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Share-Based Compensation (Tables)
 9 Months Ended
Sep. 30, 2012
Share-based Compensation [Abstract]  
Summary of company stock activities
The Company’s stock option activity for the nine months ended September 30, 2012 is summarized as follows: 
 
Shares
 
Weighted
Average
Exercise
Price
Outstanding at January 1, 2012
281,725

 
$
18.27

Expired
(15,375
)
 
$
18.27

Exercised
(265,350
)
 
$
18.27

Outstanding at September 30, 2012
1,000

 
$
19.90

Vested and exercisable at September 30, 2012
1,000

 
$
19.90
Summary of company stock award
A summary of the status of the Company’s stock awards as of September 30, 2012, and changes during the nine months ended September 30, 2012, is presented below: 
 
Shares
 
Weighted
 Average
Grant-Date
Fair Value
Nonvested at January 1, 2012
289,290

 
$
16.09

Granted
208,250

 
$
18.36

Vested
(86,900
)
 
$
16.79

Forfeited
(9,240
)
 
$
16.66

Nonvested at September 30, 2012
401,400

 
$
17.11