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Hedge Contracts (Tables)
9 Months Ended
Sep. 30, 2011
Hedge Contracts 
Pretax Gain (Loss) on Derivative Instruments Table
   
Three Months Ended September 30, 2010
 
Derivative Swap Contracts
 
Oil
  
Natural Gas
  
Total
 
   
(In Thousands)
 
Amount of pretax gain reclassified from accumulated other comprehensive
         
  income into product sales revenue (effective portion)
 $6,753  $6,384  $13,137 
Amount of pretax gain (loss) from change in derivative fair value
            
  recognized in other comprehensive income
  (4,872)  1,938   (2,934)
Amount of pretax gain (loss) recognized in other income (expense)
            
  (ineffective portion)
  -   (108)  (108)
 
   
Nine Months Ended September 30, 2011
 
Derivative Swap Contracts
 
Oil
  
Natural Gas
  
Total
 
   
(In Thousands)
 
Amount of pretax gain reclassified from accumulated other comprehensive
         
  income into product sales revenue (effective portion)
 $1,177  $-  $1,177 
Amount of pretax gain (loss) from change in derivative fair value
            
  recognized in other comprehensive income
  (7,854)  -   (7,854)
Amount of pretax gain (loss) recognized in other income (expense)
            
  (ineffective portion)
  (13,947)  -   (13,947)
 
 
11

 

   
Nine Months Ended September 30, 2010
 
Derivative Swap Contracts
 
Oil
  
Natural Gas
  
Total
 
   
(In Thousands)
 
Amount of pretax gain reclassified from accumulated other comprehensive
         
  income into product sales revenue (effective portion)
 $16,821  $18,609  $35,430 
Amount of pretax gain (loss) from change in derivative fair value
            
  recognized in other comprehensive income
  4,577   9,225   13,802 
Amount of pretax gain (loss) recognized in other income (expense)
            
  (ineffective portion)
  125   107   232