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Share-Based Compensation (Tables)
 12 Months Ended
Dec. 31, 2012
Share-based Compensation [Abstract]  
Summary of company stock activities
The Company’s stock option activity for the year ended December 31, 2012 is summarized as follows:
 
Shares
 
Weighted
Average
Exercise
Price
 
Weighted
Average
Remaining
Contractual
Term
 
Aggregate
Intrinsic
Value
Outstanding at January 1, 2012
281,725

 
$
18.27

 
 
 
 
Cancelled
(15,375
)
 
$
18.27

 
 
 
 
Exercised
(266,350
)
 
$
18.27

 
 
 
 
Outstanding at December 31, 2012
—

 
$
—

 
0
 
$
—

Vested and exercisable at December 31, 2012
—

 
$
—

 
0
 
$
—
Summary of company stock award
A summary of the status of the Company’s stock awards as of December 31, 2012, and changes during the year ended December 31, 2012, is presented below:
 
 
Shares
 
Weighted
Average
Grant-Date
Fair Value
Nonvested at January 1, 2012
289,290

 
$
16.09

Granted
295,465

 
$
19.09

Vested
(228,415
)
 
$
18.48

Forfeited
(9,480
)
 
$
16.64

Nonvested at December 31, 2012
346,860

 
$
17.06