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Share-Based Compensation (Tables)
 9 Months Ended
Sep. 30, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Components of share-based compensation awards
The following table summarizes the components of the Corporation's share-based compensation awards recorded as expense:

 
Three Months Ended
September 30,
 
Nine Months Ended
September 30,
 
2015
 
2014
 
2015
 
2014
Stock and ESPP Options
 
 
 
 
 
 
 
Pre-tax compensation expense
$
23

 
$
81

 
$
78

 
$
156

Income tax expense (benefit)
5

 
(21
)
 
4

 
(26
)
Stock and ESPP option expense, net of income taxes
$
28

 
$
60

 
$
82

 
$
130

Restricted Stock Awards
 
 
 
 
 
 
 
Pre-tax compensation expense
$
533

 
$
471

 
$
1,609

 
$
1,455

Income tax benefit
(187
)
 
(165
)
 
(552
)
 
(509
)
Restricted stock awards expense, net of income taxes
$
346

 
$
306

 
$
1,057

 
$
946

Total Share-Based Compensation
 
 
 
 
 
 
 
Pre-tax compensation expense
$
556

 
$
552

 
$
1,687

 
$
1,611

Income tax benefit
(182
)
 
(186
)
 
(548
)
 
(535
)
Total share-based compensation expense, net of income taxes
$
374

 
$
366

 
$
1,139

 
$
1,076
Stock option activity under stock option plans
Stock option activity under the Corporation's stock option plans as of September 30, 2015 and changes during the nine months ended September 30, 2015, were as follows:

 
Number of
Shares

Weighted-Average Exercise Price

Weighted Average Remaining
Contractual Term
(in Years)

Aggregate
Intrinsic
Value
Outstanding at January 1, 2015
737,931


$
20.99


 

 
Granted
—





 

 
Exercised
(90,566
)

$
15.70


 

 
Canceled
(189,853
)

$
26.00


 

 
Outstanding September 30, 2015
457,512


$
19.96


3.31

2,976,604

Vested and Expected to Vest at September 30, 2015
457,512


$
19.96


3.31

2,976,604

Exercisable at September 30, 2015
457,512


$
19.96


3.31

2,976,604
Unvested RSAs outstanding
The following table summarizes information on unvested RSAs outstanding as of September 30, 2015:

 
Number of Shares

Weighted-Average
Grant Date Fair Value
Unvested RSAs at January 1, 2015
385,450


$
15.65

Granted
111,124


$
23.16

Vested
(145,697
)

$
11.81

Forfeited
(5,742
)

$
17.95

Unvested RSAs at September 30, 2015
345,135


$
19.65