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Supplemental Schedule of Cash Flow Information
6 Months Ended
Jun. 30, 2011
Supplemental Schedule of Cash Flow Information [Abstract]  
Supplemental Schedule of Cash Flow Information
12. Supplemental Schedule of Cash Flow Information
     The following table reflects non-cash financing and investing activity during the following periods:
                 
    Six Months Ended June 30,  
    2011     2010  
    (In thousands)  
Capital leases issued for equipment
  $ 24,104     $ 6,691  
Asset retirement obligation additions
  $ 11     $ 12  
     Basic paid no income taxes during the six months ended June 30, 2011 or for the same period in 2010. Basic paid interest of approximately $18.6 million and $21.8 million during the six months ended June 30, 2011 and 2010, respectively.