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Statement Of Cash Flow Information (Tables)
9 Months Ended
Sep. 30, 2011
Statement Of Cash Flow Information 
Supplemental Cash Flow Information
                 
     
Nine Months Ended
 
     
September 30,
 
     
2011
     
2010
 
                 
Interest paid, net of capitalized interest
 
$
73,096
   
$
60,137
 
Income taxes paid
 
$
9,575
   
$
8,020