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Capital Stock Transactions (Tables)
 9 Months Ended
Sep. 30, 2012
Capital Stock Transactions [Abstract]  
Schedule Of Capital Stock Repurchases

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Three months ended September 30,

 

Nine months ended September 30,

 

 

2012

 

2011

 

2012

 

2011

 

 

 

 

 

 

 

 

 

 

 

 

 

Shares repurchased

 

 
9,334 

 

 
1,530,030 

 

 
209,234 

 

 
1,871,543 

Weighted average price per share

 

$
62.75 

 

$
55.39 

 

$
56.03 

 

$
60.30