v2.4.0.6
Asset Retirement Obligations (Tables)
 9 Months Ended
Sep. 30, 2012
Asset Retirement Obligations [Abstract]  
Asset Retirement Obligation Rollforward Analysis
The following table presents the reconciliation of the beginning and ending aggregate carrying amounts of short-term and long-term legal obligations associated with the retirement of property, plant and equipment for the nine-month periods ended September 30, 2012 and 2011 (in thousands):

 
 
Nine Months Ended
 
 
 
September 30,
 
 
 
2012
  
2011
 
 
 
  
 
Carrying Amount at Beginning of Period
 
$
587,084
  
$
498,288
 
Liabilities Incurred
  
47,320
   
45,754
 
Liabilities Settled (1)
  
(56,150
)
  
(58,084
)
Accretion
  
22,714
   
20,125
 
Revisions
  
12,709
   
61,668
 
Foreign Currency Translations
  
5,140
   
(3,688
)
Carrying Amount at End of Period
 
$
618,817
  
$
564,063
 
 
        
Current Portion
 
$
27,615
  
$
30,306
 
Noncurrent Portion
 
$
591,202
  
$
533,757
 
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(1)Includes settlements related to asset sales.