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Fair Value
9 Months Ended
Sep. 30, 2011
Fair Value [Abstract] 
Fair Value
17. Fair Value
In accordance with FASB ASC 820, “Fair Value Measurements and Disclosures”, the following table represents the Company’s fair value hierarchy for its financial assets and liabilities measured at fair value on a recurring basis as of September 30, 2011 and December 31, 2010:
                 
    Level 2     Level 2  
    September 30, 2011     December 31, 2010  
    ($ thousands)     ($ thousands)  
Derivative instruments (short term)
  $ 33,820     $ 22,940  
Derivative instruments (long term)
          11,166  
 
           
Total
  $ 33,820     $ 34,106