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Share-Based Compensation (Tables)
 9 Months Ended
Sep. 30, 2019
Share-based Payment Arrangement [Abstract]  
Schedule of components of share-based compensation awards
The following table summarizes the components of the Corporation's share-based compensation awards recorded as an expense and the income tax benefit of such awards.
 
Three Months Ended
September 30,
 
Nine Months Ended
September 30,
 
2019
 
2018
 
2019
 
2018
Stock and ESPP Options
 
 
 
 
 
 
 
Pre-tax compensation expense
$
36

 
$
39

 
$
72

 
$
88

Income tax benefit
—

 
(15
)
 
(57
)
 
(153
)
Stock and ESPP option expense, net of income taxes
$
36

 
$
24

 
$
15

 
$
(65
)
Restricted Stock Awards
 
 
 
 
 
 
 
Pre-tax compensation expense
$
1,026

 
$
852

 
$
2,815

 
$
2,458

Income tax benefit
(226
)
 
(202
)
 
(951
)
 
(952
)
Restricted stock awards expense, net of income taxes
$
800

 
$
650

 
$
1,864

 
$
1,506

Total Share-Based Compensation
 
 
 
 
 
 
 
Pre-tax compensation expense
$
1,062

 
$
891

 
$
2,887

 
$
2,546

Income tax benefit
(226
)
 
(217
)
 
(1,008
)
 
(1,105
)
Total share-based compensation expense, net of income taxes
$
836

 
$
674

 
$
1,879

 
$
1,441
Schedule of stock option activity under stock option plans

Stock option activity under the Corporation's stock option plans as of September 30, 2019 and changes during the nine months ended September 30, 2019, were as follows:
 
Number of
Shares
 
Weighted-Average Exercise Price
 
Weighted Average Remaining
Contractual Term
(in Years)
 
Aggregate
Intrinsic
Value
Outstanding at January 1, 2019
76,300

 
$
12.40

 
 
 
 
Exercised
(12,950
)
 
$
9.32

 
 
 
 
Cancelled
—

 
$
—

 
 
 
 
Outstanding September 30, 2019
63,350

 
$
13.03

 
2.55
 
$
1,558,945

Vested and Expected to Vest at September 30, 2019
63,350

 
$
13.03

 
2.55
 
$
1,558,945

Exercisable at September 30, 2019
63,350

 
$
13.03

 
2.55
 
$
1,558,945
Schedule of Unvested RSAs outstanding
The following table summarizes information on unvested RSAs outstanding as of September 30, 2019:
 
Number of Shares
 
Weighted-Average
Grant Date Fair Value
Unvested RSAs at January 1, 2019
344,362

 
$
36.80

Granted
119,743

 
$
37.08

Vested
(113,043
)
 
$
23.61

Forfeited
(2,400
)
 
$
40.54

Unvested RSAs at September 30, 2019
348,662

 
$
41.51