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Share-Based Compensation (Tables)
6 Months Ended
Jun. 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
June 30,
 
Six Months Ended
June 30,
 
2015
 
2014
 
2015
 
2014
Stock and ESPP Options
 
 
 
 
 
 
 
Pre-tax compensation expense
$
28

 
$
30

 
$
54

 
$
74

Income tax expense (benefit)


 
(2
)
 
(1
)
 
(5
)
Stock and ESPP option expense, net of income taxes
$
28

 
$
28

 
$
53

 
$
69

Restricted Stock Awards
 
 
 
 
 
 
 
Pre-tax compensation expense
$
586

 
$
524

 
$
1,076

 
$
985

Income tax benefit
(198
)
 
(183
)
 
(366
)
 
(344
)
Restricted stock awards expense, net of income taxes
$
388

 
$
341

 
$
710

 
$
641

Total Share-Based Compensation
 
 
 
 
 
 
 
Pre-tax compensation expense
$
614

 
$
554

 
$
1,130

 
$
1,059

Income tax benefit
(198
)
 
(185
)
 
(367
)
 
(349
)
Total share-based compensation expense, net of income taxes
$
416

 
$
369

 
$
763

 
$
710

Stock Option Activity Under Stock Option Plans
Stock option activity under the Corporation's stock option plans as of June 30, 2015 and changes during the six months ended June 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
(46,266
)

$
15.28


 

 
Canceled
(100
)

$
28.25


 

 
Outstanding June 30, 2015
691,565


$
21.37


2.64

2,942,311

Vested and Expected to Vest at June 30, 2015
691,565


$
21.37


2.60

2,942,311

Exercisable at June 30, 2015
691,565


$
21.37


2.64

2,942,311

Unvested RSAs Outstanding
The following table summarizes information on unvested RSAs outstanding as of June 30, 2015:

 
Number of Shares

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


$
15.65

Granted
105,622


$
23.00

Vested
(142,451
)

$
11.74

Forfeited
(1,487
)

$
15.04

Unvested RSAs at June 30, 2015
347,134


$
19.49