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Other Expense, Other Income and Non-Operating Other Income, net (Tables)
 12 Months Ended
Dec. 31, 2011
Other Expense, Other Income and Non-Operating Other Income, net [Abstract]  
Other Expense, Other Income and Non-Operating Other Income, net
                         
    2011     2010     2009  
    (In Thousands)  
Other expense:
                       
Realized and unrealized losses on contractual obligations associated with carbon credits
  $ 1,844     $ 644     $ —  
Losses on sales and disposals of property and equipment
    1,280       460       378  
Miscellaneous expense (1)
    699       158       149  
 
                 
Total other expense
  $ 3,823     $ 1,262     $ 527  
 
                 
 
                       
Other income:
                       
Realized and unrealized gains on carbon credits
  $ 1,995     $ 644     $ —  
Settlements of litigation and potential litigation (2)
    1,562       —       50  
Property insurance recoveries in excess of losses incurred (3)
    —       7,518       —  
Miscellaneous income (1)
    381       265       237  
 
                 
Total other income
  $ 3,938     $ 8,427     $ 287  
 
                 
 
                       
Non-operating other income, net:
                       
Interest income
  $ 77     $ 133     $ 216  
Miscellaneous income (1)
    —       —       1  
Miscellaneous expense (1)
    (77 )     (80 )     (87 )
 
                 
Total non-operating other income, net
  $ —     $ 53     $ 130  
 
                 
     
(1)  
Amounts represent numerous unrelated transactions, none of which are individually significant requiring separate disclosure.
 
(2)  
Amounts relate primarily to settlements reached with certain vendors of our Chemical Business.
 
(3)  
Amount relates primarily to recoveries from property insurance claims associated with our Chemical Business.