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Derivatives, Hedges, Financial Instruments and Carbon Credits (Tables)
3 Months Ended
Mar. 31, 2012
Derivatives, Hedges, Financial Instruments and Carbon Credits [Abstract]  
Assets and liabilities measured at fair value on recurring basis
                                         
          Fair Value Measurements at
March 31, 2012 Using
       

Description

  Total Fair
Value at
March 31,
2012
    Quoted Prices
in Active

Markets for
Identical Assets
(Level 1)
    Significant
Other
Observable
Inputs
(Level 2)
    Significant
Unobservable
Inputs

(Level 3)
    Total Fair
Value at
December 31,
2011
 
    (In Thousands)  

Assets - Supplies, prepaid items and other:

                                       

Commodities contracts

  $ 153     $ 153     $ —       $ —       $ 11  

Carbon credits

    42       —         —         42       42  
   

 

 

   

 

 

   

 

 

   

 

 

   

 

 

 

Total

  $ 195     $ 153     $ —       $ 42     $ 53  
   

 

 

   

 

 

   

 

 

   

 

 

   

 

 

 

Liabilities - Current and noncurrent accrued and other liabilities:

                                       

Contractual obligations – carbon credits

  $ 42     $ —       $ —       $ 42     $ 42  

Interest rate contracts

    1,971       —         1,971       —         2,241  
   

 

 

   

 

 

   

 

 

   

 

 

   

 

 

 

Total

  $ 2,013     $ —       $ 1,971     $ 42     $ 2,283  
   

 

 

   

 

 

   

 

 

   

 

 

   

 

 

 
Reconciliation of the beginning and ending balances for assets and liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3)
                                 
    Assets     Liabilities  
    Three Months Ended
March 31,
    Three Months Ended
March 31,
 
    2012     2011     2012     2011  
    (In Thousands)  

Beginning balance

  $ 42     $ 644     $ (42   $ (644

Transfers into Level 3

    —         —         —         —    

Transfers out of Level 3

    —         —         —         —    

Total realized and unrealized gain (loss) included in earnings

    —         40       —         (40

Purchases

    —         —         —         —    

Issuances

    —         —         —         —    

Sales

    —         (673     —         —    

Settlements

    —         —         —         684  
   

 

 

   

 

 

   

 

 

   

 

 

 

Ending balance

  $ 42     $ 11     $ (42   $ —    
   

 

 

   

 

 

   

 

 

   

 

 

 
Realized and unrealized net losses included in earnings and the income statement
                 
    Three Months Ended
March 31,
 
    2012     2011  
    (In Thousands)  

Total net gains (losses) included in earnings:

               

Cost of sales – Commodities contracts

  $ 142     $ (151

Cost of sales – Foreign exchange contracts

    —         40  

Other income – Carbon credits

    —         40  

Other expense – Contractual obligations relating to carbon credits

    —         (40

Interest expense – Interest rate contracts

    (96     (338
   

 

 

   

 

 

 
    $ 46     $ (449
   

 

 

   

 

 

 

Change in unrealized gains (losses) relating to contracts still held at period end:

               

Cost of sales – Commodities contracts

  $ 142     $ (82

Cost of sales – Foreign exchange contracts

    —         18  

Interest expense – Interest rate contracts

    270       52  
   

 

 

   

 

 

 
    $ 412     $ (12