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Investments (Tables)
9 Months Ended
Sep. 30, 2011
Investments [Abstract] 
Available-For-Sale And Held-To-Maturity Securities
Available-For-Sale And Held-To-Maturity Securities Included In Consolidated Balance Sheets
     September 30, 2011      December 31, 2010  
     Available-
for-Sale
Securities:
     Held-to-
Maturity
Securities:
     Available-
for-Sale
Securities
     Held-to-
Maturity
Securities:
 
     (In thousands)  

Cash and cash equivalents

   $ —         $ —         $ —         $ 6,200   

Short-term investments

     —           47,935         1         13,870   

Other long-term assets (including investments and restricted cash)

     —           1,280         —           1,280   
  

 

 

    

 

 

    

 

 

    

 

 

 
   $ —         $ 49,215       $ 1       $ 21,350