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Other Current Liabilities (Tables)
3 Months Ended
Mar. 31, 2012
Other Current Liabilities  
Schedule of other current liabilities
 
  March 31,
2012
  December 31,
2011
 
 
  (in thousands)
 

Other derivative agreements (realized)

  $ 7,857   $  

Other derivative agreements (unrealized)

    42,751      

Accrued interest

    33,544     17,867  

Partnership interest rate swap

    965     905  

Other accrued expenses and liabilities

    10,721     15,655  
           

 

  $ 95,838   $ 34,427