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Earnings Per Share (Tables)
6 Months Ended
Jun. 30, 2013
Earnings Per Share [Abstract]  
Earnings per share on a basic and diluted basis
Earnings per share on a basic and diluted basis have been adjusted to give retroactive recognition to stock dividends and is calculated as follows (in thousands, except per share amounts):
 
Three Months Ended
June 30,
 
Six Months Ended
June 30,
 
2013
 
2012
 
2013
 
2012
Basic and Diluted Earnings:
 
 
 
 
 
 
 
Net income
$
10,072

 
$
7,729

 
$
18,597

 
$
17,868

Basic weighted-average shares outstanding
17,849

 
18,210

 
17,853

 
18,203

Add:   Stock options
32

 
13

 
26

 
13

Diluted weighted-average shares outstanding
17,881

 
18,223

 
17,879

 
18,216

 
 

 
 

 
 

 
 

Basic Earnings Per Share:
$
0.56

 
$
0.42

 
$
1.04

 
$
0.98

 
 

 
 

 
 

 
 

Diluted Earnings Per Share:
$
0.56

 
$
0.42

 
$
1.04

 
$
0.98