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Supplemental Disclosures to the Statements of Cash Flows (Tables)
6 Months Ended
Jun. 30, 2011
Supplemental Disclosures to the Statements of Cash Flows (Tables) [Abstract]  
Supplemental Disclosures to the Statements of Cash Flows
                 
    Six Months Ended June 30,  
    2011     2010  
    (In thousands)  
 
Cash payments for interest, net of $4,072,000 and $1,315,000 capitalized in 2011 and 2010, respectively
  $ 23,727     $ 26,554  
Cash payments for federal and state income taxes
  $ 925     $ 655  
In-kind distributions to Series A convertible preferred unitholders
  $ 15,956     $