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Property And Equipment, Net (Tables)
3 Months Ended
Mar. 31, 2012
Property And Equipment, Net [Abstract]  
Schedule Of Property And Equipment, Net
     March 31,
2012
    December 31,
2011
 
     (In thousands)  

Property and equipment at cost

   $ 1,298,105      $ 1,271,634   

Less accumulated depreciation

     (947,303     (920,909
  

 

 

   

 

 

 

Property and equipment, net

   $ 350,802      $ 350,725