v2.4.0.6
Asset Retirement Obligations (Tables)
 3 Months Ended
Mar. 31, 2013
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 three-month periods ended March 31, 2013 and 2012 (in thousands):

 
 
Three Months Ended
 
 
 
March 31,
 
 
 
2013
  
2012
 
 
 
  
 
Carrying Amount at Beginning of Period
 
$
665,944
  
$
587,084
 
Liabilities Incurred
  
12,592
   
10,873
 
Liabilities Settled (1)
  
(24,831
)
  
(25,347
)
Accretion
  
9,660
   
7,751
 
Revisions
  
67
   
5
 
Foreign Currency Translations
  
(5,201
)
  
3,078
 
Carrying Amount at End of Period
 
$
658,231
  
$
583,444
 
 
        
Current Portion
 
$
19,186
  
$
42,457
 
Noncurrent Portion
 
$
639,045
  
$
540,987
 

(1)    Includes settlements related to asset sales.