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Earnings Per Share (Tables)
 12 Months Ended
Dec. 31, 2012
Earnings Per Share [Abstract]  
Schedule of Earnings Per Share, Basic and Diluted
The following table sets forth the reconciliation from basic to diluted average common shares and the calculations of net income per common share. Net income for basic and diluted calculations does not differ.
 
(in thousands, except per share amounts)
2012
 
2011
 
2010
 
 
 
 
 
 
Net income
$
28,903

 
$
32,687

 
$
21,117

 
 
 
 
 
 
Average common shares:
 

 
 

 
 

Basic (weighted-average outstanding shares)
11,899

 
11,848

 
11,782

Dilutive potential common shares from stock options
159

 
118

 
111

 
Diluted (weighted-average outstanding shares)
12,058

 
11,966

 
11,893

 
 
 
 
 
 
Basic earnings per share
$
2.43

 
$
2.76

 
$
1.79

 
 
 
 
 
 
Diluted earnings per share
$
2.40

 
$
2.73

 
$
1.78