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Share-Based Compensation (Tables)
 6 Months Ended
Jun. 30, 2012
Share-based Compensation [Abstract]  
Summary of company stock activities
The Company’s stock option activity for the six months ended June 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 June 30, 2012
1,000

 
$
19.90

Vested and exercisable at June 30, 2012
1,000

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

 
$
16.09

Granted
208,250

 
$
18.35

Vested
(86,590
)
 
$
16.70

Forfeited
(7,990
)
 
$
16.69

Nonvested at June 30, 2012
402,960

 
$
17.11