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Fair Value Of Financial Instruments (Tables)
12 Months Ended
Dec. 31, 2011
Fair Value Of Financial Instruments [Abstract]  
Fair Value Measurements Of AFS Securities
     Fair                     
    

Value

  

Level 1

    

Level 2

    

Level 3

 
          (Amounts are in thousands)         

December 31, 2011

   $4,253,255      473,099         3,780,156         ---   

December 25, 2010

   3,096,033      223,655         2,872,378         ---