Exercised
(57
)
 
(48
)
 
(105
)
 
$
11.61

 
$
1,029

Forfeited/Cancelled
(18
)
 
—

 
(18
)
 
$
11.00

 
 
Exercisable as of December 31, 2014
22

 
35

 
57

 
$
11.69

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

 
$
359

Exercisable as of December 31, 2015
—

 
25

 
25

 
$
11.58

 
 
Summary of Employee and Director Stock Option Activity
The following table summarizes information about employee and director stock options under all of the plans mentioned above as of December 31, 2015 (in thousands, except per share amounts):
 
OUTSTANDING AND EXERCISABLE
Range of Exercise Prices
Number of Awards (#)
 
Weighted Average
Remaining
Contractual Term
(Yrs)
 
Weighted
Average
Exercise
Price ($)
 
Total
Intrinsic
Value
$9.13 - $14.45
25

 
1.57
 
$
11.58

 
$
342
Summary of Restricted Stock Activity
The following table presents the activity for the three years ended December 31, 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, 2012
38

 
$
12.11

 
 
Granted
904

 
$
16.72

 
 
Vested
(109
)
 
$
14.15

 
$
2,092

Forfeited
(22
)
 
$
15.43

 
 
Outstanding as of December 31, 2013
811

 
$
16.89

 
 
Granted
528

 
$
20.18

 
 
Vested
(273
)
 
$
17.37

 
$
5,624

Forfeited
(84
)
 
$
18.38

 
 
Outstanding as of December 31, 2014
982

 
$
18.55

 
 
Granted
556

 
$
24.01

 
 
Vested
(186
)
 
$
18.28

 
$
4,580

Forfeited
(59
)
 
$
19.37

 
 
Outstanding as of December 31, 2015
1,293

 
$
20.89