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Earnings per share (Tables)
 9 Months Ended
Sep. 30, 2012
Earnings per share  
Schedule of earnings per share

 

 

Three months ended September 30

 

Nine months ended September 30

 

 

 

2012

 

2011

 

2012

 

2011

 

 

 

Basic and
diluted

 

Basic and
diluted

 

Basic and
diluted

 

Basic and
diluted

 

Distributed earnings

 

$

0.31

 

$

0.31

 

$

0.93

 

$

0.93

 

Undistributed earnings

 

0.18

 

0.19

 

0.36

 

0.16

 

 

 

$

0.49

 

$

0.50

 

$

1.29

 

$

1.09