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Derivative Financial Instruments (Tables)
 12 Months Ended
Dec. 31, 2011
Derivative Financial Instruments [Abstract]  
Schedule Of Gain Or Loss On The Hedged Item In The Same Line Item, Other Revenue, As The Offsetting Loss Or Gain On The Related Interest Rate Swaps
     Year Ended December 31,  
     2011      2010      2009  

Income Statement Classification

    Gain (Loss)
on swap		     Gain (Loss)
on senior notes		      Gain (Loss)
on swap		     Gain (Loss)
on senior notes		      Gain (Loss)
on swap		     Gain (Loss)
on senior notes		  
     (Amounts in thousands)  

Other revenue

    $ (4,240 )    $ 4,240       $ (4,232 )    $ 4,232       $ (5,922 )    $ 5,922   
Summary Of Location And Amounts Of Derivative Fair Values In The Consolidated Balance Sheets
    Asset Derivatives     Liability Derivatives  
    December 31, 2011     December 31, 2010     December 31, 2011     December 31, 2010  
    (Amounts in thousands)  

Hedging derivatives

        

Interest rate contracts—Other assets (liabilities)

   $ 0      $ 4,240      $ 0      $ (1,139 ) 
 

 

 

    

 

 

    

 

 

    

 

 

  

Non-hedging derivatives

        

Interest rate contracts—Other liabilities

   $ 0      $ 0      $ (670 )    $ (1,903 ) 

Equity contracts—Short-term investments (Other liabilities)

     0        0        (655 )      (2,776 ) 
 

 

 

    

 

 

    

 

 

    

 

 

  

Total non-hedging derivatives

   $ 0      $ 0      $ (1,325 )    $ (4,679 ) 
 

 

 

    

 

 

    

 

 

    

 

 

  

Total derivatives

   $ 0      $ 4,240      $ (1,325 )    $ (5,818 ) 
 

 

 

    

 

 

    

 

 

    

 

 

  
Schedule Of Derivative Gains And Losses In The Statements Of Operations
     Loss Recognized in Income  
     Year Ended December 31,  

Derivatives Contracts for Fair Value Hedges

    2011      2010     2009  
     (Amounts in thousands)  

Interest rate contracts—Interest expense

    $ 4,470       $ 7,103      $ 7,022   
     Gain (Loss) Recognized in Other
Comprehensive Income		  
     Year Ended December 31,  

Derivatives Contracts for Cash Flow Hedges

    2011      2010     2009  
     (Amounts in thousands)  

Interest rate contracts—Other comprehensive gain (loss)

    $ 1,139       $ (220 )    $ (918 ) 
     Gain or (Loss)
Recognized in Income		  
     Year Ended December 31,  

Derivatives Not Designated as Hedging Instruments

    2011      2010     2009  
     (Amounts in thousands)  

Interest rate contract—Other revenue (expense)

    $ 1,232       $ (457 )    $ (1,446 ) 

Equity contracts—Net realized investment gains

      9,000         4,615        7,801   
  

 

 

     

 

 

    

 

 

  

Total

    $ 10,232       $ 4,158      $ 6,355